While LA and San Diego have both dealt with record rainfall over the last 36 hours, it’s back to winter in the surrounding mountains, all thanks to an unusually late Alaska origin low which has swept directly over Southern California.
Parts of San Diego were under water last night having recorded a 1.63 inches of rain. That’s the greatest amount for the date and month, breaking the previous May record of 1.49 inches set back in 1977. That 1.63 inches of rain is also more than San Diego would typically see in the entire May through October period.
Huntington Beach earlier.

Credit: Louisa Hodge
Los Angeles also set a record with .16 of an inch of rain.
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This view of a flooded San Diego last evening would be an impressive sight even in mid-winter but in mid May? Unprecedented!

Credit: News 10

Credit: NWS San Diego
San Diego rainfall.

Further north and it was equally as wet!

The culprit to all this… a vigorous and unusually cold mid and upper level low.

Credit: AccuWeather Pro

Credit: AccuWeather Pro
Current water vapour view over the Western US.

Visible

Here’s Big Bear this afternoon.

Credit: WeatherBug
Exactly a week ago today!

View from a snowy NWS office in Bellemont (west of Flagstaff) ARIZONA this morning. An impressive 6-9 inches was measured.

Credit: NWS Bellemont

ADOT plows were out working hard on 1-40 in Flagstaff this morning.

An unseasonably cool day.


This system will push into the Plains over the next day or so, increasingly the severe weather potential. Looking for warming and drying out over California.
The CFSv2 weeklies try to bring warmer-than-normal back to California while the chilly Plains holds where rains have been unusually heavy and persistent. Will be interesting to see whether the chill makes it to the East Coast in response to the recurving west pacific typhoons.


More tomorrow including a video!
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