Alert archive / California / Winter Storm Warnings in 2013

Winter Storm Warning 1, NWS Las Vegas, NV

February 19, 2013San Bernardino County, California

NWS Las Vegas, NV issued this winter storm warning at Feb 19, 2013, 11:59 AM PST for San Bernardino County, California. It took effect at Feb 19, 2013, 10:00 PM PST. It was in force for 12 hr. 10 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Feb 19, 2013, 11:59 AM PST (19:59 UTC)
In effect from
Feb 19, 2013, 10:00 PM PST
Expired
Feb 20, 2013, 10:00 AM PST
In force
12 hr
Issued by
NWS Las Vegas, NV

County San Bernardino County, CA

What was reported inside it

TimeReportWhereRemark
Feb 20, 1:00 AM PSTSNOW 2Hesperia, CASNOW ACCUMULATION FROM 930 PM TUE THROUGH 1 AM WED.
Feb 20, 6:30 AM PSTSNOW 2.5Morongo Valley, CASNOWFALL BEGAN SOMETIME AFTER MIDNIGHT AND ENDED AT 6 AM THIS MORNING.
Feb 20, 6:55 AM PSTSNOW 4Crestline, CA24 HOUR SNOWFALL ENDING AT 7 AM WED MORNING.
Feb 20, 7:00 AM PSTSNOW 3Lucerne Valley, CA
Feb 20, 7:00 AM PSTSNOW 11Big Bear City, CAPAST 12 HOURS
Feb 20, 7:00 AM PSTSNOW 1Mountain Pass, CASNOW FELL BETWEEN 4 AM AND 7 AM THIS MORNING.
Feb 20, 8:15 AM PSTSNOW 0.34 Ne Barstow, CAA QUARTER OF AN INCH OF SNOW FELL BETWEEN 7 AND 8 AM.
Feb 20, 9:00 AM PSTSNOW 3Apple Valley, CA
Feb 20, 9:00 AM PSTSNOW 12Running Springs, CAPAST 14 HOURS
Feb 20, 9:45 AM PSTSNOW 11 Ssw Barstow, CASNOW BEGAN AT ABOUT 545 AM AND ENDED AT ABOUT 945 AM.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Las Vegas, NV (KVEF), launched 12:00Z, 8.0 hours before the alert went out and 180 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, Las Vegas, NV at 12:00Z on 2013-02-19Temperature 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 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Las Vegas, NV at 12:00Z on 2013-02-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 square meters per square second.193958Sfc1 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
2725 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
56 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

362 
WWUS45 KVEF 191959
WSWVEF

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
1159 AM PST TUE FEB 19 2013

.A COLD PACIFIC STORM WILL MOVE ACROSS THE AREA LATE TODAY
THROUGH WEDNESDAY. PERIODS OF MODERATE TO HEAVY SNOW CAN BE
EXPECTED IN THE SIERRA BEGINNING LATE TODAY. LOCALLY HEAVY SNOW
IS THEN EXPECTED TONIGHT INTO WEDNESDAY ABOVE 3500 FEET OVER
PORTIONS OF SOUTHERN NEVADA AND NORTHWEST ARIZONA AND EVEN IN
EASTERN SAN BERNARDINO COUNTY. HEAVY SNOW IS EXPECTED IN THE
MORONGO BASIN AREA LATE THIS EVENING THROUGH EARLY WEDNESDAY
MORNING. SNOW MAY LINGER INTO EARLY WEDNESDAY EVENING ACROSS
MOHAVE COUNTY.

CAZ525-200400-
/O.NEW.KVEF.WS.W.0001.130220T0600Z-130220T1800Z/
MORONGO BASIN-
INCLUDING THE CITIES OF...MORONGO VALLEY...YUCCA VALLEY
1159 AM PST TUE FEB 19 2013

...WINTER STORM WARNING IN EFFECT FROM 10 PM THIS EVENING TO
10 AM PST WEDNESDAY ABOVE 2000 FEET...

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A WINTER
STORM WARNING ABOVE 2000 FEET FOR HEAVY SNOW...WHICH IS IN EFFECT
FROM 10 PM THIS EVENING TO 10 AM PST WEDNESDAY FOR ELEVATIONS
ABOVE 2000 FEET IN THE MORONGO BASIN.

* TIMING: LATE THIS EVENING THROUGH EARLY WEDNESDAY MORNING.

* SNOW LEVEL: 4500 FEET AT 10 PM TONIGHT LOWERING TO 2000 FEET
  WEDNESDAY MORNING.

* TOTAL SNOW ACCUMULATIONS: 2 TO 4 INCHES ABOVE 2000 FEET WITH
  LOCAL AMOUNTS UP TO 6 INCHES POSSIBLE.

* WINDS: SOUTHWEST 15 TO 25 MPH THEN BECOMING LIGHT AND VARIABLE
  AFTER MIDNIGHT.

* IMPACTS: DIFFICULT DRIVING CONDITIONS WITH REDUCED VISIBILITY
  AND SLICK ROADS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  ONLY TRAVEL IN AN EMERGENCY
SINCE SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE
TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA
FLASHLIGHT...FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN
EMERGENCY.
&&

$$

CAZ519-200400-
/O.CON.KVEF.WW.Y.0003.000000T0000Z-130220T1200Z/
EASTERN SIERRA SLOPES-
INCLUDING THE CITIES OF...ASPENDELL...WHITNEY PORTAL
1159 AM PST TUE FEB 19 2013

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST
WEDNESDAY...

A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST
WEDNESDAY FOR THE EASTERN SIERRA SLOPES. 

* TIMING: LATE TODAY THROUGH TONIGHT.

* TOTAL SNOW ACCUMULATIONS: 6 TO 10 INCHES ABOVE 8000 FEET WITH 
  3 TO 6 INCHES BELOW 8000 FEET.

* WINDS: SOUTHWEST TO WEST 25 TO 35 MPH WITH GUSTS TO 45 MPH 
  BECOMING NORTHWEST 10 TO 20 MPH WITH GUSTS TO 30 MPH LATE 
  EVENING.

* IMPACTS: DIFFICULT DRIVING CONDITIONS AND POSSIBLE ROAD 
  CLOSURES ABOVE 8000 FEET. NEAR WHITEOUT CONDITIONS AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT
VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND
BLOWING SNOW. USE CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN
AREAS.

&&

$$

NVZ014-200400-
/O.CON.KVEF.WW.Y.0003.130220T0000Z-130221T0000Z/
ESMERALDA AND CENTRAL NYE COUNTY-
INCLUDING THE CITIES OF...BEATTY...GOLDFIELD...SILVER PEAK...DYER
1159 AM PST TUE FEB 19 2013

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS
AFTERNOON TO 4 PM PST WEDNESDAY...

A WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS
AFTERNOON TO 4 PM PST WEDNESDAY FOR ESMERALDA AND CENTRAL NYE
COUNTIES.

* TIMING: SOME LIGHT SNOW IS POSSIBLE THIS AFTERNOON BUT THE 
  HEAVIEST SNOW IS EXPECTED BETWEEN 4 PM TODAY AND 4 AM 
  WEDNESDAY. ALTHOUGH SNOWFALL WILL PROBABLY BE LIGHTER DURING 
  THE DAY WEDNESDAY...STRONG NORTH WINDS WILL CAUSE AREAS OF 
  BLOWING SNOW. 

* TOTAL SNOW ACCUMULATIONS: MAINLY 3 TO 5 INCHES BUT UP TO 8 
  INCHES ABOVE 7000 FEET.

* WINDS: MAINLY SOUTH 10 TO 20 MPH WITH GUSTS TO 30 MPH EARLY 
  EVENING. NORTHWEST WINDS 20 TO 30 WITH GUSTS TO 40 MPH WILL 
  SPREAD INTO THE AREA AFTER MIDNIGHT.

* IMPACTS: DIFFICULT DRIVING CONDITIONS AND POSSIBLE ROAD 
  CLOSURES. NEAR WHITEOUT CONDITIONS AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT
VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND
BLOWING SNOW. USE CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN
AREAS.

&&

$$

NVZ018-019-200400-
/O.CON.KVEF.WW.Y.0003.130220T0600Z-130220T1800Z/
SHEEP RANGE-SPRING MOUNTAINS-RED ROCK CANYON-
INCLUDING...THE TOWN OF MT CHARLESTON...RED ROCK
1159 AM PST TUE FEB 19 2013

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 PM THIS
EVENING TO 10 AM PST WEDNESDAY...

A WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 PM THIS
EVENING TO 10 AM PST WEDNESDAY FOR THE SPRING MOUNTAINS AND RED
ROCK CANYON.

* TIMING: SOME LIGHT SNOW IS POSSIBLE THIS EVENING BUT SNOWFALL 
  INTENSITY WILL INCREASE AFTER 10 PM WITH HEAVY SNOW AT TIMES 
  THROUGH 10 AM WEDNESDAY. SOME LIGHT SNOWFALL MAY LINGER AFTER 
  10 AM. 

* TOTAL SNOW ACCUMULATIONS: 5 TO 10 INCHES ABOVE 7000 FEET WITH 
  2 TO 5 INCHES BETWEEN 4000 AND 7000 FEET.

* WINDS: VARIABLE 5 TO 15 MPH.

* IMPACTS: PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL 
  DIFFICULTIES. KYLE CANYON ROAD...LEE CANYON ROAD AND DEER 
  CREEK ROAD WILL LIKELY BE IMPACTED. HIGHWAY 160 OVER 
  MOUNTAIN SPRINGS SUMMIT MAY ALSO BE IMPACTED AS WELL AS THE 
  UPPER PORTION OF THE RED ROCK LOOP.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

AZZ001-003-NVZ015-200400-
/O.CON.KVEF.WW.Y.0003.130220T0600Z-130221T0000Z/
NORTHWEST PLATEAU-NORTHWEST DESERTS-LINCOLN COUNTY-
INCLUDING THE CITIES OF...COLORADO CITY...
PIPE SPRING NATIONAL MONUMENT...TUWEEP...MT TRUMBULL...
VALENTINE...CALIENTE...PIOCHE...PANACA...HIKO...ALAMO...RACHEL
1159 AM PST TUE FEB 19 2013 /1259 PM MST TUE FEB 19 2013/

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 PM PST
/11 PM MST/ THIS EVENING TO 4 PM PST /5 PM MST/ WEDNESDAY ABOVE
3500 FEET...

A WINTER WEATHER ADVISORY ABOVE 3500 FEET REMAINS IN EFFECT FROM
10 PM PST /11 PM MST/ THIS EVENING TO 4 PM PST /5 PM MST/
WEDNESDAY FOR LINCOLN COUNTY AND THE NORTHWEST PLATEAU OF MOHAVE
COUNTY.

* TIMING: SOME LIGHT RAIN AND SNOW IS POSSIBLE THIS EVENING BUT 
  PERIODS OF HEAVY SNOW ARE POSSIBLE LATER TONIGHT THROUGH 
  WEDNESDAY MORNING. SNOWFALL WILL BEGIN TO TAPER OFF WEDNESDAY 
  AFTERNOON. 

* SNOW LEVEL: LOWERING TO NEAR 3500 FEET.

* TOTAL SNOW ACCUMULATIONS: 4 TO 8 INCHES ABOVE 6000 FEET WITH 
  1 TO 3 INCHES BETWEEN 3500 AND 6000 FEET.

* WINDS: SOUTH 5 TO 15 MPH. NORTH WINDS AT 10 TO 20 MPH WILL 
  DEVELOP LATE WEDNESDAY IN LINCOLN COUNTY.

* IMPACTS: DIFFICULT DRIVING CONDITIONS WITH REDUCED VISIBILITY 
  AND SLICK ROADS. POSSIBLE ROAD CLOSURES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

CAZ524-200400-
/O.CON.KVEF.WW.Y.0003.130220T0600Z-130220T1800Z/
EASTERN MOJAVE DESERT-
INCLUDING THE CITIES OF...MOUNTAIN PASS...MITCHELL CAVERNS
1159 AM PST TUE FEB 19 2013

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 PM THIS
EVENING TO 10 AM PST WEDNESDAY ABOVE 3500 FEET...

A WINTER WEATHER ADVISORY ABOVE 3500 FEET REMAINS IN EFFECT FROM
10 PM THIS EVENING TO 10 AM PST WEDNESDAY FOR THE EASTERN MOJAVE
DESERT.

* TIMING: THE MAIN THREAT FOR SNOWFALL WILL BE BETWEEN 10 PM 
  THIS EVENING AND 4 AM WEDNESDAY. SOME LIGHTER PRECIPITATION IS 
  POSSIBLE BEFORE AND AFTER. 

* SNOW LEVEL: LOWERING TO NEAR 3500 FEET.

* TOTAL SNOW ACCUMULATIONS: 1 TO 3 INCHES.

* WINDS: SOUTHWEST 10 TO 15 MPH.

* IMPACTS: DIFFICULT DRIVING CONDITIONS WITH REDUCED VISIBILITY
  AND SLICK ROADS. MOTORISTS TRAVELING ALONG INTERSTATE 15 NEAR
  MOUNTAIN PASS SHOULD USE EXTREME CAUTION DUE TO THE POTENTIAL
  FOR VERY SLICK ROAD CONDITIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$
3 follow-up statements
571 
WWUS45 KVEF 200350
WSWVEF

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
750 PM PST TUE FEB 19 2013

.A COLD PACIFIC STORM WILL MOVE ACROSS THE AREA THROUGH
WEDNESDAY. PERIODS OF MODERATE TO HEAVY SNOW CAN BE EXPECTED
OVERNIGHT INTO WEDNESDAY MORNING IN THE SIERRA AND ABOVE 3500
FEET IN PORTIONS OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND
EASTERN SAN BERNARDINO COUNTY. HEAVY SNOW IS ALSO LIKELY IN THE
MORONGO BASIN AREA THROUGH EARLY WEDNESDAY MORNING. SNOW MAY
LINGER INTO EARLY WEDNESDAY EVENING ACROSS MOHAVE AND LINCOLN
COUNTIES.

CAZ525-201200-
/O.CON.KVEF.WS.W.0001.130220T0600Z-130220T1800Z/
MORONGO BASIN-
INCLUDING THE CITIES OF...MORONGO VALLEY...YUCCA VALLEY
750 PM PST TUE FEB 19 2013

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST
WEDNESDAY ABOVE 2000 FEET...

A WINTER STORM WARNING FOR AREAS ABOVE 2000 FEET IN THE MORONGO
BASIN REMAINS IN EFFECT UNTIL 10 AM PST WEDNESDAY.

* TIMING: OVERNIGHT THROUGH EARLY WEDNESDAY MORNING.

* SNOW LEVEL: ABOVE 2000 FEET.

* TOTAL SNOW ACCUMULATIONS: 2 TO 4 INCHES ABOVE 2000 FEET WITH 
  LOCAL AMOUNTS UP TO 6 INCHES POSSIBLE.

* WINDS: SOUTHWEST 15 TO 25 MPH THEN BECOMING LIGHT AND 
  VARIABLE AFTER MIDNIGHT. 

* IMPACTS: DIFFICULT DRIVING CONDITIONS WITH REDUCED VISIBILITY 
  AND SLICK ROADS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  ONLY TRAVEL IN AN
EMERGENCY SINCE SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT
WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA
FLASHLIGHT...FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN
EMERGENCY. 
&&

$$

CAZ519-201200-
/O.CON.KVEF.WW.Y.0003.000000T0000Z-130220T1200Z/
EASTERN SIERRA SLOPES-
INCLUDING THE CITIES OF...ASPENDELL...WHITNEY PORTAL
750 PM PST TUE FEB 19 2013

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST
WEDNESDAY...

A WINTER WEATHER ADVISORY REMAINS IN EFFECT FOR THE EASTERN SIERRA
SLOPES UNTIL 4 AM PST WEDNESDAY.

* TIMING: OVERNIGHT.

* TOTAL SNOW ACCUMULATIONS: 6 TO 10 INCHES ABOVE 8000 FEET WITH 
  3 TO 6 INCHES BELOW 8000 FEET.

* WINDS: NORTHWEST 10 TO 20 MPH WITH GUSTS TO 30 MPH.

* IMPACTS: DIFFICULT DRIVING CONDITIONS AND POSSIBLE ROAD 
  CLOSURES ABOVE 8000 FEET. NEAR WHITEOUT CONDITIONS AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT
VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND
BLOWING SNOW. USE CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN
AREAS.

&&

$$

NVZ014-201200-
/O.CON.KVEF.WW.Y.0003.000000T0000Z-130221T0000Z/
ESMERALDA AND CENTRAL NYE COUNTY-
INCLUDING THE CITIES OF...BEATTY...GOLDFIELD...SILVER PEAK...DYER
750 PM PST TUE FEB 19 2013

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST
WEDNESDAY...

A WINTER WEATHER ADVISORY REMAINS IN EFFECT FOR ESMERALDA AND
CENTRAL NYE COUNTIES UNTIL 4 PM PST WEDNESDAY.

* TIMING: THE HEAVIEST SNOW IS EXPECTED THIS EVENING THROUGH 4 AM
  WEDNESDAY. ALTHOUGH SNOWFALL WILL PROBABLY BE LIGHTER DURING THE
  DAY WEDNESDAY...STRONG NORTH WINDS WILL CAUSE AREAS OF BLOWING
  SNOW.

* TOTAL SNOW ACCUMULATIONS: MAINLY 3 TO 5 INCHES BUT UP TO 8 
  INCHES ABOVE 7000 FEET.

* WINDS: MAINLY SOUTH 10 TO 20 MPH WITH GUSTS TO 30 MPH IN THE
  EVENING. NORTHWEST WINDS 20 TO 30 WITH GUSTS TO 40 MPH WILL
  SPREAD INTO THE AREA AFTER MIDNIGHT.

* IMPACTS: DIFFICULT DRIVING CONDITIONS AND POSSIBLE ROAD 
  CLOSURES. NEAR WHITEOUT CONDITIONS AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT
VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND
BLOWING SNOW. USE CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN
AREAS.

&&

$$

NVZ018-019-201200-
/O.CON.KVEF.WW.Y.0003.130220T0600Z-130220T1800Z/
SHEEP RANGE-SPRING MOUNTAINS-RED ROCK CANYON-
INCLUDING...THE TOWN OF MT CHARLESTON...RED ROCK
750 PM PST TUE FEB 19 2013

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
WEDNESDAY...

A WINTER WEATHER ADVISORY REMAINS IN EFFECT FOR THE CLARK COUNTY
MOUNTAINS UNTIL 10 AM PST WEDNESDAY.

* TIMING: HEAVY SNOW AT TIMES OVERNIGHT THROUGH 10 AM WEDNESDAY.
  SOME LIGHT SNOWFALL MAY LINGER AFTER 10 AM.

* TOTAL SNOW ACCUMULATIONS: 5 TO 10 INCHES ABOVE 7000 FEET WITH 
  2 TO 5 INCHES BETWEEN 4000 AND 7000 FEET.

* WINDS: VARIABLE 5 TO 15 MPH.

* IMPACTS: PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL 
  DIFFICULTIES. KYLE CANYON ROAD...LEE CANYON ROAD AND DEER 
  CREEK ROAD WILL LIKELY BE IMPACTED. HIGHWAY 160 OVER 
  MOUNTAIN SPRINGS SUMMIT MAY ALSO BE IMPACTED AS WELL AS THE 
  UPPER PORTION OF THE RED ROCK LOOP.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

AZZ001-003-NVZ015-201200-
/O.CON.KVEF.WW.Y.0003.130220T0600Z-130221T0000Z/
NORTHWEST PLATEAU-NORTHWEST DESERTS-LINCOLN COUNTY-
INCLUDING THE CITIES OF...COLORADO CITY...
PIPE SPRING NATIONAL MONUMENT...TUWEEP...MT TRUMBULL...
VALENTINE...CALIENTE...PIOCHE...PANACA...HIKO...ALAMO...RACHEL
750 PM PST TUE FEB 19 2013 /850 PM MST TUE FEB 19 2013/

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST /5 PM
MST/ WEDNESDAY ABOVE 3500 FEET...

A WINTER WEATHER ADVISORY FOR AREAS ABOVE 3500 FEET IN MOHAVE AND
LINCOLN COUNTIES REMAINS IN EFFECT UNTIL 4 PM PST /5 PM MST/
WEDNESDAY.

* TIMING: PERIODS OF HEAVY SNOW ARE POSSIBLE LATE TONIGHT THROUGH
  WEDNESDAY MORNING. SNOWFALL WILL BEGIN TO TAPER OFF WEDNESDAY
  AFTERNOON.

* SNOW LEVEL: ABOVE 3500 FEET.

* TOTAL SNOW ACCUMULATIONS: 4 TO 8 INCHES ABOVE 6000 FEET WITH 
  1 TO 3 INCHES BETWEEN 3500 AND 6000 FEET.

* WINDS: SOUTH 5 TO 15 MPH. NORTH WINDS AT 10 TO 20 MPH WILL 
  DEVELOP LATE WEDNESDAY IN LINCOLN COUNTY.

* IMPACTS: DIFFICULT DRIVING CONDITIONS WITH REDUCED VISIBILITY 
  AND SLICK ROADS. POSSIBLE ROAD CLOSURES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

CAZ524-201200-
/O.CON.KVEF.WW.Y.0003.130220T0600Z-130220T1800Z/
EASTERN MOJAVE DESERT-
INCLUDING THE CITIES OF...MOUNTAIN PASS...MITCHELL CAVERNS
750 PM PST TUE FEB 19 2013

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
WEDNESDAY ABOVE 3500 FEET...

A WINTER WEATHER ADVISORY FOR AREAS ABOVE 3500 FEET IN NORTHEAST
SAN BERNARDINO COUNTY REMAINS IN EFFECT UNTIL 10 AM PST WEDNESDAY.

* TIMING: OVERNIGHT THROUGH 4 AM WEDNESDAY.

* SNOW LEVEL: ABOVE 3500 FEET.

* TOTAL SNOW ACCUMULATIONS: 1 TO 3 INCHES.

* WINDS: SOUTHWEST 10 TO 15 MPH.

* IMPACTS: DIFFICULT DRIVING CONDITIONS WITH REDUCED VISIBILITY 
  AND SLICK ROADS. MOTORISTS TRAVELING ALONG INTERSTATE 15 
  NEAR MOUNTAIN PASS SHOULD USE EXTREME CAUTION DUE TO THE 
  POTENTIAL FOR VERY SLICK ROAD CONDITIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

MORGAN
281 
WWUS45 KVEF 201152
WSWVEF

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
352 AM PST WED FEB 20 2013

.A COLD PACIFIC STORM WILL MOVE ACROSS THE AREA TODAY RESULTING IN
PERIODS OF MODERATE TO HEAVY SNOW ACROSS PORTIONS OF THE MOJAVE
DESERT AND THE SOUTHERN GREAT BASIN.

CAZ519-201300-
/O.EXP.KVEF.WW.Y.0003.000000T0000Z-130220T1200Z/
EASTERN SIERRA SLOPES-
INCLUDING THE CITIES OF...ASPENDELL...WHITNEY PORTAL
352 AM PST WED FEB 20 2013

...WINTER WEATHER ADVISORY WILL EXPIRE AT 4 AM PST EARLY THIS
MORNING...

THE WINTER WEATHER ADVISORY WILL EXPIRE AT 4 AM PST EARLY THIS
MORNING. 

ALTHOUGH LIGHT SNOW SHOWERS WILL CONTINUE THROUGH THE
MORNING...ADDITIONAL SNOW ACCUMULATION IS NOT LIKELY TO BE SEEN.
THUS WILL ALLOW THE WINTER WEATHER ADVISORY TO EXPIRE AS OF 4 AM
PST THIS MORNING.

$$

CAZ525-201800-
/O.CON.KVEF.WS.W.0001.000000T0000Z-130220T1800Z/
MORONGO BASIN-
INCLUDING THE CITIES OF...MORONGO VALLEY...YUCCA VALLEY
352 AM PST WED FEB 20 2013

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING ABOVE 2000 FEET...

A WINTER STORM WARNING ABOVE 2000 FEET REMAINS IN EFFECT UNTIL
10 AM PST THIS MORNING FOR THE MORONGO BASIN. 

* TIMING: LOCALLY HEAVY SNOW POSSIBLE THROUGH 9 AM BEFORE TAPERING
  OFF DURING THE LATE MORNING.

* SNOW LEVEL: ABOVE 2000 FEET.

* TOTAL SNOW ACCUMULATIONS: 1 TO 3 INCHES ABOVE 2000 FEET WITH
  LOCAL AMOUNTS UP TO 6 INCHES POSSIBLE.

* WINDS: SOUTHWEST 15 TO 25 MPH WITH LOCAL GUSTS TO NEAR 45 MPH
  POSSIBLE THROUGH THE MORNING.

* IMPACTS: DIFFICULT DRIVING CONDITIONS WITH REDUCED VISIBILITY 
  AND SLICK ROADS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  ONLY TRAVEL IN AN
EMERGENCY SINCE SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT
WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA
FLASHLIGHT...FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN
EMERGENCY. 
&&

$$

NVZ014-201815-
/O.CON.KVEF.WW.Y.0003.000000T0000Z-130221T0000Z/
ESMERALDA AND CENTRAL NYE COUNTY-
INCLUDING THE CITIES OF...BEATTY...GOLDFIELD...SILVER PEAK...DYER
352 AM PST WED FEB 20 2013

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON...

A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON FOR ESMERALDA AND CENTRAL NYE COUNTY.

* TIMING: SNOW WILL BE TAPERING OFF EARLY THIS MORNING WITH LIGHT
  SNOW SHOWERS EXPECTED HOWEVER INTO THE AFTERNOON. ALTHOUGH THE
  SNOWFALL WILL BE LIGHTER DURING THE DAY TODAY...STRONG NORTH
  WINDS WILL CAUSE AREAS OF BLOWING SNOW.

* TOTAL SNOW ACCUMULATIONS: MAINLY 3 TO 5 INCHES BUT UP TO 8 
  INCHES POSSIBLE ABOVE 7000 FEET.

* WINDS: NORTHWEST WINDS 20 TO 30 WITH GUSTS TO 40 MPH WILL SPREAD
  INTO THE AREA THIS MORNING.

* IMPACTS: DIFFICULT DRIVING CONDITIONS AND POSSIBLE ROAD 
  CLOSURES. NEAR WHITEOUT CONDITIONS AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT
VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND
BLOWING SNOW. USE CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN
AREAS.

&&

$$

NVZ018-019-201800-
/O.CON.KVEF.WW.Y.0003.000000T0000Z-130220T1800Z/
SHEEP RANGE-SPRING MOUNTAINS-RED ROCK CANYON-
INCLUDING...THE TOWN OF MT CHARLESTON...RED ROCK
352 AM PST WED FEB 20 2013

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING FOR THE SHEEP RANGE...SPRING MOUNTAINS AND THE RED ROCK
CANYON AREA.

* TIMING: HEAVY SNOW AT TIMES THROUGH 9 AM BEFORE TAPERING OFF TO
  LIGHT SNOW SHOWERS INTO THE AFTERNOON.

* TOTAL SNOW ACCUMULATIONS: 3 TO 8 INCHES ABOVE 7000 FEET WITH 1
  TO 3 INCHES POSSIBLE BETWEEN 4000 AND 7000 FEET.

* WINDS: VARIABLE 5 TO 15 MPH.

* IMPACTS: PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL 
  DIFFICULTIES. KYLE CANYON ROAD...LEE CANYON ROAD AND DEER 
  CREEK ROAD WILL LIKELY BE IMPACTED. HIGHWAY 160 OVER 
  MOUNTAIN SPRINGS SUMMIT MAY ALSO BE IMPACTED AS WELL AS THE 
  UPPER PORTION OF THE RED ROCK LOOP.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

AZZ001-003-NVZ015-201815-
/O.CON.KVEF.WW.Y.0003.000000T0000Z-130221T0000Z/
NORTHWEST PLATEAU-NORTHWEST DESERTS-LINCOLN COUNTY-
INCLUDING THE CITIES OF...COLORADO CITY...
PIPE SPRING NATIONAL MONUMENT...TUWEEP...MT TRUMBULL...
VALENTINE...CALIENTE...PIOCHE...PANACA...HIKO...ALAMO...RACHEL
352 AM PST WED FEB 20 2013 /452 AM MST WED FEB 20 2013/

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST /5 PM
MST/ THIS AFTERNOON ABOVE 3500 FEET...

A WINTER WEATHER ADVISORY ABOVE 3500 FEET REMAINS IN EFFECT UNTIL
4 PM PST /5 PM MST/ THIS AFTERNOON FOR THE NORTHWEST PLATEAU...THE
NORTHWEST DESERTS...AND LINCOLN COUNTY.

* TIMING: PERIODS OF HEAVY SNOW ARE POSSIBLE THROUGH THIS MORNING
  BEFORE TAPERING OFF DURING THE AFTERNOON.

* SNOW LEVEL: ABOVE 3500 FEET.

* TOTAL SNOW ACCUMULATIONS: 4 TO 8 INCHES ABOVE 6000 FEET WITH 
  1 TO 3 INCHES BETWEEN 3500 AND 6000 FEET.

* WINDS: SOUTH 5 TO 15 MPH. NORTH WINDS AT 10 TO 20 MPH WILL
  DEVELOP LATE TODAY IN LINCOLN COUNTY.

* IMPACTS: DIFFICULT DRIVING CONDITIONS WITH REDUCED VISIBILITY 
  AND SLICK ROADS. POSSIBLE ROAD CLOSURES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

CAZ524-201800-
/O.CON.KVEF.WW.Y.0003.000000T0000Z-130220T1800Z/
EASTERN MOJAVE DESERT-
INCLUDING THE CITIES OF...MOUNTAIN PASS...MITCHELL CAVERNS
352 AM PST WED FEB 20 2013

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING ABOVE 3500 FEET...

A WINTER WEATHER ADVISORY ABOVE 3500 FEET REMAINS IN EFFECT UNTIL
10 AM PST THIS MORNING FOR THE EASTERN MOJAVE DESERT. 

* TIMING: POSSIBLY HEAVY SNOW AT TIMES THROUGH 9 AM PST BEFORE
  DECREASING TO LIGHT SNOW SHOWERS DURING THE LATE MORNING.

* SNOW LEVEL: ABOVE 3500 FEET.

* TOTAL SNOW ACCUMULATIONS: 1 TO 3 INCHES.

* WINDS: SOUTHWEST 10 TO 15 MPH.

* IMPACTS: DIFFICULT DRIVING CONDITIONS WITH REDUCED VISIBILITY 
  AND SLICK ROADS. MOTORISTS TRAVELING ALONG INTERSTATE 15 
  NEAR MOUNTAIN PASS SHOULD USE EXTREME CAUTION DUE TO THE 
  POTENTIAL FOR VERY SLICK ROAD CONDITIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$
197 
WWUS45 KVEF 201754
WSWVEF

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
954 AM PST WED FEB 20 2013

.A COLD PACIFIC STORM WILL CONTINUE TO MOVE ALONG THE SOUTHERN
EDGES OF THE AREA TODAY RESULTING IN PERIODS OF MODERATE TO HEAVY
SNOW ACROSS PORTIONS OF THE MOJAVE DESERT AND THE SOUTHERN GREAT
BASIN.

CAZ525-201900-
/O.EXP.KVEF.WS.W.0001.000000T0000Z-130220T1800Z/
MORONGO BASIN-
INCLUDING THE CITIES OF...MORONGO VALLEY...YUCCA VALLEY
954 AM PST WED FEB 20 2013

...WINTER STORM WARNING WILL EXPIRE AT 10 AM PST THIS MORNING
ABOVE 2000 FEET...

THE WINTER STORM WARNING ABOVE 2000 FEET FOR THE MORONGO BASIN WILL
EXPIRE AT 10 AM PST THIS MORNING.

THE WINTER STORM WARNING WILL BE ALLOWED TO EXPIRE AT 10 AM. LIGHT
SNOW SHOWERS MAY CONTINUE THROUGH NOON ACROSS THE MORONGO BASIN
AND YUCCA VALLEY AREA BUT NO ADDITIONAL ACCUMULATIONS ARE
EXPECTED. HOWEVER...USE CAUTION ON AREA ROADWAYS TODAY AS WET ROAD
CONDITIONS COULD MAKE TRAVEL DIFFICULT.

$$

NVZ018-019-201900-
/O.EXP.KVEF.WW.Y.0003.000000T0000Z-130220T1800Z/
SHEEP RANGE-SPRING MOUNTAINS-RED ROCK CANYON-
INCLUDING...THE TOWN OF MT CHARLESTON...RED ROCK
954 AM PST WED FEB 20 2013

...WINTER WEATHER ADVISORY WILL EXPIRE AT 10 AM PST THIS
MORNING...

THE WINTER WEATHER ADVISORY WILL EXPIRE AT 10 AM PST THIS
MORNING FOR THE SPRING MOUNTAINS AND RED ROCK CANYON.

SNOW SHOWERS WILL CONTINUE ACROSS THE SPRING MOUNTAINS AND SHEEP
RANGE THROUGH THIS AFTERNOON BUT ONLY LIGHT ACCUMULATIONS ARE
EXPECTED.

$$

CAZ524-201900-
/O.EXP.KVEF.WW.Y.0003.000000T0000Z-130220T1800Z/
EASTERN MOJAVE DESERT-
INCLUDING THE CITIES OF...MOUNTAIN PASS...MITCHELL CAVERNS
954 AM PST WED FEB 20 2013

...WINTER WEATHER ADVISORY WILL EXPIRE AT 10 AM PST THIS MORNING
ABOVE 3500 FEET...

THE WINTER WEATHER ADVISORY ABOVE 3500 FEET FOR THE EASTERN MOJAVE
DESERT WILL EXPIRE AT 10 AM PST THIS MORNING.

THE THREAT OF ACCUMULATING SNOW HAS ENDED AND THE ADVISORY WILL BE
ALLOWED TO EXPIRE ON TIME. HOWEVER...RAIN SHOWERS IN THE AREA
COULD STILL LEAD TO SLICK ROAD CONDITIONS AT TIMES THROUGH NOON.

$$

NVZ014-210000-
/O.CON.KVEF.WW.Y.0003.000000T0000Z-130221T0000Z/
ESMERALDA AND CENTRAL NYE COUNTY-
INCLUDING THE CITIES OF...BEATTY...GOLDFIELD...SILVER PEAK...DYER
954 AM PST WED FEB 20 2013

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON...

A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON FOR ESMERALDA AND CENTRAL NYE COUNTIES.

* TIMING: LIGHT SNOW SHOWERS ARE EXPECTED INTO THE AFTERNOON.
  ALTHOUGH THE SNOWFALL WILL BE LIGHTER TODAY...GUSTY NORTH WINDS
  WILL CAUSE AREAS OF BLOWING SNOW.

* TOTAL SNOW ACCUMULATIONS: LITTLE TO NONE.

* WINDS: NORTHWEST WINDS 20 TO 30 WITH GUSTS UP TO 40 MPH.

* IMPACTS: SLICK ROADS AND POSSIBLE NEAR WHITEOUT CONDITIONS AT
  TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW MEANS THAT
VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND
BLOWING SNOW. USE CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN
AREAS.

&&

$$

AZZ001-003-NVZ015-210000-
/O.CON.KVEF.WW.Y.0003.000000T0000Z-130221T0000Z/
NORTHWEST PLATEAU-NORTHWEST DESERTS-LINCOLN COUNTY-
INCLUDING THE CITIES OF...COLORADO CITY...
PIPE SPRING NATIONAL MONUMENT...TUWEEP...MT TRUMBULL...
VALENTINE...CALIENTE...PIOCHE...PANACA...HIKO...ALAMO...RACHEL
954 AM PST WED FEB 20 2013 /1054 AM MST WED FEB 20 2013/

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST /5 PM
MST/ THIS AFTERNOON ABOVE 3500 FEET...

A WINTER WEATHER ADVISORY ABOVE 3500 FEET REMAINS IN EFFECT UNTIL
4 PM PST /5 PM MST/ THIS AFTERNOON FOR LINCOLN COUNTY AND THE
NORTHWEST PLATEAU IN MOHAVE COUNTY.

* TIMING: PERIODS OF SNOW ARE POSSIBLE THROUGH THE REMAINDER OF
  THE MORNING AND INTO THE AFTERNOON.

* SNOW LEVEL: ABOVE 3500 FEET.

* TOTAL SNOW ACCUMULATIONS: 4 TO 8 INCHES ABOVE 6000 FEET WITH 
  1 TO 3 INCHES BETWEEN 3500 AND 6000 FEET.

* WINDS: SOUTH 5 TO 15 MPH. NORTH WINDS AT 10 TO 20 MPH WILL 
  DEVELOP LATE TODAY IN LINCOLN COUNTY.

* IMPACTS: DIFFICULT DRIVING CONDITIONS WITH REDUCED VISIBILITY 
  AND SLICK ROADS. POSSIBLE ROAD CLOSURES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

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 Las Vegas, NV wrote its last area forecast discussion before this winter storm warning went out at Feb 19, 8:05 AM PST, 3 hours 54 minutes earlier.

Area forecast discussion, Feb 19, 8:05 AM PST, 3 hours 54 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
805 AM PST TUE FEB 19 2013

.SYNOPSIS...A STRONG PACIFIC STORM WILL MOVE INTO THE AREA TODAY
BEFORE SHIFTING EAST ON WEDNESDAY. THIS WILL RESULT IN AREAS OF
GUSTY WINDS AND WIDESPREAD RAIN AND SNOW BEGINNING THIS AFTERNOON
AND THEN CONTINUING INTO WEDNESDAY. SNOWFALL MAY BE SEEN EVEN IN
SOME MOJAVE DESERT VALLEYS ALTHOUGH ACCUMULATING SNOW IS EXPECTED
MAINLY ABOVE 3500 FEET. MUCH COOLER TEMPERATURES CAN BE EXPECTED BY
WEDNESDAY WITH THE COOL AND SOMEWHAT UNSETTLED CONDITIONS CONTINUING
THROUGH FRIDAY.
&&

.UPDATE...INCREASED SKY COVER TO BETTER REFLECT SATELLITE AND MODEL
TRENDS FOR TODAY OTHERWISE WILL BE FOCUSING ALL ATTENTION THIS
MORNING ON THE UPCOMING STORM. GRIDS HAVE BEEN SENT. -SALMEN-
&&

.PREVIOUS DISCUSSION...300 AM PST...

.SHORT TERM...TODAY THROUGH THURSDAY NIGHT....OVERALL THE PACIFIC
STORM WHICH HAS BEEN DISCUSSED THE PAST SEVERAL DAYS REMAINS ON
TRACK RESULTING IN VERY LITTLE CHANGE TO THE OVERALL FORECAST. THE
UPPER LOW AS OF 2 AM PST THIS MORNING IS CENTERED OFF THE OREGON
COAST AND WITH THE EXCEPTION OF A FEW HIGH CLOUDS OVER THE NORTHWEST
PORTION OF THE CWA...LITTLE IMPACT TO THE AREA AS OF YET. HOWEVER BY
00Z WEDNESDAY THE LOW CENTER IS EXPECTED TO BE OVER THE SAN
FRANCISCO AREA AND THEN DROP FURTHER SOUTH TO SOUTHERN CALIFORNIA BY
12Z WEDNESDAY BEFORE EJECTING EAST ACROSS ARIZONA BY 00Z THURSDAY.
WITH THIS SCENARIO...PRECIPITATION SHOULD BE MOVING INTO THE
SOUTHERN SIERRA BY LATE THIS MORNING...SPREADING ACROSS THE MOHAVE
DESERT/SOUTHERN GREAT BASIN THIS AFTERNOON/TONIGHT AND THEN DRYING
FROM THE WEST ON WEDNESDAY.

OVERALL TOTAL SNOW ACCUMULATIONS LOOK TO REMAIN BELOW WARNING LEVELS
AND THE VARIOUS WINTER WEATHER ADVISORIES ISSUED MONDAY AFTERNOON
REMAIN IN EFFECT. HOWEVER THREE AREAS OF CONCERN WHICH WILL NEED TO
BE MONITORED THROUGH THIS STORM WILL BE ESMERALDA COUNTY...THE
MORONGO BASIN AND THE SPRING MOUNTAINS OF SOUTHERN NEVADA.
FRONTOGENESIS/UPPER DYNAMICS FOR ESMERALDA AND UPSLOPE CONDITIONS
FOR THE MORONGO BASIN/SPRING MOUNTAINS MAY PRODUCE WINDOWS FOR
HEAVIER PRECIPITATION TO OCCUR WHICH MAY PUSH ACCUMULATIONS INTO
WARNING LEVELS. CONFIDENCE AT THIS TIME IS NOT HIGH ENOUGH TO
UPGRADE THE WINTER WEATHER ADVISORIES HOWEVER...SO AS MENTIONED WILL
MONITOR THROUGH THE STORM.

SOUTHWEST WINDS WILL INCREASE ACROSS MUCH OF THE CWA THIS AFTERNOON
AHEAD OF THIS SYSTEM WITH WIND ADVISORIES REMAINING IN EFFECT FOR
THIS AFTERNOON AND EVENING...EXTENDING INTO TONIGHT FOR THE WESTERN
MOHAVE DESERT REGION. WINDS WILL BE TURNING TO THE NORTH AS THE
ASSOCIATED COLD FRONT PUSHES ACROSS THE AREA WITH THE STRONGEST
NORTH WINDS BEING SEEN OVER ESMERALDA/CENTRAL NYE COUNTY ON
WEDNESDAY. THE FRONTAL PASSAGE IS EXPECTED ACROSS THE LAS VEGAS
VALLEY AROUND 00Z THURSDAY.

TWO ADDITIONAL WEAK SHORT WAVES WILL BE DROPPING SOUTH ON THURSDAY
IN THE NORTHWEST FLOW ALOFT. THE FIRST WILL BE ALONG THE WEST COAST
AND HAVE LITTLE IMPACT ON OUR WEATHER WHILE THE SECOND SYSTEM IS
EXPECTED TO DROP SOUTH OVER THE EASTERN GREAT BASIN. THIS WILL KEEP
UNSETTLE CONDITIONS OVER THE REGION FOR THURSDAY AND THURSDAY
NIGHT...HOWEVER ANY PRECIPITATION IS EXPECTED TO BE LIGHT.

TEMPERATURES WILL BE LOWERING TO BELOW NORMAL ON WEDNESDAY...WITH
LITTLE CHANGE EXPECTED FOR THURSDAY.

.LONG TERM...NORTHWEST FLOW ALOFT IS EXPECTED TO BE IN PLACE ACROSS
THE AREA ON FRIDAY AFTERNOON BEHIND THE DEPARTING STORM SYSTEM. A
POSITIVELY TILTED SHORTWAVE RIDGE IS FORECAST TO SHIFT INTO NEVADA
BY FRIDAY EVENING WHICH WOULD SUPPORT A SLIGHT WARMING TREND FOR
THEN. AS THE RIDGE AXIS SLIDES ACROSS THE AREA ON SATURDAY IT WILL
OPEN THE DOOR FOR ANOTHER SYSTEM TO DROP SOUTHEAST INTO NORTHERN
NEVADA BY LATE SATURDAY MORNING. ACROSS OUR AREA SOUTHWEST FLOW
AHEAD OF THIS SYSTEM SHOULD HELP TO MIX THINGS BETTER AND PUSH HIGH
TEMPS BACK CLOSER TO NORMAL VALUES OVER THE MOJAVE DESERT.

THE MODELS AGREE AT BRINGING A TROUGH AXIS THROUGH SATURDAY NIGHT
BUT SHOW A BIG SPREAD IN WHERE THE SYSTEM TRACKS. THE 00Z ECMWF WAS
FURTHER WEST INITIALLY AND THUS DIGS THE SYSTEM DEEPER ACROSS OUR
AREA WHILE THE 00Z OPERATIONAL GFS AND GEM BOTH BRING THE SYSTEM
INTO NORTHEASTERN NEVADA INITIALLY AND THUS SWIPE OUR AREA MORE WITH
IT. THE RESULT WITH THE ECMWF IS A COLDER AND WETTER SYSTEM FOR US
WHILE THE GFS/GEM IDEA WOULD FAVOR A MUCH DRIER FORECAST AND LIKELY
NOT AS GREAT OF A COOLDOWN. FOR NOW THE FORECAST LEANS MORE TOWARD
THE ECMWF SOLUTION WHICH SPREADS POPS SOUTH DURING THE DAY ON
SATURDAY ACROSS THE SOUTHERN GREAT BASIN AND THEN INTO THE MOJAVE
DESERT BY SATURDAY NIGHT. FOR NOW WE KEPT THE GREATEST POPS ACROSS
LINCOLN COUNTY AND TO A LESSER EXTENT THE SPRING MOUNTAINS/SHEEP
RANGE AND HIGHER TERRAIN OF MOHAVE COUNTY. ONE THING WORTH NOTING IS
THAT 700 MB TEMPS ARE FORECAST BY BOTH THE ECMWF AND GFS TO DROP TO
NEAR -12C WHICH WOULD SUPPORT SNOW LEVELS NEAR 2800 FEET OR SO BY
SUNDAY MORNING. ON THE BACK SIDE OF THIS SYSTEM WINDS SHOULD PICK UP
FROM THE NORTHWEST AS AN 80 KT+ JET AT 250 MB MOVES ACROSS NEVADA.
700 MB WINDS SHOW 40 KT+ VALUES OFF BOTH THE GFS AND ECMWF BUT THE
WINDFIELDS DO NOT ALIGN PERFECTLY IN THE LOW-LEVELS WHICH WOULD NOT
FAVOR THE HIGHER WINDFIELDS ALOFT FROM FULLY MAKING IT DOWN TO THE
SURFACE. AT THIS TIME I BUMPED UP GUIDANCE WINDS A BIT SINCE THEY
ARE LIKELY UNDERDONE. FOR TEMPS...I FAVORED THE COLDER ECMWF WHICH
KEEPS TEMPS ON SUNDAY BELOW NORMAL.

ANOTHER POSITIVELY TILTED SHORTWAVE RIDGE IS FORECAST TO SLIDE
OVERHEAD ON MONDAY WHICH WOULD FAVOR DRY CONDITIONS AGAIN AND SOME
WARMING. ANOTHER SYSTEM IS SHOWN TO HEAD INTO NORTHERN NEVADA BY
MONDAY NIGHT AND MOVE INTO UTAH ON TUESDAY BUT AT THIS TIME LOOKS TO
STAY FAR ENOUGH NORTH TO AT BEST CLIP THE NORTHERNMOST PARTS OF THE
AREA WITH A FEW SHOWERS THEN. TEMPS SHOULD REMAIN BELOW NORMAL.
&&

.AVIATION...FOR MCCARRAN...WINDS ARE EXPECTED TO INCREASE FROM THE
SOUTH-SOUTHWEST ESPECIALLY AFTER 20Z WITH GUSTS TO NEAR 25 KTS.
SCT-BKN CLOUDS AOA 20K FEET THIS MORNING BECOMING BKN-OVC THIS
EVENING WITH BASES LOWERING TO 8K-12K FEET. AFTER 05Z
WEDNESDAY...CIGS ARE EXPECTED TO LOWER FURTHER...POSSIBLY DROPPING
AS LOW AS 3K-5K FEET. WHILE PRECIPITATION IS POSSIBLE AS EARLY AS
05Z WEDNESDAY AT THE AIRPORT COMPLEX...THE BEST WINDOW LOOKS TO BE
BETWEEN 10Z AND 18Z WEDNESDAY...WITH THE CHANCE DECREASING
AFTERWARD. WHILE PRECIPITATION IS MOST LIKELY TO BE IN THE FORM OF
RAIN...ANY HEAVIER PERIODS OF PRECIPITATION COULD RESULT IN SNOW AS
WELL AT THE AIRPORT...HOWEVER THE ODDS OF ANY ACCUMULATION AT THE
AIRPORT ARE LESS THAN 10 PERCENT. IT IS WORTH NOTING THAT THE
COLDEST MODEL HAS SHOWN PRECIPITATION CHANGING OVER ENTIRELY TO SNOW
AT THE AIRPORT AROUND 12Z WEDNESDAY. PATCHY FOG IS ALSO POSSIBLE
TONIGHT AND MOUNTAIN OBSCURATIONS ARE EXPECTED. VSBY MAY BE REDUCED
TO MVFR OR LOWER...ESPECIALLY IF ANY SNOW FALLS. CONFIDENCE IN THE
TAF IS HIGHEST WITH THE WIND AND MODERATE AT BEST FOR TIMING AND THE
TYPE OF PRECIPITATION ALONG WITH CIGS AND VSBY.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...SOUTHWEST WINDS WILL INCREASE TODAY AHEAD OF A STORM
SYSTEM DROPPING INTO THE REGION. WINDS OF 20-30 KTS WILL BE COMMON
AROUND THE AREA WITH STRONGER WINDS OF 30-40 KTS OVER WESTERN AND
CENTRAL SAN BERNARDINO AND MOHAVE COUNTIES. PRECIPITATION WILL
SPREAD INTO THE EASTERN SLOPES OF THE SOUTHERN SIERRA BY LATE THIS
AFTERNOON AND THEN ACROSS THE REMAINDER OF THE REGION THIS EVENING
INTO LATER TONIGHT. SNOW LEVELS ARE FORECAST TO LOWER FROM NEAR 5K
FEET THIS EVENING TO NEAR 3K FEET BY WEDNESDAY MORNING. CLOUD BASES
LOWERING TO 8K-15K FEET TODAY AND DROPPING TO 3K-6K FEET BY THIS
EVENING. MOUNTAIN OBSCURATIONS ARE EXPECTED ALONG WITH VSBY BEING
REDUCED TO MVFR OR LOWER ESPECIALLY IN ANY SNOW. PATCHY FOG IS
POSSIBLE TONIGHT.
&&

.CLIMATE...HERE ARE SOME FACTS ABOUT SNOW IN THE LAS VEGAS VALLEY...

THE LAST TIME WE HAD MEASURABLE SNOW AT THE OFFICIAL CLIMATE STATION
WAS BACK ON DECEMBER 17TH 2008 WHEN 3.6 INCHES FELL.

THE LAST TIME THERE WAS SNOW AT THE OFFICIAL CLIMATE STATION IN
FEBRUARY WAS ON FEBRUARY 28TH 2007. THE LAST MEASURABLE SNOW IN
FEBRUARY AT THE OFFICIAL CLIMATE STATION WAS BACK ON FEBRUARY 19TH
1990 WHEN 1.4 INCHES FELL.

THE LAST TIME ANY MEASURABLE SNOW FELL IN THE LAS VEGAS VALLEY WAS
ON DECEMBER 1ST 2011 IN THE HIGHER PORTIONS OF ANTHEM WHERE A FEW
TENTHS OF AN INCH FELL. 2 TO 3 INCHES FELL IN SUMMERLIN ON THE
MORNING OF JANUARY 3RD 2011 WITH SNOW STICKING AS LOW AS 2200 FEET
IN THE VALLEY THEN. FOR MEASURABLE SNOW IN FEBRUARY THE LAST WELL
KNOWN EVENT WAS ON FEBRUARY 26TH 1996 WHEN UP TO AN INCH FELL IN
SUMMERLIN.
&&

.VEF WATCHES/WARNINGS/ADVISORIES...
NV...WINTER WEATHER ADVISORY FROM 10 PM THIS EVENING TO 4 PM PST
     WEDNESDAY FOR NVZ015.
     WIND ADVISORY FROM NOON TODAY TO 8 PM PST THIS EVENING FOR
     NVZ017-019.
     WINTER WEATHER ADVISORY FROM 10 PM THIS EVENING TO 10 AM PST
     WEDNESDAY FOR NVZ018-019.
     WINTER WEATHER ADVISORY FROM 4 PM THIS AFTERNOON TO 4 PM PST
     WEDNESDAY FOR NVZ014.
AZ...WINTER WEATHER ADVISORY FROM 11 PM THIS EVENING TO 5 PM MST
     WEDNESDAY FOR AZZ001-003.
     WIND ADVISORY FROM 1 PM THIS AFTERNOON TO 9 PM MST THIS EVENING
     FOR AZZ001-003.
CA...WIND ADVISORY FROM NOON TODAY TO 8 PM PST THIS EVENING FOR
     CAZ522.
     WINTER WEATHER ADVISORY FROM 10 AM THIS MORNING TO 4 AM PST
     WEDNESDAY FOR CAZ519.
     WIND ADVISORY FROM NOON TODAY TO NOON PST WEDNESDAY FOR CAZ523-
     525.
     WINTER WEATHER ADVISORY FROM 10 PM THIS EVENING TO 10 AM PST
     WEDNESDAY FOR CAZ524.
&&

JENSEN/STACHELSKI

HTTP://WEATHER.GOV/LASVEGAS
Hazardous weather outlook, Feb 19, 5:40 AM PST, 6 hours 19 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAS VEGAS NV
540 AM PST TUE FEB 19 2013

AZZ001>003-036-CAZ519>527-NVZ014>022-200800-
NORTHWEST PLATEAU-LOWER COLORADO RIVER VALLEY-NORTHWEST DESERTS-
LAKE MEAD NATIONAL RECREATION AREA-EASTERN SIERRA SLOPES-
OWENS VALLEY-WHITE MOUNTAINS OF INYO COUNTY-
DEATH VALLEY NATIONAL PARK-WESTERN MOJAVE DESERT-
EASTERN MOJAVE DESERT-MORONGO BASIN-CADIZ BASIN-
SAN BERNARDINO COUNTY-UPPER COLORADO RIVER VALLEY-
ESMERALDA AND CENTRAL NYE COUNTY-LINCOLN COUNTY-
NORTHEAST CLARK COUNTY-WESTERN CLARK AND SOUTHERN NYE COUNTY-
SHEEP RANGE-SPRING MOUNTAINS-LAS VEGAS VALLEY-
SOUTHERN CLARK COUNTY-
540 AM PST TUE FEB 19 2013 /640 AM MST TUE FEB 19 2013/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST
ARIZONA...CALIFORNIA AND SOUTHERN NEVADA.

.DAY ONE...TODAY AND TONIGHT

A STRONG PACIFIC STORM WILL MOVE ACROSS THE REGION TODAY INTO
TONIGHT. THIS WILL RESULT IN PERIODS OF RAIN...HEAVY SNOW ABOVE
3500 FEET...AND GUSTY WINDS. VARIOUS WINTER WEATHER AND WIND
ADVISORIES ARE IN EFFECT TODAY AND TONIGHT. PLEASE SEE THE LATEST
FORECAST...GRAPHICS...TWITTER OR FACEBOOK FEEDS FOR THE LATEST DETAILS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SNOW SHOWERS WILL LINGER ACROSS LINCOLN AND MOHAVE COUNTIES ON
WEDNESDAY AS A PACIFIC STORM SYSTEM MOVES OUT OF THE REGION. A
WINTER WEATHER ADVISORY REMAINS IN EFFECT FOR MOHAVE COUNTY ON
WEDNESDAY. SEVERAL WEAK DISTURBANCES WILL KEEP COOL AND UNSETTLED
COOL CONDITIONS OVER THE REGION THURSDAY THROUGH SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
HOWEVER...SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT
WEATHER CONDITIONS ACCORDING TO STANDARD OPERATION PROCEDURES.

Nearby

Winter Storm Warnings in California, 2013Every winter storm warning in 2013

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.