Alert archive / California / Winter Storm Warnings in 2018
Winter Storm Warning 6, NWS Reno, NV
NWS Reno, NV issued this winter storm warning at Mar 20, 2018, 12:49 PM PDT for 5 counties in California; Douglas County, Washoe County, Nevada. It took effect at Mar 21, 2018, 5:00 PM PDT. It was in force for 29 hr. 25 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
- Mar 20, 2018, 12:49 PM PDT (19:49 UTC)
- In effect from
- Mar 21, 2018, 5:00 PM PDT
- Expired
- Mar 22, 2018, 10:22 PM PDT
- In force
- 29 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 19:49 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 |
|---|---|---|---|
| Mar 22, 7:00 AM PDT | SNOW 1.5 | Sugar Pine Point S, CA | COCORAHS STATION CA-ED-9, SUGAR PINE POINT S. |
| Mar 22, 7:00 AM PDT | SNOW 1.5 | Tahoma, Ca, CA | CO-OP OBSERVER STATION TAAC1, TAHOMA, CA. |
| Mar 22, 7:00 AM PDT | SNOW 6 | 4 N Spooner Summit, NV | MESONET STATION MRLN2, 4 N SPOONER SUMMIT. |
| Mar 22, 7:00 AM PDT | SNOW 8 | 1 Sw Alpine Meadows, CA | ALPINE MEADOWS REPORTED 8 INCHES OF SNOW IN THE LAST 24 HOURS. |
| Mar 22, 7:00 AM PDT | SNOW 11 | 1 Wsw Squaw Valley, CA | SQUAW VALLEY SKI RESORT REPORTED 11 INCHES OF SNOW IN THE LAST 24 HOURS. |
| Mar 22, 7:00 AM PDT | SNOW 14 | 1 Ssw Northstar, CA | NORTH STAR SKI ARE REPORTED 14 INCHES OF SNOW IN THE LAST 24 HOURS. |
| Mar 22, 7:00 AM PDT | SNOW 16 | 1 Ne Mount Rose Summit, NV | MT. ROSE SKI AREA REPORTED 16 INCHES OF SNOW OVERNIGHT WITH A STORM TOTAL OF 21-25 IN THE LAST 36 HOURS. |
| Mar 22, 7:00 AM PDT | SNOW 18 | 3 E Incline Village, NV | DIAMOND PEAK SKI AREA REPORTED 18 INCHES OF SNOW IN THE LAST 24 HOURS. |
| Mar 22, 7:00 AM PDT | HEAVY SNOW 40 | 1 Ssw Mammoth Mountain, CA | MAMMOTH MOUNTAIN SKI AREA REPORTED 40-48 INCHES OF SNOW IN THE LAST 24 HOURS. |
| Mar 22, 8:00 AM PDT | SNOW 3 | 7 Wsw Coleville, CA | MESONET STATION XXXC1, 7 WSW COLEVILLE. |
| Mar 22, 8:00 AM PDT | SNOW 8 | Mammoth Lakes R.S., CA | CO-OP OBSERVER STATION MALC1, MAMMOTH LAKES R.S. |
| Mar 22, 8:00 AM PDT | SNOW 10 | 3 Wnw Grover Hot Spring, CA | MESONET STATION BSKC1, 3 WNW GROVER HOT SPRINGS. |
| Mar 22, 8:00 AM PDT | SNOW 19 | 3 Wsw Conway Summit, CA | MESONET STATION VGAC1, 3 WSW CONWAY SUMMIT. |
| Mar 22, 9:00 AM PDT | SNOW 2 | Dagget Pass, NV | CO-OP OBSERVER STATION DAGN2, DAGGET PASS. |
| Mar 22, 9:00 AM PDT | SNOW 2 | Meeks Bay, CA | MESONET STATION RUBC1, MEEKS BAY. |
| Mar 22, 9:00 AM PDT | SNOW 5 | 7 Wsw Coleville, CA | MESONET STATION XXXC1, 7 WSW COLEVILLE. |
| Mar 22, 9:00 AM PDT | SNOW 8 | 4 N Spooner Summit, NV | MESONET STATION MRLN2, 4 N SPOONER SUMMIT. |
| Mar 22, 9:00 AM PDT | SNOW 9 | 1 Sw Independence Lake, CA | MESONET STATION ILKC1, 1 SW INDEPENDENCE LAKE. |
| Mar 22, 9:00 AM PDT | SNOW 9 | 5 N Leavitt Meadows, CA | MESONET STATION SDWC1, 5 N LEAVITT MEADOWS. |
| Mar 22, 9:00 AM PDT | SNOW 9 | Sonora Pass, CA | MESONET STATION SRAC1, SONORA PASS. |
| Mar 22, 9:00 AM PDT | SNOW 11 | 2 Se Stateline, CA | MESONET STATION HVNC1, 2 SE STATELINE. |
| Mar 22, 9:00 AM PDT | SNOW 20 | 3 Wsw Conway Summit, CA | MESONET STATION VGAC1, 3 WSW CONWAY SUMMIT. |
| Mar 22, 10:05 AM PDT | SNOW 8 | Homewood, CA | HOMEWOOD SKI AREA REPORTED 8 INCHES OF SNOW IN THE LAST 24 HOURS. |
| Mar 22, 3:02 PM PDT | HEAVY SNOW 34 | 3 Nne Leavitt Meadows, CA | MILITARY UNIT OPERATING AT 8400 FEET ABOVE THE MARINE CORPS MOUNTAIN WARFARE TRAINING CENTER RECEIVED 34 INCHES OF SNOW FROM 7 PM PDT 21 MARCH TO 1 PM PDT 22 MARCH. A MIX OF RAIN AND SNOW WAS REPORTED AT 6800 FEET AT THE MAIN BASE WITH AN ACCUMULATION OF 2-3 I |
| Mar 22, 7:49 PM PDT | HEAVY SNOW 2.7 | 3 Wsw Gardnerville Ranc, NV | TRAINED WEATHER SPOTTER REPORTED A STORM TOTAL 2.69 INCHES OF RAINFALL IN THE PAST 48 HOURS. |
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, 7.8 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
- 1878 m above ground
- 0-6 km bulk shear
- 81 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 337 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
418 WWUS45 KREV 201949 WSWREV URGENT - WINTER WEATHER MESSAGE National Weather Service Reno NV 1249 PM PDT Tue Mar 20 2018 CAZ072-NVZ002-211200- /O.UPG.KREV.WS.A.0006.180322T0000Z-180323T1200Z/ /O.NEW.KREV.WS.W.0006.180322T0000Z-180323T1200Z/ Greater Lake Tahoe Area- 1249 PM PDT Tue Mar 20 2018 ...WINTER STORM WARNING IN EFFECT FROM 5 PM WEDNESDAY TO 5 AM PDT FRIDAY ABOVE 7000 FEET... * WHAT...Heavy snow expected. Total snow accumulations of 2 to 3 feet mainly above 7500 feet, with localized amounts up to 4 feet or more near the Sierra Crest, are expected. 6 to 12 inches are likely down to 7000 feet, with localized amounts up to 18 inches west of Highway 89. * WHERE...Greater Lake Tahoe Area. * WHEN...From 5 PM Wednesday to 5 AM PDT Friday. * ADDITIONAL DETAILS...Gusty southwest to west winds near 45 mph are possible at times and may create periods of near whiteout conditions as well as choppy conditions on Lake Tahoe. Travel will be very difficult to impossible over the higher passes. Snow levels will fall to lake level by late Thursday night, but accumulations will be minimal. Damage to trees and power lines is likely. 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. && $$ CAZ073-211200- /O.UPG.KREV.WS.A.0006.180322T0000Z-180323T1200Z/ /O.NEW.KREV.WS.W.0006.180322T0000Z-180323T1200Z/ Mono County- Including the city of Mammoth Lakes 1249 PM PDT Tue Mar 20 2018 ...WINTER STORM WARNING IN EFFECT FROM 5 PM WEDNESDAY TO 5 AM PDT FRIDAY ABOVE 7500 FEET... * WHAT...Heavy snow expected. Total snow accumulations of 2 to 4 feet above 8000 feet, with localized amounts up to 5 feet or more near the Sierra Crest. Accumulations of 1 to 2 feet are likely down to 7500 feet, with 4 to 12 inches between 6500 and 7500 feet west of Highway 395. * WHERE...Mono County. * WHEN...From 5 PM Wednesday to 5 AM PDT Friday. * ADDITIONAL DETAILS...Plan on difficult travel conditions, especially over the higher passes along Highway 395. Gusty west to southwest winds of up to 40 mph may produce brief whiteout conditions. Damage to trees and power lines is likely. Snow levels will fall below 6500 feet late Thursday night, with minimal accumulations. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid travel if possible, you could be stuck in your vehicle for many hours. If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ http://www.weather.gov/reno
8 follow-up statements
324 WWUS45 KREV 211035 WSWREV URGENT - WINTER WEATHER MESSAGE National Weather Service Reno NV 335 AM PDT Wed Mar 21 2018 CAZ072-NVZ002-220000- /O.CON.KREV.WS.W.0006.180322T0000Z-180323T1200Z/ Greater Lake Tahoe Area- 335 AM PDT Wed Mar 21 2018 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM PDT FRIDAY ABOVE 7000 FEET... * WHAT...Heavy snow expected. Total snow accumulations of 2 to 3 feet mainly above 7500 feet, with localized amounts up to 4 feet near the Sierra Crest, are expected. 4 to 10 inches down to 7000 feet, with localized amounts up to 18 inches west of Highway 89, are expected. * WHERE...Greater Lake Tahoe Area above 7000 feet. * WHEN...From 5 PM this afternoon to 5 AM PDT Friday. * ADDITIONAL DETAILS...Gusty southwest to west winds near 45 mph are possible at times and may create periods of near whiteout conditions as well as choppy conditions on Lake Tahoe. Travel will be very difficult to impossible over the higher passes. Snow levels will fall to lake level by late Thursday night, but accumulations will be minimal. Damage to trees and power lines is likely. 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. && $$ CAZ073-220000- /O.CON.KREV.WS.W.0006.180322T0000Z-180323T1200Z/ Mono County- Including the city of Mammoth Lakes 335 AM PDT Wed Mar 21 2018 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM PDT FRIDAY ABOVE 7500 FEET... * WHAT...Heavy snow expected. Total snow accumulations of 2 to 4 feet mainly above 8500 feet, with localized amounts of 5 or more feet near the Sierra crest, are expected. 5 to 10 inches are expected down to 7500 feet. * WHERE...Mono County above 7500 feet. * WHEN...From 5 PM this afternoon to 5 AM PDT Friday. * ADDITIONAL DETAILS...Plan on difficult travel conditions, especially over the higher passes along Highway 395. Gusty west to southwest winds of up to 40 mph may produce brief whiteout conditions. Damage to trees and power lines is likely. Snow levels will fall below 6500 feet late Thursday night, with 2 to 4 inches of snow accumulation likely west of Highway 395. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid travel if possible, you could be stuck in your vehicle for many hours. If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ http://www.weather.gov/reno
150 WWUS45 KREV 212022 WSWREV URGENT - WINTER WEATHER MESSAGE National Weather Service Reno NV 122 PM PDT Wed Mar 21 2018 CAZ072-NVZ002-221200- /O.CON.KREV.WS.W.0006.180322T0000Z-180323T1200Z/ Greater Lake Tahoe Area- 122 PM PDT Wed Mar 21 2018 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM PDT FRIDAY ABOVE 7000 FEET... * WHAT...Heavy snow expected. Total snow accumulations of 2 to 4 feet mainly above 7500, with localized amounts up to 5 feet near the Sierra Crest, are expected. 4 to 12 inches down to 7000 feet, with localized amounts up to 18 inches west of Highway 89, are expected. * WHERE...Greater Lake Tahoe Area. * WHEN...From 5 PM this afternoon to 5 AM PDT Friday. * ADDITIONAL DETAILS...Gusty west to southwest winds near 40 mph are possible at times and may create periods of near whiteout conditions as well as choppy conditions on Lake Tahoe. Travel will be very difficult to impossible over the higher passes. Snow levels will fall to lake level by late Thursday night, but accumulations will be minimal. Damage to trees and power lines is likely. 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. && $$ CAZ073-221200- /O.CON.KREV.WS.W.0006.180322T0000Z-180323T1200Z/ Mono County- Including the city of Mammoth Lakes 122 PM PDT Wed Mar 21 2018 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM PDT FRIDAY ABOVE 7500 FEET... * WHAT...Heavy snow expected. Total snow accumulations of 2 to 4 feet mainly above 8500 feet, with localized amounts of 5 or more feet near the Sierra Crest, are expected. 5 to 10 inches expected down to 7500 feet. * WHERE...Mono County. * WHEN...From 5 PM this afternoon to 5 AM PDT Friday. * ADDITIONAL DETAILS...Plan on difficult travel conditions, especially over the higher passes along Highway 395. Gusty west to southwest winds of up to 40 mph may produce brief whiteout conditions. Damage to trees and power lines is likely. Snow levels will fall below 6500 feet late Thursday night, with 2 to 4 inches of snow accumulation likely west of Highway 395. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid travel if possible, you could be stuck in your vehicle for many hours. If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ http://www.weather.gov/reno
788 WWUS45 KREV 221137 WSWREV URGENT - WINTER WEATHER MESSAGE National Weather Service Reno NV 437 AM PDT Thu Mar 22 2018 CAZ072-NVZ002-230000- /O.CON.KREV.WS.W.0006.000000T0000Z-180323T1200Z/ Greater Lake Tahoe Area- 437 AM PDT Thu Mar 22 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT FRIDAY ABOVE 7000 FEET... * WHAT...Heavy snow occurring. Additional snow accumulations of 1 to 3 feet, mainly above 7500 feet, with 4 to 12 inches down to 7000 feet, are expected. At lake level, up to 4 inches of snowfall is possible. * WHERE...Greater Lake Tahoe Area above 7000 feet. * WHEN...Until 5 AM PDT Friday. * ADDITIONAL DETAILS...Gusty west to southwest winds near 40 mph are possible at times and may create periods of near whiteout conditions as well as choppy conditions on Lake Tahoe. Travel will be very difficult over the higher passes. Damage to trees and power lines is likely. 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. && $$ CAZ073-230000- /O.CON.KREV.WS.W.0006.000000T0000Z-180323T1200Z/ Mono County- Including the city of Mammoth Lakes 437 AM PDT Thu Mar 22 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT FRIDAY ABOVE 7500 FEET... * WHAT...Heavy snow occurring. Additional snow accumulations 1 to 4 feet mainly above 8500 feet, with 5-10 inches down to 7500 feet, are expected. * WHERE...Mono County above 8000 feet. * WHEN...Until 5 AM PDT Friday. * ADDITIONAL DETAILS...Plan on difficult travel conditions, especially over the higher passes along Highway 395. Gusty west to southwest winds of up to 40 mph may produce brief whiteout conditions. Damage to trees and power lines is likely. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid travel if possible, you could be stuck in your vehicle for many hours. If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ http://www.weather.gov/reno
974 WWUS45 KREV 221256 WSWREV URGENT - WINTER WEATHER MESSAGE National Weather Service Reno NV 556 AM PDT Thu Mar 22 2018 CAZ072-NVZ002-230000- /O.CON.KREV.WS.W.0006.000000T0000Z-180323T1200Z/ Greater Lake Tahoe Area- 556 AM PDT Thu Mar 22 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT FRIDAY ABOVE 6500 FEET... * WHAT...Heavy snow occurring. Additional snow accumulations of 8 to 16 inches, with local amounts up to 2 feet near the Sierra Crest, are expected above 7000 feet. Up to 8 inches is expected between 6500 and 7000 feet, with a few slushy inches of snowfall down to lake level. * WHERE...Greater Lake Tahoe Area above 6500 feet. * WHEN...Until 5 AM PDT Friday. * ADDITIONAL DETAILS...Plan on difficult travel conditions, especially over passes. Damage to trees and power lines is possible. Be prepared for significant reductions in visibility at times. 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. && $$ CAZ073-230000- /O.CON.KREV.WS.W.0006.000000T0000Z-180323T1200Z/ Mono County- Including the city of Mammoth Lakes 556 AM PDT Thu Mar 22 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT FRIDAY ABOVE 7500 FEET... * WHAT...Heavy snow occurring. Additional snow accumulations of 1 to 2 feet with localized amounts up to 3 feet near the Sierra Crest, are expected above 7500 feet. A light slushy accumulation is expected down to around 7000 feet. * WHERE...Mono County above 7500 feet. * WHEN...Until 5 AM PDT Friday. * ADDITIONAL DETAILS...Plan on difficult travel conditions for passes and higher roads. Damage to trees and power lines is possible. Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid travel if possible, you could be stuck in your vehicle for many hours. If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ CAZ071-230000- /O.NEW.KREV.WW.Y.0012.180322T1256Z-180323T0000Z/ Lassen-Eastern Plumas-Eastern Sierra Counties- 556 AM PDT Thu Mar 22 2018 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON ABOVE 5500 FEET... * WHAT...Snow occurring. Wet snow accumulations of 2 to 5 inches, with localized amounts up to 8 inches, are expected above 5500 feet. * WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties above 5500 feet. * WHEN...Until 5 PM PDT this afternoon. * ADDITIONAL DETAILS...Plan on slushy and snow-covered roads for higher roads and passes, including Fredonyer Pass and Highway 44 near Bogard, especially this morning. Damage to trees and power lines is possible. Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Even light snowfall causes major travel delays, especially during periods of high traffic volume. Be sure to allow extra time to reach your destination. Leave extra space between vehicles since it takes longer to stop on slick roadways. The latest road conditions can be obtained by calling 5 1 1. && $$ http://www.weather.gov/reno
758 WWUS45 KREV 221627 WSWREV URGENT - WINTER WEATHER MESSAGE National Weather Service Reno NV 927 AM PDT Thu Mar 22 2018 CAZ072-NVZ002-230430- /O.CON.KREV.WS.W.0006.000000T0000Z-180323T1200Z/ Greater Lake Tahoe Area- 927 AM PDT Thu Mar 22 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT FRIDAY ABOVE 6500 FEET... * WHAT...Heavy snow occurring. Additional snow accumulations of 6 to 12 inches, with local amounts up to 2 feet near the Sierra Crest, are expected above 7000 feet. Up to 8 inches is expected between 6500 and 7000 feet, with a few slushy inches of snowfall down to lake level. * WHERE...Greater Lake Tahoe Area above 6500 feet. * WHEN...Until 5 AM PDT Friday. * ADDITIONAL DETAILS...Plan on difficult travel conditions, especially over passes. Damage to trees and power lines is possible. Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid travel if possible, you could be stuck in your vehicle for many hours. If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ CAZ073-230430- /O.CON.KREV.WS.W.0006.000000T0000Z-180323T1200Z/ Mono County- Including the city of Mammoth Lakes 927 AM PDT Thu Mar 22 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT FRIDAY ABOVE 7000 FEET... * WHAT...Heavy snow occurring. Additional snow accumulations of 1 to 2 feet with localized amounts up to 3 feet near the Sierra Crest, are expected above 7500 feet. 4 to 8 inches of heavy, slushy snow is expected down to 7000 feet. * WHERE...Mono County above 7000 feet. * WHEN...Until 5 AM PDT Friday. * ADDITIONAL DETAILS...Plan on difficult travel conditions for passes and higher roads. Damage to trees and power lines is possible. Be prepared for significant reductions in visibility at times. 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. && $$ CAZ071-230000- /O.CON.KREV.WW.Y.0012.000000T0000Z-180323T0000Z/ Lassen-Eastern Plumas-Eastern Sierra Counties- 927 AM PDT Thu Mar 22 2018 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON ABOVE 5000 FEET... * WHAT...Snow occurring. Wet snow accumulations of 2 to 6 inches, with localized amounts up to 9 inches, are expected above 5000 feet. * WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties above 5000 feet. * WHEN...Until 5 PM PDT this afternoon. * ADDITIONAL DETAILS...Plan on slushy and snow-covered roads for higher roads and passes, including Fredonyer Pass and Highway 44 near Bogard, especially this morning. Localized areas of slush are also likely on Highway 70 in Plumas County. Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Even light snowfall causes major travel delays, especially during periods of high traffic volume. Be sure to allow extra time to reach your destination. Leave extra space between vehicles since it takes longer to stop on slick roadways. The latest road conditions can be obtained by calling 5 1 1. && $$ http://www.weather.gov/reno
236 WWUS45 KREV 222111 WSWREV URGENT - WINTER WEATHER MESSAGE National Weather Service Reno NV 211 PM PDT Thu Mar 22 2018 CAZ072-NVZ002-231200- /O.NEW.KREV.WW.Y.0013.180324T0600Z-180325T1200Z/ /O.CON.KREV.WS.W.0006.000000T0000Z-180323T1200Z/ Greater Lake Tahoe Area- Including the cities of South Lake Tahoe, Truckee, Stateline, and Incline Village 211 PM PDT Thu Mar 22 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT FRIDAY ABOVE 6500 FEET... ...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM FRIDAY TO 5 AM PDT SUNDAY... * WHAT...Heavy snow occurring above 6500 feet. Snow expected. Above 6500 feet, additional snow accumulations of 5 to 8 inches, with localized amounts up to 12 inches, are expected. For the weekend storm...total snow accumulations of 8 to 12 inches, with localized amounts up to 18 inches, are expected. * WHERE...Greater Lake Tahoe Area. * WHEN...For the Winter Storm Warning, until 5 AM PDT Friday. For the Winter Weather Advisory, from 11 PM Friday to 5 AM PDT Sunday. * ADDITIONAL DETAILS...Plan on difficult travel conditions, including during the evening commutes. Damage to trees and power lines is likely. Be prepared for significant reductions in visibility at times. 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. && $$ CAZ073-231200- /O.CON.KREV.WS.W.0006.000000T0000Z-180323T1200Z/ Mono County- Including the city of Mammoth Lakes 211 PM PDT Thu Mar 22 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT FRIDAY ABOVE 7000 FEET... * WHAT...Heavy snow occurring. Additional snow accumulations of 3 to 6 inches, with localized amounts up to 12 inches, are expected. * WHERE...Mono County above 7000 feet. * WHEN...Until 5 AM PDT Friday. * ADDITIONAL DETAILS...Plan on difficult travel conditions, including during the evening commute. Damage to trees and power lines is likely. Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid travel if possible, you could be stuck in your vehicle for many hours. If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ CAZ071-231200- /O.NEW.KREV.WW.Y.0013.180324T0600Z-180325T1200Z/ /O.CON.KREV.WW.Y.0012.000000T0000Z-180323T0000Z/ Lassen-Eastern Plumas-Eastern Sierra Counties- Including the cities of Portola and Susanville 211 PM PDT Thu Mar 22 2018 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON ABOVE 5000 FEET... ...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM FRIDAY TO 5 AM PDT SUNDAY... * WHAT...Wet snow occurring above 5000 feet. Above 5000 feet, additional wet snow accumulations of up to 2 inches. For the weekend storm...total snow accumulations of 3 to 6 inches, with localized amounts up to 14 inches, are expected. * WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties. * WHEN...For the Winter Weather Advisory, until 5 PM PDT this afternoon. For the Winter Weather Advisory, from 11 PM Friday to 5 AM PDT Sunday. * ADDITIONAL DETAILS...Plan on slippery road conditions, including during the evening commute. Tree branches could fall. Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Even light snowfall causes major travel delays, especially during periods of high traffic volume. Be sure to allow extra time to reach your destination. Leave extra space between vehicles since it takes longer to stop on slick roadways. The latest road conditions can be obtained by calling 5 1 1. && $$ CAZ070-231200- /O.NEW.KREV.WW.Y.0013.180324T0600Z-180325T1200Z/ Surprise Valley California- Including the cities of Cedarville and Fort Bidwell 211 PM PDT Thu Mar 22 2018 ...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM FRIDAY TO 5 AM PDT SUNDAY... * WHAT...Snow expected. Total snow accumulations of 2 to 5 inches are expected. * WHERE...Surprise Valley California. * WHEN...From 11 PM Friday to 5 AM PDT Sunday. * ADDITIONAL DETAILS...Plan on difficult travel conditions. Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Even light snowfall causes major travel delays, especially during periods of high traffic volume. Be sure to allow extra time to reach your destination. Leave extra space between vehicles since it takes longer to stop on slick roadways. The latest road conditions can be obtained by calling 5 1 1. && $$ http://www.weather.gov/reno
090 WWUS45 KREV 230145 WSWREV URGENT - WINTER WEATHER MESSAGE National Weather Service Reno NV 645 PM PDT Thu Mar 22 2018 CAZ072-NVZ002-231200- /O.CAN.KREV.WS.W.0006.000000T0000Z-180323T1200Z/ /O.CON.KREV.WW.Y.0013.180324T0600Z-180325T1200Z/ Greater Lake Tahoe Area- Including the cities of South Lake Tahoe, Truckee, Stateline, and Incline Village 645 PM PDT Thu Mar 22 2018 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM FRIDAY TO 5 AM PDT SUNDAY... ...WINTER STORM WARNING FOR TONIGHT IS CANCELLED... * WHAT...The threat for heavy snow has ended for tonight. For the weekend storm...total snow accumulations of 8 to 12 inches, with localized amounts up to 18 inches, are expected. * WHERE...Greater Lake Tahoe Area. * WHEN...For the Winter Weather Advisory, from 11 PM Friday to 5 AM PDT Sunday. * ADDITIONAL DETAILS...Plan on difficult travel conditions especially outside of daylight hours. Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Even light snowfall causes major travel delays, especially during periods of high traffic volume. Be sure to allow extra time to reach your destination. Leave extra space between vehicles since it takes longer to stop on slick roadways. The latest road conditions can be obtained by calling 5 1 1. && $$ CAZ073-231200- /O.CON.KREV.WS.W.0006.000000T0000Z-180323T1200Z/ Mono County- Including the city of Mammoth Lakes 645 PM PDT Thu Mar 22 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT FRIDAY ABOVE 7000 FEET... * WHAT...Heavy snow occurring. Additional snow accumulations of 3 to 6 inches, with localized amounts up to 12 inches, are expected. * WHERE...Mono County above 7000 feet. * WHEN...Until 5 AM PDT Friday. * ADDITIONAL DETAILS...Plan on difficult travel conditions, including during the evening commute. Damage to trees and power lines is likely. Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid travel if possible, you could be stuck in your vehicle for many hours. If you must travel, prepare for long delays and carry an emergency kit with extra food, water and clothing. If you stay home, have a backup plan in case of power outages. The latest road conditions can be obtained by calling 5 1 1. && $$ CAZ070-071-231200- /O.CON.KREV.WW.Y.0013.180324T0600Z-180325T1200Z/ Surprise Valley California-Lassen-Eastern Plumas- Eastern Sierra Counties- Including the cities of Cedarville, Fort Bidwell, Portola, and Susanville 645 PM PDT Thu Mar 22 2018 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM FRIDAY TO 5 AM PDT SUNDAY... * WHAT...Wet snow occurring above 5000 feet. Above 5000 feet, additional wet snow accumulations of up to 2 inches. For the weekend storm...total snow accumulations of 3 to 6 inches, with localized amounts up to 14 inches, are expected. * WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties. * WHEN...For the Winter Weather Advisory, until 5 PM PDT this afternoon. For the Winter Weather Advisory, from 11 PM Friday to 5 AM PDT Sunday. * ADDITIONAL DETAILS...Plan on slippery road conditions, including during the evening commute. Tree branches could fall. Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Even light snowfall causes major travel delays, especially during periods of high traffic volume. Be sure to allow extra time to reach your destination. Leave extra space between vehicles since it takes longer to stop on slick roadways. The latest road conditions can be obtained by calling 5 1 1. && $$ http://www.weather.gov/reno
441 WWUS45 KREV 230522 WSWREV URGENT - WINTER WEATHER MESSAGE National Weather Service Reno NV 1022 PM PDT Thu Mar 22 2018 CAZ073-230630- /O.CAN.KREV.WS.W.0006.000000T0000Z-180323T1200Z/ Mono County- 1022 PM PDT Thu Mar 22 2018 ...WINTER STORM WARNING IS CANCELLED... Snow was ending across the eastern Sierra late this evening. The threat for heavy snow has ended. Roads will remain icy where untreated and will be slick. Make sure to check chain and snow tire requirements before traveling Highway 395 tonight and early Friday. $$ CAZ070-071-231200- /O.CON.KREV.WW.Y.0013.180324T0600Z-180325T1200Z/ Surprise Valley California-Lassen-Eastern Plumas- Eastern Sierra Counties- Including the cities of Cedarville, Fort Bidwell, Portola, and Susanville 1022 PM PDT Thu Mar 22 2018 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM FRIDAY TO 5 AM PDT SUNDAY... * WHAT...Total snow accumulations of 3 to 6 inches, with localized amounts up to 14 inches, are expected. * WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties. * WHEN...For the Winter Weather Advisory, until 5 PM PDT this afternoon. For the Winter Weather Advisory, from 11 PM Friday to 5 AM PDT Sunday. * ADDITIONAL DETAILS...Plan on slippery road conditions, including during the evening commute. Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Even light snowfall causes major travel delays, especially during periods of high traffic volume. Be sure to allow extra time to reach your destination. Leave extra space between vehicles since it takes longer to stop on slick roadways. The latest road conditions can be obtained by calling 5 1 1. && $$ CAZ072-NVZ002-231200- /O.CON.KREV.WW.Y.0013.180324T0600Z-180325T1200Z/ Greater Lake Tahoe Area- Including the cities of South Lake Tahoe, Truckee, Stateline, and Incline Village 1022 PM PDT Thu Mar 22 2018 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM FRIDAY TO 5 AM PDT SUNDAY... * WHAT...Total snow accumulations of 8 to 12 inches, with localized amounts up to 18 inches, are expected. * WHERE...Greater Lake Tahoe Area. * WHEN...For the Winter Weather Advisory, from 11 PM Friday to 5 AM PDT Sunday. * ADDITIONAL DETAILS...Plan on difficult travel conditions especially outside of daylight hours. Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Even light snowfall causes major travel delays, especially during periods of high traffic volume. Be sure to allow extra time to reach your destination. Leave extra space between vehicles since it takes longer to stop on slick roadways. The latest road conditions can be obtained by calling 5 1 1. && $$ http://www.weather.gov/reno
What forecasters said that day
The local office's own words before this winter storm warning went out, 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 this winter storm warning went out at Mar 20, 3:43 AM PDT, 9 hours 6 minutes earlier.
Area forecast discussion, Mar 20, 3:43 AM PDT, 9 hours 6 minutes before
Area Forecast Discussion
National Weather Service Reno NV
343 AM PDT Tue Mar 20 2018
.SYNOPSIS...
A period of light valley rain and higher elevation snow is expected
this evening and tonight. A much stronger atmospheric river type
storm pushes into the region Wednesday night through early Friday
morning. This will bring periods of heavy valley rain and heavy
Sierra snow along with gusty winds. The weekend will be colder
with snow showers possible down to all valley floors.
&&
.SHORT TERM...
Clouds will be on the increase today as a period of light valley
rain and higher elevation snow begins this evening and tonight.
However, the main focus in the short-term forecast is the incoming
Atmospheric River (AR) storm poised to provide multiple feet of high
elevation snowfall (Sierra cement) and periods of heavy rain to
lower valleys in the Sierra and western Nevada. Main change in the
forecast was to continue to increase expected precipitation totals
Wed-Thu.
*TIMING: Initial light to moderate precipitation with this storm
begins on Wednesday in the Sierra but expecting the main period
of heaviest precipitation to begin Wednesday night into early
Thursday morning. Moderate to heavy precipitation continues
Thursday afternoon before quickly diminishing Thursday night as a
pronounced dry slot cuts off precipitation.
*SNOW LEVELS: AR storms are inherently warm systems as their
moisture has tropical origins. As such, snow levels on Wednesday
into Thursday morning will begin in the 7,500-8,500' range from
the Tahoe Basin extending southward into Mono County. Snow levels
will begin to drop in the late Thursday afternoon into evening
time frame as the cold front nears. There is still some timing
uncertainty on how quickly the front arrives but nonetheless,
late Thursday afternoon-evening looks to be the period where
travel deteriorates across most passes and snow will be possible
at Lake Tahoe level and along portions of Hwy 395 through Mono
County.
*RAIN/SNOW/HYDROLOGIC CONCERNS: This AR storm will provide heavy
rains and high elevation snowfall Wed-Thu with most
precipitation occurring Thursday. Overall, the main moisture
plume will be concentrated through the Sierra in Mono County
where 2-4 feet of snow will be possible above mainly 8,000' with
localized areas up to 6 feet along the crest in southern Mono
County. The Tahoe Basin will see up to 2-3 feet mainly above
7,500' with localized areas up to 4 feet along the crest. Snow
amounts below 7,500' are much lower confidence but generally
6-12" are possible down to 7,000' feet with a few inches possible
down to lake level by Thursday night.
This will be a rain event for western Nevada with moderate to heavy
rain expected on Thursday. 0.50-0.75" are possible across western
Nevada valleys. Rises on small creeks and streams can be expected
with some minor flooding possible in urban and poor drainage areas.
Minor flooding is also possible through the Sierra where snow has
not been removed to allow for drainage. There could also be rises on
small streams below 7000 feet that drain into the Tahoe basin and on
the east side of the Sierra. Although, main stem rivers do not look
like an issue, rises are expected on all rivers. The current
forecast takes the Middle Fork of the Feather River in Portola to
monitor stage, but at this point all other rivers are forecast to
remain below the point of concern. Fuentes
.LONG TERM...Friday onward...
The break in the precipitation between the warmer and colder
portions of the storms Friday morning is even more defined in latest
model guidance. Colder air moves into the region Friday as an upper
trough digs into northern CA/NV with a secondary cold frontal
boundary shifting through the region Friday night. This boundary
will provide the forcing to develop snow across the area with the
best chances in the Sierra, northeast California, and in western
Nevada mainly north of Highway 50. This is a fast moving feature and
there will only be a short period where the moisture and forcing
align, so am not expecting significant snow accumulations. However,
with snow levels at all valley floors, even light accumulations may
bring travel impacts across the region. A final passing shortwave
could bring one more chance for light snow showers Saturday night.
Considering we are getting into the latter part of March, most road
impacts from these lighter snows will be limited to the overnight
and early morning hours.
A warming and drying trend looks likely for next week, however
springtime is notorious for poor long range model guidance, so
nothing is a lock just yet. -Dawn
&&
.AVIATION...
Mid and high level clouds continue to stream into the region early
this morning, limiting the chances for fog formation. The one
exception is KTRK with patchy freezing fog through 16z this
morning.
A weak system will bring light rain and snow this afternoon and
evening with slightly lowered ceilings and terrain obscuration
possible. A much stronger storm is on tap for Wednesday and
Thursday with strong and gusty winds, and moderate to heavy
mountain snow and valley rain. Most precipitation should be
limited to the Sierra and northeast California on Wednesday, with
widespread spillover into western Nevada on Thursday. Terminals
should all just see rain, but expect widespread mountain
obscuration and periods of MVFR (30% chance IFR) ceilings and
visibility.
Winds will bring turbulence and wind shear, with local studies
indicating LLWS possible for KRNO Wednesday into Thursday. The
most likely periods for strongest valley winds will be Wednesday
and again Thursday afternoon. The period between will have heavy
precipitation which will dampen the wind speeds, however erratic
stronger gusts remain possible. Periods of snow showers are
possible for all airports Friday afternoon through Sunday morning
with the potential for minor accumulations, especially from 03z-
15z. -Dawn
&&
.REV Watches/Warnings/Advisories...
NV...Winter Storm Watch from Wednesday afternoon through late
Thursday night above 7000 feet in NVZ002.
CA...Winter Storm Watch from Wednesday afternoon through late
Thursday night above 7500 feet in CAZ073.
Winter Storm Watch from Wednesday afternoon through late
Thursday night above 7000 feet in CAZ072.
&&
For more information from the National Weather Service visit...
http://weather.gov/renoThe office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 20, 12:49 PM PDT | Lake Wind Advisory | REV | Alpine, El Dorado, Nevada, Placer | 55 hr |
| Mar 20, 2:24 PM PDT | Flood Watch | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 48 hr |
Nearby
Winter Storm Warnings in California, 2018Winter Storm Warnings in Nevada, 2018Every winter storm warning in 2018
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.