Onyx, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

756
FXUS66 KHNX 191737
AFDHNX

Area Forecast Discussion
National Weather Service Hanford CA
1037 AM PDT Thu Mar 19 2026


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.KEY MESSAGES...

1. A warming trend will continue this week with afternoon
temperatures approaching 20 to 25 degrees above average today
through Saturday.

2. Daily and monthly record high maximum temperatures will
continue to be challenged this week.

3. Practice cold water safety, as waterways will be running cold and
fast over the next several days.

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.DISCUSSION...
The strong high pressure ridge will continue to bring record-
breaking temperatures to the region through Saturday. Yesterday
we saw record daily highs across the Valley, as well as record
monthly highs at Fresno, Bakersfield and Merced. Chances for
highs of 95 degrees or higher today and Saturday are 20-40%,
while Friday is slightly higher at 30 to 50%. Thankfully the
ridge will begin to weaken by Saturday afternoon, and zonal flow
is expected to become the dominate pattern by Sunday. This will
lead to a significant cooling of temperatures, though they will
still be 10 to 15 degrees above normal for this time of year,
and thus still a Minor Heat Risk for the Valley and Mojave
Desert.

Looking to the long term forecast, above normal temperatures are
likely to persist as the zonal flow leads back into ridging by
Tuesday next week, though this ridge is expected to be less
intense than the ridge aloft today. Probabilities for 90 degrees
increases for the Valley on Monday and Tuesday with that second
ridge, and then again on Friday and Saturday next week as a
another ridge may build in again. The CPC is also indicating
above normal temperatures for days 6-10 and days 8-14, as well
as below normal precipitation in line with a continued stable
pattern.

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.AVIATION...
VFR conditions are expected for the next 24 hours.

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.FIRE WEATHER...
Warming air temperatures and steady dew point temperatures will
lead to a decrease in minimum relative humidities, especially
for the Mojave Desert, high Sierra, and Coastal Range. This
will coincide with a sharp decrease in 100- and 1000-hr dead
fuel moistures and an increase in ERC in these areas. Rapid
curing of fine fuels will bring about some risk for isolated
grass fires. However, live fuel moisture remains below critical
thresholds and significant wild fire potential remains at
little or no risk.

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.AIR QUALITY ISSUES...
None.


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.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.

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.HNX WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

EW

weather.gov/hanford