334
FXUS66 KHNX 292311
AFDHNX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HANFORD CA
411 PM PDT MON JUN 29 2026
UPDATE
AVIATION SECTION UPDATED.
KEY MESSAGES
1. DRY AND BREEZY CONDITIONS CREATE ELEVATED FIRE RISK THIS
WEEK, ESPECIALLY IN THE MOJAVE DESERT.
2. SLIGHT CHANCE FOR THUNDERSTORMS THIS AFTERNOON ALONG THE
SIERRA CREST FROM YOSEMITE NP TO SEQUOIA AND KINGS CANYON NP.
3. BELOW NORMAL TEMPERATURES CONTINUE ACROSS THE AREA.
4. PRACTICE SAFETY AROUND LAKES, RIVERS AND STREAMS, AS WATER
IS STILL RUNNING COLD.
DISCUSSION
A TROUGHING PATTERN OVER MUCH OF THE WESTERN UNITED STATES IS
MAINTAINING FROM THE WEEKEND, RESULTING IN CLEAR, DRY
CONDITIONS FOR CENTRAL CALIFORNIA WITH RELATIVELY COOL
TEMPERATURES NEAR SEASON AVERAGES. THIS PATTERN IS EXPECTED TO
CONTINUE FOR MUCH OF THE WORK WEEK, BUT GRADUALLY WEAKENING AS
THE HOLIDAY WEEKEND APPROACHES. AS SUCH, A SLIGHT WARMING TREND
IS EXPECTED LATER THIS WEEK, WITH A 60 TO 70 PERCENT PROBABILITY
FOR MAXIMUM TEMPERATURES TO EXCEED 95 DEGREES ON SATURDAY IN THE
SAN JOAQUIN VALLEY; UNTIL THEN, THERE IS LESS THAN A 20 PERCENT
PROBABILITY FOR THESE HIGHS. HOWEVER, WITH THE PREVAILING FLOW
ENTERING THE REGION FROM THE NORTHWEST, DRIER AIR IS ANTICIPATED
TO CONTINUE, WITH DAILY MINRH VALUES ACROSS THE VALLEY AREAS AT
20 PERCENT OR LESS AND DESERT VALUES BETWEEN 10 AND 15 PERCENT;
MINRHS AT THE HIGHER SIERRA ELEVATIONS WILL ALSO BE AROUND 15 TO
20 PERCENT WITH GREATER RHS IN THE 30S FOR THE FOOTHILLS.
BEFORE GETTING INTO THE REST OF THE WEEK, A SHORTWAVE LOW
PRESSURE SYSTEM IS CURRENTLY BREAKING OFF FROM THE MAIN TROUGH
AND WILL CONTINUE THROUGH CENTRAL CALIFORNIA TODAY. THE
INCREASED DYNAMICS FROM THE SYSTEM AND RELATIVELY STRONGER
MOISTURE INFLUENCE WILL BRING A SLIGHT CHANCE FOR THUNDERSTORMS
ACROSS THE CREST OF THE SIERRA NEVADA THIS AFTERNOON. ANY STORM
THAT MAY DEVELOP CAN CONTAIN CLOUD-TO- GROUND LIGHTNING, GUSTY
AND ERRATIC WINDS, SMALL HAIL, AND INTENSE RAINFALL RATES.
AVIATION
VFR CONDITIONS EXPECTED ACROSS THE AREA FOR THE NEXT 24 HOURS.
10% CHANCE FOR ISOLATED THUNDERSTORMS ACROSS THE SIERRA CREST
UNTIL 4Z 29-JUN (21PDT JUN 28).
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
LAKE WIND ADVISORY UNTIL 11 PM PDT THURSDAY FOR CAZ300.
PUBLIC...MCCOY
AVIATION....ND
WEATHER.GOV/HANFORD
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