Spotters in Mammoth Lakes, Truckee, Tahoe City, Portola, and Yuba Pass in CA reported 4-9 inches of snow in 4 hours.
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 episode as NWS REV wrote it up.
Spotters in Mammoth Lakes, Truckee, Tahoe City, Portola, and Yuba Pass in CA reported 4-9 inches of snow in 4 hours.
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 Reno, NV wrote its last area forecast discussion before the first event at Apr 6, 7:55 PM PST, 1 hour 5 minutes earlier.
WESTERN NEVADA AND EASTERN CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
855 PM PDT FRI APR 6 2001
VORT MAX OFF THE NORTHERN CA COAST LOOKS TO BE TURNING MORE TO THE
EAST IN LINE WITH PROGS. SNOW HAS RECENTLY INCREASED ON THE SIERRA
AND THE NEW ETA STILL SHOWS INCREASING QPF THROUGH 09 TO 12Z. RECENT
TRENDS AND QPF FROM THE ETA AND OUR LOCAL MESOSCALE MODEL RUNS SHOW
THAT THERE WILL BE ENOUGH SNOW IN NORTHERN ZONE 5/70 FOR A SNOW
ADVISORY. WILL ADD THIS TO THE CURRENT SUITE AND CONTINUE THE OTHER
WARNINGS AND ADVISORIES AS THEY ARE EXCEPT TO LOWER THE WARNING AREA
IN ZONE 71. TROUGH AXIS COMES THROUGH THIS AREA LATE SATURDAY
AFTERNOON OR SATURDAY EVENING AND SNOW WILL DROP OFF TO LIGHT SHOWERS
AFTER IT DOES. SNOW COULD PICK UP AGAIN SUNDAY AFTERNOON AND SUNDAY
NIGHT AS A SHORT WAVE DROPS DOWN FROM THE NORTH BUT ANY ACCUMULATIONS
WILL BE MUCH LOWER THAN TONIGHT AND SATURDAY. COREY
.REV...WINTER STORM WARNING ZONE CAZ071 THRU SATURDAY MORNING.
...WINTER STORM WARNING ABOVE 7000 FEET AND A SNOW ADVISORY AT
LOWER ELEVATIONS OF CAZ073 CAZ072/NVZ02 THROUGH SATURDAY.
...SNOW ADVISORY NORTHERN CAZ070/NVZ005 THRU SATURDAY MORNI?NG.The national radar mosaic for the moment the first event began.
1 heavy snow. Local standard time, as filed.
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 2026-10-01. Each event’s entry at NCEI: 5239125.