Marine Weather and Tide Forecast for Tupman, CA

KEY MESSAGES

1. A Fire Weather Watch has been issued for the San Joaquin Valley, the West Side Hills and the Sierra Nevada foothills from 11 AM through 11 PM Thursday. This is due to expected winds of 15 to 20 mph, gusting up to 25 to 35 mph, and minimum relative humidities of 5 to 15% in the afternoon.

2. Above average temperatures continue today and will warm through the week. Moderate Heat Risk is expected on Wednesday across the San Joaquin Valley on Wednesday.

3. There is a 50 to 80 percent chance for wind gusts greater than 50 mph in the Mojave Desert Slopes on Thursday. A Wind Advisory has been issued for the area from 5 PM Thursday through 11 PM Friday.

DISCUSSION
A small trough is expected to pass through Northern California tomorrow morning, which will lead to increased winds in the Valley and Desert Slopes down in our CWA Ahead of this trough is a slight ridging pattern that will cause temperatures this afternoon to be above normal for this time of year. Highs in the Valley are likely to reach the mid 90's with triple digits not likely to occur.

Along with these temperatures is lowered afternoon relative humidity, which when combined with the increased winds, will lead to increased fire danger tomorrow. A Fire Weather Watch has been issued from 11 AM through 11 PM Thursday. There will also be strong winds along the Mojave Desert Slopes during the passage of this trough, with sustained winds of 20 to 30 mph and gusts up to 50 mph. A Wind Advisory has been issued for the time period of 5 PM Thursday through 11 PM Friday, though the strongest winds are expected in the afternoon both days.

After the passage of the trough on Thursday, weather conditions are expected to calm, though afternoon RH's are expected to remain low throughout the period. Temperatures are expected to remain fairly consistent as well, with a slight warm up on Sunday with the passage of a small ridge.


AVIATION
18Z Update:

VFR conditions will prevail for the next 24 hours across the Central California Interior.

AIR QUALITY ISSUES
ISSUED: 05/20/2025 14:55 EXPIRES: 05/21/2025 23:59 None.

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
Wind Advisory from 5 PM Thursday to 11 PM PDT Friday for CAZ338.
Fire Weather Watch from Thursday morning through Thursday evening for CAZ579-580-590-591.