Alert archive / California / Winter Storm Warnings in 2017

Winter Storm Warning 11, NWS Reno, NV

April 6, 2017Douglas County, Washoe County, Nevada; 8 counties in California

NWS Reno, NV issued this winter storm warning at Apr 6, 2017, 11:11 AM PDT for Douglas County, Washoe County, Nevada; 8 counties in California. It took effect at Apr 7, 2017, 12:00 AM PDT. It was in force for 39 hr. 40 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 6, 2017, 11:11 AM PDT (18:11 UTC)
In effect from
Apr 7, 2017, 12:00 AM PDT
Expired
Apr 8, 2017, 2:48 PM PDT
In force
39 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 18:14 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 7, 6:13 AM PDTHEAVY SNOW 121 Ssw June Lake, CAJUNE MOUNTAIN SKI RESORT REPORTED 12 INCHES OF NEW SNOW IN THE PAST 24 HOURS.
Apr 7, 6:29 AM PDTHEAVY SNOW 121 Sw Alpine Meadows, CAALPINE MEADOWS SKI RESORT REPORTED 12 INCHES OF NEW SNOW IN THE PAST 24 HOURS.
Apr 7, 6:30 AM PDTHEAVY SNOW 122 Nw Alpine Meadows, CASQUAW VALLEY SKI RESORT REPORTED 12 INCHES OF NEW SNOW IN THE PAST 24 HOURS.
Apr 7, 6:35 AM PDTHEAVY SNOW 135 Wnw Kings Beach, CANORTHSTAR SKI RESORT REPORTED 13 INCHES OF NEW SNOW IN THE PAST 24 HOURS.
Apr 7, 6:37 AM PDTHEAVY SNOW 9Nne Homewood, CAHOMEWOOD MOUNTAIN RESORT REPORTED 9 INCHES OF NEW SNOW ON THE UPPER MOUNTAIN IN THE PAST 24 HOURS.
Apr 7, 7:15 AM PDTSNOW 33 Ese South Lake Tahoe, CAHEAVENLY SKI RESORT REPORTED 3 INCHES OF NEW SNOW IN THE PAST 24 HOURS.
Apr 7, 7:20 AM PDTSNOW 43 E Incline Village, NVDIAMOND PEAK SKI RESORT REPORTED 4 INCHES OF NEW SNOW IN THE PAST 24 HOURS.
Apr 7, 7:37 AM PDTSNOW 3.51 Ne Incline Village, NVA TRAINED WEATHER SPOTTER NEAR INCLINE VILLAGE REPORTED 3.5 INCHES OF NEW SNOW SINCE MIDNIGHT AT AN ELEVATION OF 6700 FEET.
Apr 8, 6:31 AM PDTSNOW 4.55 Wnw Susanville, CACOMPACTED DOWN TO 4 INCHES.
Apr 8, 7:00 AM PDTSNOW 0.41 Nne Reno, NVCOCORAHS OBSERVER REPORTED 0.4 INCHES OF SNOWFALL WITH A SNOW WATER EQUIVALENT OF 0.08 INCHES. TOTAL PRECIPITATION OF 0.24 INCHES IN THE PAST 24 HOURS. ELEVATION 4670 FEET.
Apr 8, 7:00 AM PDTSNOW 0.83 Nne Minden-Tahoe Airp, NVCOCORAHS OBSERVER REPORTED 0.8 INCHES OF SNOWFALL WITH A SNOW WATER EQUIVALENT OF 0.10 INCHES. TOTAL PRECIPITATION OF 0.67 INCHES.
Apr 8, 7:30 AM PDTSNOW 1Golden Valley, NVPUBLIC REPORTED 1 INCH OF NEW SNOWFALL NEAR GOLDEN VALLEY IN THE PAST 24 HOURS VIA FACEBOOK.
Apr 8, 7:30 AM PDTSNOW 21 Wsw Holbrook Junction, NVPUBLIC REPORTED 2 INCHES OF NEW SNOWFALL NEAR HOLBROOK JUNCTION IN THE PAST 24 HOURS VIA FACEBOOK.
Apr 8, 7:32 AM PDTSNOW 1Verdi, NVPUBLIC REPORTED 1 INCH OF NEW SNOWFALL NEAR VERDI IN THE PAST 24 HOURS VIA FACEBOOK.
Apr 8, 7:32 AM PDTSNOW 45 Sw South Lake Tahoe, CATRAINED WEATHER SPOTTER NEAR SOUTH LAKE TAHOE REPORTED 4 INCHES OF NEW SNOW SINCE YESTERDAY MORNING AT AN ELEVATION OF 6318 FEET.
Apr 8, 7:34 AM PDTSNOW 10Devils Gate Summit, CAPUBLIC REPORTED 10 INCHES OF SNOWFALL IN THE PAST 48 HOURS NEAR DEVILS GATE VIA FACEBOOK. ELEVATION 7484 FEET.
Apr 8, 8:00 AM PDTSNOW 25 W Reno, NVCOCORAHS OBSERVER REPORTED 2 INCHES OF SNOWFALL WITH A SNOW WATER EQUIVALENT OF 0.32 INCHES. TOTAL PRECIPIATION OF 0.81 INCHES IN THE PAST 24 HOURS. ELEVATION 5195 FEET.
Apr 8, 8:00 AM PDTHEAVY SNOW 162 W Mammoth Lakes, CAMAMMOTH MOUNTAIN SKI AREA REPORTED 16 INCHES OF NEW SNOW IN THE PAST 24 HOURS. 48 HOUR TOTAL SNOWFALL OF 36 INCHES.
Apr 8, 8:01 AM PDTHEAVY SNOW 181 Sw June Lake, CAJUNE MOUNTAIN SKI AREA REPORTED 18 INCHES OF NEW SNOWFALL IN THE PAST 24 HOURS. 48 HOUR TOTAL SNOWFALL OF 30 INCHES.
Apr 8, 8:02 AM PDTSNOW 61 E Incline Village, NVDIAMOND PEAK SKI RESORT REPORTED 6 INCHES OF NEW SNOWFALL IN THE PAST 24 HOURS. 48 HOUR TOTAL SNOWFALL OF 10 INCHES.
Apr 8, 8:03 AM PDTHEAVY SNOW 18Heavenly Valley, NVHEAVENLY SKI RESORT REPORTED 18 INCHES OF SNOWFALL IN THE PAST 24 HOURS. 48 HOUR TOTAL SNOWFALL OF 21 INCHES.
Apr 8, 8:04 AM PDTHEAVY SNOW 141 W Homewood, CAHOMEWOOD MOUNTAIN RESORT REPORTED 14 INCHES OF NEW SNOWFALL IN THE PAST 24 HOURS AT THE UPPER MOUNTAIN. 48 HOUR TOTAL SNOWFALL OF 23 INCHES.
Apr 8, 8:05 AM PDTHEAVY SNOW 13Squaw Valley, CASQUAW VALLEY SKI RESORT REPORTED 13 INCHES OF SNOWFALL IN THE PAST 24 HOURS AT THE UPPER MOUNTAIN. 48 HOUR TOTAL SNOWFALL OF 25 INCHES.
Apr 8, 8:06 AM PDTHEAVY SNOW 151 W Alpine Meadows, CAALPINE MEADOWS SKI RESORT REPORTED 15 INCHES OF SNOWFALL IN THE PAST 24 HOURS. 48 HOUR TOTAL SNOWFALL OF 27 INCHES.
Apr 8, 8:07 AM PDTHEAVY SNOW 13Northstar, CANORTHSTAR SKI RESORT REPORTED 13 INCHES OF SNOWFALL IN THE PAST 24 HOURS. 48 HOUR TOTAL SNOWFALL OF 26 INCHES.
Apr 8, 8:08 AM PDTHEAVY SNOW 161 S Donner Summit, CASUGAR BOWL SKI RESORT REPORTED 16 INCHES OF SNOWFALL IN THE PAST 24 HOURS. 48 HOUR TOTAL SNOWFALL OF 20 INCHES.
Apr 8, 8:09 AM PDTHEAVY SNOW 15Mount Rose Ski Area, NVMOUNT ROSE SKI AREA REPORTED 15 INCHES OF SNOWFALL IN THE PAST 24 HOURS. 48 HOUR TOTAL SNOWFALL OF 31 INCHES.
Apr 8, 8:30 AM PDTSNOW 0.1Spanish Springs, NVNWS EMPLOYEE REPORTED 0.1 INCHES OF OVERNIGHT SNOWFALL AT AN ELEVATION OF 4650 FEET.
Apr 8, 8:30 AM PDTSNOW 1Cold Springs Valley, NVPUBLIC REPORTED 1 INCH OF NEW SNOWFALL NEAR COLD SPRINGS VALLEY IN THE PAST 24 HOURS VIA FACEBOOK.
Apr 8, 8:30 AM PDTHEAVY SNOW 15Lake Davis, CAPUBLIC REPORTED 15 INCHES OF SNOWFALL OVERNIGHT NEAR LAKE DAVIS VIA FACEBOOK.
Apr 8, 8:32 AM PDTSNOW 61 Ene Truckee, CAPUBLIC REPORTED 6 INCHES OF NEW SNOWFALL NEAR TRUCKEE IN THE PAST 24 HOURS VIA FACEBOOK. ELEVATION 5900 FEET.
Apr 8, 8:34 AM PDTSNOW 14 Nnw Reno, NVPUBLIC REPORTED 1 INCH OF NEW SNOWFALL NORTH-NORTHWEST OF RENO IN THE PAST 24 HOURS VIA FACEBOOK.
Apr 8, 8:40 AM PDTHEAVY SNOW 14Kingsbury, NVPUBLIC REPORTED 14 INCHES OF SNOWFALL NEAR KINGSBURY IN THE PAST 24 HOURS VIA FACEBOOK. ELEVATION 7200 FEET.
Apr 8, 9:00 AM PDTSNOW 75 W Beckwourth, CA7 INCHES AS OF 9AM. 24 HOUR TOTAL. ELEVATION 4850 FEET.
Apr 8, 9:20 AM PDTSNOW 3Kings Beach, CAPUBLIC REPORTED 3 INCHES OF SNOWFALL AT LAKE LEVEL NEAR KINGS BEACH IN THE PAST 24 HOURS VIA FACEBOOK. ELEVATION 6240 FEET.
Apr 8, 9:30 AM PDTSNOW 65 E Alpine Meadows, CAA TRAINED WEATHER SPOTTER REPORTED 6 INCHES OF NEW SNOW SINCE YESTERDAY MORNING AT AN ELEVATION OF 6350 FEET.
Apr 8, 10:21 AM PDTSNOW 21 N Cold Springs Valley, NVTRAINED SPOTTER REPORTED 2 INCHES OF SNOWFALL IN THE PAST 24 HOURS WITH 1 INCH OF TOTAL PRECIPITATION.
Apr 8, 12:46 PM PDTSNOW 02 Wnw Diamond Springs, CAWET SNOW NOW FALLING, 1 MILE SOUTH OF PLACERVILLE, ELEVATION 2180 FEET. CURRENTLY NO ACCUMULATION.
Apr 8, 1:20 PM PDTSNOW 12 W Pollock Pines, CAAN INCH OF SNOW HAS FALLEN OVER THE PAST HOUR IN POLLOCK PINES, ELEVATION 3700 FEET.
Apr 8, 2:00 PM PDTSNOW 1.82 Wnw Eagle Lake, CATRAINED WEATHER SPOTTER REPORTED 1.75 INCHES OF NEW SNOWFALL IN THE PAST 24 HOURS WITH A 0.5 INCH LIQUID WATER EQUIVALENT.

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, 6.2 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 2017-04-06Temperature 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 2017-04-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 square meters per square second.1939587897Sfc1 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
2186 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
314 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

344 
WWUS45 KREV 061811
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
1111 AM PDT Thu Apr 6 2017

CAZ071-071200-
/O.UPG.KREV.WS.A.0005.170407T0700Z-170409T0000Z/
/O.NEW.KREV.WS.W.0011.170407T0700Z-170409T0000Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
1111 AM PDT Thu Apr 6 2017

...WINTER STORM WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 5 PM
PDT SATURDAY...

The National Weather Service in Reno has issued a Winter Storm
Warning for heavy snow, which is in effect from midnight tonight 
to 5 PM PDT Saturday. The Winter Storm Watch is no longer in 
effect.

* Timing: Heavy wet snow will develop overnight Thursday night in
  the Sierra. Snow will spread to lower elevations such as Portola
  by Friday night through Saturday. Snow should taper to showers
  on Saturday. 

* Snow Levels: Snow levels starting 5500-6500 feet Friday, falling
  to 4000-5000 feet by Saturday morning. Snow levels may fluctuate
  around pass level on Friday.  

* Snow Accumulations: 1 to 2 feet above 5500 feet elevation with
  Several inches of accumulation possible below 5500 feet.

* Winds: Strong southwest winds areawide, with gusts Thursday 
  night through Saturday morning ranging from 40-60 mph along 
  Highway 395, to over 75 mph along the mountain peaks and 
  ridges.

* Impacts: Higher elevation roads such as around Bogard Rest Area,
  Yuba and Fredonyer passes will see significant disruptions due
  to heavy snowfall. Sections of Highway 70 and 395 could also see
  lighter snow impacts. Heavy wet snow and strong winds could lead
  to downed trees and power outages. 


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.

&&

$$

CAZ072-NVZ002-071200-
/O.UPG.KREV.WS.A.0005.170407T0700Z-170409T0000Z/
/O.NEW.KREV.WS.W.0011.170407T0700Z-170409T0000Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, 
and Incline Village
1111 AM PDT Thu Apr 6 2017

...WINTER STORM WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 5 PM
PDT SATURDAY...

The National Weather Service in Reno has issued a Winter Storm
Warning for heavy snow, which is in effect from midnight tonight 
to 5 PM PDT Saturday. The Winter Storm Watch is no longer in 
effect.


* Timing: Heavy wet snow will develop Thursday night in the
  Sierra. Snow will spread to lake level by Friday night through
  Saturday. Snow should taper to showers on Saturday. 

* Snow Levels: Snow levels starting 6500-7500 feet Friday, falling
  to 4500 feet by Saturday morning. Snow levels may fluctuate
  around Lake Tahoe level during the day on Friday. 

* Snow Accumulations: 2 to 4 feet of snow above 7500 feet
  elevation. 6 to 12 inches around Lake Tahoe level, including 
  Truckee and South Lake Tahoe with the potential for up to 18 
  inches if snow levels drop sooner than currently expected.

* Winds: Strong southwest winds areawide, with gusts Thursday
  night through Saturday morning ranging from 45-55 mph along I-80
  and near Lake Tahoe, and up to 150 mph along the higher 
  mountain peaks and ridges.

* Impacts: Significant travel disruptions Friday at pass
  elevations including Donner, Echo, Spooner, and Mount Rose
  summits. Travel disruptions affecting mountain communities
  Friday night into Saturday including around Lake Tahoe. Heavy
  wet snow and strong winds could lead to downed trees and power
  outages.


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.

&&

$$

CAZ073-071200-
/O.UPG.KREV.WS.A.0005.170407T0700Z-170409T0000Z/
/O.NEW.KREV.WS.W.0011.170407T0700Z-170409T0000Z/
Mono County-
Including the cities of Bridgeport and Mammoth Lakes
1111 AM PDT Thu Apr 6 2017

...WINTER STORM WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 5 PM
PDT SATURDAY...

The National Weather Service in Reno has issued a Winter Storm
Warning for heavy snow, which is in effect from midnight tonight 
to 5 PM PDT Saturday. The Winter Storm Watch is no longer in 
effect.


* Timing: Heavy wet snow will develop before daybreak Friday in
  the Sierra and areas west of Highway 395, including Mammoth
  Lakes. Snow will spread to communities along Highway 395 by
  Friday night through Saturday. Snow should taper to showers on 
  Saturday. 

* Snow Levels: Snow levels starting 7000-8500 feet Friday, falling
  to all valley floors by Saturday morning. Snow levels may
  fluctuate around 7500 feet on Friday.

* Snow Accumulations: Potential for 2 to 4 feet of heavy wet 
  snow along the Sierra Crest and Mammoth Mountain, generally 
  above 8500 feet. 10 to 20 inches in Mammoth Lakes and passes 
  on Highway 395. 2 to 5 inches for Lee Vining and Bridgeport, 
  with more possible if snow levels fall faster than expected.

* Winds: Strong southwest winds areawide, with gusts Thursday
  night through Saturday morning ranging from 45-60 mph along
  Highway 395, and up to 150 mph along the higher mountain peaks 
  and ridges.

* Impacts: Significant travel disruptions Friday around Mammoth
  Lakes and at pass elevations along Highway 395 including Conway,
  Deadman, and Devils Gate summits. Travel disruptions becoming
  more widespread in Mono County Friday night into Saturday. Heavy
  wet snow and strong winds could lead to downed trees and power
  outages.


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.

&&

$$

http://weather.gov/reno
4 follow-up statements
997 
WWUS45 KREV 071017
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
317 AM PDT Fri Apr 7 2017

CAZ071-072300-
/O.CON.KREV.WS.W.0011.000000T0000Z-170409T0000Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
317 AM PDT Fri Apr 7 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT
SATURDAY...

* Timing: Heavy wet snow will continue through Saturday, spreading
  to lower elevations such as Portola by tonight. Snow should
  taper to showers on Saturday. 

* Snow Levels: Snow levels starting 5500-6500 feet today, falling
  to 4000-5000 feet by Saturday morning. Snow levels may fluctuate
  around pass level today. 

* Snow Accumulations: 1 to 2 feet above 5500 feet elevation with
  several inches of accumulation possible below 5500 feet. 

* Winds: Strong southwest winds areawide, with gusts through
  Saturday morning ranging from 40-60 mph along Highway 395, to
  over 75 mph along the mountain peaks and ridges.

* Impacts: Higher elevation roads such as around Bogard Rest
  Area, Yuba and Fredonyer passes will see significant 
  disruptions due to heavy snowfall. Sections of Highway 70 
  and 395 could also see lighter snow impacts. Heavy wet snow 
  and strong winds could lead to downed trees and power 
  outages. 

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.

&&

$$

CAZ072-NVZ002-072300-
/O.CON.KREV.WS.W.0011.000000T0000Z-170409T0000Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, 
and Incline Village
317 AM PDT Fri Apr 7 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT
SATURDAY...

* Timing: Heavy wet snow will spread to lake level by tonight
  through Saturday. Snow should taper to showers on Saturday. 

* Snow Levels: Snow levels starting 6500-7000 feet today, falling
  to 4500 feet by Saturday morning. Snow levels may fluctuate
  around Lake Tahoe level during the day today. 

* Snow Accumulations: 2 to 4 feet of snow above 7500 feet 
  elevation. 6 to 12 inches around Lake Tahoe level, including 
  Truckee and South Lake Tahoe with the potential for up to 18 
  inches if snow levels drop sooner than currently expected.

* Winds: Strong southwest winds areawide, with gusts Thursday
  night through Saturday morning ranging from 45-55 mph along I-80
  and near Lake Tahoe, and up to 135 mph along the higher mountain
  peaks and ridges.

* Impacts: Significant travel disruptions today at pass elevations
  including Donner, Echo, Spooner, and Mount Rose summits. Travel
  disruptions affecting mountain communities through Saturday
  including around Lake Tahoe. Heavy wet snow and strong winds
  could lead to downed trees and power outages.

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.

&&

$$

CAZ073-072300-
/O.CON.KREV.WS.W.0011.000000T0000Z-170409T0000Z/
Mono County-
Including the cities of Bridgeport and Mammoth Lakes
317 AM PDT Fri Apr 7 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT
SATURDAY...

* Timing: Heavy wet snow will continue in the Sierra and areas
  west of Highway 395, including Mammoth Lakes. Snow will spread
  to communities along Highway 395 today and Saturday. Snow should
  taper to showers on Saturday. 

* Snow Levels: Snow levels starting near 7000 feet today, falling
  to all valley floors by Saturday morning. Snow levels may
  fluctuate around 7500 feet on Friday. 

* Snow Accumulations: Potential for 2 to 4 feet of heavy wet 
  snow along the Sierra Crest and Mammoth Mountain, generally 
  above 8500 feet. 10 to 20 inches in Mammoth Lakes and passes 
  on Highway 395. 2 to 5 inches for Lee Vining and Bridgeport, 
  with more possible if snow levels fall faster than expected.

* Winds: Strong southwest winds areawide, with gusts Thursday
  night through Saturday morning ranging from 45-60 mph along
  Highway 395, and up to 125 mph along the higher mountain peaks
  and ridges.

* Impacts: Significant travel disruptions today around Mammoth
  Lakes and at pass elevations along Highway 395 including Conway,
  Deadman, and Devils Gate summits. Travel disruptions becoming
  more widespread in Mono County Friday night into Saturday. Heavy
  wet snow and strong winds could lead to downed trees and power
  outages. 

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.

&&

$$

http://weather.gov/reno
884 
WWUS45 KREV 072119
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
219 PM PDT Fri Apr 7 2017

CAZ071-081200-
/O.CON.KREV.WS.W.0011.000000T0000Z-170409T0000Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
219 PM PDT Fri Apr 7 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT
SATURDAY...

* Timing: Snow will continue through Saturday, spreading to lower
  elevations such as Portola tonight. Snow should taper to 
  showers on Saturday. 

* Snow Levels: Snow levels starting 5500-6500 feet today, 
  falling to 4000-5000 feet by Saturday morning. Snow levels 
  may fluctuate around pass level today. 

* Additional Snow Accumulations: 7 to 14 inches above 5500 feet
  elevation with 2-6 inches of accumulation possible below 5500
  feet with locally higher amounts to 10 inches along Highway 89.

* Winds: Southwest 15 to 25 mph with gusts to 40 mph. Local gusts
  to 75 mph over passes and ridges tonight.

* Impacts: Higher elevation roads such as around Bogard Rest 
  Area, Yuba and Fredonyer passes will see significant 
  disruptions due to heavy snowfall. Sections of Highway 70 
  and 395 could also see lighter snow impacts. Heavy wet snow 
  and strong winds could lead to downed trees and power 
  outages. 

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.

&&

$$

CAZ072-NVZ002-081200-
/O.CON.KREV.WS.W.0011.000000T0000Z-170409T0000Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, 
and Incline Village
219 PM PDT Fri Apr 7 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT
SATURDAY...

* Timing: Snow will spread to lake level tonight through 
  Saturday. Snow should taper to showers on Saturday. 

* Snow Levels: Snow levels near lake level early this evening
  falling to 5500 feet by midnight. 

* Additional Snow Accumulations: 1 to 2 feet of snow above 7000
  feet elevation. 6 to 12 inches around Lake Tahoe level,
  including Truckee and South Lake Tahoe with locally higher
  amounts along highway 89.

* Winds: Gusty southwest winds areawide, with gusts through Saturday
  morning ranging from 35-45 mph along I-80 and near Lake Tahoe, 
  and up to 125 mph along the higher mountain peaks and ridges. 

* Impacts: Significant travel disruptions today at pass
  elevations including Donner, Echo, Spooner, and Mount Rose 
  summits. Travel disruptions affecting mountain communities 
  through Saturday including around Lake Tahoe. Heavy wet snow 
  and strong winds could lead to downed trees and power 
  outages. 

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.

&&

$$

CAZ073-081200-
/O.CON.KREV.WS.W.0011.000000T0000Z-170409T0000Z/
Mono County-
Including the cities of Bridgeport and Mammoth Lakes
219 PM PDT Fri Apr 7 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT
SATURDAY...

* Timing: Snow will continue in the Sierra and areas west
  of Highway 395, including Mammoth Lakes. Snow will be more
  intermittent in communities along Highway 395 into Saturday. The
  snow will taper to showers on Saturday.

* Snow Levels: Snow levels starting near 7000 feet early this
  evening, falling to all valley floors by Saturday morning.

* Additional Snow Accumulations: Up to 3 feet of snow along the
  Sierra Crest and Mammoth Mountain, generally above 8500 feet. 10
  to 15 inches in Mammoth Lakes and passes on Highway 395. 3 to 6 inches
  for Lee Vining and Bridgeport.

* Winds: Gusty southwest winds areawide, with gusts through
  Saturday morning ranging from 35-50 mph along Highway 395, and 
  up to 125 mph along the higher mountain peaks and ridges.

* Impacts: Significant travel disruptions today around Mammoth 
  Lakes and at pass elevations along Highway 395 including 
  Conway, Deadman, and Devils Gate summits. Travel disruptions 
  becoming more widespread in Mono County Friday night into 
  Saturday. Heavy wet snow and strong winds could lead to 
  downed trees and power outages.

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.

&&

$$

http://weather.gov/reno
906 
WWUS45 KREV 080936
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
236 AM PDT Sat Apr 8 2017

CAZ071-090000-
/O.CON.KREV.WS.W.0011.000000T0000Z-170409T0000Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
236 AM PDT Sat Apr 8 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS
AFTERNOON...

* Timing: Snow will continue through this morning. Snow should 
  taper to showers this afternoon. 

* Snow Levels: Falling to 4000-5000 feet by this morning.

* Additional Snow Accumulations: 2 to 4 inches west of 
  Highway 395...with up to 2 inches east of Highway 395. Localized
  higher amounts up to 6 inches along Highway 89.

* Winds: Southwest 15 to 25 mph with gusts to 40 mph. Local 
  gusts to 70 mph over passes and ridges tonight. 

* Impacts: Higher elevation roads such as around Bogard Rest 
  Area, Yuba and Fredonyer passes will see significant 
  disruptions due to heavy snowfall. Sections of Highway 70 
  and 395 could also see lighter snow impacts. Heavy wet snow 
  and strong winds could lead to downed trees and power 
  outages. 

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.

&&

$$

CAZ072-NVZ002-090000-
/O.CON.KREV.WS.W.0011.000000T0000Z-170409T0000Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, 
and Incline Village
236 AM PDT Sat Apr 8 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS
AFTERNOON...

* Timing: Snow will continue through this morning. Snow should 
  taper to showers this afternoon. 

* Snow Levels: Falling to 5500 feet this morning.

* Additional Snow Accumulations: 6 to 18 inches above 7000 feet. 
  3 to 6 inches around Lake Tahoe level, including Truckee and 
  South Lake Tahoe with localized higher amounts along highway 89.

* Winds: Gusty southwest winds areawide, with gusts through
  Saturday morning ranging from 30-40 mph along I-80 and near Lake
  Tahoe, and up to 90 mph along the higher mountain peaks and 
  ridges.

* Impacts: Significant travel disruptions today at pass 
  elevations including Donner, Echo, Spooner, and Mount Rose 
  summits. Travel disruptions affecting mountain communities 
  through today including around Lake Tahoe. Heavy wet snow 
  and strong winds could lead to downed trees and power 
  outages. 

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.

&&

$$

CAZ073-090000-
/O.CON.KREV.WS.W.0011.000000T0000Z-170409T0000Z/
Mono County-
Including the cities of Bridgeport and Mammoth Lakes
236 AM PDT Sat Apr 8 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS
AFTERNOON...

* Timing: Snow will continue in the Sierra and areas west of 
  Highway 395, including Mammoth Lakes. Snow will be more 
  intermittent in communities along Highway 395 today. The 
  snow will taper to showers this afternoon. 

* Snow Levels: Falling to all valley floors by Saturday morning.

* Additional Snow Accumulations: 8 to 15 inches of snow along the 
  Sierra Crest and Mammoth Mountain, generally above 8500 
  feet. 4 to 8 inches in Mammoth Lakes and passes on Highway 
  395. Up to 3 inches for Lee Vining and Bridgeport. 

* Winds: Gusty southwest winds areawide, with gusts through
  Saturday morning ranging from 35-45 mph along Highway 395, and 
  up to 125 mph along the higher mountain peaks and ridges.

* Impacts: Significant travel disruptions today around Mammoth 
  Lakes and at pass elevations along Highway 395 including 
  Conway, Deadman, and Devils Gate summits. Travel disruptions 
  becoming more widespread in Mono County this morning. Heavy 
  wet snow and strong winds could lead to downed trees and power 
  outages.

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.

&&

$$

http://weather.gov/reno
785 
WWUS45 KREV 082148
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
248 PM PDT Sat Apr 8 2017

CAZ071>073-NVZ002-082300-
/O.CAN.KREV.WS.W.0011.000000T0000Z-170409T0000Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Greater Lake Tahoe Area-Mono County-
248 PM PDT Sat Apr 8 2017

...WINTER STORM WARNING IS CANCELLED...

The National Weather Service in Reno has cancelled the Winter
Storm Warning. 

Snow showers will continue into this evening, but the threat for
widespread snow has ended. Local accumulations up to 2 inches will
be possible in heavy showers into this evening.

$$

http://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 6, 11:11 AM PDT, 0 minutes earlier.

Area forecast discussion, Apr 6, 11:11 AM PDT, 0 minutes before
Area Forecast Discussion...RESENT
National Weather Service Reno NV
1111 AM PDT Thu Apr 6 2017

.UPDATE...
Winds have already increased and are blowing quite strong across
the Sierra and immediate lee. Gusts to 115 mph have occurred on a
few Tahoe area ridges with gusts 50 to 55 mph in the Tahoe Basin,
Mono and Lassen Counties as well as the Sierra Front. Winds will
continue at similar speeds through this afternoon and the high and
advisories look good. The adjustments were to increase the ridge
winds and some valley locations to better match observations.

We are also upgrading the Winter Storm Watch to a Warning. Still
expect several feet of snow up high with mainly impacting the
Sierra passes through tomorrow morning. Snow levels do lower
tomorrow afternoon into Friday night with accumulating snow down
to 5000-5500 feet in Lassen County, lake level in Tahoe and
6500-7000 feet in Mono. The winds will also be gusty in those
areas as well with gusts 50 to 55 mph at times in the lower
elevations. Ridge gusts may reach 150 mph tonight. Wallmann/-Zach

&&

.PREVIOUS DISCUSSION... /Issued 251 AM PDT Thu Apr 6 2017/

SYNOPSIS...

Winds will increase today and continue into Saturday morning ahead
of an incoming atmospheric river storm. The strongest winds are
expected this afternoon and again Friday afternoon. Multiple
rounds of heavy rain and higher elevation snow will occur tonight
through Friday night with snow and snow pellet showers bringing
additional accumulations Saturday even down to western Nevada
valley floors. A drier pattern is likely for early next week with
another moderate storm possible for the end of next week.

SHORT TERM...Today through Saturday Night...

The well advertised Atmospheric River (AR) storm is on track to
reach the region tonight, with a myriad of significant impacts
possible through Saturday. This includes heavy rain and mountain
snow, major travel impacts, possible flooding, and strong winds. The
AR would be categorized as a solid moderate event, with an uptick
in ensembles bordering on strong. This is a highly unusual event
for April with the forecast liquid precipitation 2-day totals in
some locations having not been observed in 10-20 years.
Confidence is high for heavy precipitation late Thursday night
through Saturday, but lower for snow levels and subsequently snow
totals and flood potential. That being said, however, the trend
for snow levels has at least been in a downward direction.

Here are the highlights with regards to this storm:

PRECIPITATION: Warm air advection today ahead of the main storm will
bring isolated areas of light rain and mountain top snow, with the
main AR moisture push starting tonight into Friday. The period for
peak precipitation rates still looks to be on Friday, followed by a
secondary wave Friday night. The first piece should lead to the
highest precipitation rates in the northern and central Sierra,
while the second piece has more of a focus in the central and
southern Sierra. The final piece on Saturday, when the upper low
shifts through the region, has trended stronger due to the core of
the low making it farther south. The atmosphere will be highly
unstable due to the cold pool aloft with showery precipitation
bringing a mix of snow and snow pellet showers down to all valley
floors. Overall, liquid precipitation totals haven't changed much
with 2-5 inches along the Sierra crest and 1-3 inches in the Tahoe
Basin, eastern Sierra foothills, and northeast California. 0.5-1.5
inches is possible along the Sierra Front with lesser amounts
into west central Nevada. There is a chance for an isolated strike
or two of lightning throughout the event, but will leave mention
out of the forecast for now as confidence remains lower.

SNOW LEVELS: This will be the key to the forecast and is also still
where the greatest uncertainty lies. Snow levels look to start
around 6000-6500 feet near the Oregon border, 7000-7500 foot range
around the Tahoe region, and 7500-8000 feet in Mono Co. There is
still the question of some warming Friday afternoon, however the
overall trend has been to limit the warming potential as flow
remains more southwesterly. The deviations among available
guidance has also declined, but is still in the 500-1000 foot
range, which would still yield appreciable differences in the
forecast. The biggest potential variation in snow totals will be
in the 6000-7500 foot range (7000-8000 foot range in Mono Co)
where there is less certainty in the heavier rounds of
precipitation falling as rain or snow. A cold front will shift
through the region Friday night, which will take snow levels down
to 4000-5000 feet by Saturday.

HYDROLOGIC CONCERNS: Rises are certain on all mainstem rivers,
with several forecast to reach monitor stage. Currently, mainstem
river flooding is not expected outside of the Middle Fork of the
Feather River at Portola where minor flooding is expected. The
Humboldt River at Imlay remains in moderate flood stage, but it
has been here for a couple of weeks already due to snowmelt. The
river forecasts are highly dependent on snow levels, and if they
were to stay higher longer, flooding may become more of an issue.

The greatest concern remains for lower elevation creeks and
streams, especially those flowing out of the western Nevada
Sierra Front. The ground is already saturated from this record
winter and the lower elevation snowpack is ripe, and will lead to
significant runoff. Also be prepared for rises on all terminal
lakes, including but not limited to: Washoe, Honey, Silver, Swan,
and White Lakes. A flood watch remains in effect for the lower
elevations of the Sierra, northeast California, and the western
Nevada Sierra Front. Small debris flows or rock slides are also
possible due to the heavy rain, especially in the lower elevations
of the Sierra on Friday.

WINDS: 700 mb winds continue to increase today with gusts this
afternoon reaching 40-50 mph in valley locations and around 100 mph
across Sierra ridges. The jet stream moves across northern CA/NV
tonight into Friday with 700 mb winds increasing to 55-70 kts.
This may lead to a period where Sierra ridges experience gusts
nearing 150 mph. Cross-sections and model soundings would indicate
the best downslope enhancement potential to be tonight, ahead of
the main moisture plume, however, the south-southwest direction is
not as favorable as west-southwest would be. The better wind
direction coincides with the heavy precipitation, which tends to
dampen out wave activity. The period of strongest winds is likely
to be this afternoon into the night and then again Friday
afternoon between the two heavier rounds of precipitation. Post-
frontal breezy conditions will continue into Saturday.

If it were me...

Finish completing preparations for this storm by this afternoon
including any flood mitigation measures--areas that have seen
flooding this past winter may easily see them again. Plan for snow
issues in the mountains such as delays, possible road closures,
and chain controls. Avoid mountain travel tonight through Saturday
as travel is likely to become very slow and hazardous. There may
be a couple of short windows where the snow levels are high enough
for it to only be rain or slush on Donner and Echo Summits,
however, don't count on this as it remains in the critical snow
level uncertainty belt. Be ready for much colder temperatures this
weekend with the potential for light snow or pellet accumulations
even on western Nevada valley floors Saturday. If you have any
early season sensitive vegetation, it may be a good idea to cover
those plants or, if possible, take them indoors. This storm is
highly dynamic and the smaller details may change as the event
unfolds, so be sure to continue to monitor the forecast. -Dawn

LONG TERM...Sunday Morning through Next Week...

Shortwave ridging and subsequent increasing heights with a more
zonal flow pattern will keep the weather quiet into the middle of
the upcoming week. Temperatures along the ridges were cooled a
little to keep the warming trend tamped for higher elevations.
Models tend to warm higher elevations too rapidly during the
transition seasons when flow is more zonal; valley temperatures were
not modified significantly. Daytime highs will warm back into the
mid/upper 60s by mid week before the next spring system moves into
the region.

The next weather producer is shaping up to be another decent system
backed by a weaker-variety atmospheric moisture tap. Inland AR
indicators are favorable for a moisture push into the Sierra, but
wind trajectories are less favorable for a strong push into
western Nevada. Currently, models are pointing to a much more
modest amount of moisture than this weekend's system, but we will
be watching for significant shifts in moisture content. The way
this season has progressed has shown that initial estimates for
QPF have been biased lower than what has actually transpired.

Snow level projections are trending colder from previous runs, but
still show a period of rain for elevations up to 7500 ft.
Flooding potential remains uncertain due to questions in QPF and
snow level variations this far out. What can be said with
confidence: Another system will bring a period of higher elevation
snow and valley rain to the Sierra and western Nevada later next
week. Expect the potential for travel disruptions over Sierra
passes and keep flood mitigation efforts in place. Boyd

AVIATION...

Ridge winds around 50-85 kts will continue to increase ahead of a
significant late season storm. As ridge winds pick up this
morning, a period LLWS is possible for Sierra locations; expect
turbulent conditions along the Sierra Front from the surface on
up. Surface wind gusts increase to 30-40 kts late this morning
with gusty conditions continuing through Saturday PM. During
rain/snow, winds will likely dampen leading to an erratic gust
pattern and increased gust spread that may be a complication
during takeoff/landing and for unfixed winged aircraft.

700 mb winds increase to 60-70 kts with mountain wave/turbulence
likely with periods of LLWS possible especially for Sierra
locations. Very heavy rain and mountain snow will bring long periods
of reduced CIGs/VIS to Sierra terminals with heavy rain expected for
KRNO/KCXP Friday. Snow accumulations for Sierra terminals could
range from a few inches to a foot or more. By Saturday light snow
accumulations of snow/snow pellets will be possible for KRNO/KCXP.
-Zach/Boyd

&&

.REV Watches/Warnings/Advisories...
NV...Flood Watch from late tonight through Saturday morning
     NVZ002-003.

     Wind Advisory until 11 PM PDT Friday NVZ003-005.

     Lake Wind Advisory until midnight PDT tonight for Lake Tahoe in
     NVZ002.

     Winter Storm Warning from midnight tonight to 5 PM PDT Saturday
     NVZ002.

     High Wind Watch from Friday morning through Friday evening
     NVZ001-004.

     Lake Wind Advisory until 8 PM PDT this evening for Pyramid Lake
     in NVZ004.

CA...Flood Watch from late tonight through Saturday morning
     CAZ071>073.

     Winter Storm Warning from midnight tonight to 5 PM PDT Saturday
     CAZ071.

     Wind Advisory until 11 PM PDT Friday CAZ070.

     Winter Storm Warning from midnight tonight to 5 PM PDT Saturday
     CAZ073.

     Lake Wind Advisory until midnight PDT tonight for Lake Tahoe in
     CAZ072.

     Winter Storm Warning from midnight tonight to 5 PM PDT Saturday
     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 6, 3:17 PM PDTHigh Wind WarningREVChurchill, Lyon, Mineral, Pershing, Washoe29 hr

Nearby

Winter Storm Warnings in California, 2017Winter Storm Warnings in Nevada, 2017Every winter storm warning in 2017

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.