Flash Flood Watch 3, NWS Las Vegas, NV

892 
WGUS65 KVEF 161706
FFAVEF

FLOOD WATCH
NATIONAL WEATHER SERVICE LAS VEGAS NV
1006 AM PDT MON JUL 16 2012

.SCATTERED THUNDERSTORMS WITH LOCALLY HEAVY RAIN ARE EXPECTED
AGAIN TODAY OVER AREAS NORTH AND EAST OF LAS VEGAS.

AZZ001-NVZ015-016-170500-
/O.CON.KVEF.FF.A.0003.000000T0000Z-120717T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NORTHWEST PLATEAU-LINCOLN COUNTY-NORTHEAST CLARK COUNTY-
1006 AM PDT MON JUL 16 2012 /1006 AM MST MON JUL 16 2012/

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM PDT /10 PM
MST/ THIS EVENING...

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF NORTHWEST ARIZONA AND NEVADA...INCLUDING THE 
  FOLLOWING AREAS...IN NORTHWEST ARIZONA...NORTHWEST PLATEAU. IN 
  NEVADA...LINCOLN COUNTY AND NORTHEAST CLARK COUNTY. 

* UNTIL 10 PM PDT /10 PM MST/ THIS EVENING

* MONSOON MOISTURE REMAINS IN PLACE TODAY...AND DRY AIR MOVING 
  IN FROM THE WEST WILL HELP TRIGGER THUNDERSTORMS. SOME 
  THUNDERSTORMS WILL PRODUCE LOCALLY HEAVY RAIN WHICH COULD LEAD 
  TO FLASH FLOODING. 

* WATER...MUD AND DEBRIS COULD FLOW ACROSS ROADS...ESPECIALLY IN 
  DIPS AND LOW SPOTS. UNPAVED SECONDARY ROADS COULD WASH OUT. 
  UNUSUALLY HIGH WATER COULD FLOW THROUGH STORM DRAINS AND FLOOD 
  CONTROL CHANNELS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD
TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION
AND PERSONS IN AND NEAR THE WATCH AREA SHOULD BE ALERT TO THE
POTENTIAL FOR HEAVY RAINFALL. 
&&

$$

937 
WGUS65 KVEF 170410
FFAVEF

FLOOD WATCH
NATIONAL WEATHER SERVICE LAS VEGAS NV
910 PM PDT MON JUL 16 2012

AZZ001-NVZ015-016-170515-
/O.CAN.KVEF.FF.A.0003.000000T0000Z-120717T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NORTHWEST PLATEAU-LINCOLN COUNTY-NORTHEAST CLARK COUNTY-
910 PM PDT MON JUL 16 2012 /910 PM MST MON JUL 16 2012/

...FLASH FLOOD WATCH IS CANCELLED...

THE FLASH FLOOD WATCH FOR PORTIONS OF NORTHWEST ARIZONA AND
NEVADA HAS BEEN CANCELLED. 

THUNDERSTORMS ENDED EARLY THIS EVENING OVER NORTHEAST CLARK AND
NORTHERN MOHAVE COUNTIES AND GRADUALLY DECREASED OVER LINCOLN
COUNTY. THERE MAY BE A STORM OR TWO IN FAR NORTHERN LINCOLN COUNTY
BEFORE 11 PM BUT THE THREAT OF FLASH FLOODING HAS PRETTY MUCH
ENDED. 

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
857 PM PDT SUN JUL 15 2012

.SYNOPSIS...SCATTERED THUNDERSTORMS WITH LOCALLY HEAVY RAINFALL
REMAIN A THREAT OVER THE EASTERN MOJAVE DESERT...SOUTHERN NEVADA AND
NORTHWEST ARIZONA THROUGH THIS EVENING. DRY AND STABLE AIR PUSHING
ACROSS THE SOUTHERN SIERRA AND WESTERN MOJAVE DESERT WILL BRING A
GRADUAL DRYING TREND WITH DECREASING THUNDERSTORM COVERAGE FROM WEST
TO EAST MONDAY AND MOSTLY DRY WEATHER TUESDAY THROUGH THURSDAY.
&&

.UPDATE...THUNDERSTORM ACTIVITY HAD DIMINISHED SIGNIFICANTLY AS OF
845 PM WITH ISOLATED THUNDERSTORMS AT BEST. WITH A SHORTWAVE TROUGH
TO OUR WEST AND SOME MODERATELY STRONG WINDS ALOFT AND LINGERING
INSTABILITY...SOME OF OUR EASTERN CWA COULD STILL SEE A FEW STORMS
TONIGHT. HOWEVER...I UPDATED GRIDS TO LOWER POPS TO ACCOUNT FOR
CURRENT TRENDS...ESPECIALLY IN THE WESTERN PART OF THE CWA. THE
FLASH FLOOD WATCH WAS ALLOWED TO EXPIRE AT 9 PM. IT LOOKS LIKE THE
DRIER AND MORE STABLE AIR WILL CONTINUE TO PUSH A LITTLE FARTHER
EAST MONDAY SO IT SHOULD BE A LITTLE LESS ACTIVE BUT LINCOLN AND
MOHAVE COUNTIES AND PERHAPS EASTERN CLARK COUNTY WILL STILL SEE
SCATTERED THUNDERSTORMS WITH LOCALLY HEAVY RAIN.
&&

.AVIATION...FOR MCCARRAN...THERE ARE A FEW THUNDERSTORM CELLS AROUND
THE FORECAST AREA THIS EVENING AND ONE DEVELOPING IN OR AROUND THE
VALLEY OVERNIGHT IS NOT OUT OF THE QUESTION. WINDS IN GENERAL WILL
BE SOUTH SOUTHWEST 8-10KTS TONIGHT. STORMS WILL DEVELOP AGAIN ON
MONDAY WITH THE BEST CHANCE EAST OF LAS VEGAS.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA..ISOLATED THUNDERSTORMS ARE POSSIBLE OVERNIGHT WITH CIGS
AS LOW AS 6K FEET IN HEAVIER SHOWERS. OTHERWISE...FEW-SCT CLOUDS
AROUND THE AREA WITH WINDS AWAY FROM SHRA/TSRA FAVORING TYPICAL
DIURNAL TRENDS. ANOTHER ROUND OF THUNDERSTORMS IS EXPECTED MONDAY
AFTERNOON THOUGH COVERAGE WILL GENERALLY BE CONFINED TO SOUTHEASTERN
NEVADA AND NORTHWEST ARIZONA AS DRIER AIR PUSHES IN FROM THE WEST.
&&

.PREV DISCUSSION...
400 PM PDT SUN JUL 15 2012

.SHORT TERM...TONIGHT THROUGH WEDNESDAY...THUNDERSTORMS THAT
DEVELOPED DURING THE LATE MORNING AND EARLY AFTERNOON HAVE SHOWN A
WEAKENING TREND AS OF THIS WRITING...BUT CONVECTION COULD EASILY
EXPAND DURING THE LATE AFTERNOON AND EVENING WITH DYNAMIC SUPPORT
FROM THE CENTRAL CALIFORNIA LOW STILL A FACTOR. WATER VAPOR LOOPS
SHOWED A SHORTWAVE EJECTING UP INTO SOUTHERN NEVADA THROUGH THIS
EVENING AND AN OVERHEAD CURVED JET OF 40-50 KNOTS. CONVECTION IS
EXPECTED TO DECREASE LATE THIS EVENING AND OVERNIGHT BUT ISOLATED
STORMS COULD KEEP GOING ANYWHERE EAST OF A LINE FROM BARSTOW UP
THROUGH MERCURY AND THE WESTERN LINCOLN COUNTY BORDER. MODELS
CONTINUE TO INSIST DRYING WILL DEVELOP OVER ALL OF SAN BERNARDINO
INTO WESTERN CLARK COUNTY BY MONDAY AFTERNOON BUT PAST EXPERIENCE
HAS SHOWN THEY ARE OFTEN TO QUICK TO SCOUR OUT MOISTURE WHEN IT IS
AS ENTRENCHED AS THE CURRENT SITUATION. SCATTERED THUNDERSTORMS
SHOULD PERSIST OVER MOST OF SOUTHERN NEVADA AND MOHAVE COUNTY
ARIZONA MONDAY THEN THE TROUGH ALONG THE CALIFORNIA COAST
STRENGTHENS MONDAY NIGHT AND TUESDAY AS ADDITIONAL ENERGY DROPS OUT
OF THE PACIFIC NORTHWEST. THIS SHOULD BE ENOUGH TO DEVELOP DEEP DRY
SOUTHWEST FLOW AND FINALLY PUSH MOISTURE TO THE EAST AND BRING AN
END TO THUNDERSTORMS.

.LONG TERM...THURSDAY THROUGH SUNDAY...NO SIGNIFICANT CHANGES TO
FORECAST FOR THE EXTENDED PERIOD. THE GFS AND ECMWF STILL DEPICT MID
LEVEL MOISTURE BEING STRIPPED FROM HURRICANE FABIO WILL BE PULLED
ACROSS THE SOUTHERN SIERRA THURSDAY WHICH MAY PRODUCE A SLIGHT
CHANCE OF THUNDERSTORMS OVER THE MOUNTAINS. THE TROUGH THEN LIFTS
AWAY AND HIGH PRESSURE OVER THE CENTRAL U.S. EXPANDS WESTWARD AND
THE DOOR OPENS FOR A RETURN OF MONSOONAL MOISTURE GOING INTO THE
WEEKEND.
&&

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

UPDATE...HARRISON
AVIATION...SALMEN
PREV DISCUSSION...ADAIR

HTTP://WEATHER.GOV/LASVEGAS

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAS VEGAS NV
416 AM PDT SUN JUL 15 2012

AZZ001>003-036-CAZ524-527-NVZ015-016-018>022-160700-
NORTHWEST PLATEAU-LOWER COLORADO RIVER VALLEY-NORTHWEST DESERTS-
LAKE MEAD NATIONAL RECREATION AREA-EASTERN MOJAVE DESERT-
SAN BERNARDINO COUNTY-UPPER COLORADO RIVER VALLEY-LINCOLN COUNTY-
NORTHEAST CLARK COUNTY-SHEEP RANGE-SPRING MOUNTAINS-
LAS VEGAS VALLEY-SOUTHERN CLARK COUNTY-
416 AM PDT SUN JUL 15 2012 /416 AM MST SUN JUL 15 2012/

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

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED AGAIN TODAY. A FEW STORMS MAY
PRODUCE FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

ISOLATED THUNDERSTORMS ARE EXPECTED AGAIN ON MONDAY...THEN DRY
WEATHER IS LIKELY TUESDAY THROUGH THURSDAY. THERE IS SOME CHANCE
THAT THUNDERSTORMS MAY RETURN FRIDAY OR SATURDAY.

.SPOTTER INFORMATION STATEMENT...

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

CAZ519>523-525-526-NVZ014-017-160700-
EASTERN SIERRA SLOPES-OWENS VALLEY-WHITE MOUNTAINS OF INYO COUNTY-
DEATH VALLEY NATIONAL PARK-WESTERN MOJAVE DESERT-MORONGO BASIN-
CADIZ BASIN-ESMERALDA AND CENTRAL NYE COUNTY-
WESTERN CLARK AND SOUTHERN NYE COUNTY-
416 AM PDT SUN JUL 15 2012

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

.DAY ONE...TODAY AND TONIGHT

ISOLATED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON. HAZARDOUS
WEATHER IS NOT LIKELY.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

HAZARDOUS WEATHER IS NOT EXPECTED MONDAY THROUGH WEDNESDAY. THERE
IS SOME CHANCE THAT THUNDERSTORMS MAY RETURN AS EARLY AS
THURSDAY...WITH BETTER CHANCES FRIDAY AND SATURDAY.

.SPOTTER INFORMATION STATEMENT...

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

MORGAN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1251 AM PDT MON JUL 16 2012

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

1028 PM     HEAVY RAIN       SUMMERLIN               36.21N 115.31W
07/15/2012  M0.83 INCH       CLARK              NV   MESONET

            AN AUTOMATED RAIN GAUGE FROM THE CLARK COUNTY REGIONAL
            FLOOD CONTROL DISTRICT NEAR CHARLESTON AND RAMPART
            MEASURED A STORM TOTAL OF 0.83 INCHES IN 15 MINUTES.

1030 PM     HAIL             1 NW SUMMERLIN          36.21N 115.31W
07/15/2012  E1.25 INCH       CLARK              NV   TRAINED SPOTTER

            SEVERAL SPOTTERS IN SUMMERLIN AND NORTH LAS VEGAS
            REPORTED HAIL FROM NICKEL TO SILVER DOLLAR SIZE BETWEEN
            1025 PM AND 1042 PM. SOME VEHICLES WERE DAMAGED.

1052 PM     TSTM WND GST     N NORTH LAS VEGAS       36.27N 115.14W
07/15/2012  E60.00 MPH       CLARK              NV   TRAINED SPOTTER

&&

MORGAN