textproduct: San Joaquin Valley
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
1. Wind Advisory remains in effect for the Mojave Desert slopes until this evening.
2. Lingering precipitation is expected through this afternoon as the low pressure system continues through the region.
3. Another low pressure system brings chances for precipitation this weekend.
DISCUSSION
Latest radar imagery shows mainly light showers moving across the Sierra Nevada near Yosemite NP as an upper-level low pressure system tracks eastward over Northern CA. Additional showers will continue over the Sierra through this afternoon. There is a 5-15 percent chance for thunderstorms again today, though mainly over Merced and Mariposa Counties. Also, strong, gusty winds will also last until this evening over the Mojave Desert slopes in eastern Kern County with gusts to 45 mph. The chances for gusts this strong are currently are 60-70 percent.
Another low pressure system brings chances for precipitation from Saturday afternoon and evening across the forecast area, but will continue redevelop over the Sierra Nevada on Sunday afternoon and evening. The chances for amounts at least 0.10 inch of precipitation in a 24 hour period from Saturday to Sunday are 15-25 percent over the San Joaquin Valley and 60-70 percent over the Sierra Nevada including from Yosemite to the Lake Isabella area. There is also a slight chance for thunderstorms each afternoon and evening over the Sierra and on Saturday afternoon and evening across the region. A slight chance for precipitation also returns to the Sierra Tuesday until next Wednesday. So, weather for the latter part of April remains unsettled with temperatures at near to below average.
Latest CPC outlooks show near average temperatures while odds for precipitation are tilted towards above average during the last few days of April through the first week of May.
AVIATION
VFR conditions are expected for the next 24 hours in the San Joaquin Valley. Lingering showers over the Sierra Nevada brings mountain obscuring clouds through at least 00Z Thursday.
AIR QUALITY ISSUES
None.
CERTAINTY
The level of certainty for days 1 and 2 is high. The level of certainty for days 3 through 7 is medium.
Certainty levels include low...medium...and high. Please visit www.weather.gov/hnx/certainty.html for additional information and/or to provide feedback.
HNX WATCHES/WARNINGS/ADVISORIES
Wind Advisory until 8 PM PDT this evening for CAZ338.
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