1 high wind, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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.
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 21, 3:30 AM PST, 4 hours earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN DIEGO CA 430 AM PDT TUE SEP 21 2004 .SYNOPSIS...SURFACE HIGH PRESSURE PRESSURE OVER THE GREAT BASIN WILL BRING GUSTY SANTA ANA WINDS AT TIMES THROUGH WEDNESDAY AND A WARMING TREND THROUGH THURSDAY. WEAK ONSHORE FLOW WILL BRING A COOLING TREND BEGINNING AT THE COAST FRIDAY AND SPREADING INLAND OVER THE WEEKEND. FALL BEGINS WEDNESDAY AT 930 AM. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES. GUSTY SANTA WINDS WILL INCREASE IN STRENGTH AND COVERAGE THIS MORNING AND CONTINUE AT TIMES INTO WEDNESDAY AFTERNOON. WIND ADIVSORIES HAVE BEEN EXPANDED TO INCLUDE THE SAN DIEGO COUNTY MOUNTAINS AND VALLEYS AND THE SANTA ANA MOUNTAINS AND FOOTHILLS IN ADDITION TO THE INLAND EMPIRE. ITS POSSIBLE SOME GUSTS IN THE HIGH WIND RANGE COULD OCCUR IN THE WINDIER LOCATIONS THIS MORNING. RECENT ACARS SOUNDINGS SHOW A STRONG SUBSIDENCE INVERSION AROUND 700 MB...FAVORABLE FOR MOUNTAIN WAVE DEVELOPMENT IN THE LEE OF THE MOUNTAINS AND ASSOCIATED LOCAL STRONG WIND GUSTS. ACARS SOUNDINGS FROM ONTARIO ALSO SHOW WINDS UP TO 40 KT IN THE LOWEST 5000 FEET. THESE SHOULD BEGIN TO MIX DOWN AFTER SUNRISE. SURFACE AND UPPER SUPPORT FOR SANTA ANA WINDS IS STRONGEST TODAY...BUT MAY STILL BE SUFFICIENT TO LOCALLY MEET WIND ADVISORY CRITERIA AGAIN WEDNESDAY MORNING. THE SANTA ANA WINDS SHOULD BRING SIGNIFICANT WARMING NEAR THE COAST TODAY WITH LESSER WARMING AS ONE GOES FARTHER INLAND AS LOW LEVEL COLD ADVECTION MODERATES THE WARMING. MOST AREAS WILL SEE ADDITIONAL WARMING FOR WEDNESDAY AND THURSDAY. SOME COOLING SHOULD BEGIN TO SPREAD INLAND FROM THE COAST FRIDAY AND SATURDAY AS WEAK ONSHORE FLOW RETURNS. && .SGX WATCHES/WARNINGS/ADVISORIES... RED FLAG WARNING...SEE LAXRFWSGX. WIND ADVISORY...SEE LAXNPWSGX. HAZARDOUS WEATHER OUTLOOK...SEE LAXHWOSGX. && MARTIN
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN DIEGO CA 545 AM PDT TUE SEP 21 2004 CAZ042-043-221300- ORANGE COUNTY COASTAL AREAS- SAN DIEGO COUNTY COASTAL AREAS- 545 AM PDT TUE SEP 21 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COASTAL ZONES OF EXTREME SOUTHWESTERN CALIFORNIA. .DAY ONE... TODAY THROUGH TONIGHT. A LARGE SOUTH SWELL IS STILL IMPACTING THE COAST. THUS THE RIP CURRENT POTENTIAL IS HIGH FOR ORANGE COUNTY COASTAL AREAS... SAN DIEGO COUNTY COASTAL AREAS... .DAYS TWO THROUGH SEVEN... WEDNESDAY THROUGH MONDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. CAZ048-050-055-056-057-058-221300- SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN DIEGO COUNTY VALLEYS- SAN BERNARDINO COUNTY MOUNTAINS- RIVERSIDE COUNTY MOUNTAINS- SANTA ANA MOUNTAINS AND FOOTHILLS- SAN DIEGO COUNTY MOUNTAINS- 545 AM PDT TUE SEP 21 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MOUNTAINS AND VALLEYS IN EXTREME SOUTHWESTERN CALIFORNIA. .DAY ONE... TODAY THROUGH TONIGHT. SURFACE HIGH PRESSURE OVER THE INTERIOR WILL CAUSE OFFSHORE FLOW WITH LOCAL GUSTY WINDS THROUGH AND BELOW MOUNTAIN CANYONS AND PASSES ALONG WITH WARMER DAYS WEST OF THE MOUNTAINS. THIS WEATHER PATTERN IS PRODUCING THE FOLLOWING HAZARDS... WIND ADVISORY AND RED FLAG WARNING IN EFFECT FOR SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE CA- SAN DIEGO COUNTY VALLEYS CA- SANTA ANA MOUNTAINS AND FOOTHILLS CA- SAN DIEGO COUNTY MOUNTAINS CA- .DAYS TWO THROUGH SEVEN... WEDNESDAY THROUGH MONDAY. POSSIBLE INCREASED FIRE WEATHER HAZARD DUE TO LOW HUMIDITY AND STRONG OR SHIFTING WINDS... MODERATE TO STRONG AND GUSTY WINDS... WEDNESDAY. MACKECHNIE
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
Fremont Canyon RAWS measured sustained winds over 40 mph for 2 hours and gusts over 60 mph for 3 hours. Gusty winds resulted in blown down tree branches all across the inland empire.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2004Every state in 2004This day in weather historyWarnings in California, September 2004
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: 5422704.