| Northern
Rockies Fire Behavior Outlook
(click on any graphic
in this product to enlarge it)
Valid
for: Sept 27 - Oct 04, 2012 |
Date/Time
Issued: 09/27/12 @ 1430MDT |
Next
Update: as warranted
|
Signed:
Risa Lange-Navarro, Fire Behavior Analyst |
This
is a general fire behavior outlook covering
the entire Northern Rockies Geographic Area.
It is designed to provide wildland fire managers
with an overall view of fire behavior potential
and to help wildland firefighters with the fire
order "initiate all actions based on current
and expected fire behavior". Firefighters
must use onsite observations and spot weather
forecasts to calculate site-specific fire behavior
for individual wildland fires.
Fire Weather
Summary:
NOTE: Fire Weather summary was done on the
date issued. Always check fire weather forecasts
daily for any changes.
**Red Flag Warnings/Fire
Weather Watches: Be aware there
may be Hazardous Weather Outlooks posted that
can affect fire behavior also. No Warnings or
Watches currently issued.
The relatively quiet pattern will continue
for the next week as a weak WNW flow continues
to dominate the weather pattern. The only weather
system to note is the passage of a weak dry
front across the ID Panhandle on Friday afternoon
and evening. The passage of this front could
bring a few sprinkles but the real impact will
be that it will allow for the smoke to vent
out for a little while. Westerly winds at the
ridgetop level may become breezy. However, afternoon
humidity levels in the 30-40% range may offset
impacts from the slightly breezy conditions.
Friday night and Saturday...the front will move
across MT. Breezy winds will be possible Saturday
afternoon across Central MT but again rhs should
help offset potential increases in fire danger.
Other than the passage of this front...not much
stands out over the next 6 days. Expect continued
inversion development at night followed by some
mixing out during the afternoons on the mid-slopes
and ridges which will allow for somewhat active
burn periods. Gone from the outlooks are the
days of single digit RHs.
From Tuesday on…Models continue to struggle
with the weather from Tuesday of next week onward.
Right now, not thinking that W MT and ID will
be impacted by the system that may come down
from the N. Probably an E MT and ND event, if
it does show up.
• *****For complete fire weather watch and warning details and
fire weather forecasts see:
Western
Region Fire Weather
**National
Current Weather Map/National Forecast NFDRS
Fire Danger:
| National
Current Weather Map: |
|
National
Forecast NFDRS Fire Danger: |
(Click
maps to enlarge) |
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|
|
See the
MesoWest
Regional Surface Map for
Northern Rockies area 24 hour precipitation
amounts.
See national
precipitation outlooks at U.S.
Today's Precipitation Outlook,
U.S.
Third and Fourth Day Precipitation Outlook , U.S. 5 Day
Precipitation Outlook, and U.S. 14 Day Precipitation
Outlook.
See 5 Day Weather Forecasts and Loops at
NWS
Northern Rockies Graphical Weather Forecasts.
State of the
Fuels:
• Northern
Rockies Fuels and Fire Behavior Advisory
• See
observed values and other information in both
the Northern
Rockies Fuels Status and the National
Fuel Moisture database. Add your
trapline to the mix! We
need to see more units conducting fuels monitoring.
There is only a handful for the entire geographic
area!!!
• SPECIAL NOTE - Beetle-killed
stands have increased dramatically over the
past few years. Most observations are in the
Ponderosa pine and Lodgepole pine stands throughout
the Northern Rockies. Some research (Canada
& USA) has shown foliar fuel moisture contents
of <40% combined with low RHs has the potential
for plume-dominated crown fire behavior. Recent
gray-dead standing snags add significantly to
fire intensity and spotting potential (i.e.
bark pieces) when combined with a ladder-fuel
understory. This type of fire behavior has been
known to happen with-in minutes of the understory
igniting. In addition, there have been instances
of independent crown fire activity without surface
fire in red phase. One good hint is if the temperature
is above 75°, the foliage is in sunlight
and the relative humidity is less than 20% RH
expect rapid transition from surface to crown
fire to occur.
Also of note is the impact Spruce budworm
has taken on young fir trees, stressing them
out then killing them adding to “dry”
ladder fuels in the timber area if the Northern
Rockies.
• SPECIAL NOTE - Snowpack/Spring
precipitation in the Northern Rockies
this past winter/spring has been inconsistent
throughout the area. Majority of the fine, flashy
fuel growth was not compacted by the 2011-2012
snowpack. This has left light flashy fuels left
over from 2011 combined with this years’
cured and green-but dry light flashy fuels creating
conditions for high intensity, high rates-of-spread
fires. This situation is especially evident
in the valleys and foothills.
• So here’s the deal, until we can
get a long duration precipitation event over
the Northern Rockies we’re stuck in the
dry weather and dry fuels However, there is
a possible glimmer of hope next week with a
system moving in from Canada with cooler air
and precipitation. We’ll have to wait
and see. The fuels in north ID and the far northwest
corner of MT are way behind the rest of the
Northern Rockies when it comes to dry fuels.
Given we’re going into October they may
or may not catch-up at all.
• Foliar moisture continues to drop whether
phenologically or drought related, although
there are some fuels showing signs of foliar
moisture bottoming out for this year. Either
way this continues to increase the availability
of these fuels into the mix. As mentioned numerous
times this spring and summer, bug-killed stands
continue to be a problem with their low or non-existent
fuel moisture and expansive coverage in the
central and southern areas of MT. Resistance
to control still increasing even though we’re
moving into fall conditions of cool nights and
shorter daylight hrs.
• With no change moisture-wise the 10hr,
100hr and 1000hr fuels continue to dry and dry
and dry. Overall in the higher elevations on
all aspects these fuels are the prime carriers
of fire however look for this to decrease given
historical decreased burning time in these areas
due to cooler temperatures and higher relative
humidities common at this time of year. With
what we had this fire season and the prediction
of an El Niño winter the dry heavy fuel
situation could set us up for another active
fire season next year, more on that at a later
date-say next year.
• The live foliar moisture in brush and
timber, as mentioned earlier, continues to drop
due to the shorter days, overnight freezes and
drought-like conditions causing these fuels
to become brittle to the touch. More and more
brush and trees are changing color as we enter
the fall season and early October. Monitor your
fuels and fuel moistures. (HINT: Are you taking
fuels samples? Are you reporting them in the
National Fuels Monitoring Database?)
• The Relative Greenness maps (Sept 18-24),
continues to show moderately drier (less green)
to extremely dry fuel situations for the majority
of MT, all of ND, northwest SD and the Camas
& Palouse Prairies of central ID. Normal
or greener than normal areas include the far
southwest corner of Yellowstone NP, with parts
of the ID Panhandle and parts of northwestern
MT. There is however an area of extreme dryness
southwest of Flathead Lake in the Hot Springs,
MT vicinity and pretty much the whole Bitterroot
River Valley, including side drainages, that
continues to show as very dry with pockets of
extreme.
• Current US Drought Monitor (Sept 25)
maps show almost all of the Northern Rockies
under an Abnormally Dry to Severe drought condition,
covering most of MT and all of ND. There is
an area of Extreme Drought in the center of
MT and a finger into the southern border of
MT/WY. ID Panhandle and northwestern MT appear
to have normal conditions for this time of year
though both areas are curing and drying out.
The southern half, and now southwest MT and
along the Rocky Mtn Front of MT as well as far
eastern part of ND are in both a short and long
term drought impact. With no major widespread,
long-duration precipitation event in the future
expect these conditions to continue spreading
northward and westward over the geographic area.
Outlook (Sept 20-Dec 31) calls for “Persistence”
in the drought to continue over the southern
and eastern part of the Northern Rockies. The
rest of the areas have now been classified in
the “Drought development likely”
category. Not good news as we move into the
fall and then winter seasons. Both seasons have
a big impact on the heavy fuels fuel moisture.
• Live Fuel moistures (measured) reported
last 14 days:
Douglas-fir (DF), Lodgepole Pine (LPP), Ponderosa
Pine (PP), Sub-alpine Fir (SAF), Engelmann Spruce
(ES), Red Alder (RA), Thinleaf Huckleberry (TLH),
Common Juniper (CJ), Rocky Mtn Juniper (RMJun),
Kinnikinnick (K), Pinegrass (PGr), Mtn Big Sagebrush
(Mtn BSb), Silver Sagebrush (SSb ), Wyoming
Big Sagebrush (WBSb), Mountain Snowberry (MS),
Western Snowberry (WS), Serviceberry (Sb), Utah
Serviceberry (USb), Bluebunch Wheatgrass (BWGr)
• Absaroka Range, Southcentral
MT – 1000hr 10%, DF 123%, Duff
13%.
• Central MT- Big Belt Mtns
-1000hr 6-11%, RMJ 94-99%, Mtn BSb 69-89%; Elkhorn
Mtns -1000hr 7-9%, RMJ 75%, Mtn BSb
61%.
• Flathead NF (Salish & Swan
Mtns)/West Glacier NP - 1000hr 8-17%,
LPP 104-129%, DF 97-147%, ES 97% PGr 161%, USb
135%.
• Western Lolo NF - 9/22
Fuels conditions have remained relatively static
over the course of the two weeks +. Higher elevations
and northerly aspects above 5,500 feet look
relatively green. However, dead fuels are readily
available for consumption, and duff layers have
dried out to depths of 12-16 inches. On mid/lower
elevations and southerly aspects, limited moisture
and warm/dry weather have the ERCs (66-82) and
1000 hr fuel moistures (7-9%) at the 96th percentile.
Mid/lower elevations and southerly aspects have
live woody fuel moistures ranging from 70-74%
and ninebark leaves in the majority of locations
are red and brittle. Herbaceous fuel moistures
on warmer sites have shifted to fine dead fuel
loadings. Fine fuel moistures are 4-5%. The
100 HR and 1000 HR fuels are burning readily
and have fuel moistures at 6-9%. Fire danger
is Extreme on warm and dry sites. Higher elevations
and northerly aspects above 5,500 feet, the
potential for starts has increased significantly
and fires should be expected to make runs when
winds and slope align, expect active group torching
and medium range spotting. Fires established
in heavy fuel loads will be very resistant to
control. Warm and dry sites have reached a critical
stage where any ignition source has the potential
to start a fire and control problems should
be expected. Fire growth potential is high and
rapid rates of spread, surface fire flame lengths
of 4+ feet, active group torching, potential
crowning, and medium to long range spotting
should be expected. This is a critical stage
where extreme fire behavior or large fire growth
could be expected if winds and slope align.
• Southeastern MT –
1000hr 8%, PP 118%, RMJ 85%, WBSb 128%.
• Yellowstone National Park
- 100hr 7-12%, 1000hr 6-12%, LPP 116-120%, DF
118%, SAF 111%, ES 105-107%, WBSb 75-77%, PGr
78-172%, Elk Sedge 84-119%, Whortleberry 101-109%,
Duff 17-51%.
Fire Behavior Outlook:
***The fine, flashy fuels were not
compacted by the 2011/2012 snowpack. These 2011
fluffy, fine fuels added to the 2012 fluffy,
fine fuels have been a major carrier of fires
throughout the geographic area. REMEMBER, these
fuels are one of the Four Common Denominators
for Fatal or Near-Fatal wildfires.***
For ALL areas: This year has
had more wind events and storms with high winds
than usual. Be heads up to changes in the weather
on your incidents. In addition, we’ve
experienced more dry cold fronts than usual
this year. Now that we’re into early fall,
climatologically the dry cold front season usually
ends by the first week of October. During this
time of year the chances of lightning will diminish
greatly, not that we can’t have a lightning
event it’s just becomes rarer and rarer.
Although the big fires days have decreased
in the last week or so there are still plenty
of opportunities. Fire behavior this year has
been very much fuel driven. We’re now
heading into October with maybe, maybe some
precipitation predicted late next week. Until
any appreciable precipitation occurs fires will
continue to have a very high potential of growing
rapidly in size. What fuels are out there are
most likely available to burn, maybe some live
fuels in the northwest corner of the geographic
area aren’t there yet but with cooler
nights these fuels may become available due
to frost kill. Rapid growth on existing fires
as well as kicking up any undetected fires is
occurring or has a very high potential to occur.
Without rapid initial attack responses most
fires will continue to have high probabilities
of growing in size rapidly and exhibit torching
and spotting to varying degrees, especially
in the lighter, grassy fuels. Short & long
range spotting opportunities will continue with
any predicted breezy conditions and dry fuels.
Holdovers are still popping up, some up to a
week after the ignition.
Recent poor relative humidity recovery and
very strong & deep thermal belt (inversion)
development have moderately lately, but when
they do exist they will increase the opportunity
for fires to burn intensely throughout the nighttime
hours. Watch for any inversions breaks which
will cause intensities of fires to rapidly increase
and have the high potential of rapid runs during
the night and then especially once the sun comes
up causing the inversion to rapidly clear out
of the fire area. Add any kind of winds and
these situations could be explosive. Most areas
are seeing inversion breaks anywhere from mid-morning
to late afternoon. One thing that will increase
the chances of lingering inversions is the decreasing
sun angle we are getting now that the Autumn
Equinox has passed.
With cold nights, any uncured (if there are
any left) light fuels are very susceptible to
frost kill, a weather condition common now through
the end of the year. We continue to see higher
elevation RAWS stations and low valley areas
with several hours of below freezing temperatures,
common during this time of year. In addition
to these fuels, all other live fuels are also
susceptible to “radiant heat curing”.
If located close enough to radiant heat from
the fire, it can be quickly cure the fuels.
Smoky conditions have been the norm the last
few weeks and continue to influence fire behavior
throughout the Northern Rockies particularly
in the mountainous areas. Fires that are shaded-out
by smoke from fires upwind usually see an increase
the relative humidity in the fire area thus
decreasing fire activity. Smoky conditions can
also make it almost impossible to see what kind
of weather is coming as well as hide spot fires
or any new fires. These situations can change
rapidly due to weather conditions.
Majority of the RAWS stations are showing a
drop in their ERC’s. Although a majority
are at the extreme levels, almost all are setting
new maximums for this time of year. Indices
are just now starting to level off and some
are beginning to drop with decreased temperatures
and shorter daylight hours. Moisture is the
only thing that will really drop the numbers.
Northcentral
Idaho/Southwest Montana/Big Hole Montana/Southern
Montana/Central Montana/Glacier National Park/
Glacier National Park/Northern Rockies Front
Range Montana /Yellowstone National Park/Southeastern
Montana/North Dakota/Northwest South Dakota:
Without any wide spread, long duration precipitation
events predicted in the next week or so the
majority of the Northern Rockies should continue
to experience ACTIVE
to EXTREME
fire behavior when winds, high temperatures,
low relative humidities, aspect and slope combine.
Light/flashy fuels, brush, bug-killed stands
and heavy dead/downed fuels seem to be the main
carriers for surface fire although with recent
frosts brush fuels are adding to the mix. Transitions
from surface to crown fires are common, especially
in beetle-killed stands, and thick timber stands
with heavy dead/downed fuels occur. Any predicted
dry fronts will continue to worsen the already
extreme conditions here in the Northern Rockies.
Short & long duration crown fire runs are
common place with these dry fuel conditions.
Spotting distances could reach over a mile,
given the right conditions. These conditions
can surprise many fire fighters causing them
to re-evaluate their tactics as it relates to
fire behavior beyond ground crew capabilities.
Early fall conditions of overnight frosts have
“dried” any remaining light fuels
at most elevations. Expect MODERATE
to ACTIVE
fire behavior in areas where any appreciable
precipitation has occurred.
Northern Panhandle/Far
Northwest Montana:
The longer the Season ending event holds off
the more chances these areas have of getting
even a little bit of fire season. However, depending
on what occurs in the next week or so will determine
the fire activity in these areas. Predicted
drier conditions and some winds will increase
opportunities for initial attacks. Upper elevations
green fuels with high live foliar moistures
are hanging in there; but like September, October
is also known for its frosts which could frost-cure
fuels making them available for burning rather
quickly during any warm/dry periods. Fall conditions,
for the most part, should create LOW
to MODERATE
fire behavior.
Observed
Fire Behavior:
Recently the high pressure
ridge that had taken up residence over the Northern
Rockies shifted to the east. The inversions
were not as deep as they had been there in the
Central ID area on the McGuire fire.
Until any long-term moisture occurs to slow
the influence of the currently dry and cured
light/fluffy/flashy fuels, sagebrush and timber
we will continue to experience rapid rates-of-spread
intensified with any winds, well yeah... Heavy
dead/down fuels are burning and at all elevations
as well as contributing to common place individual
or group tree torching in the surrounding stands
of timber. Transitions from surface fires to
crown fires have been dramatic and surprisingly
quick, with or without the wind. This is especially
true in the bug-killed timber stands and in
areas that have experienced deep thermal belts.
These transitions are occurring during the late
evening into mid-morning where these thermal
belts extremely strong. Overnight intense burning
in general seems to be common in these areas
too. Major burning periods have been significantly
decreasing with most observed from 1400-1800
hrs; longer if the area is situated in a deep
thermal belt, shorter if the fire loses direct
sunlight due to shorter daylight hours in general.
Although valleys, mostly in central ID and the
mountains of MT have been continually smoked
in other areas with strong inversions have observed
the higher elevation parts of the fire-above
the inversion-continue to become active as soon
as the sun hits it. However as the inversion
mixes out there is somewhat of a lull in the
fire activity at higher elevation as the inversion
mixes out at the lower elevation and shades
the fire activity at higher elevation. This
lull is occurring until the inversion is completely
mixed out of the area. In some ways this creates
two burning periods for active fire above the
inversions-one first thing in the morning since
it’s above the inversion and the second
at the usual time around 1200hrs or when the
inversion mixes out of the area. Watch for inversions
to linger longer with the shorter daylight hours.
Instances of short/long duration crown runs
with little or no wind, as well as spotting
distances up to a mile or more especially with
wind (basic fire behavior: wind + ignited embers=short
to long spotting distances) have been observed
on several fires. Besides the dryness of the
fuels, predicted breezy weather will increase
the occurrences of spotting for the next week
or so. Another observed condition in bug-hit
timber is single/group tree torching from the
interior lofting spots well beyond control lines.
Make sure all your fire personnel are aware
and monitor these conditions.
With the continuing activity from large fires
to the west of us, smoke from these fires has
decreased fire activity on fires in our area
as long as the general flow is westerly. This
is not only affecting the relative humidity
and temperatures, it is also making it difficult
to detect spot fires and/or new starts as well
as any aviation activities.
CONDON MTN, Flathead NF, located
5 Miles Northeast of Condon, MT. Burning in
timber, litter and understory with a high density
of dead standing white bark pine. On 9/19 the
fire was highly active and growing with an active
crown fire with long range spotting. The fire
was spotting 1/4 mile into and making runs in
the Smith Creek drainage. The fire also grew
towards Smith Creek Pass; however it did not
reached the pass. The fire also backed down
the west face of the mountain between Condon
and Smith Creeks, with occasional single tree
torching occurring, visible from Condon. On
9/26, after the inversion lifted around noon,
an increase in fire behavior was observed, including
flanking, backing, and short uphill runs with
isolated group tree torching. Firing operations
helped maintain an even line of fire. Current
fire behavior consists flanking, backing, and
short uphill runs with isolated group tree torching
usually after the inversion lifts by mid-afternoon.
COTTONWOOD CREEK, Dakota Prairie
Grasslands, located 30 miles SSW of Watford
City, ND. Currently the fire is burning in juniper,
sage and short grass. Minimal behavior with
creeping and single tree torching reported.
CYGNET COMPEX (Beach 2, Cygnet, Dewdrop
2 & Range), Yellowstone National
Park-NPS, located throughout the Park in WY.
Fires are burning in timber and grass. The potential
for fire activity has increased due to very
dry vegetation combined with warmer temperatures,
low humidity and strong winds. Fires are actively
burning, especially during the afternoon and
early evening.
EAGLE CREEK, Northern Cheyenne
Agency-BIA, located 13 miles SW of Lame Deer,
MT. Fire is burning in timber and grass. When
this fire started on 9/22 fire behavior was
wind driven fire with running and spotting.
Current fire behavior consists of smoldering
and creeping.
EAST FORK, Helena NF, located
25 miles WSW of Augusta, MT in the Scapegoat
Wilderness. The fire is burning in dense timber
stands of contiguous sub-alpine fir, with numerous
snags in and around the fire area on steep terrain.
Recent fire was smoldering and isolated torching
within the interior.
ELBOW PASS COMPLEX (Bar, Elbow Pass,
Rapid Creek & Triple Divide fires),
Lewis and Clark and Flathead NFs, located 25
miles WSW of Augusta, MT. Rapid Creek, Bar and
Elbow Pass have merged. Burning in mixed green
timber with bug-killed red and dead standing
timber with forest litter and understory fuels.
Recent fire activity consists of widespread
single tree torching and some group torching
in areas with remaining heat. Short uphill runs
possible where slope, winds, fuels align.
FALLS POINT, Lolo NF, located
27 miles E of Seeley Lake, MT. Burning in timber,
understory with heavy dead/down fuels. When
reported 7/31, fire was crowning, running with
100-200 ft. flame lengths The fire is currently
burning in an area affected by the Canyon Creek
Fire in 1988, the Cabin Creek Fire in 2001 and
the Conger Creek Fire in 2007. The regeneration
created by these fires and their high live fuel
moistures are acting as a governor on fire growth.
Recent fire behavior consisted of 9/24 actively
burning ground fuels in a small patch on a western
flank of the fire. The fire has grown around
70 acres this past week, most of it being on
that western or southwestern aspect. It continues
to skunk around in the litter and brush, doing
a nice underburn, working its way down a seasonal
stream drainage to the south and west. It has
not made any big runs or torched many trees
in the last week for that matter. On 9/26 The
Falls Point fire continues to burn in ground
fuels on the southwestern aspect of the fire.
The fire has grown around 05 acres in the past
week, most spread being in this southwestern
vicinity. Overall the fire continues to skunk
around in the litter and brush, working its
way down the more sun drenched slopes. It has
not made any runs or torched many trees in the
last week. On the NE flank the fire is within
50 yards of Driftwood Lake and it does not appear
that the fire will have enough activity to go
around or across the Driftwood drainage.
MCGUIRE COMPLEX (Herman and McGuire),
Nez Perce NF, located 5 miles west of Dixie,
Idaho. Fire is burning in heavy timber (sub
alpine fir & lodgepole pine) with a lot
of dead and down fuel. The lodgepole pine stands
contain beetle-killed timber. The fires are
burning in heavy timber of sub-alpine fir and
lodgepole pine that contains extensive beetle-killed
stands. On 9/16 the fire made a significant
run on the east flank. On 9/25 all areas of
the fires picked up in activity after the inversion
lifted at around 1100. Single and group tree
torching with short range spotting were observed
on the west perimeter west of Sinker Mountain.
Fire spread in this area was approximately 1/4
mile towards the east. Increased activity was
also noted in the Orogrande Summit and Lake
Creek Drainage areas. Fire behavior is generally
low in the morning; activity picks up around
1100 when the inversion lifts. Peak fire activity
9/27 will be between noon and 5:00 p.m. The
fire will primarily creep and smolder; in the
mixed-conifer forests, fire behavior might consist
of single- or group-tree torching and short-range
spotting.
MILLIE, Yellowstone RD/Gallatin
NF, located 20 miles south of Bozeman, MT. Fire
is burning in timber (litter and understory),
subalpine fir, and mixed conifer, with large
amount of bug kill. Recent fire behavior is
reported to be smoldering and creeping.
MUSTANG, Salmon-Challis NF/Bitterroot
NF, located north of the Main Salmon River,
from Sabe Cr on the westside to North Fork,
ID on the eastside. This fire stretches over
60 air miles from east to west. It has also
burned onto the Bitterroot NF in the upper reaches
of the West Fork Bitterroot River and Hughes
Creek in MT. The fire is burning in fuel model
1, 2, 8 and 10. At lower elevations the fire
is burning in Ponderosa pine with grass and
brush understory. At higher elevations, lodgepole
pine with heavy dead and down with extensive
red-needle bug kill. On 9/18 uphill runs with
flame lengths of 12-15 ft., Rates of spread
of 1/4 mile per hour and group tree torching
observed during firing operations on Division
P were observed with smoldering and creeping
interior burning was observed elsewhere on the
fire. On 9/24, approximately .05 inches of rain
received throughout the fire which drastically
subdued fire activity during the burn period.
Recent fire behavior consisted of minimal spread
with some isolated torching and some interior
spots burning with occasional tree torching.
There were no visible large columns of smoke.
The most active area of the fire is located
in the northwest section between the Mustang
and Porcupine fires however, only minimal fire
activity was observed there. Thick smoke in
the drainages prevented any confirmation of
the two fires joining.
PINE CREEK, Central Land Office-MT
DNRC, located 9 miles S of Livingston, MT. Fire
is burning in fuel model 10 timber (litter and
understory), heavy dead standing and down with
gray-stage beetle kill trees. Current fire behavior
consists of creeping and smoldering.
PORCUPINE COMPLEX, Nez Perce
NF, located 25 miles east of Elk City, ID. Fire
is burning in fuel model 10 Timber (litter and
understory), heavy timber and some areas of
bug killed trees. Fire behavior on 9/24 included
frequent single tree torching with short range
spotting in a few isolated areas. Widespread
smoke and cloudy conditions provided shade over
the fire for most of the day. These factors
combined with higher humidity, lower temperature,
and light, intermittent rain kept fire activity
low. Current fire behavior has been generally
low in the morning; activity usually picks up
around 1100 when the inversion lifts. Peak fire
activity has been between noon and 5:00 p.m.
The fire has primarily crept and smoldered;
in the mixed-conifer forests, fire behavior
might consist of single- or group-tree torching
and short-range spotting. The most active area
has been in the Sinker Mountain area, with some
spread expected into the wilderness on the west
flank.
POWELL SBW (Powell SBW West Complex,
Powell SBW East Complex, Bell Point, Mocus and
Eagle-Robin fires), Clearwater NF,
located 37 miles SW of Lolo, MT in the Selway
Bitterroot Wilderness. Fire is burning in timber
(litter and understory). On 9/26 fire behavior
consisted of light winds, higher humidity’s
and cooler temperatures due to a storm system
that passed to the south aided in regulating
fire growth over the weekend. Fire activity
consisted of isolated torching and backing fire.
SAWTOOTH, Bitterroot NF, located
7 miles WSW of Hamilton, MT. Fire is burning
in grass & timber (lodgepole pine) and high
sub-alpine ecosystem. Starting on 9/9 through
9/10 dry cold front winds hit the fire with
speeds of up to 40mph with gusts 50+ mph causing
the fire to grow rapidly in size to about 4000
ac and spreading east toward the mouth of the
Sawtooth drainage, across the Bitterroot Face
and slopping into Canyon Cr. Current fire behavior
consists smoldering and creeping with slight
growth on west side toward wilderness. Fire
is still confined to Sawtooth Canyon drainage.
SHEEP, Nez Perce NF, located
.5 miles E of Lucille, ID. Fire is burning in
timber, brush, grass and heavy fuels. Overnight
and into the morning of 9/9 extreme fire behavior
was reported with an estimated 7 mile run to
the northeast over John Day Mtn, through John
Day drainage and into the Slate Cr drainage.
Current fire activity consists of moderate behavior
with single and group tree torching, short runs,
and short range spotting. Active surface fire
observed on the warmer exposed sites throughout
fire.
WALL CREEK, Flathead NF, located
30 miles E of Swan Lake, MT in the Bob Marshall
Wilderness Area. Fire is burning in heavy timber,
mostly Subalpine-Fir and Spruce. Fire behavior
has mostly been a surface fire with isolated,
single tree torching. On 9/14 there was increased
fire behavior with the addition of spotting
and short crown fire runs. Evening of 9/15 and
9/16 most active burning in the high elevation.
Fire burned around Christopher Lake basin and
the bowl below the Wall Creek cliffs. 9/20-
Moderate fire behavior with single tree torching
and about 100 acres of fire growth.
WEDGE CREEK, Seeley Lake RD/Lolo
NF, located 16 miles E of Seeley Lake, MT. Fire
is burning in steep terrain and a mixture of
mixed conifer and sub alpine fir with a heavy
component of dead and down materials with intermittent
bug-killed trees. These fuels are discontinuous
and separated by rocky scree slopes and barren
areas. Overall throughout the Wedge Creek fire
area, the fuels are at critically low fuel moisture
levels and the forest is experiencing historically
dry conditions for this time of the year. Fuel
conditions are changing. Areas with grass and
shrubs that were normally retarding fire growth
due to high live fuel moistures are now starting
to cure to much lower fuel moistures due to
freezing temperatures at night and early morning
hours. This transition has been slow in taking
place as several of the weather stations around
the area have shown some frost events but not
for long enough periods of time to totally transition
the live fuels to dormant or cured stages. Once
this occurs, fire behavior will become more
active in areas with these fuel types. On 9/26
an aerial reconnaissance of the Wedge Creek
fire area showed the main body of fire activity
is in the Falls Creek drainage south of Conger
Point and on the southeast slopes of Wedge Creek.
Wedge Creek is displaying more activity than
it has recently and will require more close
surveillance. In Hayden Creek the fire activity
was sporadic with no indicators of uniform or
vastly increased fire spread. Overall, the fire
has grown about 20-30 acres. The current fire
behavior pattern is rolling debris consisting
of logs or pinecones ignite heavy fuels below
burn up hill creating torching and large flame
lengths and then spotting continues. The fire
activity in Hayden Creek is slowly working down
out of the bowl in fingers and spots. The fire
also continues to be active in the bottom of
the drainage at the head end of Wedge Creek
where the fire started.
WHITE HORSE, Confederated Salish
& Kootenai/Flathead Agency-BIA, located
10 miles E of Arlee, MT. Fire is burning timber
on steep slopes. On 9/15-16 RH recoveries only
made it to 18% and with that the fire became
quite active overnight into the next morning
with short runs and spotting. Fire behavior
consists of smoldering and creeping.
WILSON, Southern Land Office-MT
DNRC, located 8 miles SE of Roundup, MT. Fire
currently burning in timber and grass. On 9/22
when the fire started the fire quickly grew
in tinder-dry fuels. Most recent fire behavior
consisted of moderate activity with torching,
creeping and smoldering.
Approximately thirty three other incidents/complexes
ranging from less than 1 ac to approximately
12,000 ac throughout the Northern Rockies with
the majority of them in and around the Selway-Bitterroot
Wilderness and Bob Marshall Wilderness. They
are in FSPC=Full Suppression (Perimeter Control),
PZP=Point or Zone Protection (Limited Perimeter
Control) or CON=Confine Strategy.
For
other fires in the Northern Rockies or the Nation,
visit the InciWeb
site or the MODIS
Active Fire Mapping Program site.
• Tell
your story, send a picture! Share your observations
with inquiring minds. Call (406) 329-4924 and
contribute to improved firefighter awareness
and safety.
See also Northern
Rockies 7 Day Significant Fire Potential
and 7 Day National Fire Potential Map.
See 6-10 and 8-14 day
outlook charts located: 6-10
Day Prognosis, 8-14
Day Prognosis.
**Important
Predictive Services Area Indices: (See
Northern Rockies ERC,
1000-Hr
and 100-Hr
Charts) as
of September 26, 2012
>> REMEMBER most of the weather
information comes from Sig’s and not single
RAWS<<
**Overall
ones to watch are PSAs 07, 11, 12 & 13**
Interesting comparison between 2000 and 2012
is in 2000 by the first week of September the
ERCs, 1000hr and 100hr had all began to recover
and ERCs trended downward and 1000hr and 100hr
fuels were increasing in moisture content by
NFDRS standards. This year we may have hit the
peaks in ERCs and the bottoming out for the
1000hr and 100hr fuels as depicted by the Indices.
Energy Release
Component (ERC): Most
PSA’s showing a downward trend; maybe
they’ve hit their peak for season. PSA
10 is showing a leveling out and PSA 12 is
actually showing an upward trend…go
figure.
• PSAs-07, 10,
11, 12 & 13 are Above the 97th percentile,
Above the 2000 indices AND Setting new MAX’s.
• PSAs-03 & 08 are Above the 90th
percentile, Above the 2000 indices AND Setting
new MAX’s.
• PSA-04 is Above the 90th percentile,
Above the 2000 indices AND Tracking with the
MAX.
• PSA-02 is Above the 90th percentile,
Above the 2000 indices AND Approaching the
MAX.
• PSAs-05 & 09 are Above the 90th
percentile AND Above the 2000 indices.
• PSA-01 is Above Average AND Above
the 2000.
• PSA-06 is Above Average AND Tracking
with the 2000.
Heavy Fuel
Moistures:
For
1000- hour fuels - Most PSA’s showing
a bottoming out and upward trend for season.
PSAs 04, 07, 10, 11 & 12 are showing a
leveling out and PSA 13 is actually showing
a continued downward trend
• PSAs-03, 04, 06, 07, 08, 09, 10, 11,
12 & 13 are Below (drier than) the 3%
(97th percentile), Below (drier than) the
2000 indices AND Setting new MAX’s.
• PSAs-02 & 05 are At the 3% (97th
percentile), Below (drier than) the 2000 indices
AND Setting new MAX’s.
• PSA-01 is At the 10% (90th percentile),
Below (drier than) the 2000 indices AND Approaching
the MAX.
For 100- hour fuels - Most PSA’s showing
a bottoming out and upward trend for season.
PSAs 07, 10, 12 & 13 are showing a leveling
out trend
• PSA-07 is At the 3% (97th percentile),
Below (drier than) the 2000 indices AND Setting
new MAX’s.
• PSA-12 is Below (drier than) the 3%
(97th percentile), Below (drier than) the
2000 indices AND Setting new MAX’s.
• PSAs-08, 11 & 13 are At the 10%
(90th percentile), Below (drier than) the
2000 indices AND Setting new MAX’s.
• PSA-10 is Below (drier than) the 10%
(90th percentile), Below (drier than) the
2000 indices AND Setting new MAX’s.
• PSAs-04, 05 are Below (drier than)
Average AND Approaching the 2000 indices.
• PSAs-01, 02, 03 & 09 are Below
(drier than) Average AND Below (drier than)
the 2000 indices.
• PSA-06 is Below (drier than) Average
AND Above (wetter than)the 2000 indices.

(Click
on PSA for specific ERC, 1000-hr and 100-hr
Fuel Moisture graphs)
| **Departure
From Average Greenness |
|
**Percent
of Average Precipitation |
(Click
maps to enlarge) |
 |
|
 |
Validation and Feedback:
Please contact the the NRCC Predictive Services Group
at 329-4880 to provide us feedback on the accuracy
of these forecasts. Your observations about
general fuel conditions and observed fire behavior
help us validate the accuracy of our forecasts.
Our bottom line and the reason we are here is
to provide for the safety of firefighters in
field.
BASE ALL ACTIONS
ON CURRENT AND EXPECTED FIRE BEHAVIOR! |