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Forecast Discussion for San Diego, CA
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769 FXUS66 KSGX 051152 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 352 AM PST Tue Nov 5 2024 .SYNOPSIS... Dry weather will continue through the weekend. Warmer inland today, then much cooler inland for Wednesday into Thursday with periods of strong and gusty north to northeast Santa Ana winds for late tonight into Thursday. Gradually warmer with weaker winds for Friday through the weekend with a return of night and morning coastal low clouds and fog during the weekend. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... .SHORT TERM (Today through Thursday)... Warmer inland today with weaker winds with high temperatures for coastal areas a few degrees cooler. A low pressure system moving southeastward from the Pacific Northwest into the Great Basin will bring gusty west winds to high desert areas for late this afternoon into this evening with the stronger gusts to around 40 mph. The lower level flow will turn offshore late tonight with offshore flow continuing into Thursday afternoon. Gusty north to northeast winds will strengthen for late tonight into Wednesday with the strongest gusts along and below the coastal slopes of San Bernardino County mountains to 50 mph and along and below the coastal slopes of the Santa Ana Mountains to 60 mph. The winds will become more northeasterly for Wednesday night and Thursday with the winds expanding into San Diego County with gusts to 45 mph for the mountains and inland valleys in San Diego County with locally gusty east to northeast winds extending to near the coast for Wednesday night. The winds will subside during Thursday afternoon. High temperatures for Wednesday will be much cooler for inland areas, as much as 15 to 20 degrees cooler than today for the high desert with high temperatures for the high desert mostly in the 50s. Northern areas will begin to warm on Thursday with San Diego County a few degrees cooler. && .LONG TERM (Friday through Monday)... The warming trend will continue into Saturday with high temperatures mostly within a few degrees of average, around 80 in the lower deserts and in the mid 70s to around 80 for the Inland Empire. Not much change is expected for Sunday with cooling beginning to spread inland on Monday as onshore flow strengthens. && .AVIATION... 051030Z...Clear skies with unrestricted VIS today and tonight. Northeast winds to develop after 10Z Wednesday, strongest in foothills and in the corridor from Cajon Pass to central Orange County. Initially, some LLWS will occur overnight before winds begin to surface around sunrise Wednesday. && .MARINE... East-northeast winds will develop Wednesday morning and continue through at least Thursday morning, with occasional gusts exceeding 20 knots. Otherwise, no hazardous marine conditions are expected through Saturday. && .FIRE WEATHER... Onshore flow will begin to strengthen late today, then become offshore late tonight with strengthening north to northeast winds for late tonight into Wednesday with gusts to 50 mph along and below the coastal slopes of the San Bernardino County mountains into the Inland Empire, and to 60 mph along and below the coastal slopes of the Santa Ana Mountains into inland Orange County. The winds will become more northeasterly and expand into San Diego County for Wednesday night into Thursday with gusts to 45 mph for the mountains and inland valleys. Gusts to 35 mph could locally extend to near the coast at times for Wednesday night. Lowest humidity will fall to 10 to 15 percent on Wednesday and around 10 percent on Thursday with poor recovery to 20 to 30 percent for Wednesday night. For Friday into the weekend, there will be weaker winds with a gradual warming trend and recovery in humidity with higher humidity for coastal areas spreading inland over the weekend into Monday. && .SKYWARN... Skywarn activation is not requested. However weather spotters are encouraged to report significant weather conditions. && .SGX WATCHES/WARNINGS/ADVISORIES... CA...Red Flag Warning from 4 AM Wednesday to 6 PM PST Thursday for Orange County Inland Areas-San Bernardino County Mountains- Including The Mountain Top And Front Country Ranger Districts Of The San Bernardino National Forest-San Bernardino and Riverside County Valleys -The Inland Empire- Santa Ana Mountains-Including The Trabuco Ranger District of the Cleveland National Forest. High Wind Watch from Wednesday evening through Thursday afternoon for Orange County Inland Areas-San Bernardino County Mountains-San Bernardino and Riverside County Valleys-The Inland Empire-Santa Ana Mountains and Foothills. Fire Weather Watch from Wednesday evening through Thursday afternoon for Riverside County Mountains-Including The San Jacinto Ranger District Of The San Bernardino National Forest-San Diego County Inland Valleys-San Diego County Mountains-Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest. PZ...None. && $$ PUBLIC/FIRE WEATHER...17 AVIATION/MARINE...MM |
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NWS San Diego, CA (SGX) Office Forecast Discussions.
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