High Wind Watch 15, NWS Las Vegas, NV

416 
WWUS75 KVEF 230430
NPWVEF

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
930 PM PDT FRI APR 22 2011

.STRONG WEST WINDS WILL DEVELOP SATURDAY OVER NORTHWEST SAN
BERNARDINO COUNTY AND PERSIST INTO THE EVENING HOURS.

CAZ523-231200-
/O.UPG.KVEF.HW.A.0015.110423T1700Z-110424T0700Z/
/O.NEW.KVEF.WI.Y.0028.110423T1700Z-110424T0700Z/
WESTERN MOJAVE DESERT-
INCLUDING...BARSTOW...DAGGETT...FORT IRWIN
930 PM PDT FRI APR 22 2011

...WIND ADVISORY IN EFFECT FROM 10 AM SATURDAY TO MIDNIGHT PDT
SATURDAY NIGHT...

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A WIND
ADVISORY FOR THE WESTERN MOJAVE DESERT OF SAN BERNARDINO
COUNTY...WHICH IS IN EFFECT FROM 10 AM SATURDAY TO MIDNIGHT PDT
SATURDAY NIGHT. THIS REPLACES THE HIGH WIND WATCH PREVIOUSLY IN
EFFECT.

* WINDS: WEST WINDS 25 TO 35 MPH WITH GUSTS 45 TO 55 MPH.

* TIMING: WINDS WILL INCREASE LATE IN THE MORNING SATURDAY...PEAK
  IN THE AFTERNOON AND EARLY EVENING...THEN DIMINISH LATE SATURDAY
  EVENING.

* LOCATIONS: FORT IRWIN...BARSTOW...INTERSTATES 15 AND 40.

* IMPACTS: STRONG CROSSWINDS WILL MAKE DRIVING DIFFICULT ON NORTH
  SOUTH ROADS....ESPECIALLY FOR HIGH PROFILE VEHICLES. BLOWING DUST
  COULD REDUCE VISIBILITY TO HALF A MILE OR LESS NEAR DRY LAKE
  BEDS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DRIVERS OF MOTORCYLES...VANS...CAMPERS...TRAILERS...AND ANY
HIGH-PROFILE VEHICLE SHOULD BE ALERT TO HAZARDOUS DRIVING
CONDITIONS DUE TO THESE WINDS. USE EXTRA CAUTION.


&&

$$

JA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
847 AM PDT FRI APR 22 2011

.SYNOPSIS...A DRY WESTERLY FLOW WILL BE OVER THE AREA TODAY WITH
GENERALLY LIGHT WINDS AND NEAR NORMAL TEMPERATURES. A WEAK LOW
PRESSURE SYSTEM WILL SETTLE OVER THE REGION THIS WEEKEND RESULTING
IN INCREASED CLOUD COVER AND LOCALLY BREEZY CONDITIONS. THERE WILL
ALSO BE A CHANCE OF SHOWERS ACROSS PORTIONS OF THE GREAT BASIN.
TEMPERATURES WILL REMAIN FAIRLY CLOSE TO NORMAL.
&&

.UPDATE...SATELLITE LOOP SHOWS FEWER CLOUDS THAN EXPECTED. LOWERED
SKY COVER GRIDS FOR TODAY. NO OTHER CHANGES AT THIS TIME.
&&

.PREV DISCUSSION...
252 AM PDT FRI APR 22 2011

.SHORT TERM...DRY WESTERLY FLOW TODAY WILL BRING SOME HIGH CLOUDS
OVER THE FORECAST AREA...PARTICULARLY THE NORTHERN THIRD. OTHERWISE
DRY CONDITIONS WITH GENERALLY LIGHT WINDS AND NEAR NORMAL
TEMPERATURES CAN BE EXPECTED. A WEAK TROUGH WILL MOVE VERY SLOWLY
ACROSS THE FORECAST AREA TONIGHT THROUGH SUNDAY WHICH WILL BRING
INCREASED CLOUD COVER WITH A CHANCE OF SHOWERS ACROSS THE SOUTHERN
GREAT BASIN. WINDS WILL ALSO INCREASE ONCE AGAIN...ESPECIALLY OVER
WESTERN SAN BERNARDINO COUNTY WHERE GUSTS NEAR 40 MPH CANNOT BE
RULED OUT BOTH SATURDAY AND SUNDAY. THE INCREASED CLOUD COVER MAY
KNOCK HIGH TEMPERATURES DOWN SLIGHTLY BUT OVERALL THEY WILL NOT
DEVIATE SIGNIFICANTLY FROM NORMAL. THE TROUGH WILL FINALLY EXIT TO
THE EAST SUNDAY NIGHT WITH DECREASING CLOUDS.

.LONG TERM...OVERALL THE PATTERN FOR MOST OF NEXT WEEK LOOKS TO BE
AN EXTENSION OF BASICALLY WHAT WE HAVE SEEN OVER THE LAST WEEK WITH
SYSTEMS DIVING BY TO THE NORTH OF THE AREA BRINGING SOME ENHANCED
CLOUDS AND WINDS AT TIMES AND NO REAL WIDESPREAD SHOT AT
PRECIPITATION. NORTHWEST FLOW ALOFT LOOKS TO DRIFT A SYSTEM BY THE
AREA MAINLY OVER NORTHEASTERN NEVADA INTO UTAH ON MONDAY AFTERNOON
INTO MONDAY NIGHT. 700 MB WINDS SHOW SOME VALUES NEAR 50 KTS OFF THE
ECMWF NEAR THE SOUTHERN SIERRA THEN AND OVER LINCOLN COUNTY OFF THE
GFS BUT OTHERWISE ARE LARGELY IN THE 20-30 KT RANGE. NEVERTHELESS
BREEZY TO WINDY CONDITIONS LOOK POSSIBLE THEN ACROSS THE AREA. HIGH
TEMPS SHOULD BE A FEW DEGREES ABOVE NORMAL ON MONDAY THEN LOWER TO
NEAR OR A LITTLE BELOW NORMAL FOR TUESDAY BEHIND THIS SYSTEM.

AN UPPER RIDGE IS SHOWN TO BUILD INTO THE AREA FOR WEDNESDAY
ALLOWING FOR A SLIGHT WARM-UP. THE NEXT SYSTEM AFTERWARDS IS SHOWN
BY THE MODELS TO BE A CLOSED LOW THAT STAYS FURTHER NORTH AND LOOKS
TO MAINLY IMPACT THE PAC NW/SOUTHWESTERN CANADA. FOR US SOUTHWEST
FLOW AHEAD OF THIS SYSTEM SHOULD INCREASE ON THURSDAY ALLOWING FOR
FURTHER WARMING WITH HIGH TEMPS ABOUT 10 DEGREES ABOVE NORMAL. THE
MODELS ARE IN ALRIGHT AGREEMENT IN THIS SYSTEM PASSING THROUGH
SOMETIME ON FRIDAY BUT VARY IN HOW DEEP IT WILL BE THEN. THE ECMWF
AND MANY GFS ENSEMBLES ARE SHOWING A DEEPER AND COOLER SYSTEM WITH
OPERATIONAL GFS MORE SHALLOW. FOR NOW IT LOOKS LIKE THE POTENTIAL
FOR MORE GUSTY WINDS WILL EXIST WITH TEMPS COOLING TO AT LEAST NEAR
NORMAL AND MAYBE A LITTLE COOLER. AS FOR PRECIPITATION...I PLACED
SOME LOW END SLIGHT CHANCE POPS OVER LINCOLN/CENTRAL NYE AND
NORTHERN MOHAVE COUNTIES AS A TIP OF THE HAT TO THE DEEPER SOLUTION
BUT THIS SHOULD BE ANOTHER DRY SYSTEM FOR MUCH OF THE AREA. IF NO
PRECIPITATION FALLS AT MCCARRAN AIRPORT THIS MONTH IT WOULD BE ONLY
THE 5TH APRIL TO SEE NOT A DROP OF PRECIPITATION AT THE OFFICIAL LAS
VEGAS CLIMATE STATION SINCE RECORDS STARTED IN 1937. THIS LAST
HAPPENED IN APRIL IN 2008.

.AVIATION...FOR MCCARRAN...NORTH WINDS HAVE TRIED TO MAKE A PUSH
INTO THE AIRPORT BUT DO NOT LOOK LIKE THEY WILL BE STRONG ENOUGH TO
PREVAIL THE ENTIRE TIME THIS MORNING. AS A RESULT...WINDS WILL BE
NORTH BUT MAY PERIODICALLY SHIFT TO THE SOUTH. SPEEDS WILL BE 5 KTS
OR LESS FROM THE NORTH...BUT COULD BE AS HIGH AS 8 KTS OR SO WHEN
WINDS BLOW FROM THE SOUTH. WINDS MAY FAVOR A MORE NORTHEAST
DIRECTION AT TIMES LATER THIS MORNING. BETWEEN 21Z AND 23Z FRIDAY
SOUTH-SOUTHWEST WINDS AT 7-12 KTS SHOULD DEVELOP. CLOUDS SHOULD
BECOME MORE SCT-BKN BY THIS AFTERNOON WITH BASES MAINLY AOA 20K FEET
- HOWEVER A FEW CLOUDS AS LOW AS 14K FEET ARE EXPECTED.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...WINDS ARE EXPECTED TO BECOME SOUTHWEST TO SOUTH BETWEEN
17Z AND 19Z OVER THE REMAINDER OF THE AREA WITH GUSTS AS HIGH AS
20-25 KTS IN THE AFTERNOON MAINLY AT KDAG AND KDRA. KBIH SHOULD SEE
NORTH WINDS RETURN AROUND 03Z SATURDAY HOWEVER OUTSIDE OF THE
SOUTHERN GREAT BASIN MOST OF THE MOJAVE DESERT SHOULD REMAIN
SOUTHWEST TO SOUTH TONIGHT AT 6-12 KTS. INCREASING CLOUDS AOA 15K
FEET IN THE LATE MORNING AND AFTERNOON TODAY WITH MAINLY SCT-BKN
CLOUDS TONIGHT.
&&

.VEF WATCHES/WARNINGS/ADVISORIES...
NV...NONE.
AZ...NONE.
CA...NONE.
&&

MORGAN/HARRISON/STACHELSKI

HTTP://WEATHER.GOV/LASVEGAS

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAS VEGAS NV
630 AM PDT FRI APR 22 2011

AZZ001>003-036-CAZ519>527-NVZ014>022-230700-
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-
630 AM PDT FRI APR 22 2011 /630 AM MST FRI APR 22 2011/

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

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

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