Flash Flood Warning 26, NWS Las Vegas, NV

000
WGUS75 KVEF 170153
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
653 PM PDT WED JUL 16 2008

CAC071-170300-
/O.CON.KVEF.FF.W.0026.000000T0000Z-080717T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
653 PM PDT WED JUL 16 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM PDT FOR WEST
CENTRAL SAN BERNARDINO COUNTY...

AT 643 PM PDT...THE THUNDERSTORM THAT PRODUCED VERY HEAVY RAIN NORTH 
OF HELENDALE HAS WEAKENED. RADAR ESTIMATED IN EXCESS OF TWO INCHES 
OF RAIN HAD FALLEN NEAR THE HELENDALE AIRPORT. THE HEAVY RAIN FROM 
THIS STORM REMAINED BETWEEN HELENDALE AND HINKLEY ROADS. RUNOFF FROM 
THIS STORM WILL CONTINUE IN NORMALLY DRY WASHES AND WILL IMPACT 
ROADS IN THE AREA.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER
THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH
TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE
THE SMART CHOICE...TURN AROUND...DONT DROWN.

LAT...LON 3480 11728 3480 11736 3481 11738 3494 11737
      3492 11717 3480 11716 3479 11727

$$

PIERCE

000
WGUS75 KVEF 170254
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
754 PM PDT WED JUL 16 2008

CAC071-170301-
/O.EXP.KVEF.FF.W.0026.000000T0000Z-080717T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
754 PM PDT WED JUL 16 2008

...THE FLASH FLOOD WARNING WILL EXPIRE AT 800 PM PDT FOR WEST 
CENTRAL SAN BERNARDINO COUNTY...

HEAVY RAIN HAS NOT BEEN INDICATED ON RADAR NEAR THE HELENDALE 
AIRPORT...OR BETWEEN HELENDALE AND HINKLEY ROADS DURING THE PAST 
HOUR. THE FLASH FLOOD WARNING WILL EXPIRE AT 8 PM PDT.

LAT...LON 3480 11728 3480 11736 3481 11738 3494 11737
      3492 11717 3480 11716 3479 11727

$$

PIERCE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
330 PM PDT WED JUL 16 2008

.SYNOPSIS...AN UPPER LEVEL LOW PRESSURE SYSTEM WHICH HAS BEEN OVER
THE AREA WILL FINALL MOVE EAST OF THE AREA BY LATE THURSDAY. MOIST
AND UNSTABLE CONDITIONS WILL CONTINUE TO PRODUCE ISOLATED TO
SCATTERED THUNDERSTORMS OVER THE AREA THROUGH THIS EVENING BEFORE A
SLOW DRYING TAKES PLACE INTO THE WEEKEND.
&&

.SHORT TERM...UPPER LOW APPEARS TO BE OVER SOUTHWEST LINCOLN AND
NORTHWEST CLARK COUNTIES THIS AFTERNOON LOOKING AT VISIBLE SATELLITE
LOOP. THIS FEATURE CONTINUES TO COMBINE WITH A MOIST AND UNSTABLE
AIR MASS TO PRODUCE THUNDERSTORMS WITH LOCALLY HEAVY RAIN. THIS IS
EXPECTED TO CONTINUE THROUGH THIS EVENING. A DOWNWARD TREND OF
THUNDERSTORM ACTIVITY WILL BEGIN THURSDAY AS THE UPPER LOW FINALLY
MOVES EAST. MOISTURE AND INSTABILITY WILL GRADUALLY DECREASE
THURSDAY THROUGH FRIDAY. A GOOD PORTION OF THE FORECAST AREA COULD
STILL SEE ISOLATED TO SCATTERED THUNDERSTORMS THURSDAY BUT ANY
STORMS SHOULD BE LIMITED TO MOHAVE COUNTY AND FAR EASTERN LINCOLN
COUNTY FRIDAY. TEMPERATURES WILL RISE TO ABOVE NORMAL LEVELS BY
FRIDAY AS THE DRIER AIR MOVES IN.

.LONG TERM...THERE IS SOME INDICATION IN MODEL FORECASTS THAT A
RETURN OF MOISTURE COULD HAPPEN LATE IN THE WEEKEND OR EARLY NEXT
WEEK. THE MAIN FEATURES THAT WILL DETERMINE IF THIS HAPPENS IS HIGH
PRESSURE EAST OF THE AREA AND LOW PRESSURE WEST. IN ADDITION...THE
ECMWF IS FORECASTING A DISTURBANCE MOVING WESTWARD TROUGH NORTHERN
MEXICO WHICH COULD PROVIDE A MOISTURE SOURCE. LATE IN THE EXTENDED
PERIOD THE EC ALSO FORECASTS A TROPICAL SYSTEM MOVING THROUGH THE
EASTERN PACIFIC AND POTENTIALLY CONTRIBUTING TO THE AMOUNT OF
MOISTURE. THIS FORECAST PACKAGE CALLS FOR A HOT AND MAINLY DRY DAY
SATURDAY FOLLOWED BY A RETURN OF THUNDERSTORMS TO THE EASTERN CWA BY
SUNDAY AND MONDAY. THE INCREASING MOISTURE SHOULD LOWER TEMPERATURES
AFTER SATURDAY BUT THEY WILL BE HIGHLY DEPENDENT ON AMOUNT OF CLOUD
COVER AND SHOWER ACTIVITY.
&&

.AVIATION...FOR MCCARRAN...MOSTLY CLOUDY CONDITIONS TO CONTINUE OVER
CLARK COUNTY THROUGH THE REST OF THE AFTERNOON AND INTO THE EVENING.
ISOLATED TO SCATTERED THUNDERSTORMS EXPECTED IN AND AROUND THE LAS
VEGAS VALLEY THROUGH EARLY EVENING WITH HEAVY RAIN AND GUSTY WINDS
THE PRIMARY THREAT. STORMS WILL ALSO CONTINUE TO IMPACT ALL APPROACH
CORRIDORS BEFORE DISSIPATING THROUGH THE EVENING. SURFACE WINDS WILL
BE VARIABLE BASED ON THUNDERSTORM OUTFLOW BUT OVERALL SHOULD REMAIN
LIGHT.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...PARTLY TO MOSTLY CLOUDY SKIES ACROSS THE FORECAST AREA
THIS AFTERNOON WILL CONTINUE INTO THE EVENING. ISOLATED TO SCATTERED
THUNDERSTORMS TO CONTINUE ACROSS MUCH OF THE REGION WITH HEAVY RAIN
AND GUSTY WINDS BEING THE PRIMARY THREAT. OVERALL...SURFACE WINDS
ARE EXPECTED TO BE GENERALLY LIGHT.
&&

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

HARRISON/SALMEN

HTTP://WEATHER.GOV/LASVEGAS

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAS VEGAS NV
649 AM PDT WED JUL 16 2008

AZZ001>003-036-CAZ519>527-NVZ014>022-170500-
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-
649 AM PDT WED JUL 16 2008 /649 AM MST WED JUL 16 2008/

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

.DAY ONE...TODAY AND TONIGHT

A MOIST AND UNSTABLE AIR MASS WILL REMAIN OVER THE AREA TODAY FOR
SCATTERED...MAINLY AFTERNOON AND EVENING THUNDERSTORMS WITH LOCAL
GUSTY WINDS. POSSIBLE BRIEF HEAVY RAIN MAY PRODUCE ISOLATED FLASH
FLOODING OR URBAN FLOODING. THE BEST CHANCE OF THUNDERSTORMS WILL
BE OVER NORTHERN MOHAVE COUNTY...CLARK AND LINCOLN COUNTIES AND
SOUTHEAST INYO COUNTY. HOWEVER ISOLATED ACTIVITY POSSIBLE ACROSS
ALL AREAS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

DRIER AIR WILL BEGIN TO MOVE OVER THE AREA BY THURSDAY AND THEN
INTO THE END OF THE WEEK. HOWEVER ISOLATED THUNDERSTORMS WILL
CONTINUE ACROSS THE MAINLY THE EASTERN PORTION OF THE DISTRICT ON
THURSDAY AND THEN CONFINED MAINLY TO NORTHWEST ARIZONA FRIDAY INTO
TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY. SPOTTERS ARE ALWAYS
ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER AS SOON AS IT IS
SAFE TO DO SO.