Alert archive / California / Winter Storm Warnings in 2021
Winter Storm Warning 2, NWS Reno, NV
NWS Reno, NV issued this winter storm warning at Oct 23, 2021, 11:43 AM PDT for 5 counties in California; Douglas County, Washoe County, Nevada. It took effect at Oct 24, 2021, 5:00 PM PDT. It was in force for 28 hr. 10 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
- Oct 23, 2021, 11:43 AM PDT (18:43 UTC)
- In effect from
- Oct 24, 2021, 5:00 PM PDT
- Expired
- Oct 25, 2021, 9:02 PM PDT
- In force
- 28 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 18:43 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 |
|---|---|---|---|
| Oct 25, 6:30 AM PDT | HEAVY SNOW 12 | 3 Ssw Meyers, CA | MEDIA REPORTED 12 INCHES OF HEAVY SNOW ON ECHO SUMMIT. |
| Oct 25, 7:00 AM PDT | SNOW 4.5 | 1 Ssw Boca Reservoir, CA | OBSERVER REPORTED 4.5 INCHES OF SNOW WITH A 24 HOUR TOTAL OF 4.72 INCHES OF LIQUID PRECIPITATION. |
| Oct 25, 7:15 AM PDT | HEAVY SNOW 5 | 2 Sw South Lake Tahoe, CA | POWER OUTAGE IN SOUTH LAKE TAHOE LIKELY DUE TO HEAVY WET SNOW. |
| Oct 25, 7:30 AM PDT | HEAVY SNOW 25 | 7 W Truckee, CA | LAW ENFORCEMENT REPORTED 25 INCHES OF SNOW NEAR SODA SPRINGS SINCE 10 PM LAST NIGHT. |
| Oct 25, 8:00 AM PDT | SNOW 9 | Tahoe City, CA | COOPERATIVE OBSERVER IN TAHOE CITY (AT LAKE LEVEL) REPORTED 24 HOUR TOTAL OF 9.0 INCHES OF SNOW WITH 6.10 INCHES OF LIQUID WATER. |
| Oct 25, 8:00 AM PDT | HEAVY SNOW 10 | 4 Nnw Washoe City, NV | PUBLIC REPORTS 10 INCHES OF NEW SNOW AT 6200 FEET. |
| Oct 25, 8:00 AM PDT | HEAVY SNOW 12 | 1 Nnw Homewood, CA | TRAINED SPOTTER MEASURED 12 INCHES OF SNOW ALONG WITH 6.4 INCHES OF LIQUID OVER THE LAST 24 HOURS. |
| Oct 25, 8:00 AM PDT | HEAVY SNOW 15 | Dollar Point, CA | PUBLIC REPORTS 15 INCHES OF SNOW ON DOLLAR HILL DR. IN TAHOE CITY. |
| Oct 25, 8:00 AM PDT | SNOW 20 | 1 Nw Dollar Point, CA | TAHOE CITY COOP OBSERVER ESTIMATED 20 INCHES OF SNOW WAS ON THE GROUND AT HIS HOUSE UP NEAR THE HIGH SCHOOL. ELEVATION APPROX 6500 FEET. |
| Oct 25, 8:20 AM PDT | SNOW 18 | 1 Ne Incline Village, NV | TRAINED SPOTTER IN INCLINE VILLAGE AT 6700 FEET REPORTED 18 INCHES OF SNOW, AND STILL FALLING. HE RECEIVED 5.00 INCHES OF RAINFALL (UNTIL IT STARTED SNOWING) SINCE THURSDAY. |
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, 6.7 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
- 1411 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
742 WWUS45 KREV 231843 WSWREV URGENT - WINTER WEATHER MESSAGE National Weather Service Reno NV 1143 AM PDT Sat Oct 23 2021 CAZ072-NVZ002-242300- /O.UPG.KREV.WS.A.0006.211025T0600Z-211026T0600Z/ /O.NEW.KREV.WS.W.0002.211025T0000Z-211026T0600Z/ Greater Lake Tahoe Area- 1143 AM PDT Sat Oct 23 2021 ...WINTER STORM WARNING IN EFFECT FROM 5 PM SUNDAY TO 11 PM PDT MONDAY ABOVE 7000 FEET... * WHAT...Heavy wet snow expected above 7000 feet. Total snow accumulations of 4-8 inches for Donner Pass and Echo Summit, 3-5 inches for Spooner Summit, 12-18 inches for Mt Rose Summit, with multiple feet of snow for higher mountains. Communities around Truckee and the Tahoe Basin are likely to only get an inch or two, with mainly rain falling, however there is a 30% chance of 6 inches of snow if snow levels fall faster than forecast. * WHERE...Greater Lake Tahoe Area. * WHEN...From 5 PM Sunday to 11 PM PDT Monday. Heaviest snowfall rates of 1-2 inches per hour possible at pass elevations between 8 PM Sunday and 4 AM Monday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning or evening commute. Very strong winds could cause extensive tree damage. * ADDITIONAL DETAILS...Winds will gust to 50 mph across the Truckee and Tahoe Basin areas, with ridges gusting well over 100 mph. This will result in extremely rough water on Lake Tahoe. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid travel if possible, you could be stuck in your vehicle for many hours. If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ CAZ073-242300- /O.UPG.KREV.WS.A.0006.211025T0000Z-211026T0600Z/ /O.NEW.KREV.WS.W.0002.211025T0000Z-211026T0600Z/ Mono County- 1143 AM PDT Sat Oct 23 2021 ...WINTER STORM WARNING IN EFFECT FROM 5 PM SUNDAY TO 11 PM PDT MONDAY ABOVE 8500 FEET... * WHAT...Heavy snow expected above 8500 feet. Snow accumulations of 3-5 inches in Mammoth Lakes, 3-5 inches along Highway 395 at Devils Gate, Conway, and Deadman Summits. Multiple feet of heavy wet snow for high elevations including around Tioga and Sonora Passes and Mammoth Mountain. * WHERE...Mono County. * WHEN...From 5 PM Sunday to 11 PM PDT Monday. Snowfall rates could approach 4 inches per hour in the higher elevation mountains after 3 AM Monday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning or evening commute. Very strong winds could cause extensive tree damage. * ADDITIONAL DETAILS...Winds will gust 50 to 60 mph across the Eastern Sierra, with ridges gusting well over 100 mph. This will result in hazardous travel coupled with the snowfall and heavy rains. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid travel if possible, you could be stuck in your vehicle for many hours. If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ http://www.weather.gov/reno
4 follow-up statements
225 WWUS45 KREV 242129 WSWREV URGENT - WINTER WEATHER MESSAGE National Weather Service Reno NV 229 PM PDT Sun Oct 24 2021 CAZ072-NVZ002-252130- /O.CON.KREV.WS.W.0002.211025T0000Z-211026T0600Z/ Greater Lake Tahoe Area- 229 PM PDT Sun Oct 24 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM PDT MONDAY ABOVE 7000 FEET... * WHAT...Heavy wet snow expected above 7000 feet. Total snow accumulations of 4-8 inches for Donner Pass and Echo Summit, 3-5 inches for Spooner Summit, 12-18 inches for Mt Rose Summit, with multiple feet of snow for higher mountains. Communities around Truckee and the Tahoe Basin are likely to only get an inch or two, with mainly rain falling; however, there is a 30% chance of 6 inches of snow if snow levels fall faster than forecast. * WHERE...Greater Lake Tahoe Area. * WHEN...From 5 PM Sunday to 11 PM PDT Monday. Heaviest snowfall rates of 1-2 inches per hour possible at pass elevations between 8 PM Sunday and 4 AM Monday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday morning commute. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Winds will gust up to 50 mph across the Truckee and Tahoe Basin areas with ridges gusting well over 100 mph. This will result in extremely rough water on Lake Tahoe. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid travel if possible, you could be stuck in your vehicle for many hours. If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ CAZ073-252130- /O.CON.KREV.WS.W.0002.211025T0000Z-211026T0600Z/ Mono County- 229 PM PDT Sun Oct 24 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM PDT MONDAY ABOVE 8500 FEET... * WHAT...Heavy snow expected above 8500 feet. Snow accumulations of 3-5 inches in Mammoth Lakes, 3-5 inches along Highway 395 at Devils Gate, Conway, and Deadman Summits. Multiple feet of heavy wet snow for high elevations including around Tioga and Sonora passes and for Mammoth Mountain. * WHERE...Mono County. * WHEN...From 5 PM Sunday to 11 PM PDT Monday. Snowfall rates could approach 4 inches per hour in the higher elevation mountains after 3 AM Monday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Monday morning commute. Very strong winds could cause extensive tree damage. * ADDITIONAL DETAILS...Winds will gust 50 to 60 mph across the Eastern Sierra with ridges gusting well over 100 mph. This will result in hazardous travel coupled with the snowfall and heavy rains. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid travel if possible, you could be stuck in your vehicle for many hours. If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ http://www.weather.gov/reno
124 WWUS45 KREV 251025 WSWREV URGENT - WINTER WEATHER MESSAGE National Weather Service Reno NV 325 AM PDT Mon Oct 25 2021 CAZ072-NVZ002-260600- /O.CON.KREV.WS.W.0002.000000T0000Z-211026T0600Z/ Greater Lake Tahoe Area- Including the cities of South Lake Tahoe, Truckee, Stateline, and Incline Village 325 AM PDT Mon Oct 25 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING... * WHAT...Heavy snow expected with snow levels low enough this morning for a period of heavy wet snow to occur down to lake level. Total snow accumulations of 4-9 inches at lake level mainly this morning, 12-18 inches for Spooner Summit, 18-24 inches for Mt Rose Summit, with several feet or more on higher peaks. The snow will possibly mix with or change back over to rain at times in the afternoon at lake level. So the worst conditions for lake level will be through the morning. * WHERE...Greater Lake Tahoe Area. * WHEN...From 5 PM Sunday to 11 PM PDT Monday. Heaviest snowfall rates of 2-3 inches per hour this morning. * IMPACTS...Travel could be very difficult. The hazardous conditions will impact the morning commute for all elevations and mainly across the passes later this afternoon. * ADDITIONAL DETAILS...Winds will gust up to 80 mph across the ridges with white out conditions at times this morning for area passes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid travel if possible, you could be stuck in your vehicle for many hours. If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ CAZ073-260600- /O.CON.KREV.WS.W.0002.000000T0000Z-211026T0600Z/ Mono County- 325 AM PDT Mon Oct 25 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING ABOVE 8500 FEET... * WHAT...Heavy snow expected above 8500 feet. Snow accumulations of 3-5 inches in Mammoth Lakes, 3-5 inches along Highway 395 at Devils Gate, Conway, and Deadman Summits. Multiple feet of heavy wet snow for high elevations including around Tioga and Sonora passes and for Mammoth Mountain. * WHERE...Mono County. * WHEN...From 5 PM Sunday to 11 PM PDT Monday. Snowfall rates could approach 4 inches per hour in the higher elevation mountains. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Monday morning commute. Very strong winds could cause extensive tree damage. * ADDITIONAL DETAILS...Winds will gust 50 to 60 mph across the Eastern Sierra with ridges gusting well over 100 mph. This will result in hazardous travel coupled with the snowfall and heavy rains. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid travel if possible, you could be stuck in your vehicle for many hours. If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ http://www.weather.gov/reno
167 WWUS45 KREV 252034 WSWREV URGENT - WINTER WEATHER MESSAGE National Weather Service Reno NV 134 PM PDT Mon Oct 25 2021 CAZ072-NVZ002-260600- /O.CON.KREV.WS.W.0002.000000T0000Z-211026T0600Z/ Greater Lake Tahoe Area- Including the cities of South Lake Tahoe, Truckee, Stateline, and Incline Village 134 PM PDT Mon Oct 25 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING... * WHAT...Snow. Expect snow showers to continue along the Sierra Crest into this evening. Additional snow accumulations of up to two inches are possible. * WHERE...Greater Lake Tahoe Area. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Plan on slippery road conditions through tonight with wet roads refreezing. * ADDITIONAL DETAILS...Fog may develop in some locations around the Tahoe Basin and along Interstate 80 near Truckee tonight. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ CAZ073-260600- /O.CON.KREV.WS.W.0002.000000T0000Z-211026T0600Z/ Mono County- 134 PM PDT Mon Oct 25 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING... * WHAT...Snow. Additional snow accumulations of 4 to 8 inches above 7500 feet and zero to 4 inches below 7500 feet. Winds gusting as high as 40 mph. * WHERE...Mono County. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Plan on slippery road conditions through tonight tonight with wet roads refreezing. * ADDITIONAL DETAILS...Fog may develop in some eastern Sierra valleys if skies clear and wind turn calm tonight. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ http://www.weather.gov/reno
069 WWUS45 KREV 260402 WSWREV URGENT - WINTER WEATHER MESSAGE National Weather Service Reno NV 902 PM PDT Mon Oct 25 2021 CAZ072-073-NVZ002-260515- /O.CAN.KREV.WS.W.0002.000000T0000Z-211026T0600Z/ Greater Lake Tahoe Area-Mono County- 902 PM PDT Mon Oct 25 2021 ...WINTER STORM WARNING IS CANCELLED... Heavy snowfall has ended and the Winter Storm Warning has been cancelled. A few lingering spotty snow showers will be possible this evening. Use caution on the roadways tonight as ample moisture and colder temperatures could lead to slick and icy spots. $$ http://www.weather.gov/reno
The office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 23, 11:27 AM PDT | High Wind Warning | REV | Mono | 40 hr |
| Oct 23, 11:27 AM PDT | Wind Advisory | REV | Churchill, Lyon, Pershing, Washoe | 27 hr |
Nearby
Winter Storm Warnings in California, 2021Winter Storm Warnings in Nevada, 2021Every winter storm warning in 2021
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.