630
FXUS66 KHNX 200450
AFDHNX

Area Forecast Discussion
National Weather Service Hanford CA
950 PM PDT Sat Sep 19 2026


&&

.KEY MESSAGES...
1. Minor Heat Risk through Tuesday as temperatures remain at
or below seasonal normal values.

2. A warming trend in temperatures starts on Wednesday as the
region will see the return of heat during the latter part of the
period. Thursday looks to be the hottest day with a greater
than 70% chance of a Moderate Heat Risk. Friday also keeps a
40 to 60% chance of a Moderate Heat Risk.

3. A disturbance will cross the region on Monday and Tuesday
with a slight chance of showers and thunderstorms across the
Sierra Nevada Monday afternoon.

&&

.DISCUSSION...
A weak ridge of high pressure is sliding across our area
bringing warmer temperatures through Sunday. Sunday has a 60 to
65 percent chance of highs of at least 90 in the Valley except
for Merced at 25 percent. A trough slides in Monday bringing
slightly cooler temperatures but also a 5 to 15 percent chance
of thunderstorms over the Sierra Nevada and foothills. However,
precipitation chances will be at 5 to 10 percent for any
accumulation in the Valley for Monday.


Temperatures begin to rebound Wednesday into the rest of the
week as the trough slides out of the area. The ridge that has
been dominating in the South will slowly retrograde west which
will help keep things dry and fuel the warming trend. Moderate
Heat Risk is likely Thursday and Friday. as there is a 20 to 35
percent chance of triple digits on Thursday and 15 to 25 percent
on Friday. The CPC continues to show a 40 to 50 percent chance
of above average temperatures in the 6-10 and 8-14 day outlooks.


&&


.AVIATION...
MVFR with local IFR conditions will exist across the Sierra
Nevada and adjacent foothills as smoke from the Dome Fire in
Yosemite continues through 08Z Sunday. After 08Z, MVFR visibility in
the vicinity of the Dome Fire. Otherwise, VFR conditions prevailing
for the next 24 hours.

&&

.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.

&&

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

$$

JPK

weather.gov/hanford