####018001465#### FNUS21 KWNS 180758 FWDDY1 Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0157 AM CST Wed Dec 18 2024 Valid 181200Z - 191200Z ...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF LOS ANGELES AND VENTURA COUNTIES IN SOUTHERN CALIFORNIA... ...Synopsis... Mid-level ridging over the western US is forecast to intensify through the forecast period, as the overall flow pattern amplifies. Surface high pressure over the Great Basin will continue to build, supporting offshore flow across parts of southern CA. Santa Ana winds, in combination with low RH values, should allow for several hours of elevated to critical fire-weather conditions across southern CA. ...Southern CA... High pressure in the Great Basin will drive offshore winds across parts of southern California early this morning, continuing through the afternoon. With the offshore pressure gradient remaining fairly strong (-4 to -6 mb) through the first half of the day, gusts of 40-50 mph through the terrain-favored corridors and on ridge tops are expected. Several hours of critical fire weather conditions are likely across portions of Los Angeles and Ventura Counties, with RH values below 15%. Winds are expected to slowly diminish during the evening and overnight as the pressure gradient weakens into early D2/Thur. ..Lyons.. 12/18/2024 ...Please see www.spc.noaa.gov/fire for graphic product... $$ ####018001116#### FNUS22 KWNS 180759 FWDDY2 Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0158 AM CST Wed Dec 18 2024 Valid 191200Z - 201200Z ...NO CRITICAL AREAS... ...Synopsis... Mid-level ridging over the western US is forecast to move eastward Thursday as the overall upper-air pattern becomes more amplified. At the surface, high pressure over the Great Basin will move into the Rockies. Aside from some residual offshore flow over parts of southern CA, widespread fire-weather concerns are not expected. ...Southern CA... Offshore winds are expected to gradually diminish overnight D1/Wednesday and into early D2/Thursday, as high pressure over the Great Basin shifts eastward. While winds should generally weaken, some lingering, locally elevated fire-weather conditions may continue in the typical Santa Ana mountains/foothills through the afternoon. Limited in spatial coverage and duration, fire-weather concerns are not expected to be widespread. ..Lyons.. 12/18/2024 ...Please see www.spc.noaa.gov/fire for graphic product... $$