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4/2/2025
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Area Forecast Discussion
National Weather Service - San Joaquin Valley / Hanford, CA
Issued: Wednesday, April 2 2025 - 3:28 AM PDT
AVIATION... 12Z Update: Across the San Joaquin Valley and West Side Hills, low VFR prevailing with areas of MVFR in low clouds and showers until 14Z. Clearing likely (60%-80%) across the Valley north of Kern County after 18Z with Kern County clearing after 22Z.
Over the Sierra Nevada, Sierra Foothills and Tehachapi mountains, widespread mountain obscuring IFR in clouds and precipitation thru 00Z Thursday. A slight chance (10%-20%) of afternoon thunderstorms across the foothills and higher elevations of the Sierra Nevada from 18Z Wed to 03Z Thu.
For the Kern County portion of the Mojave Desert, VFR prevailing although surface wind gusts greater than 50 kts are expected in the Mojave Desert Slopes thru 18Z Wednesday.
PREV DISCUSSION... /issued 1034 PM PDT Tue Apr 1 2025/
KEY MESSAGES... * Precipitation will continue to move through the forecast area through tonight, with only eastern Kern County not seeing 100% probability of measurable rainfall. Eastern Kern County probabilities range from 60% over the mountains to 25% along the county line.
* Moderate to heavy snow will occur in the Sierra Nevada through this evening, with total accumulations of 1 to 3 feet of snow in Mariposa, Madera, and Fresno (north of the Kings River) Counties and up to 10 inches in Fresno, south of the Kings River, and Tulare Counties.
* Snow levels will lower today from 6000 feet to 3500 feet this evening, though the majority of the snowfall will occur before the snow levels drop. Light snow accumulations down to 3500 ft will be possible.
* Strong winds will continue through Wednesday morning across the Kern County Mountains and Desert areas. There is an 80% probability of greater than 70 mph maximum gust today for Mojave.
* A warming and drying trend will take place Friday through the weekend with above normal temperatures by Saturday.
AVIATION... 06Z Update: Across the San Joaquin Valley and West Side Hills, VFR prevailing with areas of MVFR in low clouds and showers until 10Z Wednesday. Clearing likely (60%-80%) across the Valley north of Kern County after 16Z Wednesday.
Over the Sierra Nevada, Sierra Foothills and Tehachapi mountains, widespread mountain obscuring IFR in clouds and precipitation thru 00Z Thursday. A slight chance (10%-20%) of afternoon thunderstorms across the foothills and higher elevations of the Sierra Nevada from 18Z Wed to 03Z Thu.
For the Kern County portion of the Mojave Desert, VFR prevailing although surface wind gusts greater than 50 kts are expected in the Mojave Desert Slopes thru 12Z Wednesday.
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.
CERTAINTY...
The level of certainty for days 1 and 2 is medium. 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... High Wind Warning until 5 AM PDT early this morning for CAZ338. Wind Advisory until 5 AM PDT early this morning for CAZ337-339. Winter Storm Warning until 5 AM PDT early this morning for CAZ323-326-327. Winter Weather Advisory until 5 AM PDT early this morning for CAZ328>331.
