INTERAGENCY FIRE WEATHER CENTER PREDICTIVE SERVICES UNIT

 

FRIDAY, MAY 26, 2017

SOUTHERN CALIFORNIA GEOGRAPHICAL AREA COORDINATION CENTER

RIVERSIDE, CALIFORNIA

***Strong westerly winds over the mountains and deserts through tonight***

 

A Pacific trough will continue to bring westerly winds of 20 to 30 mph with gusts to 50 mph to the wind prone mountain and desert areas through tonight. The trough will also maintain below normal temperatures and minimum humidity above 30% away from the deserts today. Maximum temperatures will be in the upper 50s and 60s across the mountains and 70s to low 80s in the valleys today. A ridge of high pressure will build into California from the southwest bringing significant warming and drying to the region Saturday through Monday. Temperatures will warm into the low to mid 90s and minimum humidity will drop into the teens and twenties Sunday and Monday. Winds will be light Saturday through Monday. A Pacific trough will drop down the West Coast bringing significant cooling and higher humidity to the area Tuesday through Thursday. Strong and gusty westerly winds will surface across the mountain ridges and desert passes Tuesday afternoon through the middle of next week. Isolated afternoon showers and thunderstorms will be possible over the Sierra next Wednesday and Thursday.

 

Cool and humid conditions away from the deserts will cause there to be little or no fire activity today. Warming and drying will bring an increase in initial attack activity across elevations below 3,000 feet Saturday through Monday. Moderate initial attack activity will be likely Sunday and Monday, which will be the warmest and driest days of the week. Even though winds will be light this Memorial Day weekend, there will be a slightly elevated risk for large fire across the lower elevations during the afternoon hours Sunday and Monday. Rapid rates of spread and long range spotting will be possible in the afternoons where fuels and topography are favorably aligned. IA activity will decrease Tuesday through Thursday as temperatures cool and humidity increases.

 

For additional fuel and weather information, including the Santa Ana Wildfire Threat Index, please visit:

 

http://gacc.nifc.gov/oscc/predictive/weather/index.htm