California, 2002

Heat in California, September 1, 2002

September 1, 2002 · NWS SGX · 1 event in 1 county or zone

A hiker succumbed to heat exhaustion in Modjeska Canyon. Temperatures in the area were 109 degrees Fahrenheit.

Where it happened

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The toll

Deaths
1
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
1

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 SGX wrote it up.

A hiker succumbed to heat exhaustion in Modjeska Canyon. Temperatures in the area were 109 degrees Fahrenheit.

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 San Diego, CA wrote its last area forecast discussion before the first event at Sep 1, 2:10 AM PST, 7 hours 50 minutes earlier.

Area forecast discussion, Sep 1, 2:10 AM PST, 7 hours 50 minutes before
EXTREME SOUTHWESTERN CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
310 AM PDT SUN SEP 1 2002

.SYNOPSIS...HIGH PRESSURE WILL BRING NEAR RECORD HIGH TEMPERATURES
TO SOME AREAS INLAND FROM THE BEACHES THROUGH LABOR DAY. A
DEVELOPING UPPER TROUGH OF LOW PRESSURE WILL BRING A LITTLE COOLING
TUESDAY...WITH GREATER COOLING FOR WEDNESDAY AND THURSDAY. THE MAIN
AXIS OF MOISTURE FROM GENEVIEVE HAS MOVED NORTHWARD...BUT ENOUGH
MOISTURE MAY REMAIN FOR AN ISOLATED THUNDERSTORM THIS AFTERNOON OVER
THE SAN BERNARDINO COUNTY MOUNTAINS AND DESERTS.

.DISCUSSION...AXIS OF MSTR FM THE REMNANTS OF GENEVIEVE HAS MOVED
SLOWLY NORTHWARD DURG THE PAST 24 HOURS...NOW CNTRD ACROSS LOS
ANGELES COUNTY WITH MDLS CONTINUING TO MOVE THE AXIS SLOWLY
NORTHWARD DURG THE NEXT 24 HOURS. A LONE THUNDERSTORM POPPED UP OVR
THE EASTERN SAN GABRIEL MTNS AROUND 1 AM. INTERESTINGLY...THE WSETA
SHOWED AN SMALL ISOLATED AREA OF PRECIP OVR THE ERN LOS ANGELES
COUNTY MTNS AT 06Z. THE WSETA SHOWS SOME PRECIP THIS AFTERNOON OVR
THE SDB AND ERN LOS ANGELES COUNTY MTNS. HAVE INTRODUCED A SLIGHT
CHANCE OF THUNDERSTORMS TODAY TO THE SDB/RIV COUNTY MTNS AND
DOWNSTREAM DESERT AREAS IN SBD COUNTY.

TEMPERATURES...MOST OF SRN CA XCP FOR THE BEACHES WILL CONTINUE TO
BAKE IN THE AFTERNOONS THRU LABOR DAY. A DEVELOPING UPR TROUGH OF
LOW PRESSURE WL BRING A LTL COOLING FOR TUE...WITH GREATER COOLING
WED AND THU. RETURN OF WK ONSHR FLOW AND SHALLOW MARINE INVERSION
COULD RESULT IN DENSE FOG NR THE CST LATE MON NIGHT AND EARLY TUE.
THERE IS ALSO THE POTENTIAL FOR THIS UPR TROUGH TO DRAW A
SIGNIFICANT AMOUNT OF MSTR FM POWERFUL HURRICANE HERNAN
NORTHEASTWARD ACROSS THE AREA THU AND FRI. WORDING FOR THESE DAYS
HAS BEEN ADJUSTED TO MOSTLY CLOUDY. IF CURRENT MDL TRENDS
CONTINUE...A CHANCE OF SHOWERS MAY NEED TO BE ADDED FOR THESE DAYS.
THUNDERSTORMS ARE NOT OUT OF THE QUESTION FOR WED AS MSTR BEGINS TO
INCR...BUT NOT ENOUGH TO REDUCE HEATING. PER COORDINATION WITH
LOX...WL HOLD OFF ON ANY MENTION OF PRECIPITATION IN THE EXTENDED
FOR NOW.

.SAN...HAZARDOUS WEATHER OUTLOOK...SEE LAXSPSSGX.

MARTIN

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

1 heat. Local standard time, as filed.

Heat, Ne Orange

When
September 1, 10:00 AM PST to 5:00 PM PST
Where
Ne Orange forecast zone
Deaths
1 direct, 0 indirect
Reported by
NEWSPAPER
Coordinates
33.483, -116.847 (the zone’s center; the record gives no point)

The people who died

As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.

EventDateAgeSexWhereKind
Heat, Ne Orange2002-09-0138MaleOutside/Open AreasDirect

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 2002Every state in 2002This day in weather historyWarnings in California, September 2002

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: 5316467.