Includes Eastern Mariposa and Madera Counties and Yosemite National Park
September 21, 2023 - National Weather Service Hanford Office reports a few strong thunderstorms are possible in the Sierra Nevada north of Tulare County from 2:00 P.M. this afternoon until 7:00 P.M. this evening.
Dangerous cloud to ground lightning strikes, small hail, and localized flooding are hazards associated with strong thunderstorms.
Area Forecast Discussion
National Weather Service Hanford CA
1237 AM PDT Thu Sep 21 2023
.SYNOPSIS...
A few strong thunderstorms are possible in the Sierra Nevada north
of Tulare County this afternoon into this evening. Robust,
southwest wind gusts are expected in the Kern County desert this
afternoon and this evening. A few showers are possible in and
around Yosemite National Park early next week. Temperatures will
remain below seasonal values through at least the next seven days.
&&
.DISCUSSION...
A cold front will move southward across Central California today.
A few strong thunderstorms are possible ahead of this cold front
in the Sierra Nevada north of Tulare County this afternoon into
this evening. Robust, southwest wind gusts are anticipated in the
Kern County desert this afternoon and this evening ahead of this
cold front. A Wind Advisory is in effect. High temperatures in the
San Joaquin Valley this afternoon will be around ten degrees below
normal for this time of year. Here are probabilities of maximum
temperatures of 82 degrees or lower for select locations in the
San Joaquin Valley on Thursday, September 21st, 2023:
Delano - 69%
Porterville - 64%
Reedley - 64%
Fresno - 59%
Visalia - 54%
A low amplitude ridge of high pressure will move eastward over the
Western United States Friday. This ridge of high pressure will
strengthen over the Central United States this weekend. A trough
of low pressure may approach the service area early next week.
&&
.AVIATION...
MVFR or lower conditions are likely in and near isolated showers
and thunderstorms in the Sierra Nevada from 21Z this afternoon
until 02Z this evening. Otherwise, VFR conditions will prevail
across the rest of Central California.
&&
.AIR QUALITY ISSUES...
Please see SFOAQAHNX for an Air Quality Alert
&&
.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 from 2 PM this afternoon to 11 PM PDT this evening
for CAZ337>339.
Source: NWS
