San Diego's Weather Forecast for August 4, 2022: Flash Flood Watch due to monsoon storms

Posted at 5:20 AM, Aug 04, 2022
and last updated 2022-08-04 19:43:46-04

The abrupt increase in monsoonal flow covered the county with clouds this afternoon and helped cooled things off by a few degrees.

The mountains and deserts are under a Flood Watch with a portion under a Flood Advisory, both expiring at 10P.

The rapid influx of moisture could lead to heavy scattered thunderstorm activity in our mountains this evening. Storms could produce up to an 1" of rain per hour potentially leading to localized flooding. Instability could also lead to gusty winds and hail.

We'll continue to trend near average for daytime highs for the rest of the week, but high humidity levels thanks to monsoonal flow will make conditions muggy and uncomfortable.

Unfortunately, our nights won't have a ton of relief. Overnight lows will struggle to get below 70 with most areas dropping in the upper 60s west of the mountains, and low 80s in the deserts.

Monsoonal flow backs off a bit Friday through Saturday, then another surge filters in Sunday, ramping up the chances for widespread scattered shower activity.

As we track the monsoon stay with the Pinpoint Weather Team for updates on how far west the surge will move each day.

Friday's Highs:
Coast: 74-79°
Inland: 82-93°
Mountains: 85-93°
Deserts: 104-109°

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