####018001516#### FNUS21 KWNS 170813 FWDDY1 Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0213 AM CST Tue Dec 17 2024 Valid 171200Z - 181200Z ...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF LOS ANGELES AND VENTURA COUNTIES IN SOUTHERN CALIFORNIA... ...Synopsis... Quasi-zonal mid-level flow is expected to quickly amplify as ridging develops over the western US today and tonight. Surface high pressure will quickly build over the Great Basin as a cold front moves eastward across the central US. The high pressure will allow for moderate offshore winds and a much drier air mass to move into portions of southern CA. The strong winds and low humidity will support elevated to critical fire-weather concerns over portions of southern CA. ...Southern California... Offshore winds are expected to develop this afternoon and intensify this evening, as high pressure builds over the Great Basin. Northeast surface winds of 25-35 mph are likely through the Santa Clara River Valley and Oxnard Plain by late this evening and into early D2/Wed. The intensifying downslope winds and the arrival of drier air overnight should allow for several hours of 10-15% RH across southern California. The overlap of low RH and strong winds should support several hours of elevated to critical fire-weather conditions across parts of Los Angeles and Ventura Counties. ..Lyons.. 12/17/2024 ...Please see www.spc.noaa.gov/fire for graphic product... $$