Alert archive / California / Winter Storm Warnings in 2020

Winter Storm Warning 3, NWS Reno, NV

April 3, 2020Douglas County, Washoe County, Nevada; 8 counties in California

NWS Reno, NV issued this winter storm warning at Apr 3, 2020, 3:32 PM PDT for Douglas County, Washoe County, Nevada; 8 counties in California. It took effect at Apr 4, 2020, 2:00 PM PDT. It was in force for 46 hr. 46 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
Apr 3, 2020, 3:32 PM PDT (22:32 UTC)
In effect from
Apr 4, 2020, 2:00 PM PDT
Expired
Apr 6, 2020, 12:00 PM PDT
In force
46 hr
Issued by
NWS Reno, NV

Counties Alpine County, CA, El Dorado County, CA, Lassen County, CA, Mono County, CA, Nevada County, CA, Placer County, CA, Plumas County, CA, Sierra County, CA, Douglas County, NV, Washoe County, NV

The radar

The Reno radar (KRGX), 77 km from the middle of the area, began a volume at 22:33 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

TimeReportWhereRemark
Apr 5, 8:00 AM PDTSNOW 18Soda Springs, CACOCORAHS OBSERVER REPORTED 18 INCHES OF NEW SNOW 1.5 SSW OF SODA SPRINGS. ELEVATION 6,768 FEET.
Apr 5, 10:00 AM PDTSNOW 1.53 E Beckwourth, CACOCORAHS STATION CA-PM-9 BECKWOURTH 3.3 E.
Apr 5, 10:30 AM PDTHEAVY SNOW 123 Se Lake Davis, CA12 INCHES AT LAKE DAVIS SATURDAY NIGHT THROUGH SUNDAY MORNING.
Apr 5, 3:26 PM PDTSNOW 2Camino, CATWO INCHES OF SNOW AT POLLOCK PINES EL 3800 FEET AND CAMINO EL 3100 FEET
Apr 6, 6:00 AM PDTSNOW 6Chester, CAA COOP OBSERVER IN CHESTER MEASURED A STORM TOTAL OF 6 INCHES OVER 48 HOURS, 5 INCHES OVER THE PAST 24 HOURS, AT ELEVATION 2,900 FEET.
Apr 6, 7:28 AM PDTHEAVY SNOW 9.52 Nw Meyers, CA
Apr 6, 7:30 AM PDTHEAVY SNOW 1.84 Ssw Reno, NVMCCARREN AND CAUGHLIN PKWY.
Apr 6, 7:30 AM PDTSNOW 2.55 S Reno, NVCOCORAHS STATION NV-WH-35 RENO 4.5 S.
Apr 6, 7:32 AM PDTHEAVY SNOW 43 Sse Spanish Springs, NV3-4 INCHES.
Apr 6, 7:34 AM PDTSNOW 26 N Washoe City, NV1-2 INCHES OVERNIGHT.
Apr 6, 7:39 AM PDTSNOW 2.52 Ssw Sun Valley, NV2.5 INCHES AT NWS RENO MIDNIGHT TO 5AM.
Apr 6, 7:41 AM PDTSNOW 17 Ne Washoe City, NV1 INCH OVERNIGHT.
Apr 6, 7:42 AM PDTSNOW 1.34 Ssw Sparks, NV1.3 INCHES OVERNIGHT AT THE RENO-TAHOE INTERNATIONAL AIRPORT.
Apr 6, 7:45 AM PDTSNOW 0.25 Se Toms Place, CACOCORAHS STATION CA-MN-4 WEST BISHOP 14.4 NW.
Apr 6, 7:45 AM PDTSNOW 21 Ne Sparks, NVCOCORAHS STATION NV-WH-87 SPARKS 1.5 NE.
Apr 6, 7:45 AM PDTHEAVY SNOW 161 Wnw Mammoth Lakes, CAMAMMOTH LAKES 7600FT. 16 INCHES AS OF 7AM. STILL SNOWING.
Apr 6, 7:52 AM PDTHEAVY SNOW 301 Ssw Mammoth Mountain, CA30 INCHES AT MAMMOTH MOUNTAIN SNOW STUDY SITE IN THE LAST 24 HOURS.
Apr 6, 7:54 AM PDTHEAVY SNOW 53 Ne Sparks, NV4-5 INCHES IN SPARKS NEAR LOS ALTOS.
Apr 6, 7:57 AM PDTHEAVY SNOW 2.51 Ssw Spanish Springs, NV2.5 INCHES IN SPARKS/SPANISH SPRINGS OVERNIGHT.
Apr 6, 8:00 AM PDTSNOW 0.33 Ssw Susanville, CACOCORAHS STATION CA-LS-1 SUSANVILLE 3.2 SSW.
Apr 6, 8:00 AM PDTSNOW 11 Sw Toms Place, CACOCORAHS STATION CA-MN-5 MAMMOTH LAKES 16.3 ESE.
Apr 6, 8:00 AM PDTSNOW 1.69 Nne Cold Springs Vall, NVCOCORAHS STATION NV-WH-79 RENO 17.8 NNW.
Apr 6, 8:00 AM PDTSNOW 2.53 Sse Spanish Springs, NVCOCORAHS STATION NV-WH-166 SPARKS 3.2 NE.
Apr 6, 8:00 AM PDTSNOW 3.11 Nne Reno, NVCOCORAHS STATION NV-WH-2 RENO 1.4 NNE.
Apr 6, 8:00 AM PDTSNOW 9.52 Nw Meyers, CACOCORAHS STATION CA-ED-20 SOUTH LAKE TAHOE 4.9 SW.
Apr 6, 8:00 AM PDTSNOW 10.52 N Truckee, CACOCORAHS STATION CA-NV-51 TRUCKEE 1.6 N.
Apr 6, 8:10 AM PDTHEAVY SNOW 131 Nnw Incline Village, NV13 INCHES STORM TOTAL INCLINE VILLAGE 7600FT.
Apr 6, 8:16 AM PDTSNOW 4.33 Nnw Northstar, CA4.3 INCHES 24 HOURS SNOWFALL AT KTRK TRUCKEE-TAHOE AIRPORT.
Apr 6, 8:24 AM PDTSNOW 11 Sw Toms Place, CA.13 LIQUID EQUIVALENT. TOMS PLACE.
Apr 6, 8:33 AM PDTSNOW 351 Ssw Mammoth Mountain, CA8900FT. 39 INCHES STORM TOTAL 48 HOURS.
Apr 6, 8:50 AM PDTSNOW 8Dagget Pass, NV8 INCHES IN THE LAST 24 HOURS AT DAGGET PASS.
Apr 6, 9:00 AM PDTSNOW 24 Ene Verdi, NVCOCORAHS STATION NV-WH-105 RENO 5.4 W.
Apr 6, 9:00 AM PDTSNOW 2.12 Sse Reno, NVCOCORAHS STATION NV-WH-130 RENO 1.6 SE.
Apr 6, 9:00 AM PDTSNOW 2.57 Nne Washoe City, NVCOCORAHS STATION NV-WH-39 RENO 8.4 SSE.
Apr 6, 9:00 AM PDTSNOW 43 E Stead, NVCOCORAHS STATION NV-WH-165 RENO 7.1 N.
Apr 6, 9:00 AM PDTSNOW 12 Wsw Camino, CAA COCORAHS OBSERVER 2 WSW CAMINO MEASURED 1 INCH OF SNOW OVER 24 HOURS, ELEVATION 2,900 FEET.
Apr 6, 9:00 AM PDTSNOW 7Pacific House, CAA COOP OBSERVER AT PACIFIC HOUSE REPORTED 7 INCHES OF SNOW OVER 24 HOURS, ELEVATION 3,400 FEET.
Apr 6, 9:00 AM PDTHEAVY SNOW 10Kyburz, CAA TRAINED STORM SPOTTER MEASURED 10 INCHES OF SNOW IN KYBURZ OVER 24 HOURS, ELEVATION 4,000 FEET.
Apr 6, 9:00 AM PDTHEAVY SNOW 28Kingvale, CACALTRANS REPORTED A STORM TOTAL OF 28 INCHES OF SNOW AT THEIR MAINTENANCE YARD IN KINGVALE AT AN ELEVATION OF 6,100 FEET.
Apr 6, 9:00 AM PDTHEAVY SNOW 311 Nw Soda Springs, CACALTRANS MEASURED A STORM TOTAL OF 31 INCHES OF SNOW AT SODA SPIRNGS, ELEVATION 6,800 FEET.
Apr 6, 9:00 AM PDTHEAVY SNOW 341 Nw Lake Alpine, CASTORM TOTAL OF 34 INCHES REPORTED BY CALTRANS AT HWY 207 SUMMIT AT 8,000 FEET.
Apr 6, 9:15 AM PDTSNOW 22 E Sparks, NVCOCORAHS STATION NV-WH-31 SPARKS 1.7 E.
Apr 6, 9:19 AM PDTSNOW 21 N Spaulding, CAEAGLE LAKE 2 INCHES SNOWFALL.
Apr 6, 9:20 AM PDTSNOW 101 Nnw Homewood, CA10 INCHES HOMEWOOD, CA.
Apr 6, 9:34 AM PDTSNOW 61 S Glenbrook, NVGLENBROOK LAKE TAHOE. 6 INCHES SNOWFALL 24 HOURS.
Apr 6, 9:48 AM PDTSNOW 71 Ne Incline Village, NVINCLINE VILLAGE 6700FT. 7 INCHES SNOWFALL.

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, 10.5 hours before the alert went out and 173 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.

Skew-T log-pSkew-T log-p diagram, Reno, NV at 12:00Z on 2020-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Reno, NV at 12:00Z on 2020-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2343 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
107 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

292 
WWUS45 KREV 032232
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
332 PM PDT Fri Apr 3 2020

CAZ071-050000-
/O.UPG.KREV.WS.A.0003.200405T0000Z-200406T1800Z/
/O.NEW.KREV.WS.W.0003.200404T2100Z-200406T1200Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
332 PM PDT Fri Apr 3 2020

...WINTER STORM WARNING IN EFFECT FROM 2 PM SATURDAY TO 5 AM PDT
MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of up to 4
  inches, except 8 to 15 inches above 5000 feet west of highway
  395. Amounts of 15 to 24 inches possible for the Yuba Pass  
  area. Winds gusting as high as 45 mph Saturday.

* WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties.

* WHEN...From 2 PM Saturday to 5 AM PDT Monday.

* IMPACTS...Travel could be very difficult with long delays for
  routes 36, 49, and 89. The heaviest snow is forecast to arrive
  Sunday.

* ADDITIONAL DETAILS...Road conditions may improve Saturday night
  before deteriorating again Sunday morning.

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.

&&

$$

CAZ072-NVZ002-050000-
/O.UPG.KREV.WS.A.0003.200405T0000Z-200406T1800Z/
/O.NEW.KREV.WS.W.0003.200404T2100Z-200406T1900Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, 
and Incline Village
332 PM PDT Fri Apr 3 2020

...WINTER STORM WARNING IN EFFECT FROM 2 PM SATURDAY TO NOON PDT
MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 12
  inches, except 1 to 2 feet above 7000 feet as well as west of
  Highway 89. Higher amounts possible along the Sierra crest.
  Winds could gust as high as 45 mph in the lower elevations and 
  up to 90 mph over Sierra ridges.

* WHERE...Greater Lake Tahoe Area.

* WHEN...From 2 PM Saturday to noon PDT Monday.

* IMPACTS...Travel could be very difficult with very long delays
  possible over Interstate 80, Highway 50, and 88. The heaviest
  snow is forecast to occur Sunday.

* ADDITIONAL DETAILS...Travel in the Sierra is strongly
  discouraged this weekend. Stay home, be safe.

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.

&&

$$

CAZ073-050000-
/O.UPG.KREV.WS.A.0003.200405T1800Z-200406T1800Z/
/O.NEW.KREV.WS.W.0003.200405T1900Z-200406T1900Z/
Mono County-
Including the cities of Bridgeport, Coleville, and Mammoth Lakes
332 PM PDT Fri Apr 3 2020

...WINTER STORM WARNING IN EFFECT FROM NOON SUNDAY TO NOON PDT
MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of up to 6
  inches above 5500 feet, with 1 to 2 feet along and west of
  Highway 395 above 7000 feet. Winds could gust as high as 50 mph
  in the lower elevations and up to 90 mph over Sierra ridges.

* WHERE...Mono County.

* WHEN...From noon Sunday to noon PDT Monday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning commute. Very strong winds 
  could cause extensive tree damage.

* ADDITIONAL DETAILS...Travel in the Sierra is strongly
  discouraged this weekend. Please stay home, be safe.


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
6 follow-up statements
202 
WWUS45 KREV 042209
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
309 PM PDT Sat Apr 4 2020

CAZ071-060000-
/O.CON.KREV.WS.W.0003.000000T0000Z-200406T1200Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
309 PM PDT Sat Apr 4 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT MONDAY...

* CHANGES...None.

* WHAT...Heavy snow expected. Total snow accumulations of up to 4
  inches, except 8 to 15 inches above 5000 feet west of Highway 
  395. Amounts of 15 to 24 inches possible for the Yuba Pass area.
 
* WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties.

* WHEN...Until 5 AM PDT Monday.

* IMPACTS...Travel could be very difficult with long delays for 
  routes 36, 49, and 89. The heaviest snow is forecast to arrive 
  Sunday.

* ADDITIONAL DETAILS...Road conditions may remain wet or just
  lightly covered Saturday night before deteriorating
  significantly Sunday morning.

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.

&&

$$

CAZ072-NVZ002-060000-
/O.CON.KREV.WS.W.0003.000000T0000Z-200406T1900Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, 
and Incline Village
309 PM PDT Sat Apr 4 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON PDT MONDAY...

* CHANGES...None.

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 12
  inches, except 1 to 2 feet above 7000 feet as well as west of
  Highway 89. Higher amounts up to around 3 feet possible along 
  the Sierra crest. Winds could gust as high as 45 mph in the 
  lower elevations and up to 90 mph over Sierra ridges.

* WHERE...Greater Lake Tahoe Area.

* WHEN...Until noon PDT Monday.

* IMPACTS...Travel could be very difficult with very long delays 
  possible over Interstate 80, Highway 50, and 88. The heaviest 
  snow is forecast to occur Sunday and Sunday night.

* ADDITIONAL DETAILS...Travel in the Sierra is strongly 
  discouraged this weekend. Stay home, be safe.

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.

&&

$$

CAZ073-060000-
/O.CON.KREV.WS.W.0003.200405T1900Z-200406T1900Z/
Mono County-
Including the cities of Bridgeport, Coleville, and Mammoth Lakes
309 PM PDT Sat Apr 4 2020

...WINTER STORM WARNING REMAINS IN EFFECT FROM NOON SUNDAY TO
NOON PDT MONDAY...

* CHANGES...None.

* WHAT...Heavy snow expected. Total snow accumulations of up to 6
  inches above 5500 feet, with 1 to 2 feet along and west of
  Highway 395 above 7000 feet. Local amounts to 3 feet possible at 
  the crest. Winds could gust as high as 50 mph in the lower 
  elevations and up to 90 mph over Sierra ridges.

* WHERE...Mono County.

* WHEN...From noon Sunday to noon PDT Monday.

* IMPACTS...Travel could be very difficult. Strong winds could
  cause some tree damage.

* ADDITIONAL DETAILS...Travel in the Sierra is strongly 
  discouraged this weekend. Please stay home, be safe.

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
381 
WWUS45 KREV 050324
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
824 PM PDT Sat Apr 4 2020

CAZ071-060000-
/O.CON.KREV.WS.W.0003.000000T0000Z-200406T1200Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
824 PM PDT Sat Apr 4 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT MONDAY...

* CHANGES...None.

* WHAT...Heavy snow expected. Total snow accumulations of up to 4
  inches, except 8 to 15 inches above 5000 feet west of Highway 
  395. Amounts of 15 to 24 inches possible for the Yuba Pass area.

* WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties.

* WHEN...Until 5 AM PDT Monday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning commute.

* ADDITIONAL DETAILS...Road conditions may remain wet or just
  lightly covered tonight before deteriorating significantly 
  Sunday morning.

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.

&&

$$

CAZ072-NVZ002-060000-
/O.CON.KREV.WS.W.0003.000000T0000Z-200406T1900Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, 
and Incline Village
824 PM PDT Sat Apr 4 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON PDT MONDAY...

* CHANGES...Increased total snow accumulations.

* WHAT...Heavy snow expected. Total snow accumulations of 8 to 16
  inches, except 2 to 3 feet above 7000 feet as well as west of
  Highway 89. Higher amounts up to around 4 feet possible along 
  the Sierra crest. Winds could gust as high as 45 mph in the 
  lower elevations and up to 90 mph over Sierra ridges.

* WHERE...Greater Lake Tahoe Area.

* WHEN...Until noon PDT Monday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning commute. Strong 
  winds could cause tree damage.

* ADDITIONAL DETAILS...Travel could be very difficult with very
  long delays possible over Interstate 80, Highway 50, and 88. The
  heaviest snow is forecast to occur Sunday and Sunday night.

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.

&&

$$

CAZ073-060000-
/O.CON.KREV.WS.W.0003.200405T1900Z-200406T1900Z/
Mono County-
Including the cities of Bridgeport, Coleville, and Mammoth Lakes
824 PM PDT Sat Apr 4 2020

...WINTER STORM WARNING REMAINS IN EFFECT FROM NOON SUNDAY TO
NOON PDT MONDAY...

* CHANGES...None.

* WHAT...Heavy snow expected. Total snow accumulations of up to 6
  inches above 5500 feet, with 1 to 2 feet along and west of
  Highway 395 above 7000 feet. Local amounts to 3 feet possible at 
  the crest. Winds could gust as high as 50 mph in the lower 
  elevations and up to 90 mph over Sierra ridges.

* WHERE...Mono County.

* WHEN...From noon Sunday to noon PDT Monday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning commute. Gusty winds could 
  bring down tree branches.

* ADDITIONAL DETAILS...Travel in the Sierra is strongly 
  discouraged this weekend. Please stay home, be safe.

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
508 
WWUS45 KREV 051046
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
346 AM PDT Sun Apr 5 2020

CAZ071-061100-
/O.CON.KREV.WS.W.0003.000000T0000Z-200406T1200Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
346 AM PDT Sun Apr 5 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT MONDAY...

* CHANGES...None.

* WHAT...Heavy snow expected. Additional accumulations of up to 4
  inches, except 6 to 12 inches above 5000 feet west of Highway
  395 and 12 to 24 inches possible for the Yuba Pass area.

* WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties.

* WHEN...Until 5 AM PDT Monday.

* IMPACTS...Travel will be very difficult, especially along
  Highway 89 and portions of highway 36 and 44.

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.

&&

$$

CAZ072-NVZ002-061100-
/O.CON.KREV.WS.W.0003.000000T0000Z-200406T1900Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, 
and Incline Village
346 AM PDT Sun Apr 5 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON PDT MONDAY...

* CHANGES...None.

* WHAT...Heavy snow expected. Additional snow accumulations of 8
  to 16 inches, except 1 to 3 feet above 7000 feet. Winds could 
  gust as high as 45 mph in the lower elevations and up to 90 mph 
  over Sierra ridges.

* WHERE...Greater Lake Tahoe Area.

* WHEN...Until noon PDT Monday.

* IMPACTS...Travel will be very difficult with very long delays  
  over Interstate 80, Highway 50, and 88. Gusty winds could bring 
  down tree branches.

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.

&&

$$

CAZ073-061100-
/O.CON.KREV.WS.W.0003.200405T1900Z-200406T1900Z/
Mono County-
Including the cities of Bridgeport, Coleville, and Mammoth Lakes
346 AM PDT Sun Apr 5 2020

...WINTER STORM WARNING REMAINS IN EFFECT FROM NOON TODAY TO NOON
PDT MONDAY...

* CHANGES...None.

* WHAT...Heavy snow expected. Total snow accumulations of up to 
  6 inches above 5500 feet, with 1 to 2 feet along and west of 
  Highway 395 above 7000 feet. Local amounts to 3 feet possible 
  at the crest. Winds could gust as high as 50 mph in the lower 
  elevations and up to 90 mph over Sierra ridges.

* WHERE...Mono County.

* WHEN...From noon today to noon PDT Monday.

* IMPACTS...Travel could be very difficult at times along Highway
  395 later today and tonight. Gusty winds could bring down tree 
  branches.

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
716 
WWUS45 KREV 051649
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
949 AM PDT Sun Apr 5 2020

CAZ071-060000-
/O.CON.KREV.WS.W.0003.000000T0000Z-200406T1200Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
949 AM PDT Sun Apr 5 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT MONDAY...

* CHANGES...None.

* WHAT...Heavy snow expected. Additional accumulations of up to 
  4 inches, except 6 to 12 inches above 5000 feet west of 
  Highway 395 and 12 to 24 inches possible for the Yuba Pass 
  area.

* WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties.

* WHEN...Until 5 AM PDT Monday.

* IMPACTS...Travel will be very difficult, especially along 
  Highway 89 and portions of highway 36 and 44.

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.

&&

$$

CAZ072-NVZ002-060000-
/O.CON.KREV.WS.W.0003.000000T0000Z-200406T1900Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, 
and Incline Village
949 AM PDT Sun Apr 5 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON PDT MONDAY...

* CHANGES...None.

* WHAT...Heavy snow expected. Additional snow accumulations of 8 
  to 16 inches, except 1 to 3 feet above 7000 feet. Winds could 
  gust as high as 45 mph in the lower elevations and up to 90 
  mph over Sierra ridges.

* WHERE...Greater Lake Tahoe Area.

* WHEN...Until noon PDT Monday.


* IMPACTS...Travel will be very difficult with very long delays 
  over Interstate 80, Highway 50, and 88. Gusty winds could 
  bring down tree branches.

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.

&&

$$

CAZ073-060000-
/O.CON.KREV.WS.W.0003.200405T1900Z-200406T1900Z/
Mono County-
Including the cities of Bridgeport, Coleville, and Mammoth Lakes
949 AM PDT Sun Apr 5 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON PDT MONDAY...

* CHANGES...None.

* WHAT...Heavy snow expected. Total snow accumulations of up to 
  6 inches above 5500 feet, with 1 to 2 feet along and west of 
  Highway 395 above 7000 feet. Local amounts to 3 feet possible 
  at the crest. Winds could gust as high as 50 mph in the lower 
  elevations and up to 90 mph over Sierra ridges.

* WHERE...Mono County.

* WHEN...From noon today to noon PDT Monday.

* IMPACTS...Travel could be very difficult at times along 
  Highway 395 later today and tonight. Gusty winds could bring 
  down tree branches.

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.

&&

$$

NVZ003-060000-
/O.NEW.KREV.WW.Y.0009.200406T0700Z-200406T1800Z/
Greater Reno-Carson City-Minden Area-
Including the cities of Sparks, Gardnerville, and Virginia City
949 AM PDT Sun Apr 5 2020

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
11 AM PDT MONDAY...

* WHAT...Snow expected. Snow accumulations of up to 1 inch for
  valley floors below 5000 feet. 1 to 3 inches for foothills and
  communities above 5000 feet including North Valleys, Washoe
  Valley, and Virginia City/Highlands. 

* WHERE...Greater Reno-Carson City-Minden Area.

* WHEN...From midnight tonight to 11 AM PDT Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning commute.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Even light snowfall can result in significant travel delays. 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
721 
WWUS45 KREV 052125
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
225 PM PDT Sun Apr 5 2020

CAZ071-061200-
/O.CON.KREV.WS.W.0003.000000T0000Z-200406T1200Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
225 PM PDT Sun Apr 5 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT MONDAY...

* CHANGES...Updated additional snowfall accumulations.

* WHAT...Moderate to heavy snow. Additional accumulations of up 
  to 2 inches, except 3 to 7 inches above 5000 feet west of 
  Highway 395.

* WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties.

* WHEN...Until 5 AM PDT Monday.

* IMPACTS...Travel will be very difficult, especially along 
  Highway 89 and portions of highway 36 and 44.

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.

&&

$$

CAZ072-NVZ002-061200-
/O.CON.KREV.WS.W.0003.000000T0000Z-200406T1900Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, 
and Incline Village
225 PM PDT Sun Apr 5 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON PDT MONDAY...

* CHANGES...Updated additional snowfall accumulations.

* WHAT...Heavy snow expected. Additional snow accumulations of 4
  to 8 inches, except 6 to 12 inches above 7000 feet with up to 18
  inches along the crest. Winds could gust as high as 45 mph in
  the lower elevations and up to 100 mph over Sierra ridges.

* WHERE...Greater Lake Tahoe Area.

* WHEN...Until noon PDT Monday.

* IMPACTS...Travel will be very difficult with very long delays 
  over Interstate 80, Highway 50, and 88. Gusty winds could 
  bring down tree branches.

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.

&&

$$

CAZ073-061200-
/O.CON.KREV.WS.W.0003.000000T0000Z-200406T1900Z/
Mono County-
Including the cities of Bridgeport, Coleville, and Mammoth Lakes
225 PM PDT Sun Apr 5 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON PDT MONDAY...

* CHANGES...Updated additional snowfall accumulations.

* WHAT...Heavy snow expected. Additional snow accumulations of up
  to 5 inches above 5500 feet, with 1 to 2 feet along and west of
  Highway 395 above 7000 feet. Winds could gust as high as 50 mph
  in the lower elevations and up to 100 mph over Sierra ridges.

* WHERE...Mono County.

* WHEN...From noon today to noon PDT Monday.

* IMPACTS...Travel could be very difficult at times along 
  Highway 395 later today and tonight. Gusty winds could bring 
  down tree branches.

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.

&&

$$

NVZ003-061200-
/O.CON.KREV.WW.Y.0009.200406T0700Z-200406T1800Z/
Greater Reno-Carson City-Minden Area-
Including the cities of Sparks, Gardnerville, and Virginia City
225 PM PDT Sun Apr 5 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO 11 AM PDT MONDAY...

* WHAT...Snow expected. Snow accumulations less than 1 inch for
  valley floors below 5000 feet. 1 to 3 inches possible for 
  foothills and communities above 5000 feet including North 
  Valleys, Washoe Valley, and Virginia City/Highlands.

* WHERE...Greater Reno-Carson City-Minden Area.

* WHEN...From midnight tonight to 11 AM PDT Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Even light snowfall can result in significant travel delays. 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
794 
WWUS45 KREV 061127
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
427 AM PDT Mon Apr 6 2020

CAZ072-NVZ002-061900-
/O.CAN.KREV.WS.W.0003.000000T0000Z-200406T1900Z/
/O.EXB.KREV.WW.Y.0009.000000T0000Z-200406T1900Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, and
Incline Village
427 AM PDT Mon Apr 6 2020

...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON PDT TODAY...

* CHANGES...Replaced the warning with a Winter Weather Advisory.
  Lowered additional snow accumulations but mentioned icy patches
  this morning. 

* WHAT...Snow. Additional snow accumulations up to 2 inches.

* WHERE...Greater Lake Tahoe Area.

* WHEN...Until noon PDT today.

* IMPACTS...Plan on slippery road conditions with icy patches
  through mid morning. The hazardous conditions will impact the 
  morning commute.

* ADDITIONAL DETAILS...

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.

&&

$$

CAZ071-061800-
/O.CAN.KREV.WS.W.0003.000000T0000Z-200406T1200Z/
/O.EXA.KREV.WW.Y.0009.000000T0000Z-200406T1800Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
427 AM PDT Mon Apr 6 2020

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 11 AM PDT THIS
MORNING...

* CHANGES...Replaced the warning with a Winter Weather Advisory.
  Lowered additional snow accumulations but mentioned icy patches
  on roads this morning.

* WHAT...Snow. Additional snow accumulations of up to 2 inches.

* WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties.

* WHEN...Until 11 AM PDT this morning.

* IMPACTS...Plan on slippery road conditions with icy patches also
  developing early this morning in lower elevations, especially on
  bridges and overpasses. The hazardous conditions will impact 
  the morning commute.

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.

&&

$$

CAZ073-061900-
/O.CON.KREV.WS.W.0003.000000T0000Z-200406T1900Z/
Mono County-
Including the cities of Bridgeport, Coleville, and Mammoth Lakes
427 AM PDT Mon Apr 6 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON PDT TODAY...

* CHANGES...Lowered additional snow accumulations and removed wind
  impacts.

* WHAT...Heavy snow. Additional snow accumulations of 2 to 6
  inches, mainly from US-395 westward.

* WHERE...Mono County.

* WHEN...Until noon PDT today.

* IMPACTS...Travel could be very difficult at times along Highway
  395 through this morning. 

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.

&&

$$

NVZ003-061800-
/O.CON.KREV.WW.Y.0009.000000T0000Z-200406T1800Z/
Greater Reno-Carson City-Minden Area-
Including the cities of Sparks, Verdi, Gardnerville, 
and Virginia City
427 AM PDT Mon Apr 6 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM PDT THIS
MORNING...

* CHANGES...Lowered additional snow accumulations but mentioned
  icy patches on roads this morning.

* WHAT...Snow. Additional snow accumulations of up to one inch.

* WHERE...Greater Reno-Carson City-Minden Area.

* WHEN...Until 11 AM PDT this morning.

* IMPACTS...Plan on slippery road conditions with icy patches 
  also developing early this morning in lower elevations, 
  especially on bridges and overpasses. The hazardous conditions 
  will impact the morning commute.

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 Apr 3, 3:15 PM PDT, 17 minutes earlier.

Area forecast discussion, Apr 3, 3:15 PM PDT, 17 minutes before
Area Forecast Discussion
National Weather Service Reno NV
315 PM PDT Fri Apr 3 2020

.SYNOPSIS...

Active weather returns Saturday into early next week as two storms
bring gusty winds, heavy mountain snow, chances for valley rain
and snow, and cooler temperatures. Low pressure could linger through
much of next week, bringing the continued chance for showers.

&&

.SHORT TERM...

SUMMARY:

* Sierra and northeast CA: Winter storm watches have been
  upgrading to warnings. Expect significant travel (if you MUST
  travel...otherwise stay home!) issues over the Sierra and
  periodically for portions of northeast CA this weekend,
  especially by Sunday.

* For western and west-central NV: Gusty winds are expected
  Saturday/Sunday, especially in the afternoon and evening. Shower
  chances Saturday, mainly in the immediate lee of the Sierra as
  well as north of Interstate 80, will expand across the rest of
  the area later Sunday into Monday morning. LIGHT SNOWFALL IN
  VALLEYS POSSIBLE SUNDAY NIGHT INTO MONDAY MORNING.

Quiet weather will continue into early Saturday before the first
and weaker of two systems affects the region. By late morning
Saturday into the afternoon, snow and lower elevation rain and
snow will move into northeast CA and northwest NV. The system
remains a quick hitter and will exit into Oregon by evening;
however, it is fairly potent and is expected to bring a burst of
precipitation. The heaviness of the precipitation will be key with
regard to travel impacts for the Sierra from about Hwy 50 north
and for northeast California above ~5000-5500 feet (below that
snow unlikely to stick to roads). With dry roads routinely
heating to 30+ degrees above the air temperature this time of
year, the precipitation rates will have to be heavy to get snow to
stick to roads given the daytime arrival of snow. With a burst
expected, one could expect at least a slushy road coverage before
precipitation decreases in intensity Saturday evening (when snow
may melt off roads). With moist upslope flow and snow showers
continuing in northeast CA and the Sierra Saturday night and the
more potent system arriving by Sunday morning, it was decided to
start the winter storm warning Saturday afternoon despite the
potential for a period of improved roads Saturday night.

For the lowest elevations of northeast CA and out into far western
and northwestern NV, scattered showers will be possible as the
wave goes by Saturday afternoon. However, the main story will be
winds with widespread gusts 30-45 mph in the afternoon and
evening...which may be of concern for high-profile vehicles,
especially for wind-prone spots along Highway 395/I-580.

The stronger storm system arrives Sunday into Monday, with the
main period of travel issues for the Sierra and northeast CA
expected as the low drops slowly south along the West Coast.
Snowfall expectations have not changed much today with a
significant snowfall expected in the Sierra (including Mono
County) and above 5000 feet in northeast California, especially
south and west of Susanville. One to two feet of snow, locally
higher, are possible near the crest...see the winter storm warning
for more details of expected amounts.

East of the Sierra, expect another windy day as surface low
pressure intensifies over central NV. Peak wind gusts of 35-45 mph
are expected with locally higher numbers in wind-prone spots along
Highways 395 and 95. As the upper low approaches Sunday night into
Monday morning, the main shot for snow impacts out into western NV
will commence. At this time, areas above 5000 feet will have the
best shot at lightly snow-covered roads; however, details need to
be ironed out yet so stay tuned. -Snyder

.LONG TERM...Monday to Friday...

Main story for next week will be how much time the upper level low
pressure system decides to spend with us. At this time, the low is
in no hurry to depart which means there could be an extended period
of intermittent mountain snow showers with valley rain and snow
pellet showers. Enough lingering instability will be present to
allow for a 10-20% chance of thunderstorms mainly in the afternoon
and early evening hours.

Some uncertainty exist with how far north this banding of showers on
the backside of the low will reach. From a timing perspective the
banding could remain near the I-80 corridor through Tuesday evening
with the best prospects shifting south through midweek across Mono
and Mineral counties. Could see some lingering showers even into
Thursday before the low finally kicks out to the east. Temperatures
will remain cool under the low through about midweek, but should
gradually warm for the second half of the week as upper level
ridging begins to build along the West Coast. Fuentes

&&

.AVIATION...

Modest surface breezes have developed this afternoon with some
light chop over and just east of the Sierra per PIREPs. Winds will
diminish for terminals tonight ahead of stronger winds Saturday.

A couple late season winter storms will push through the region
Saturday and Sunday/Monday. Winds look strongest Saturday afternoon
so be prepared for the usually mountain wave turbulence in and
our of the region. MVFR/IFR/LIFR conditions likely for Lassen to
the Tahoe Basin Saturday PM then most of the Sierra Sunday-Monday.
Across western NV precipitation may be just a few light showers
Saturday (VFR) with high elevation terrain possibly obscured
briefly. A period of rain/snow is likely Sunday into early
Monday with lower CIGS/VIS possible along with extensive terrain
obscuration. -Snyder/Brong

&&

.REV Watches/Warnings/Advisories...
NV...Winter Storm Warning from 2 PM Saturday to noon PDT Monday
     NVZ002.

     Lake Wind Advisory from 1 PM to 8 PM PDT Saturday for Pyramid
     Lake in NVZ004.

CA...Winter Storm Warning from 2 PM Saturday to 5 AM PDT Monday
     CAZ071.

     Winter Storm Warning from noon Sunday to noon PDT Monday CAZ073.

     Winter Storm Warning from 2 PM Saturday to noon PDT Monday
     CAZ072.

&&

For more information from the National Weather Service visit...
http://weather.gov/reno

The office that day

Everything else NWS Reno, NV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 3, 3:35 PM PDTLake Wind AdvisoryREVChurchill, Lyon, Pershing, Washoe28 hr

Nearby

Winter Storm Warnings in California, 2020Winter Storm Warnings in Nevada, 2020Every winter storm warning in 2020

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.