Severe Thunderstorm Warning 4, NWS Las Vegas, NV

000 
WWUS55 KVEF 030030
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
530 PM MST THU JUL 2 2009

AZC015-030045-
/O.CON.KVEF.SV.W.0004.000000T0000Z-090703T0045Z/
MOHAVE AZ-
530 PM MST THU JUL 2 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM MST
FOR CENTRAL MOHAVE COUNTY...

AT 526 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED OVER CENTRAL MOHAVE COUNTY...OR 14 MILES SOUTHEAST OF
KINGMAN...MOVING NORTH AT 15 MPH.

THE SEVERE THUNDERSTORM WILL AFFECT INTERSTATE 40 BETWEEN MILE 
MARKERS 60 AND 70 BY 545 PM.

LAT...LON 3526 11388 3520 11363 3504 11373 3508 11395
TIME...MOT...LOC 0029Z 200DEG 14KT 3514 11380

$$

MORGAN

000 
WWUS55 KVEF 030045
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
545 PM MST THU JUL 2 2009

AZC015-030055-
/O.EXP.KVEF.SV.W.0004.000000T0000Z-090703T0045Z/
MOHAVE AZ-
545 PM MST THU JUL 2 2009

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MOHAVE COUNTY HAS
EXPIRED...

AT 544 PM MST...RADAR INDICATED THAT THE THUNDERSTORM OVER 
INTERSTATE 40 JUST NORTH OF THE HUALAPAI MOUNTAINS HAD BEGUN TO 
WEAKEN. THEREFORE...THE SEVERE THUNDERSTORM WARNING WAS ALLOWED TO 
EXPIRE.

LAT...LON 3526 11388 3520 11363 3504 11373 3508 11395
TIME...MOT...LOC 0045Z 200DEG 14KT 3520 11377

$$

MORGAN

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE LAS VEGAS NV
436 PM PDT THU JUL 2 2009

UPDATED AVIATION SECTION TO MENTION REMOVAL OF TS IN VEGAS VALLEY.

.SYNOPSIS...A MOIST FLOW COMBINED WITH A SERIES OF UPPER LEVEL
DISTURBANCES WILL BRING SCATTERED SHOWERS AND THUNDERSTORMS TO PARTS
OF THE AREA THIS EVENING. SLIGHTLY DRIER AIR WILL BEGIN TO WORK INTO
THE AREA ON FRIDAY AND THIS WILL RESULT IN LESS IN THE WAY OF
THUNDERSTORMS. FURTHER DRYING WILL TAKE PLACE ON SATURDAY WITH THE
BEST CHANCES FOR THUNDERSTORMS THEN OVER MOHAVE AND LINCOLN
COUNTIES. DRY CONDITIONS ARE EXPECTED FROM SUNDAY THROUGH TUESDAY
THOUGH INCREASING SOUTHWEST WINDS ARE EXPECTED EACH DAY IN THE
AFTERNOON HOURS.
&&

.AVIATION...FOR MCCARRAN...THUNDERSTORMS HAVE MOVED NORTH AND SOUTH
OF THE VALLEY AND ARE NO LONGER EXPECTED AT THE AIRPORT. 00Z TAF
WILL REFLECT SCATTERING CLOUDS AND NO WEATHER.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...SCATTERED THUNDERSTORMS ARE EXPECTED THROUGH THE REST
OF THE AFTERNOON AND INTO THE EVENING HOURS. THEY WILL BE CAPABLE OF
PRODUCING WIND GUSTS UP TO 40 KTS AND VERY HEAVY RAIN IN A SHORT
PERIOD OF TIME CREATING REDUCED VISIBILITIES. CLOUD BASES WILL
GENERALLY BE AOA 8KFT. WINDS SHOULD REMAIN BELOW 12KTS AWAY FROM
THUNDERSTORMS.
&&

.PREVIOUS DISCUSSION...400 PM PDT...

.SHORT TERM...IT HAS BEEN A BUSY AFTERNOON ACROSS THE AREA WITH
SHOWERS AND THUNDERSTORMS AFFECTING PARTS OF THE MOJAVE DESERT AND
SOUTHERN GREAT BASIN. THE ACTIVITY WE HAVE BEEN SEEING THIS
AFTERNOON HAS DEVELOPED LARGELY ALONG A MOISTURE BOUNDARY LOCATED
NEAR THE CALIFORNIA-NEVADA BORDER SEPARATING DRY AIR TO THE WEST
FROM WHAT IS A SURGE OF MONSOONAL MOISTURE TO THE EAST. THIS
BOUNDARY HAS BASICALLY MARKED THE WESTERN EDGE OF CONVECTION AND TO
THE WEST OF IT LITTLE IF ANY ACTIVITY IS EXPECTED THIS EVENING AND
THUS LOWERED POPS DOWN ESPECIALLY WEST OF BARSTOW. FURTHER EAST A
SERIES OF UPPER LEVEL DISTURBANCES...ONE NOW OVER SOUTHEAST-CENTRAL
NEVADA  AND A SECOND ACROSS NORTHWEST NEVADA COMBINED WITH A PUSH OF
MOISTURE HAS RESULTED IN SCATTERED SHOWERS AND THUNDERSTORMS
DEVELOPING. THE MAIN HAZARD WITH STORMS THIS EVENING WILL BE LOCALLY
HEAVY DOWNPOURS DUE TO THE HIGH MOISTURE CONTENT OF THE AIR EAST OF
THE AFOREMENTIONED MOISTURE BOUNDARY. IN THIS AREA PWATS OF 0.75
INCHES TO 1.5 INCHES ARE CURRENTLY IN PLACE AND THIS WILL ALLOW FOR
THE HEAVIEST STORMS TO UNLOAD RAINFALL AMOUNTS IN EXCESS OF 0.5 TO 1
INCH OF RAIN IN LESS THAN AN HOUR. THE DRY LOW-LEVELS IN PLACE WILL
ALSO AID IN ALLOWING FOR GUSTY WINDS WITH THE STRONGEST STORMS.
ADDITIONALLY A FEW STRONGER STORMS WILL ALSO HAVE THE POTENTIAL FOR
HAIL. RADAR HAS BEEN SHOWING SOME RATHER HIGH VIL VALUES OF 40 OR
GREATER THIS AFTERNOON...BUT MDCRS SOUNDINGS FROM LAS VEGAS HAVE
INDICATED THE FREEZING LEVEL IS AROUND 15000 FEET. THUS SOME HAIL
MAY MAKE IT TO THE SURFACE...BUT IN REALITY MUCH OF THE HAIL WILL
MELT BEFORE REACHING THE GROUND AND THUS FALL AS HEAVY RAIN...AND
THIS WILL INCREASE THE POTENTIAL OF HEAVY DOWNPOURS TAKING PLACE. AS
THE DISTURBANCES MOVE NORTHEAST AROUND THE UPPER RIDGE THIS EVENING
AND WE LOOSE HEATING CONVECTION WILL BEGIN TO WIND DOWN. CLOUDS WILL
CLEAR OUT OF SOMEWHAT TONIGHT BUT WITH A SOUTHERLY FLOW IN PLACE
HUMIDITY VALUES WILL NOT LOWER MUCH OVER LAST NIGHT.

FOR TOMORROW THE FLOW ALOFT GOES MORE SOUTHWESTERLY AND THIS WILL
BRING DRIER AIR INTO THE AREA WHICH WILL BE MOST PRONOUNCED IN THE
WEST. PWATS LOWER BY A GOOD HALF AN INCH AREAWIDE AND THIS SHOULD
HELP TO ELIMINATE THE POTENTIAL FOR CONVECTION IN MOST OF THE
WESTERN CWFA. FURTHER EAST ENOUGH MOISTURE HANGS ON AND A FEW WEAK
RIPPLES EXIST IN THE 500 MB FLOW...BUT WITH LESS MOISTURE AROUND THE
THOUGHT IS THAT THERE SHOULD BE LESS IN THE WAY OF CONVECTION IN THE
AFTERNOON. THE BEST MOISTURE FLUX AND INSTABILITY SUPPORTS THE BEST
POPS EAST OF LAS VEGAS. TEMPS WILL WARM A FEW DEGREES IN MOST AREAS.

IT LOOKS LIKE WE GET EVEN MORE DRYING FOR SATURDAY AS THE FLOW TURNS
EVEN MORE TO THE WEST. PWATS FALL BELOW AN INCH ACROSS MOST OF THE
AREA. SUSPECT JUST ENOUGH MOISTURE STILL EXIST OVER MOHAVE COUNTY
AND LINCOLN COUNTY TO POP A FEW THUNDERSTORMS IN THE AFTERNOON.
TEMPS WILL BEGIN TO WARM A FEW DEGREES AS WE DRY OUT AND THUS EXPECT
NEAR SEASONAL HIGH TEMPS FOR THE FOURTH.

.LONG TERM...A BROAD UPPER LOW OFF THE PAC NW COAST WILL ESSENTIALLY
BRING IN ENOUGH WESTERLY FLOW TO ESSENTIALLY ELIMINATE THE CHANCES
FOR CONVECTION AREAWIDE FROM SATURDAY NIGHT THROUGH THURSDAY.
INITIALLY TEMPS WILL WARM ON SUNDAY AND MONDAY AS SOME SHORT WAVE
RIDGING DEVELOPS OVER THE FOUR CORNERS REGION. 700 MB TEMPS RISE TO
+14C TO +16C ACROSS THE AREA...SUPPORTING TEMPS A FEW DEGREES ABOVE
NORMAL. THEN AS THE BROAD LOW OFFSHORE APPROACHES TEMPS WILL DROP TO
OR BELOW NORMAL BY WEDNESDAY AS HEIGHTS FALL. STARTING SUNDAY
AFTERNOON AND CONTINUING THROUGH THURSDAY SOUTHWEST WINDS WILL
INCREASE EACH AFTERNOON AND THEN WEAKEN AT NIGHT DUE TO THE
APPROACHING TROUGH AXIS OFFSHORE. WE COULD SEE SOME SUSTAINED WINDS
OF 15-25 MPH EASILY AS EARLY AS TUESDAY.
&&

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

SALMEN:AVIATION UPDATE
STACHELSKI/SALMEN

HTTP://WEATHER.GOV/LASVEGAS

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAS VEGAS NV
319 PM PDT THU JUL 2 2009

AZZ001>003-036-CAZ519>527-NVZ014>022-031330-
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-
319 PM PDT THU JUL 2 2009 /319 PM MST THU JUL 2 2009/

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW THROUGH
TONIGHT. SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED THROUGH
THIS EVENING AND ARE EXPECTED TO DECREASE IN COVERAGE OVERNIGHT.
GUSTY WINDS IN EXCESS OF 40 MPH...HAIL AND LOCALLY HEAVY RAINFALL
WILL BE THE PRIMARY HAZARDS WITH STORMS THROUGH THIS EVENING. IN
AREAS THAT SEE LOCALLY HEAVY RAIN...PONDING OF WATER IS POSSIBLE
IN POOR DRAINAGE AREAS. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO
MOVE NORTH TO NORTHEAST AT 10 TO 15 MPH ACROSS THE AREA.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW THROUGH
SATURDAY EVENING. SHOWERS AND THUNDERSTORMS ARE STILL EXPECTED TO
BE AROUND FRIDAY ACROSS THE AREA BUT THE COVERAGE OF STORMS IS
EXPECTED TO BE LESS THAN TODAY. ON SATURDAY...THE COVERAGE OF
SHOWERS AND THUNDERSTORMS WILL DECREASE EVEN FURTHER AND MAINLY BE
CONFINED TO LINCOLN AND MOHAVE COUNTIES. GUSTY WINDS WILL BE THE
PRIMARY HAZARD IF ANY STRONGER STORMS DEVELOP ON THESE DAYS.

NO HAZARDOUS WEATHER IS EXPECTED FROM SATURDAY NIGHT THROUGH
WEDNESDAY AT THIS TIME. DRIER AIR WORKING INTO THE AREA WILL END
THE CHANCES FOR THUNDERSTORMS DURING THIS TIME FRAME.

.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.

STACHELSKI

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1149 AM PDT THU JUL 02 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1140 AM     HEAVY RAIN       HUALAPAI MOUNTAIN       35.10N 113.89W
07/02/2009  M1.22 INCH       MOHAVE             AZ   MESONET

            THE HUALAPI MOUNTAIN ALERT GAUGE MEASURED 1.22 INCHES OF
            RAIN IN LESS THAN AN HOUR FROM A THUNDERSTORM.

&&

STACHELSKI

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
505 PM PDT THU JUL 02 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0335 PM     FLASH FLOOD      10 SSW SEARCHLIGHT (SSW 35.28N 115.12W
07/02/2009                   SAN BERNARDINO     CA   PARK/FOREST SRVC

            THE PARK SERVICE REPORTED THAT SEVERAL PEOPLE WERE
            STRANDED IN VEHICLES IN THE CASTLE MOUNTAIN AREA OF THE
            MOJAVE NATIONAL PRESERVE ABOUT 10 MILES UP HART MINE ROAD
            DUE TO FLOODWATERS. THE FLOODWATERS WERE ESTIMATED TO BE
            UP TO 2 FEET DEEP AND WERE FLOWING SLOWLY.

&&

STACHELSKI