361
FXUS66 KHNX 220530
AFDHNX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HANFORD CA
1030 PM PDT THU MAY 21 2026
KEY MESSAGES
1. LOW RELATIVE HUMIDITIES IN THE LOWER ELEVATIONS OF CENTRAL
CALIFORNIA BRINGS AT LEAST A MODERATE RISK OF FIRE DANGER
THROUGH THIS WEEKEND.
2. WARMING TREND CONTINUES UNTIL SATURDAY, WITH A LOWERING
TREND SUNDAY INTO NEXT WEEK.
3. PRACTICE SAFETY AROUND AREA LAKES, RIVERS, AND STREAMS AS
WATER IS STILL RUNNING COLD.
DISCUSSION
HIGH PRESSURE RIDGE REMAINS IN CONTROL OF THE WEST COAST AS
TEMPERATURES CONTINUE THEIR WARMING TREND THROUGH THE END OF
THE WEEK. ALONG WITH DRY CONDITIONS, MAX TEMPERATURES ARE NOW
REACHING INTO THE 90S WITH PROBABILITY OF EXCEEDANCE (POE) IN
THE 80-90 PERCENT OF HAVING MAX VALUES IN THE UPPER 90S BY
FRIDAY. BY SATURDAY, POE OF REACHING 95 DEGREES IS ONLY AT 50%
ACROSS THE SAN JOAQUIN VALLEY. AT THAT POINT, POE WILL CONTINUE
TO DROP AS PERCENTAGE VALUES REACHING 20-30 PERCENT ACROSS THE
SAN JOAQUIN VALLEY ON SUNDAY. MONDAY WILL CONTINUE THE COOLING
TREND AS POE OF REACHING 90 DEGREES FALLS BELOW 10 PERCENT
ACROSS THE SAN JOAQUIN VALLEY. BY MEMORIAL DAY, MAX TEMPERATURES
WILL HIT THE UPPER 80S AS ONLY A FEW SPOTS REACH 90. LITTLE
RECOVERY WILL BE SEEN UNTIL THE MIDDLE OF NEXT WEEK.
THE RIDGE PATTERN IS EXPECTED TO BREAK-DOWN BY THE END OF THE
WEEK WITH THE WESTERLIES DOMINATING THE WEST COAST. WHILE THE
BULK OF THE ENERGY FROM THE BREAK-DOWN OF THE RIDGE WILL RESIDE
OVER THE PACIFIC NORTHWEST AND INTER-MOUNTAIN REGION, ENOUGH
ENERGY WILL SHIFT SOUTH AS REFLECTED IN THE COOLING TEMPERATURES
AND THE INCREASED ONSHORE WIND FLOW DURING THE WEEKEND AND
EARLY NEXT WEEK. ENSEMBLE SURFACE WIND ANALYSIS IS INDICATING
WINDY CONDITIONS OVER THE RIDGES OF THE COASTAL RANGE AS COOL
AIR SURGES INTO THE CENTRAL VALLEY THIS WEEKEND. DURING THAT
TIME FRAME, POE OF REACHING 35 MPH WILL RANGE FROM 20-40 PERCENT
THIS WEEKEND. AT THE SAME TIME, VERY SLIGHT CHANCES (5-10
PERCENT) OF PRECIPITATION WILL BE CONFINED TO THE HIGHEST POINTS
OF THE SIERRA NEVADA RANGE.
AVIATION
VFR CONDITIONS WILL PREVAIL 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.
PUBLIC/AVIATION....MOLINA
WEATHER.GOV/HANFORD
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