Flash Flood Warning 26, NWS Las Vegas, NV

590 
WGUS75 KVEF 171852
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1152 AM MST TUE AUG 17 2010

AZC015-172030-
/O.CON.KVEF.FF.W.0026.000000T0000Z-100817T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
1152 AM MST TUE AUG 17 2010

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 PM MST FOR
CENTRAL MOHAVE COUNTY...

AT 1148 AM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN OVER THE HUALAPAI 
MOUNTAIN AREA. THE THUNDERSTORM IS MOVING VERY SLOWLY TO THE 
NORTHWEST.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WILD COW 
CAMPGROUND AND HUALAPAI MOUNTAIN PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AUTOMATED RAIN GAUGES ALONG THE HUALAPAI MOUNTAIN ROAD AND NEAR 
HAYDEN PEAK HAVE RECORDED UP 2.72 INCHES OF RAINFALL SINCE 1040 AM.
ADDITIONAL RAINFALL AMOUNTS OF AN INCH OR MORE ARE POSSIBLE IN THE 
WARNED AREA.

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS.

IT IS IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO WASHES AND 
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS 
SHOULD AVOID WASHES OR CREEKS.

&&

LAT...LON 3520 11398 3514 11378 3499 11378 3499 11400

$$

JA

194 
WGUS75 KVEF 171925
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1225 PM MST TUE AUG 17 2010

AZC015-172030-
/O.CON.KVEF.FF.W.0026.000000T0000Z-100817T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
1225 PM MST TUE AUG 17 2010

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 PM MST FOR
CENTRAL MOHAVE COUNTY...

AT 1220 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THE THUNDERSTORM OVER HUALAPAI MOUNTAIN WAS DISSIPATING. EVEN THOUGH 
THE THREAT FOR ADDITIONAL HEAVY RAIN HAS DIMINISHED...RAINFALL 
AMOUNTS BETWEEN 2.2 AND 3 INCHES WERE RECORDED ALONG THE NORTHWEST 
PORTION OF HUALAPAI MOUNTAIN IN THE 90 MINUTE PERIOD FROM 1040 AM TO 
1210 PM. RUNOFF FROM THIS RAINFALL WILL FLOW TOWARD THE INTERSECTION 
OF OLD HIGHWAY 93 AND I-40. ALSO...WASHES EAST OF HAYDEN PEAK THAT 
FLOW ACROSS ODLE RANCH ROAD AND DOWN TOWARD HIGHWAY 95 WILL LIKELY 
BE FLOWING HIGH.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WILD COW
CAMPGROUND AND HUALAPAI MOUNTAIN PARK

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE 
YOU ARE RELATIVE TO WASHES AND CREEKS WHICH CAN BECOME KILLERS IN 
HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID WASHES OR CREEKS. DO 
NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS 
SAFELY.

&&

LAT...LON 3520 11398 3514 11378 3499 11378 3499 11400

$$

JA

948 
WGUS75 KVEF 171929 CCA
FFSVEF

FLASH FLOOD STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE LAS VEGAS NV
1225 PM MST TUE AUG 17 2010

AZC015-172030-
/O.COR.KVEF.FF.W.0026.000000T0000Z-100817T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
1225 PM MST TUE AUG 17 2010

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 PM MST FOR 
CENTRAL MOHAVE COUNTY...

AT 1220 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THE THUNDERSTORM OVER HUALAPAI MOUNTAIN WAS DISSIPATING. EVEN THOUGH 
THE THREAT FOR ADDITIONAL HEAVY RAIN HAS DIMINISHED...RAINFALL 
AMOUNTS BETWEEN 2.2 AND 3 INCHES WERE RECORDED ALONG THE NORTHWEST 
PORTION OF HUALAPAI MOUNTAIN IN THE 90 MINUTE PERIOD FROM 1040 AM TO 
1210 PM. RUNOFF FROM THIS RAINFALL WILL FLOW TOWARD THE INTERSECTION 
OF OLD HIGHWAY 93 AND I-40. ALSO...WASHES EAST OF HAYDEN PEAK THAT 
FLOW ACROSS ODLE RANCH ROAD AND DOWN TOWARD HIGHWAY 93 WILL LIKELY 
BE FLOWING HIGH.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WILD COW
CAMPGROUND AND HUALAPAI MOUNTAIN PARK

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE 
YOU ARE RELATIVE TO WASHES AND CREEKS WHICH CAN BECOME KILLERS IN 
HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID WASHES OR CREEKS. DO 
NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS 
SAFELY.

&&

LAT...LON 3520 11398 3514 11378 3499 11378 3499 11400

$$

JA

891 
WGUS75 KVEF 172029
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
129 PM MST TUE AUG 17 2010

AZC015-172034-
/O.EXP.KVEF.FF.W.0026.000000T0000Z-100817T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
129 PM MST TUE AUG 17 2010

...THE FLASH FLOOD WARNING WILL EXPIRE AT 130 PM MST FOR CENTRAL
MOHAVE COUNTY...

NO ADDITIONAL HEAVY RAIN HAS FALLEN OVER THE AREA FROM HUALAPAI 
MOUNTAIN ROAD TO HAYDEN PEAK SINCE 1215 PM AND RUNOFF FROM THE 
PREVIOUS HEAVY RAINFALL HAS LIKELY RECEDED. THOUGH THUNDERSTORMS 
CONTINUE TO DEVELOP FARTHER SOUTHEAST OVER THE EAST SLOPES OF THE 
HUALAPAI MOUNTAINS...RAINFALL AMOUNTS SO FAR DO NOT POSE A THREAT OF 
SERIOUS FLASH FLOODING.


LAT...LON 3520 11398 3514 11378 3499 11378 3499 11400

$$

JA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
910 AM PDT TUE AUG 17 2010

.SYNOPSIS...INCREASING MONSOON MOISTURE WILL CONTINUE TO SPREAD
NORTHWEST ACROSS THE MOJAVE DESERT TODAY AND WEDNESDAY...LEADING TO
GREATER THUNDERSTORM COVERAGE. AN AREA OF LOW PRESSURE MOVING ACROSS
THE NORTHERN GREAT BASIN WEDNESDAY NIGHT WILL THEN BRING DRY
WESTERLY FLOW AND DECREASED THUNDERSTORM CHANCES FOR THE END OF THE
WEEK.
&&

.UPDATE...SKIES HAVE CLEAR JUST ABOUT CWA WIDE THIS MORNING AS
OVERNIGHT DEBRIS CLOUDINESS DISSIPATED. PER THE PREV DISCUSSION...
INCREASED LOW LEVEL MOISTURE ACROSS THE SOUTHERN PORTION OF THE CWA
ALONG WITH INCREASE PW TO BETWEEN 1.2 AND 1.4 INCHES CONTINUES TO
POINT TO A RATHER ACTIVE DAY TODAY. MAIN CONCERN IS THE LACK OF A
STRONG FOCUSING MECHANISM...BUT GOOD DAYTIME HEATING SHOULD BE
ENOUGH TO OVERCOME THIS. WILL UPDATE FORECAST FOR LESS CLOUDS/
THUNDERSTORM CHANCES THIS MORNING...WITH NO CHANGE TO THE REMAINDER
OF THE FORECAST. UPDATES OUT SHORTLY.
&&

.PREV DISCUSSION
247 AM PDT TUE AUG 17 2010

.SHORT TERM...SATELLITE SHOWS CLEAR SKIES NORTH OF I-15 AND PARTLY
CLOUDY SKIES TO THE SOUTH. SURFACE OBS SHOW THAT MOISTURE HAS MADE
IT AS FAR AS DESERT ROCK...WHERE THE DEWPOINT JUMPED 18F BETWEEN
MIDNIGHT AND 1 AM. LITTLE CHANGE TO PREVIOUS THINKING. TODAY AND
TOMORROW SHOULD BE THE MOST ACTIVE THUNDERSTORM DAYS AS THE
AFOREMENTIONED MOISTURE IS LIFTED BY HEATING...TERRAIN...AND
INTERACTION OF OLD OUTFLOW BOUNDARIES. A JET STREAK PASSING THROUGH
THE NORTHERN GREAT BASIN WEDNESDAY AFTERNOON AND EVENING COULD HELP
INITIATE AND ORGANIZE STORMS...MAINLY OVER LINCOLN COUNTY. THIS JET
STREAK WILL BE ON THE FRONT SIDE OF A PRONOUNCED TROUGH...WHICH
SWEEPS THROUGH WEDNESDAY NIGHT AND SHOULD FLUSH THE MOISTURE OUT OF
MOST OF OUR CWFA. PRECIP CHANCES THURSDAY WILL BE SLIGHT AND LIMITED
TO EASTERN SECTIONS OF LINCOLN AND MOHAVE COUNTIES. TEMPERATURES
WILL BE SLIGHTLY ABOVE NORMAL OVERALL...WITH POINT TEMPERATURES
GREATLY AFFECTED BY LOCATION AND TIMING OF THUNDERSTORMS.

.LONG TERM...FRIDAY THROUGH MONDAY...MODELS CONTINUE WITH THE IDEA
OF A PREVAILING SOUTHWEST FLOW THROUGH THE EXTENDED PERIOD BUT THEY
ALSO FORECAST ABUNDANT MOISTURE WORKING ITS WAY BACK INTO THE
PICTURE FOR SUNDAY AND MONDAY AS THE FLOW BECOMES A LITTLE MORE
SOUTHERLY INTO THE SOUTHEASTERN PORTIONS OF THE CWA. HIGH PRESSURE
IS FORECAST TO BE EAST OF THE AREA BUT NOT IN AN IDEAL POSITION FOR
MOISTURE IMPORT. HOWEVER...AN INCOMING PACIFIC TROUGH SPORTING A 90
KT JET COULD PROVIDE SOME SUPPORT FOR STORMS TO DEVELOP ALONG A
PRONOUNCED MOISTURE GRADIENT AND POINTS EASTWARD. WILL WAIT AND SEE
HOW THE MODELS HANDLE THIS OVER THE COURSE OF THE NEXT SEVERAL RUNS
TO SEE IF ANY SIGNIFICANT CHANGES NEED TO BE MADE TO THE GRIDS.
TEMPERATURES ARE EXPECTED TO BE NEAR OR SLIGHTLY ABOVE NORMAL.

.AVIATION...FOR MCCARRAN...PREVAILING SOUTH WINDS AROUND 10 KTS WITH
GUSTS OF 20-25 KNOTS EXPECTED EACH AFTERNOON THROUGH WEDNESDAY.
ISOLATED THUNDERSTORMS ARE POSSIBLE OVER THE MOUNTAINS AROUND THE
LAS VEGAS VALLEY BOTH TUESDAY AND WEDNESDAY AFTERNOON AND THERE IS A
SLIGHT CHANCE ONE COULD MOVE NEAR THE AIRPORT. STORMS WILL MAINLY
IMPACT THE PEACH SPRINGS CORRIDOR BUT ISOLATED STORMS ARE POSSIBLE
IN THE MORMON MESA...BEATTY AND DAGGETT CORRIDORS TODAY.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...WINDS WILL MAINLY FOLLOW DIURNAL DIRECTIONAL TRENDS...
WITH THE TYPICAL AFTERNOON AND EVENING INCREASE FROM THE SOUTH TO
SOUTHWEST WITH LOCAL GUSTS OF 15-20 KTS EXPECTED THROUGH TUESDAY.
ISOLATED TO SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS THE MOJAVE
DESERT REGION TUESDAY.
&&

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

JENSEN/MORGAN/SALMEN

HTTP://WEATHER.GOV/LASVEGAS

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAS VEGAS NV
234 AM PDT TUE AUG 17 2010

AZZ001>003-036-CAZ523>527-NVZ015>022-180700-
NORTHWEST PLATEAU-LOWER COLORADO RIVER VALLEY-NORTHWEST DESERTS-
LAKE MEAD NATIONAL RECREATION AREA-WESTERN MOJAVE DESERT-
EASTERN MOJAVE DESERT-MORONGO BASIN-CADIZ BASIN-
SAN BERNARDINO COUNTY-UPPER COLORADO RIVER VALLEY-LINCOLN COUNTY-
NORTHEAST CLARK COUNTY-WESTERN CLARK AND SOUTHERN NYE COUNTY-
SHEEP RANGE-SPRING MOUNTAINS-LAS VEGAS VALLEY-
SOUTHERN CLARK COUNTY-
234 AM PDT TUE AUG 17 2010 /234 AM MST TUE AUG 17 2010/

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

.DAY ONE...TODAY AND TONIGHT

ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED TODAY AND
TONIGHT...WITH THE GREATEST CHANCES SOUTH OF INTERSTATE 15.
ISOLATED FLASH FLOODING AND SEVERE WEATHER WILL BE POSSIBLE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SCATTERED THUNDERSTORMS WITH THE POTENTIAL FOR SEVERE WEATHER AND
FLASH FLOODING ARE EXPECTED AGAIN WEDNESDAY. DRIER AIR WILL MOVE
IN THURSDAY AND FRIDAY...AND HAZARDOUS WEATHER IS NOT EXPECTED ON
THOSE DAYS. THUNDERSTORM CHANCES MAY RETURN OVER THE WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT LIKELY. SPOTTERS ARE ENCOURAGED TO
REPORT ANY SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD
OPERATING PROCEDURES.

CAZ519>522-NVZ014-180700-
EASTERN SIERRA SLOPES-OWENS VALLEY-WHITE MOUNTAINS OF INYO COUNTY-
DEATH VALLEY NATIONAL PARK-ESMERALDA AND CENTRAL NYE COUNTY-
234 AM PDT TUE AUG 17 2010

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

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

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

MORGAN