San Diego's Weather Forecast for March 21, 2023: Scattered Showers and Thunder Possible

Posted at 5:39 AM, Mar 21, 2023
and last updated 2023-03-22 02:28:40-04

Flooding potential will continue with powerful winds, rain and thunderstorms will be possible into Wednesday with snow in our mountains as colder air spreads around the county.

Today's atmospheric river is the third of the month, and twelfth of the season. It will shift east, making the storm weaker. Showers and thunderstorms will be possible, but the threat will be more scattered in nature.

Strong powerful winds will continue impacting our mountains and deserts through mid-day Wednesday.

High Wind Warning in effect for the deserts until noon Wednesday with southwesterly winds of 30 to 50mph and gusts to 85mph. High surf will be elevated through Thursday, and snow levels will lower overnight be impacting our mountains also through Thursday morning.

On-and-off rain will continue through Wednesday with isolated thunderstorms, capable of producing heavy rain. Light rain will linger through Thursday morning.

A Flood Watch is in effect until 9pm Wednesday; remember if you see flooded roadways turn around, don't drown.

Coast and valleys: 1 - 3"
Mountains: 2 - 5", see below for snow forecast
Deserts: .25 - .75"
Current rainfall totals

Today will mostly bring rain as snow levels will be high, above 6,000', but tonight into Wednesday snow levels will drop between 4,500' and 5,000'. A Winter Weather Advisory will be in effect from 6pm today until 10pm Wednesday where we expect 2 to 9" and locally up to a foot of wet snow; this includes Mt. Laguna, Palomar Mountain and Lookout Mountain while Julian is expected to just see rain if any snow falls it will be a very wet snow.

A High Surf Advisory will be in effect from 2am Wednesday until 9pm Thursday for waves of 4 to 9 feet and sets up to 12 feet along with dangerous rip currents. Remember you should avoid going in the water due to bacteria runoff from the rain until 72 hours after the rain.

We dry out during the day on Thursday with sunshine returning Friday into the weekend with minor warming; low to mid-60s for the coast and valleys, low-50s in the mountains, and 70s in the deserts.

Wednesday's Highs: 
Coast: 55-59°
Inland: 48-57°
Mountains: 40-48°
Deserts: 62-67°

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