San Diego's Weather Forecast for Wednesday, December 22, 2021: Heavy Rain Thu. Night into Friday

Posted at 8:10 AM, Dec 22, 2021
and last updated 2021-12-22 21:02:50-05

Heavy flooding rain is on the way, and it will begin after midnight on Thursday. 

The first of two storms will arrive Thursday afternoon with widespread showers, rain become heavier with flooding potential into early Friday morning. We have a slight chance for some showers to to develop overnight, but the chances are about 10-15% .

Flood Watch goes into effect for the entire county at 7pm Thursday through Friday at noon.

The first storm brings the best chance for heavy rain with impressive accumulations. It will be a warm ahead of the storms, so snow levels will stay above 7,000 feet through Friday. 

Possible Rain Totals Thursday into Friday: 
 Coast/Inland: 1.0-2.2" 
 Mountains: 1.5- 4" 

The winds will become gusty on Thursday and Friday with the strongest gusts Friday morning reaching up to 65 mph in the mountains. The rest of the county will experience winds between 20-35 mph, including the coast, valleys, and deserts.

Another storm system arrives Christmas day into Sunday. The rain will be lighter with this system, it will be colder. Snow levels will drop to about 4,500 to 5,000 feet, but we are not looking at significant snow for the weekend.

Christmas through Monday Rain totals: 
 Coast/Inland: 0.25 - 0.40" 
 Mountains: 0.5 - 1" 
 Deserts: T - 0.10"

Rain will taper off on Sunday and Monday, but cool conditions will remain all next week with daytime highs averaging 10 to 15 degrees below normal. 

The cool and unsettled will continue with more rain showers possible on Tuesday and Wednesday. 

We will wrap up the year with above normal rainfall, but the main concern will be the potential for flooding overnight Thursday into early Friday.

Thursday's Highs:
Coast: 62-67°
Inland: 62-67°
Mountains: 54-61°
Deserts: 69-77°

Follow ABC 10News Meteorologist Angelica Campos on Facebook & Instagram @Camposcrusher and Twitter @10NewsCampos