Heavy Snow, Mono
- When
- March 9, 5:40 AM PST to 9:40 AM PST
- Where
- Mono forecast zone
- Reported by
- TRAINED SPOTTER
- Coordinates
- 37.939, -118.887 (the zone’s center; the record gives no point)
Heavy Snow in California, March 9, 2001
Spotter in Mammoth Lakes reported 4 inches of snow in 4 hours.
Where it happened
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.
- 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
- 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 REV wrote it up.
Spotter in Mammoth Lakes reported 4 inches of snow in 4 hours.
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 Reno, NV wrote its last area forecast discussion before the first event at Mar 9, 4:00 AM PST, 1 hour 40 minutes earlier.
Area forecast discussion, Mar 9, 4:00 AM PST, 1 hour 40 minutes before
WESTERN NEVADA AND EASTERN CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
400 AM PST FRI MAR 9 2001
MODELS SIMILAR MOVING UPPER LOW S FROM CENTRAL OREGON THIS MORNING
TO A POSITION W OF LAKE TAHOE BY THIS AFTERNOON. CLOUDS AND SHOWERS
FORECAST TO INCREASE OVER AREAS S OF I80 LATER THIS MORNING WITH
SNOW LEVEL DROPPING TO AROUND 4500-5000 FEET. QFFS RANGING FROM
A HALF AND INCH TO AN INCH OF WATER EQUIVALENT IN SIERRA FROM TAHOE
S INTO MONO COUNTY BY 12Z SATURDAY. WILL ISSUE SNOW ADVISORIES FOR
TAHOE AREA TODAY AND MONO COUNTY THIS AFTERNOON AND TONIGHT FOR UP
TO 8 INCHES IN TAHOE AREA AND 10 INCHES IN MONO COUNTY ABOVE 7K FEET
NEXT 24 HOURS. LOW LEVEL CONVERGENCE AND INSTABILITY OVER MINERAL
COUNTY THIS AFTERNOON FOR PSBL TSTMS EMBEDDED WITHIN PCPN BAND.
CLEARING FROM N TONIGHT WITH LINGERING SNOW SHOWERS MAINLY S OF RENO
SAT MRNG WITH WRAP AROUND MSTR. DRY WITH WARMING TREND SUNDAY INTO
WEDNESDAY. MRF BRINGS ANOTHER NEG TILT TROUGH OUT OF GULF OF ALASKA
AFFECTING NRN NV AND SIERRA BY THURSDAY. OTHER MEDIUM RANGE MODELS
LEANING IN THIS DIRECTIONS AND SUPPORTED BY LONG WAVE LENGTH AND
TELECONNECTIONS. CYLKE
.REV...SNOW ADVISORY TODAY LAKE TAHOE AREA CAZ072...NVZ002.
.SNOW ADVISORY THIS AFTERNOON AND TONIGHT MONO COUNTY
CAZ073.The radar
The national radar mosaic for the moment the first event began.
Event by event
1 heavy snow. Local standard time, as filed.
What these are
- Heavy Snow
- Snowfall reaching the local warning threshold without the other hazards of a winter storm.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Heavy Snow in Massachusetts, March 9 to 10, 2001
- Heavy Snow in Connecticut, March 9 to 10, 2001
- Heavy Snow in New Hampshire, March 9 to 10, 2001
- Heavy Snow in Rhode Island, March 9 to 10, 2001
- Damaging Wind in Louisiana, March 9, 2001
- Winter Storm in New York, March 9 to 10, 2001
- Winter Weather in Vermont, March 9 to 10, 2001
- Winter Weather in New York, March 9 to 10, 2001
- Heavy Snow in New York, March 9, 2001
- Damaging Wind in Louisiana, March 9, 2001
- Damaging Wind in Louisiana, March 9, 2001
- Winter Storm in Vermont, March 9 to 10, 2001
More
Every storm in California in 2001Every state in 2001This day in weather historyWarnings in California, March 2001
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: 5238849.