173
FXUS66 KHNX 200436
AFDHNX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HANFORD CA
936 PM PDT TUE MAY 19 2026
KEY MESSAGES
1. LOW RELATIVE HUMIDITIES IN THE LOWER ELEVATIONS OF CENTRAL
CALIFORNIA BRINGS AT LEAST A MODERATE RISK OF FIRE DANGER THIS
WEEK.
2. WARMING TREND CONTINUES FOR THE REMAINDER OF THIS WEEK.
3. PRACTICE SAFETY AROUND AREA LAKES, RIVERS, AND STREAMS AS
WATER IS STILL RUNNING COLD.
DISCUSSION
TODAY'S HIGHS IN THE SAN JOAQUIN VALLEY WERE IN THE UPPER 80'S
TO 90 DEGREES. WINDS WERE ONCE AGAIN MAINLY LIGHT, BUT RELATIVE
HUMIDITY HAS BEEN LOWERING IN THE AFTERNOON. MANY LOCATIONS
LOWERED TO THE TEENS IN THE SJ VALLEY AND INTO THE ADJACENT
FOOTHILLS. THIS CONTINUES A MODERATE RISK OF MORE WILDFIRES
DEVELOPING, SUCH AS GRASS AND BRUSH FIRES. THE WARMING TREND
CONTINUES WEDNESDAY UNTIL FRIDAY. THERE IS A MODERATE TO HIGH
PROBABILITY OF A 95 DEGREE READING, WITH A HIGHER CHANCE ON
THURSDAY (70-80 PERCENT) IN THE SAN JOAQUIN VALLEY. READINGS OF
90 DEGREES OR WARMER HAVE A MODERATE PROBABILITY (40-50 PERCENT)
IN THE KERN COUNTY DESERT. HIGH PRESSURE WILL CONTINUE TO BUILD
OVER THE REGION THROUGH LATE THIS WEEK.
HIGH TEMPERATURES IN THE WEEKEND CONTINUE TO HAVE A MODERATE TO
HIGH CHANCE TO REACH INTO THE 90S IN MANY OF THE LOWER ELEVATION
LOCATIONS AS THE RIDGE OF HIGH PRESSURE PERSISTS INTO SATURDAY.
ALTHOUGH, FORECAST HIGHS MODERATE SLIGHTLY SUNDAY THROUGH NEXT
TUESDAY. THERE IS AN UPPER-LEVEL TROUGH THAT WILL GRADUALLY MOVE
SOUTHWARD FROM THE PACIFIC NORTHWEST LATE MONDAY INTO NEXT
TUESDAY. HOWEVER, MOISTURE PASSES MAINLY TO OUR NORTH WITH THIS
FEATURE. FOR NOW, WE ARE STILL LOOKING AT A DRY FORECAST FOR
THE NEXT SEVERAL DAYS.
AVIATION
VFR CONDITIONS WILL PREVAIL FOR THE NEXT 24 HOURS.
FIRE WEATHER
LOW RELATIVE HUMIDITY VALUES CONTINUE THROUGHOUT THE SAN JOAQUIN
VALLEY, THE ADJACENT COASTAL RANGES, LOWER SIERRA NEVADA
FOOTHILLS, AND THE KERN COUNTY MOUNTAINS AND DESERT FOR THE
REMAINDER OF THIS WEEK. MINIMUM HUMIDITY IN MOST AREAS WILL
FALL BELOW 15 PERCENT EACH DAY. THE PREDOMINANT THREATS FOR FIRE
WEATHER WILL BE RAPIDLY DEVELOPING AND SPREADING GRASS AND
BRUSH FIRES. WINDS WILL GENERALLY REMAIN LIGHT THROUGH THE
PERIOD. HOWEVER, WITH THE WARMING TREND WILL COME LOWER
HUMIDITY, AND THERE WILL ALSO BE POOR TO MODERATE OVERNIGHT
HUMIDITY RECOVERY.
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.
BSO
WEATHER.GOV/HANFORD
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