Issued Zones: Santa Barbara Southern Coast … Ventura, Los Angeles, Orange, San Diego County … Western Imperial County … The Inland Empire … Antelope Valley to Metro High Desert … Western Morongo Basin, including JTNP … The Coachella Valley to Desert Center … San Bernardino/Riverside Mountains …
Site: Southern California Weather Force has issued a Flood Warning and Advisory effective now through Thursday evening …
Date: 2/13/19 at 10:05am PT
Forecast: A very strong low-level jet will up the precipitation risk across the flood zones starting early Thursday morning. This will increase as the day moves along with additional strong low-level jet influences coming in along with a strong tropical moisture plume.
This plume will impact between 4 am Thursday morning and around 4 pm Thursday early evening. This will be a very dangerous flood event in a short period of time and as I stated in previous articles… you should have prepared and made your plans well in advance.
Less accumulation is expected in the LA Basin, SCV, Ventura County, and Santa Barbara areas due to being on the western edge of the main moisture plume. You can get away with 1-2″ of rainfall from this event. Same can be said for the rest of the advisory areas, the exception in Palm Springs you could exceed 3 inches.
Widespread 3-6″ rainfall marks will be expected in the warning area, especially Orange, The Inland Empire, and the San Diego zones. Over 7+ inches will be expected on the south and western slopes of the San Bernardino, Riverside, and San Diego Mountains as well.
Heavy rainfall is expected to bring flood yet again as far as the Morongo Valley areas and even the Western Imperial County zones.
Damaging winds are expected with 40-45 mph wind gusts as an average for the region on Thursday and 60-80 mph gusts in the mountain regions, with 60 mph expected in the Cajon Pass. Downed poles and trees are likely once again so be cautious out there.
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10-mile rule: These alerts issued on this site means that within your zone and 10 miles from you will see the event forecast for. You may or may not see the event but it means you are in the zone or 10 miles from where someone will.