San Diego's Weather Forecast for Mon. Aug. 30, 2021: Thunderstorms and Some Heavy Rain

Posted at 7:11 AM, Aug 30, 2021
and last updated 2021-08-30 20:30:58-04

Monsoonal thunderstorms could bring some pockets of heavy rain through Tuesday evening.

A flash flood watch is in effect for the mountains and deserts until 9pm Tuesday. Showers and thunderstorms could produce heavy rain at times with rainfall rates of 1-2" per hour, rain like that can easy create flash flooding. Thunderstorms could also produce gusty winds. The best chance for storms will be in the afternoon and evening, with a 20% chance for showers in the valleys and coastal communities.

We'll begin to shift to drier conditions on Wednesday, as monsoonal moisture goes back east. We'll enjoy drier conditions through the end of the week, with cooler daytime highs inland and over the mountains in the low 80s, seasonal near the coast with mid 70s, and low 100s for the deserts. Conditions will be comfortable through Friday, then a gradual warm up will begin over the weekend as temperatures go up a few degrees about 3 to 4 on average.

The marine layer will bring low level clouds and patchy fog, along with westerly winds through the end of the week.

We could monitor another surge of monsoonal moisture for Labor day, please stay tune. In the meantime, be safe on the roads and make sure your headlights are on anytime there is rainfall.

Tuesday's Highs:
Coast: 74-79º
Inland: 78-86º
Mountains: 80-89º
Deserts: 100-105º

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