Alert archive / California / Winter Storm Warnings in 2012
Winter Storm Warning 7, NWS Reno, NV
NWS Reno, NV issued this winter storm warning at Dec 2, 2012, 9:00 AM PST for 5 counties in California; Douglas County, Washoe County, Nevada. It was in force for 10 hr. 4 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Dec 2, 2012, 9:00 AM PST (17:00 UTC)
- Expired
- Dec 2, 2012, 7:00 PM PST
- In force
- 10 hr
- Issued by
- NWS Reno, NV
Counties Alpine County, CA, El Dorado County, CA, Mono County, CA, Nevada County, CA, Placer County, CA, Douglas County, NV, Washoe County, NV
The radar
The Reno radar (KRGX), 92 km from the middle of the area, began a volume at 17:01 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Dec 2, 11:19 AM PST | SNOW 2 | Kirkwood, CA | AT 7800 FEET RAIN HAS CHANGED TO SNOW WITH 1-2 INCHES SO FAR. |
| Dec 2, 3:15 PM PST | HEAVY SNOW 16 | Kirkwood Ski Area, CA | STORM TOTAL SINCE SATURDAY NIGHT AT 9800 FEET. 6 INCHES NEW SNOW AT 7800 FEET. |
| Dec 2, 3:44 PM PST | HEAVY SNOW 20 | Mount Rose Ski Area, NV | STORM TOTAL 14-20 INCHES SINCE EARLY SUNDAY MORNING. ELEVATION 8260 FT. |
| Dec 2, 5:04 PM PST | SNOW 11 | 2 Wnw Mammoth Lakes, CA | ESTIMATED NEW SNOW SINCE 10 AM AT MAMMOTH MOUNTAIN SESAME SNOW STUDY SITE. ELEVATION 9014 FT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Reno, NV (KREV), launched 12:00Z, 5.0 hours before the alert went out and 166 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1424 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 216 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
377 WWUS45 KREV 021700 WSWREV URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RENO NV 900 AM PST SUN DEC 2 2012 ...HEAVY SNOW TO FALL BEHIND COLD FRONT THIS AFTERNOON... .A STRONG COLD FRONT IS MOVING THROUGH THE SIERRA WITH SNOW LEVELS RAPIDLY FALLING BEHIND THE FRONT. BRIEF HEAVY SNOWFALL IS EXPECTED IN THE SIERRA INTO THIS AFTERNOON BEHIND THE FRONT. MOTORISTS SHOULD BE PREPARED FOR BRIEF WHITEOUT CONDITIONS OVER THE PASSES DUE TO WIND AND SNOW. CAZ072-NVZ002-030000- /O.NEW.KREV.WS.W.0007.121202T1700Z-121203T0000Z/ GREATER LAKE TAHOE AREA- INCLUDING THE CITIES OF...SOUTH LAKE TAHOE...TRUCKEE... INCLINE VILLAGE 900 AM PST SUN DEC 2 2012 ...WINTER STORM WARNING IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW AND GUSTY WINDS...WHICH IS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON. * TIMING: A COLD FRONT WILL DROP SNOW LEVELS BELOW 7000 FEET THIS MORNING WITH PERIODS OF HEAVY SNOW INTO THE AFTERNOON. * SNOW ACCUMULATIONS: 10 TO 16 INCHES ABOVE 7000 FEET WITH 4 TO 8 INCHES AT LAKE LEVEL. ABOVE 8000 FEET...2 FEET OR MORE OF SNOW IS EXPECTED. * SNOW LEVELS: NEAR 8000 FEET THIS MORNING...FALLING BELOW 7000 FEET BY NOON. SNOW LEVEL WILL REACH LAKE LEVEL BY MID-AFTERNOON. * IMPACTS: HEAVY SNOW AND GUSTY WINDS WILL CREATE PERIODS OF WHITEOUT CONDITIONS OVER THE HIGHER PASSES OF THE TAHOE BASIN. MOTORISTS SHOULD EXPECT HAZARDOUS DRIVING CONDITIONS AT TIMES AROUND THE TAHOE BASIN INTO THE AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... CONDITIONS CAN DETERIORATE RAPIDLY DURING WINTER STORMS...SLOW DOWN AND ALLOW EXTRA TIME WHEN TRAVELING. CARRY TIRE CHAINS... FOOD...WATER...BLANKETS AND A FLASHLIGHT IN YOUR CAR IN CASE OF AN EMERGENCY. CHECK OUR WEBSITE AT WEATHER.GOV/RENO OR LISTEN TO NOAA WEATHER RADIO FOR UPDATES ON THIS SITUATION. && $$ CAZ073-030100- /O.NEW.KREV.WS.W.0007.121202T1700Z-121203T0300Z/ MONO- 900 AM PST SUN DEC 2 2012 ...WINTER STORM WARNING IN EFFECT UNTIL 7 PM PST THIS EVENING ABOVE 8000 FEET... THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A WINTER STORM WARNING ABOVE 8000 FEET FOR HEAVY SNOW AND GUSTY WINDS...WHICH IS IN EFFECT UNTIL 7 PM PST THIS EVENING. * TIMING: A STRONG COLD FRONT WILL DROP SNOW LEVELS BELOW 8000 FEET BY NOON WITH PERIODS OF HEAVY SNOW INTO EARLY THIS EVENING. * SNOW ACCUMULATIONS: 10 TO 18 INCHES ABOVE 8000 FEET NEAR AND WEST OF HIGHWAY 395. LIGHTER ACCUMULATIONS OF 4 TO 8 INCHES DOWN TO 7000 FEET. * WINDS: SOUTHWEST 20 TO 30 MPH WITH GUSTS TO 55 MPH. RIDGE GUSTS TO 130 MPH OVER THE SIERRA CREST. * SNOW LEVELS: NEAR 9000 FEET FALLING BELOW 8000 FEET BY NOON. SNOW LEVELS WILL CONTINUE TO FALL TO NEAR 6500 FEET BY EARLY EVENING. * IMPACTS: HEAVY SNOW AND GUSTY WINDS WILL CREATE PERIODS OF WHITEOUT CONDITIONS IN THE HIGH ELEVATIONS OF MONO COUNTY. MOTORISTS SHOULD EXPECT HAZARDOUS DRIVING CONDITIONS OVER THE HIGHER PASSES OF HIGHWAY 395 AS WELL AS NEAR THE TOWN OF MAMMOTH LAKES. PRECAUTIONARY/PREPAREDNESS ACTIONS... CONDITIONS CAN DETERIORATE RAPIDLY DURING WINTER STORMS...SLOW DOWN AND ALLOW EXTRA TIME WHEN TRAVELING. CARRY TIRE CHAINS... FOOD...WATER...BLANKETS AND A FLASHLIGHT IN YOUR CAR IN CASE OF AN EMERGENCY. CHECK OUR WEBSITE AT WEATHER.GOV/RENO OR LISTEN TO NOAA WEATHER RADIO FOR UPDATES ON THIS SITUATION. && $$ HTTP://WEATHER.GOV/RENO
2 follow-up statements
997 WWUS45 KREV 022133 WSWREV URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RENO NV 133 PM PST SUN DEC 2 2012 CAZ072-NVZ002-022245- /O.CAN.KREV.WS.W.0007.000000T0000Z-121203T0000Z/ GREATER LAKE TAHOE AREA- INCLUDING THE CITIES OF...SOUTH LAKE TAHOE...TRUCKEE... INCLINE VILLAGE 133 PM PST SUN DEC 2 2012 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN RENO HAS CANCELLED THE WINTER STORM WARNING. HEAVY SNOW HAS ENDED ACROSS THE TAHOE BASIN WITH ONLY SCATTERED SNOW SHOWERS EXPECTED INTO THE EVENING. THEREFORE THE WINTER STORM WARNING IS CANCELED. $$ CAZ073-030300- /O.CON.KREV.WS.W.0007.000000T0000Z-121203T0300Z/ MONO- 133 PM PST SUN DEC 2 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 PM PST THIS EVENING ABOVE 8000 FEET... A WINTER STORM WARNING ABOVE 8000 FEET REMAINS IN EFFECT UNTIL 7 PM PST THIS EVENING. * TIMING: A STRONG COLD FRONT WILL DROP SNOW LEVELS TO 700 FEET THIS AFTERNOON WITH SNOW CONTINUING INTO THE EVENING. * SNOW ACCUMULATIONS: 10 TO 18 INCHES ABOVE 8000 FEET NEAR AND WEST OF HIGHWAY 395. LIGHTER ACCUMULATIONS OF 4 TO 8 INCHES DOWN TO 7000 FEET. * WINDS: SOUTHWEST 20 TO 30 MPH WITH GUSTS TO 55 MPH. RIDGE GUSTS TO 130 MPH OVER THE SIERRA CREST. * SNOW LEVELS: FALLING TO NEAR 7000 FEET THIS AFTERNOON. * IMPACTS: HEAVY SNOW AND GUSTY WINDS WILL CREATE PERIODS OF WHITEOUT CONDITIONS IN THE HIGH ELEVATIONS OF MONO COUNTY. MOTORISTS SHOULD EXPECT HAZARDOUS DRIVING CONDITIONS OVER THE HIGHER PASSES OF HIGHWAY 395 AS WELL AS NEAR THE TOWN OF MAMMOTH LAKES. PRECAUTIONARY/PREPAREDNESS ACTIONS... CONDITIONS CAN DETERIORATE RAPIDLY DURING WINTER STORMS...SLOW DOWN AND ALLOW EXTRA TIME WHEN TRAVELING. CARRY TIRE CHAINS... FOOD...WATER...BLANKETS AND A FLASHLIGHT IN YOUR CAR IN CASE OF AN EMERGENCY. CHECK OUR WEBSITE AT WEATHER.GOV/RENO OR LISTEN TO NOAA WEATHER RADIO FOR UPDATES ON THIS SITUATION. && $$ HTTP://WEATHER.GOV/RENO
989 WWUS45 KREV 030240 WSWREV URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RENO NV 640 PM PST SUN DEC 2 2012 CAZ073-030345- /O.EXP.KREV.WS.W.0007.000000T0000Z-121203T0300Z/ MONO- 640 PM PST SUN DEC 2 2012 ...WINTER STORM WARNING WILL EXPIRE AT 7 PM PST THIS EVENING ABOVE 8000 FEET... THE WINTER STORM WARNING ABOVE 8000 FEET WILL EXPIRE AT 7 PM PST THIS EVENING. SNOW HAS ENDED ACROSS THE REGION THIS EVENING AND THEREFORE THE WINTER STORM WARNING WILL BE ALLOWED TO EXPIRE ON TIME. $$ HTTP://WEATHER.GOV/RENO
The office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 2, 5:36 AM PST | Areal Flood Warning | REV | El Dorado, Lassen, Nevada, Placer, Plumas, Sierra | 7 hr |
| Dec 2, 8:19 AM PST | Areal Flood Warning | REV | Douglas, Storey, Washoe | 6 hr |
Nearby
Winter Storm Warnings in California, 2012Winter Storm Warnings in Nevada, 2012Every winter storm warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.