1 hail, 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 Los Angeles, CA wrote its last area forecast discussion before the first event at Apr 5, 1:30 AM PST, 4 hours 45 minutes earlier.
SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA 230 AM PDT THU APR 5 2001 ETA RUN IS A LITTLE SHARPER AND A LITTLE WETTER THAN AVN. WILL LEAN TO AVN AS SPECTRAL MODELS HAVE BEEN MUCH BETTER THAN GRIDPOINT MODELS THIS WINTER. WILL ADJUST CLOUDS TODAY FROM PARTLY TO MOSTLY BASED ON LARGE AREAS OF CLOUDS MOVING INTO AREA FROM THE SOUTH. MODELS WANT TO KEEP MOST OF ACTION TO THE SOUTH WHICH MAKES SENSE BASED ON VORT MAXES SWING AROUND THE BASE OF THE LOW AS IT MOVES SOUTHWARD. REAL WORRY IS FROM INSTABILTIY NOT DYNAMICS AND FEEL 30 PERCENT SHRA/TSRA CHANCE LOOKS GOOD AS COLD CORE MOVES OVERHEAD TODAY AND INTERACTS WITH LOW LEVEL MOISTURE WHICH IS ALREADY IN PLACE. BUT WILL NOT BUMP UP POPS BASED ON INCREASED CLOUD COVER. WITH SOUTHERN ARC OF STORM TRAJECTORY FEEL L.A. COUNTY WILL HAVE BEST AND VENTURA COUNTY THE WORST CHANCE FOR RAIN AND WILL SHADE POPS IN THAT DIRECTION. THE BEAREST WISP OF A RIDGE SETS UP FRIDAY BUT IT HARDLY IMPEDES NEXT SYSTEMS PROGRESS AT ALL AND RAIN CHANCE WILL MOVE INTO CENTRAL COAST DURING THE AFTERNOON. RAIN CHANCE WILL WORK ITS WAY DOWN THE COAST THROUGH FRIDAY NIGHT GIVING BEST RAIN CHANCE FOR L.A. EARLY SATURDAY MORNING. MOISTURE DRIES OUT DURING THE DAY SATURDAY AND SEEMS TO LAST INTO MONDAY BUT TROFING REMAINS SO CANNOT EXCLUDE RAIN CHANCE. RAIN CHANCE INCREASES AGAIN MONDAY AS LOW CORE MOVES INTO SOUTHERN CALIFORNIA. NEW MRF BACKS OFF ON WEDNESDAY RAIN SO SCALED BACK. LAX 320. RORKE. .LAX...NONE.
The national radar mosaic for the moment the first event began.
1 hail. Local standard time, as filed.
An isolated thunderstorm generated one-quarter inch hail that accumulated up to one inch along Bates Road near the border of Santa Barbara and Ventura counties. Twenty vehicles were damaged and one person was injured.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2001Every state in 2001This day in weather historyWarnings in California, April 2001
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: 5237280.