Marine Weather and Tide Forecast for Trona, 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.

DISCUSSION
Zonal flow with slight ridging continues to influence the region, with temperatures rising into the mid 90's in the San Joaquin Valley by Wednesday, and winds continuing to be slightly elevated in the afternoons. A small trough is expected to come into Northern California on Thursday, which will cause increased winds for Central California. The Mojave Desert Slopes are likely to see strong winds again on that day, with chances for 50 mph gusts at 50 to 80 percent.

Another trough is expected to come through the region Friday, with this one crossing the whole of Central California rather than Northern California. This trough is expected to bring slightly cooler temperatures that are closer to normal.
Something to keep in mind that even though we may still see troughs drop down from the north, as the seasons transition into summer, those trough will be weaker than ones seen in the winter, so their effects on temperature and moisture will be lessened while retaining their ability to cause elevated winds.
Moving into the weekend, temperatures are expected to be fairly steady, with a slight warm up on Sunday due to a small ridge that will quickly pass through the region before highs come down again on Monday.


AVIATION
00Z Update:

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

FIRE WEATHER
A Fire Weather Watch has been issued for the San Joaquin Valley, the West Side Hills and the Sierra Nevada Foothills due to increased winds of 15 to 20 mph, with gusts of 25 to 35 mph, as well as minimum relative humidities of 5 to 15 percent in the afternoon. This Watch is valid from 11 AM through 11 PM on Thursday, May 22nd.

A small trough passing through Northern California on Thursday will lead to these increased winds, and the dry air from these winds will lead to decreasing RH's in the afternoon. RH recovery will be fair in the Valley and Foothills with values of 45 to 55 percent overnight. The West Side Hills may see a weaker recovery with maximum RH values of 30 to 40 percent.

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
Fire Weather Watch from Thursday morning through Thursday evening for CAZ579-580-590-591.