California, 2003

Heat in California, June 25 to 29, 2003

June 25 to 29, 2003 · NWS HNX · 4 events in 4 counties and zones

Like the first part of the month, June ended with a persistent warm spell where high temperatures in the Central and Southern San Joaquin Valley were consistently 100 degrees F. or above for a stretch of 5 days.

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
4

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS HNX wrote it up.

Like the first part of the month, June ended with a persistent warm spell where high temperatures in the Central and Southern San Joaquin Valley were consistently 100 degrees F. or above for a stretch of 5 days.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Hanford, CA wrote its last area forecast discussion before the first event at Jun 25, 1:53 PM PST, 1 hour 7 minutes earlier.

Area forecast discussion, Jun 25, 1:53 PM PST, 1 hour 7 minutes before
INTERIOR CENTRAL CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HANFORD CA
222 PM PDT WED JUN 25 2003

LOTS OF SUNSHINE IN THE CENTRAL CALIFORNIA INTERIOR WITH FEW CUMULUS
BUILDING UPS IN THE SIERRA. TEMPERATURES HAVE MOVED INTO NORMAL
LEVELS TODAY WITH 24 HOUR TRENDS 8-12 DEGREES HIGHER THAN YESTERDAY.
THE COMBINATION OF HIGH PRESSURE BUILDING INTO THE AREA AND OFFSHORE
WIND FLOW WILL CONTINUE TO PROVIDE ABOVE NORMAL TEMPERATURES INTO
THE WEEKEND. HIGH PRESSURE ALOFT IN THE EASTERN PACIFIC WILL BRIDGE
WITH ANOTHER HIGH OVER OLD MEXICO BY THURSDAY. SKIES WILL TURN HAZY
AS A MID LEVEL INVERSION FORMS DUE TO INCREASE SUBSIDENCE. WIND WILL
BEGIN TO TURN ONSHORE LATER FRIDAY AS THE UPPER RIDGE AXIS SHIFTS
WESTWARD ALONG THE COAST. HOWEVER NO SIGNIFICANT COOLING EXPECTED
THROUGH SATURDAY SINCE THE ONSHORE FLOW WILL BE WEAK.

FOR SUNDAY THROUGH WEDNESDAY...THE UPPER RIDGE WILL CONTINUE TO BE
SUPPRESSED AS AN UPPER TROUGH MOVES EAST FROM THE GULF OF ALASKA.
MODELS SHOW SOME DISAGREEMENT WITH THE MOVEMENT AND DEVELOPMENT OF
THE SYSTEM. AS PER HPC GUIDANCE...THE WEAKER AND MORE PROGRESSIVE
ECMWF SOLUTION IS FAVORED. LOWER HEIGHTS AND THICKNESSES OVER
CENTRAL CALIFORNIA WILL BRING DECREASED TEMPERATURES FOR EARLY NEXT
WEEK...EXPECT TEMPS TO TREND BACK DOWN NEAR NORMAL BY SUNDAY AND
CONTINUE NEAR SEASONAL VALUES THROUGH MIDWEEK. WITH LITTLE AVAILABLE
MOISTURE...NO MOUNTAIN CONVECTION IS FORESEEN THROUGH THE PERIOD AND
SKIES SHOULD CONTINUE GENERALLY CLEAR.

.HNX...NONE.

MV/JEB
Hazardous weather outlook, Jun 25, 4:30 AM PST, 10 hours 30 minutes before
CAZ089>099-261230-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HANFORD CA
530 AM PDT WED JUN 25 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE CENTRAL CALIFORNIA
INTERIOR.

.DAY ONE...TODAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS TO THEIR LOCAL NATIONAL WEATHER SERVICE OFFICE.

Event by event

4 heat. Local standard time, as filed.

Heat, E Central S.J. Valley

When
June 25, 3:00 PM PST to June 29, 6:00 PM PST
Where
E Central S.J. Valley forecast zone
Reported by
OFFICIAL NWS OBS.

Heat, Se S.J. Valley

When
June 25, 3:00 PM PST to June 29, 6:00 PM PST
Where
Se S.J. Valley forecast zone
Reported by
OFFICIAL NWS OBS.

Heat, W Central S.J. Valley

When
June 25, 3:00 PM PST to June 29, 6:00 PM PST
Where
W Central S.J. Valley forecast zone
Reported by
OFFICIAL NWS OBS.

Heat, Sw S.J. Valley

When
June 25, 3:00 PM PST to June 29, 6:00 PM PST
Where
Sw S.J. Valley forecast zone
Reported by
AWOS,ASOS,MESONET,ETC

What these are

Heat
Heat below excessive heat criteria that still caused deaths, injuries or significant impacts.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in California in 2003Every state in 2003This day in weather historyWarnings in California, June 2003

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5359491, 5359492, 5359493, 5359494.