Severe Thunderstorm Warning 12, NWS Las Vegas, NV

000 
WWUS55 KVEF 290030
SVSVEF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
529 PM PDT SAT JUL 28 2007

AZC015-290039-
/O.CAN.KVEF.SV.W.0012.000000T0000Z-070729T0045Z/
MOHAVE AZ-
529 PM MST SAT JUL 28 2007

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MOHAVE COUNTY IS
CANCELLED...

THE SEVERE THUNDERSTORM THAT WAS NEAR PIPE SPRINGS NATIONAL MONUMENT 
HAS WEAKENED. THERE IS NO LONGER A THREAT FOR LARGE HAIL. 

LAT...LON 3699 11259 3703 11281 3679 11292 3673 112

$$

PIERCE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
138 PM PDT SAT JUL 28 2007

.SYNOPSIS...THE MOIST AND UNSTABLE AIRMASS WILL CONTINUE ACROSS
THE SOUTHERN GREAT BASIN AND MOJAVE DESERT FOR THE NEXT SEVERAL
DAYS.

&&

.SHORT TERM...TONIGHT THROUGH SUNDAY NIGHT.
THE UPPER LEVEL HIGH THAT IS CENTERED OVER SOUTHERN NEVADA WILL
BEGIN TO MOVE NORTHEAST TONIGHT THROUGH SUNDAY NIGHT. THIS WILL
CONTINUE TO ALLOW MONSOON MOISTURE FROM THE SOUTHEAST TO CONTINUE
ACROSS THE FORECAST AREA. SEVERAL LOCATIONS ACROSS MOHAVE
COUNTY...EASTERN CLARK COUNTY...AND SOUTHEAST SAN BERNARDINO
COUNTY HAVE RECEIVED RAIN THE LAST SEVERAL DAYS AND IT APPEARS
THIS TREND WILL CONTINUE THROUGH THE WEEKEND.

MADE VERY LITTLE CHANCES TO THE CURRENT GRIDS THROUGH SUNDAY
NIGHT.

.LONG TERM...MADE FEW CHANGES TO THE FORECAST MONDAY MORNING
THROUGH WEDNESDAY MORNING...AND NO CHANGES BEYOND THAT. BUMPED
POPS UP ANOTHER NOTCH IN MOHAVE COUNTY FOR MONDAY AFTERNOON AND
EVENING AS THE HIGH BEGINS TO MOVE AWAY AND SOUTHEAST FLOW
RETURNS...AND TWEAKED TEMPERATURES A LITTLE.

&&

.AVIATION...FOR MCCARRAN...THERE IS AN INTERESTING SETUP THIS
EVENING. IF...AND THIS IS A BIG IF...THUNDERSTORMS WERE TO DEVELOP
AND ORGANIZE OVER LINCOLN COUNTY...THE OVERALL FLOW PATTERN IS
FAVORABLE FOR THE ORGANIZED STORM COMPLEX /OR AT LEAST AN OUTFLOW
BOUNDARY/ TO MOVE THROUGH THE LAS VEGAS VALLEY FROM THE NORTH. IF
THIS WERE TO OCCUR...THERE WOULD BE A PERIOD OF STRONG NORTHEAST
WINDS AT MCCARRAN...POSSIBLY ACCOMPANIED BY THUNDER AND/OR RAIN. THE
MOST LIKELY TIME OF OCCURRENCE WOULD BE BETWEEN 03Z AND 06Z...AND
THE PROBABILITY OF OCCURRENCE IS ABOUT 20-30 PERCENT. IF THIS DOES
NOT OCCUR...WINDS ARE EXPECTED TO BE LIGHT THROUGH THE AFTERNOON
BEFORE SWITCHING TO THE SOUTH OR SOUTHWEST AT 10 KNOTS OR LESS
AROUND SUNSET. THERE WILL BE THUNDERSTORMS THROUGH THE AFTERNOON AND
EVENING OVER THE SPRING MOUNTAINS...WHICH COULD IMPACT DEPARTURES
FROM RUNWAY 25. THERE WILL ALSO BE SCATTERED STORMS IN THE MORMON
MESA AND PEACH SPRINGS CORRIDORS...AND A FEW STORMS IN THE DAGGETT
CORRIDOR CANNOT BE RULED OUT. EXPECT SCATTERED STORMS IN ABOUT THE
SAME AREAS AGAIN TOMORROW...WITH SOME INCREASE IN COVERAGE ON
MONDAY...ESPECIALLY IN THE MORMON MESA AND PEACH SPRINGS CORRIDORS.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...ISOLATED TO SCATTERED THUNDERSTORMS CAN BE EXPECTED IN
THE AFTERNOONS AND EVENINGS TODAY AND SUNDAY...WITH SOME INCREASE IN
COVERAGE EXPECTED ON MONDAY. OUTSIDE OF STORMS...WINDS WILL
GENERALLY BE 15 KNOTS OR LESS.

&&

.HYDROLOGY...SEVERAL LOCATIONS ACROSS THE EASTERN PART OF THE
FORECAST AREA...ESPECIALLY MOHAVE COUNTY...EXTREME EASTERN CLARK
COUNTY...AND SOUTHEAST SAN BERNARDINO COUNTY HAVE HAD SEVERAL DAYS
OF THUNDERSTORMS...AND THIS TREND WILL CONTINUE THROUGH AT LEAST
MONDAY.  WITH THE SLOW MOVEMENT OF THE STORMS...HEAVY RAINS WILL
CONTINUE TO BE ASSOCIATED WITH THE THUNDERSTORMS AND EXPECT FLASH
FLOODING FOR NORMALLY PRONE AREAS. HAVE RECEIVED REPORTS THAT
SOME LOCATIONS DOWNSTREAM FROM YESTERDAY/S HEAVY RAINS ARE STILL
EXPERIENCING WATER RUNNING THROUGH WASHES AND LOW WATER CROSSING
BEING CLOSED. A FLASH FLOOD WATCH WILL BE IN EFFECT FOR THE
EASTERN PART OF THE FORECAST AREA THROUGH 9 PM TONIGHT.

&&

.VEF WATCHES/WARNINGS/ADVISORIES...
NV...FLASH FLOOD WATCH UNTIL 9 PM PDT THIS EVENING FOR NVZ021.
AZ...FLASH FLOOD WATCH UNTIL 9 PM MST THIS EVENING FOR AZZ001>003-036.
CA...FLASH FLOOD WATCH UNTIL 9 PM PDT THIS EVENING FOR CAZ525>527.
&&

81/MORGAN

HTTP://WEATHER.GOV/LASVEGAS

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAS VEGAS NV
638 AM PDT SAT JUL 28 2007

AZZ001>003-036-CAZ519>527-NVZ014>022-291300-
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-
638 AM PDT SAT JUL 28 2007 /638 AM MST SAT JUL 28 2007/

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

.DAY ONE...TODAY AND TONIGHT

ISOLATED TO SCATTERED THUNDERSTORMS WILL AGAIN DEVELOP THIS
EVENING ACROSS SOUTHERN NEVADA...NORTHWEST ARIZONA AND EASTERN SAN
BERNARDINO COUNTY CALIFORNIA AS DEEP MONSOONAL MOISTURE AND
UNSTABLE AIR REMAIN IN PLACE. THE MAIN THREAT WITH THESE STORMS
WILL BE LOCALLY HEAVY RAIN AND POSSIBLE ISOLATED FLASH FLOODING
ALTHOUGH THERE WILL BE THE POTENTIAL FOR DAMAGING WINDS AND HAIL
WITH A FEW THUNDERSTORMS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

ISOLATED TO SCATTERED THUNDERSTORMS WILL PERSIST SUNDAY AND AN
INCREASING SOUTHEAST FLOW WILL BRING ADDITIONAL MONSOONAL
MOISTURE INTO THE REGION EARLY IN THE COMING WEEK LEADING TO
INCREASING THUNDERSTORM COVERAGE. ISOLATED FLASH FLOODING WILL
REMAIN THE MAIN THREAT WITH THESE THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS SHOULD REPORT SIGNIFICANT WEATHER PER STANDARD PROCEDURE.

JGA