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Rain, cool weather ahead for the weekend

A chance for thunderstorms and rain moves in today across the valley and mountain, picking up into Sunday.

Posted: May 24, 2019 7:27 AM
Updated: May 24, 2019 7:27 AM

Happy Friday to you! We're starting the morning out mostly clear and not too cold in the valley areas.

BUT, plan on a chance for scattered rain showers and thunderstorms mainly in the mountains and foothills today and Saturday as one low pressure system moves east and another drops in to take its place.

Heavy rain is possible, with more widespread showers or thunderstorms on Sunday and Sunday night with snow higher Sierra elevations.

Afternoon mountain showers continuing through mid week.

Low pressure is shifting mainly south and east so we'll start the day with dry conditions and fair skies most locations.

A low pressure system dropping southward into the Pacific Northwest this afternoon will bring instability and a threat of showers or thunderstorms this afternoon and evening.

Most of this activity will be over the mountains but some shower activity may slip into the valley areas.

We're talking about a tenth of an inch or so today and into tomorrow, but possible thunderstorms could bring heavier rainfall - by Sunday, some areas could see more than an inch total

Daytime highs today should come in similar to Thursday which is near or a little below normal for this time of year.

On Saturday the Pacific Northwest trough drops south, so the biggest chance of showers or thunderstorms will be over the eastern half of the forecast area.

Rain should be light but heavier showers are possible.

We'll see cooler air between storms bringing us to below normal temperatures.

A stronger low pressure system is forecast to drop southward down the Pacific Northwest coast and into northwest California on Sunday.

Showers and thunderstorms will again be likely but over the entire area this time.

This system will usher in still cooler air with daytime highs down to 10-15 degrees below normal.

Snow levels will likely drop to below pass levels with enough snowfall forecast over the Sierra passes to bring travel impacts right in the middle of the coming Memorial day weekend.

The upper low shifts eastward into the Great Basin on Monday.

This will shift the shower threat back eastward by Monday afternoon so main shower activity will be over the mountains.

By the afternoon, snow levels should be above pass levels with daytime highs climbing a bit although remaining below normal.

Unsettled pattern continues through the period as ensembles support troughing across the area.

Chances for showers or thunderstorms expected over higher terrain throughout the week, mainly in the afternoon and early evening hours.

Elsewhere, dry conditions are expected. Temperatures will be on the rise through the period with Valley highs in the upper 70s to low 80s Tuesday, reaching into the mid and upper 80s by late next week.

California Coronavirus Cases

Data is updated nightly.

Confirmed Cases: 318761

Reported Deaths: 7027
CountyConfirmedDeaths
Los Angeles1303943795
Riverside24765537
Orange23901421
San Diego19371422
San Bernardino18912304
Fresno790687
Imperial7827135
Alameda7725148
Kern633997
San Joaquin627968
Santa Clara5983166
Tulare5678152
Sacramento533981
Stanislaus463351
Contra Costa460589
San Francisco442650
Ventura424653
San Mateo3949112
Santa Barbara393131
Marin343430
Kings289839
Monterey254018
Solano207528
Merced188412
Sonoma165014
Placer105511
San Luis Obispo9054
Madera8938
Yolo83928
Santa Cruz5683
Napa4774
Sutter3724
Butte3384
San Benito3362
El Dorado3070
Lassen2750
Shasta1876
Yuba1803
Humboldt1654
Glenn1640
Nevada1631
Colusa1130
Mendocino1130
Lake1081
Tehama1041
Calaveras670
Tuolumne640
Del Norte600
Mono501
Siskiyou410
Amador400
Inyo341
Mariposa311
Plumas170
Alpine20
Trinity20
Sierra10
Unassigned00
Chico
Clear
70° wxIcon
Hi: 104° Lo: 67°
Feels Like: 70°
Oroville
Clear
72° wxIcon
Hi: 105° Lo: 68°
Feels Like: 72°
Paradise
Clear
70° wxIcon
Hi: 97° Lo: 68°
Feels Like: 70°
Chester
Clear
43° wxIcon
Hi: 87° Lo: 56°
Feels Like: 43°
Red Bluff
Clear
70° wxIcon
Hi: 105° Lo: 71°
Feels Like: 70°
Willows
Clear
70° wxIcon
Hi: 107° Lo: 65°
Feels Like: 70°
There is a Red Flag Warning in Modoc county today and tomorrow with temperatures getting as hot as 110 degrees for some in the Valley by Wednesday.
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