760
FXUS66 KHNX 062025
AFDHNX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HANFORD CA
125 PM PDT WED MAY 6 2026
KEY MESSAGES
1. LESS THAN A 10 PERCENT CHANCE OF LINGERING THUNDERSTORMS WILL
EXIST ACROSS THE SIERRA NEVADA CREST TODAY.
2. WARMING TREND WEDNESDAY INTO THE WEEKEND WITH HIGH
CONFIDENCE OF AT LEAST MODERATE HEAT RISK IN THE VALLEY SUNDAY
THROUGH TUESDAY.
3. MODERATE CHANCE FOR HIGH HEAT RISK IN THE SAN JOAQUIN VALLEY
AREAS.
DISCUSSION
CLEAR CONDITIONS ARE DEVELOPING ACROSS CENTRAL CALIFORNIA TODAY
THAT WILL CONTINUE INTO THE WEEKEND AND EARLY NEXT WEEK AS A
HIGH PRESSURE RIDGE GRADUALLY BUILDS IN OVER THE AREA. SLIGHT
AMOUNTS OF MOISTURE TRACKING OVER THE SIERRA CRESTS HAVE
POTENTIAL TO DEVELOP THUNDERSTORMS DURING THE AFTERNOONS THROUGH
FRIDAY, HOWEVER DAILY CHANCES ARE GENERALLY LESS THAN 10
PERCENT. A WARMING TREND WILL BEGIN TODAY, WITH AFTERNOON
TEMPERATURES NEAR SEASON AVERAGES IN THE SAN JOAQUIN VALLEY
BEFORE WARMING TO TEN DEGREES ABOVE AVERAGE BY THE WEEKEND. THE
PEAK IN HEAT IS EXPECTED TO OCCUR MONDAY AND TUESDAY OF NEXT
WEEK ACROSS THE VALLEY AREAS. ON MONDAY, THERE IS A 50 TO 60
PERCENT PROBABILITY FOR MAXIMUM TEMPERATURES TO EXCEED 100
DEGREES, WITH GREATER PROBABILITIES OF 70 TO 80 PERCENT IN THE
WESTERN VALLEY AREAS. HOWEVER, THESE GREATER PROBABILITIES
EXTEND TO THE ENTIRE SAN JOAQUIN VALLEY ON TUESDAY. THESE
TEMPERATURES BRING A 90 PERCENT PROBABILITY FOR A MODERATE RISK
(LEVEL 3 OF 5) OF HEAT-RELATED ILLNESSES ON TUESDAY, THOUGH
THERE IS UPWARDS OF A 60 PERCENT PROBABILITY IN FRESNO FOR HIGH
RISK (LEVEL 4 OF 5).
AVIATION
VFR CONDITIONS WILL PREVAIL FOR THE NEXT 24 HOURS OVER CENTRAL
CALIFORNIA.
FIRE WEATHER
WARMING TEMPERATURES RISING ABOVE 100 DEGREES EARLY NEXT WEEK
WILL RESULT IN LOWERING RELATIVE HUMIDITIES ACROSS THE REGION.
FOR MONDAY AND TUESDAY, MINRHS IN THE MOJAVE DESERT ARE
EXPECTED TO FALL TO 5 TO 10 PERCENT, WITH VALLEY AND MOUNTAIN
RHS BETWEEN 15 AND 20 PERCENT. A DROP IN 100- AND 1000-HR FUEL
MOISTURE WILL FOLLOW, THOUGH WILL REMAIN ABOVE CRITICAL FIRE
WEATHER TERRITORY. ADDITIONALLY, SUBSIDENCE FROM THE HIGH
PRESSURE RIDGE WILL KEEP WINDS RELATIVELY LIGHT ACROSS THE
REGION.
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...MCCOY
AVIATION....BB
WEATHER.GOV/HANFORD
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