696
FXUS66 KHNX 091818
AFDHNX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HANFORD CA
1018 AM PST TUE DEC 9 2025
KEY MESSAGES
1. FOG AND LOW CLOUDS WILL CONTINUE EACH NIGHT AND MORNING ACROSS
THE SAN JOAQUIN VALLEY THIS WEEK. DENSE FOG WILL ALSO DEVELOP
AT TIMES IN THE LOWER SIERRA FOOTHILLS, COASTAL RANGES, AND THE
GRAPEVINE.
2. A GRADUAL WARMING TREND WILL OCCUR ACROSS THE MOUNTAINS AND
DESERT THIS WEEK, AS THE HIGH PRESSURE PATTERN CONTINUES OVER
THE REGION.
DISCUSSION
CENTRAL CALIFORNIA SAW VERY LITTLE CHANGE IN THE LAST 24 HOURS
AS LOW CLOUDS COVERED THE SAN JOAQUIN VALLEY. THE STAGNANT
WEATHER PATTERN IS STILL IN PLACE OVER THE SOUTHWEST AS THE
REGION REMAINS DRY. WHILE OUTSIDE OF THE SAN JOAQUIN VALLEY,
TEMPERATURES ACROSS THE MOUNTAINS AND KERN DESERT HAVE SEEN A
SLOW RISE CONDITIONS WARM UNDER THE RIDGE OF HIGH PRESSURE. OVER
THE NEXT 2 TO 3 DAYS, PROBABILITY OF SEASONAL NORMAL VALUES
ACROSS THE VALLEY STRUGGLE TO REACH ANY PERCENTAGE HIGHER THAN
20 PERCENT. ON THE CONTRARY, OUTSIDE OF THE SAN JOAQUIN VALLEY,
THE PROBABILITY OF REACHING 65 DEGREES FOR ELEVATIONS BELOW
6,000 FEET SITS BETWEEN 60 AND 90 PERCENT. WITH THESE HIGH
PERCENTAGE VALUE SHOWING UP FOR MUCH OF THE WEEK, WILL EXPECT
LITTLE CHANGE IN THE STRATUS PLAGUING THE SAN JOAQUIN VALLEY.
IN THE REALM OF PRECIPITATION, ENSEMBLE MOISTURE ANALYSIS IS
SHOWING THE BLOCKING HIGH MAINTAINING ITS POSITION OVER THE
EASTERN PACIFIC, AND PLACING THE STEERING CURRENT IN THE
DIRECTION OF THE PACIFIC NORTHWEST. WITH LITTLE CHANGE IN THE
NEXT 5 DAY, CENTRAL CALIFORNIA WILL REMAIN DRY AND COVERED IN
LOW CLOUDS. LONGER RANGE ENSEMBLE ANALYSIS DOES SHOW A CHANGE IN
THE PATTERN WITH A HINT TOWARD THE INTRODUCTION OF PRECIPITATION
AS EARLY AS NEXT TUESDAY (16 DEC 2025). ENSEMBLE ANALYSIS STILL
HINTS TOWARD PRECIPITATION AROUND THE MIDDLE TO LATE NEXT WEEK.
YET, UNCERTAINTY IS STILL TOO HIGH ON THE ACTUAL MAGNITUDE OF
THE NEXT STORM. FURTHER ANALYSIS IS NEEDED TO GAUGE THE NEXT
STORM POTENTIAL.
AVIATION
IFR TO MVFR CEILINGS AND VISIBILITIES ARE EXPECTED TO PREVAIL
FOR MUCH OF THE SAN JOAQUIN VALLEY DURING THE NEXT 24 HOURS.
LIFR CONDITIONS WILL ALSO PERSIST IN THE COASTAL RANGES, SIERRA
FOOTHILLS, AND THE KERN COUNTY MOUNTAINS DUE TO THE LOW STRATUS
DECK. OTHERWISE, VFR CONDITIONS WILL PREVAIL IN THE SIERRA
NEVADA AND IN THE KERN COUNTY MOUNTAIN AND DESERT AREAS OVER
THE NEXT 24 HOURS.
AIR QUALITY ISSUES
ON TUESDAY DECEMBER 9 2025, UNHEALTHY FOR SENSITIVE GROUPS IN
FRESNO AND KERN COUNTIES. FIREPLACE/WOOD STOVE BURNING STATUS
IS: NO BURNING FOR ALL IN FRESNO AND KERN COUNTIES. NO BURNING
UNLESS REGISTERED IN KINGS, MADERA, MERCED, AND TULARE COUNTIES.
BURNING DISCOURAGED IN KERN (GREATER FRAZIER PARK AREA) AND
SEQUOIA NATIONAL PARK AND FOREST.
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
DENSE FOG ADVISORY UNTIL 11 AM PST THIS MORNING FOR CAZ300-304-
308-313-316>322-334>336.
PUBLIC/AVIATION....MOLINA
WEATHER.GOV/HANFORD
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