Thunderstorm Wind, San Bernardino
- When
- September 1, 5:35 PM PST to 5:36 PM PST
- Where
- San Bernardino County, Hesperia
- Measured
- 50 kt (58 mph)
- Property damage
- $30,000
- Reported by
- TRAINED SPOTTER
- Coordinates
- 34.417, -117.300
Damaging Wind in California, September 1, 2002
Power poles blown down near Interstate 15.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- $30,000
- 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.
Power poles blown down near Interstate 15.
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, 1:30 PM PST, 4 hours 5 minutes earlier.
Area forecast discussion, Sep 1, 1:30 PM PST, 4 hours 5 minutes before
EXTREME SOUTHWESTERN CALIFORNIA AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN DIEGO CA 230 PM PDT SUN SEP 1 2002 .SYNOPSIS...MOISTURE FROM GENEVIEVE WILL PRODUCE SOME THUNDERSTORMS IN THE SAN BERNARDINO MOUNTAINS AND DESERTS THIS EVENING. HIGH PRESSURE WILL BRING NEAR RECORD HIGH TEMPERATURES TO SOME AREAS INLAND FROM THE BEACHES THROUGH LABOR DAY. DEVELOPING LOW PRESSURE ALOFT WILL COOL OFF THE REGION TUESDAY THROUGH FRIDAY. MOISTURE FROM HURRICANE HERNAN WILL BRING MORE MOISTURE WEDNESDAY THROUGH FRIDAY AND A CHANCE OF SHOWERS AND THUNDERSTORMS MAINLY TO THE MOUNTAINS. DRIER WEATHER IS EXPECTED NEXT WEEKEND. .DISCUSSION...TSTORMS IN SBD MTNS AND DESERT FOOTHILLS TODAY...BUT VERY SMALL RAINFALL AMOUNTS. A FEW LIGHT SHOWERS OR SPRINKLES WERE NOTED IN NRN OR CO AND NRN INLAND EMPIRE. LOTS OF CU BUILDUPS OVER RIV AND SAN CO MTNS...BUT INHIBITED BY A CAP...SO FEW IF ANY TSTORMS THERE. ENORMOUS FIRE SE OF ENSENADA SPREAD A SHEET OF SMOKE ACROSS SD CO THIS AM BUT HAS DISSIPATED SOME. HOT AIR PRODUCED BY LOTS OF SUBSIDENCE AND WEAK ONSHORE GRADIENTS...ONLY 2 MB SAN-IPL. SOME RECORDS WILL GO DOWN TODAY AND MON. MARINE LAYER CLOUDS A DISTANT MEMORY AND MAY NOT SEE MUCH INTO DISTANT FUTURE...BUT ADDED A TOKEN MENTION OF FOG AT CST FOR MON NIGHT. PROGS SHOWING SOME DECREASE IN GENEVIEVE MOISTURE MON-TUE... BUT MORE COPIOUS HERNAN MOISTURE ARRIVES WED-FRI AS AN UPPER TROUGH AMPLIFIES ALONG W CST AND DRAWS THE MOISTURE UP. HAVE INTRODUCED LOW TO MED POPS FOR WED-FRI IN SEVERAL ZONES. TEMPS WILL GRADUALLY LOWER SEVERAL DEGREES EACH DAY TUE-FRI...MAYBE EVEN BELOW NORMAL BY FRI. GFS MODEL PREVIOUSLY BUILT A ROBUST RIDGE OVER THE SW U.S. OVER THE WEEKEND...BUT LATEST 12Z VERSION IS NOT NEARLY AS STRONG WITH IT. AT ANY RATE...DRIER AND A BIT WARMER WX EXPECTED OVER WEEKEND. .SAN...HAZARDOUS WEATHER OUTLOOK...SEE LAXSPSSGX. MM
In the hours before
Special weather statement, Sep 1, 3:45 PM PST, 1 hour 50 minutes before
CAZ042-043-048-050-055>058-060>062-021200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN DIEGO CA 445 PM PDT SUN SEP 1 2002 ...HOT WEATHER THROUGH LABOR DAY... STRONG HIGH PRESSURE WILL CONTINUE ACROSS SOUTHWEST CALIFORNIA THROUGH LABOR DAY WITH NEAR RECORD HIGH TEMPERATURES IN SOME AREAS. TEMPERATURES OVER THE INLAND AREAS OF THE COASTAL PLAIN WILL BE IN THE 90S. TEMPERATURES IN THE LOWER COASTAL FOOTHILLS AND WARMER VALLEY AREAS WILL BE 100 TO 108. RECORD HIGH TEMPERATURES WILL BE REACHED AT A FEW LOCATIONS. DESERT TEMPERATURES WILL BE 102 TO 112. HIGH PRESSURE WILL WEAKEN A LITTLE ON LABOR DAY AS A SLOW COOLING TREND DEVELOPS...AND MORE SIGNIFICANT COOLING IS EXPECTED TUESDAY INTO THE LATTER HALF OF THE WEEK. PEOPLE IN INLAND AREAS SHOULD AVOID STRENUOUS OUTDOOR ACTIVITY DURING THE DAY. DRINK PLENTY OF WATER AND AVOID ALCOHOLIC BEVERAGES. WEAR LIGHTWEIGHT AND LIGHT COLORED CLOTHING. NEVER LEAVE CHILDREN OR PETS IN CLOSED AUTOMOBILES...TEMPERATURES CAN QUICKLY RISE TO DANGEROUS LEVELS. WHITLOW
The radar
The Santa Ana Mts radar (KSOX), 73 km away, was scanning. The volume nearest the first event began at 01:33 UTC.
Event by event
1 thunderstorm wind. Local standard time, as filed.
What these are
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Wildfire in California, September 1 to 12, 2002
- Drought in Kentucky, September 1 to 30, 2002
- Drought in Illinois, September 1 to 30, 2002
- Drought in Indiana, September 1 to 30, 2002
- Heat in California, September 1, 2002
- Rip Current in Alabama, September 1, 2002
- Rip Current in Florida, September 1, 2002
- Wildfire in Colorado, September 1 to 12, 2002
- Flash Flood in Wisconsin, September 1, 2002
- Damaging Winds in Minnesota, September 1, 2002
- Drought in West Virginia, September 1 to 25, 2002
- Hail and Damaging Wind in Minnesota, September 1, 2002
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: 5316327.