Smoke Transport/Stability Forecast

Redding Fire Weather Center

1430 PDT Friday April 18, 2008

Discussion for Northern California: A significant weather pattern change this weekend will not only bring a more unstable airmass into the region for higher mixing depths, but there will also be a lot of wind to provide for excellent transport Saturday.

NORTH COAST AIR BASIN- COASTAL

Saturday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: NW-14

Winds at 2000 ft: NW-28 4000 ft: N-28 8000 ft: NW-29

Saturday Afternoon (4 PM)...

Mixing Heights: 3200 ft.

Transport Winds: NW-15

Winds at 2000 ft: NW-20 4000 ft: NW-251 8000 ft: NW-35

Sunday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: NW-05

Winds at 2000 ft: NW-15 4000 ft: NW-19 8000 ft: NW-24

NORTH COAST AIR BASIN- INTERIOR

Saturday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: W-08

Winds at 2000 ft: NW-20 4000 ft: NW-31 8000 ft: W-36

Saturday Afternoon (4 PM)...

Mixing Heights: 3900 ft.

Transport Winds: NW-15

Winds at 2000 ft: NW-22 4000 ft: NW-27 8000 ft: NW-42

Sunday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: WNW-05

Winds at 2000 ft: NW-20 4000 ft: NW-23 8000 ft: NW-25

NE PLATEAU AIR BASIN- SISKIYOU CO

Saturday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: NW-02

Winds at 2000 ft: NW-19 4000 ft: WNW-30 8000 ft: W-36

Saturday Afternoon (4 PM)...

Mixing Heights: 5300 ft.

Transport Winds: NW-12

Winds at 2000 ft: NW-24 4000 ft: NW-24 8000 ft: W-30

Sunday Morning (4 AM)...

Mixing Heights: 1100 ft.

Transport Winds: NW-04

Winds at 2000 ft: NW-10 4000 ft: NW-23 8000 ft: NW-37

NE PLATEAU AIR BASIN- EASTSIDE

Saturday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: W-09

Winds at 2000 ft: WSW-24 4000 ft: WSW-32 8000 ft: WSW-37

Saturday Afternoon (4 PM)...

Mixing Heights: 6600 ft.

Transport Winds: W-21

Winds at 2000 ft: WSW-35 4000 ft: W-40 8000 ft: W-44

Sunday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: W-04

Winds at 2000 ft: WNW-17 4000 ft: NW-21 8000 ft: NW-27

NRN SACRAMENTO VALLEY AIR BASIN

Saturday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: NW-11

Winds at 2000 ft: NW-18 4000 ft: NNW-19 8000 ft: W-27

Saturday Afternoon (4 PM)...

Mixing Heights: 5000 ft.

Transport Winds: WNW-17

Winds at 2000 ft: WNW-23 4000 ft: NW-28 8000 ft: W-29

Sunday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: NW-04

Winds at 2000 ft: NW-17 4000 ft: NNW-21 8000 ft: NW-27

SRN SACRAMENTO VALLEY AIR BASIN

Saturday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: WNW-04

Winds at 2000 ft: NW-13 4000 ft: NW-16 8000 ft: WNW-21

Saturday Afternoon (4 PM)...

Mixing Heights: 5500 ft.

Transport Winds: NW-15

Winds at 2000 ft: WNW-19 4000 ft: NW-26 8000 ft: NW-34

Sunday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: WNW-02

Winds at 2000 ft: NNW-14 4000 ft: N-12 8000 ft: NW-16

SAC VALLEY FOOTHILLS AIR BASIN

Saturday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: SW-04

Winds at 2000 ft: W-05 4000 ft: NW-12 8000 ft: W-16

Saturday Afternoon (4 PM)...

Mixing Heights: 4600 ft.

Transport Winds: W-09

Winds at 2000 ft: W-13 4000 ft: W-21 8000 ft: W-28

Sunday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: NE-03

Winds at 2000 ft: NNW-18 4000 ft: NNW-19 8000 ft: NW-24

MOUNTAIN COUNTIES AIR BASIN

Saturday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: SW-07

Winds at 2000 ft: SW-23 4000 ft: WSW-27 8000 ft: WSW-40

Saturday Afternoon (4 PM)...

Mixing Heights: 3700 ft.

Transport Winds: SW-13

Winds at 2000 ft: SW-34 4000 ft: SW-38 8000 ft: W-49

Sunday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: SW-04

Winds at 2000 ft: WNW-17 4000 ft: WNW-20 8000 ft: NW-32

LAKE TAHOE AIR BASIN

Saturday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: SW-05

Winds at 2000 ft: SW-23 4000 ft: SW-31 8000 ft: W-48

Saturday Afternoon (4 PM)...

Mixing Heights: 2600 ft.

Transport Winds: WSW-10

Winds at 2000 ft: SW-33 4000 ft: W-36 8000 ft: W-50

Sunday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: WSW-05

Winds at 2000 ft: W-26 4000 ft: W-33 8000 ft: NW-48

LAKE COUNTY AIR BASIN

Saturday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: NW-07

Winds at 2000 ft: N-27 4000 ft: NNW-25 8000 ft: WNW-19

Saturday Afternoon (4 PM)...

Mixing Heights: 1300 ft.

Transport Winds: WNW-14

Winds at 2000 ft: WNW-37 4000 ft: NNW-34 8000 ft: NW-45

Sunday Morning (4 AM)...

Mixing Heights: Under 1000 ft.

Transport Winds: NW-07

Winds at 2000 ft: NNW-24 4000 ft: NW-26 8000 ft: NW-35

SAN FRANCISCO BAY AIR BASIN

Saturday Morning (4 AM)...

Mixing Heights: 1500 ft.

Transport Winds: W-15

Winds at 2000 ft: NW-22 4000 ft: NW-24 8000 ft: W-30

Saturday Afternoon (4 PM)...

Mixing Heights: 1600 ft.

Transport Winds: NW-14

Winds at 2000 ft: NW-24 4000 ft: NW-28 8000 ft: NW-35

Sunday Morning (4 AM)...

Mixing Heights: 1000 ft.

Transport Winds: NW-06

Winds at 2000 ft: NNW-19 4000 ft: NW-24 8000 ft: NNW-33

The outlook for the period Monday through Wednesday...Overall, conditions will remain unstable for good mixing. Transport winds will remain westerly and of light to moderate speeds in the afternoons.

END/B.Belongie