Flash Flood Warning 114, NWS Las Vegas, NV

027 
WGUS75 KVEF 100047
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
547 PM PDT WED SEP 9 2015

CAC071-100230-
/O.CON.KVEF.FF.W.0114.000000T0000Z-150910T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
547 PM PDT WED SEP 9 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM PDT FOR
WEST CENTRAL SAN BERNARDINO COUNTY...

AT 541 PM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS HAD PRODUCED 
HEAVY RAIN IN EXCESS OF ONE INCH OVER THE LAST HOUR. ADDITIONAL 
RAINFALL IS EXPECTED FROM STORMS MOVING INTO THE WARNED AREA 
 
FLASH FLOODING IS LIKELY ALREADY OCCURING...AND COULD BE EXACERBATED 
BY ADDITIONAL RAINFALL.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... EL 
MIRAGE...HELENDALE...KRAMER JUNCTION...AND STATE HIGHWAY 58 THROUGH 
MILE MARKER 14
. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED ON ROADS...IN NORMALLY DRY WASHES AND LOW
LYING AREAS. NEVER TRY TO CROSS A FLOODED ROAD OR ENTER A FLOOD
CHANNEL. TURN AROUND...DONT DROWN! REPORT FLOODING TO THE LAS VEGAS
NATIONAL WEATHER SERVICE VIA FACEBOOK OR TWITTER.

&&

LAT...LON 3481 11755 3482 11763 3512 11763 3512 11742
      3480 11739

$$

STEELE

905 
WGUS75 KVEF 100222
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
722 PM PDT WED SEP 9 2015

CAC071-100231-
/O.EXP.KVEF.FF.W.0114.000000T0000Z-150910T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO CA-
722 PM PDT WED SEP 9 2015

...THE FLASH FLOOD WARNING FOR WEST CENTRAL SAN BERNARDINO COUNTY
WILL EXPIRE AT 730 PM PDT...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT.

LAT...LON 3481 11755 3482 11763 3512 11763 3512 11742
      3480 11739

$$

STEELE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
300 PM PDT WED SEP 9 2015

.SYNOPSIS...MONSOON MOISTURE WILL KEEP THUNDERSTORMS IN THE FORECAST
ACROSS THE MOJAVE DESERT SOUTH OF LAS VEGAS THROUGH THIS EVENING AND
AGAIN THURSDAY. MAINLY DRY AND HOT CONDITIONS ARE EXPECTED FRIDAY
WITH HIGH PRESSURE OVERHEAD. THE POTENTIAL EXISTS FOR REMNANT
TROPICAL MOISTURE ASSOCIATED WITH FORMER HURRICANE LINDA TO PUSH
NORTH ACROSS THE REGION AS EARLY AS SATURDAY BUT MAINLY SUNDAY
THROUGH MONDAY.
&&

.SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT.

ISOLATED TO SCATTERED THUNDERSTORMS DEVELOPED THIS AFTERNOON ACROSS
MAINLY SAN BERNARDINO AND SOUTHERN PORTIONS OF CLARK AND MOHAVE
COUNTIES. THIS ACTIVITY IS EXPECTED TO CONTINUE INTO THE EVENING BUT
SHOULD DIMINISH BY LATE EVENING. THERE IS POTENTIAL FOR SOME SHOWER
AND THUNDERSTORM ACTIVITY OVERNIGHT AND EARLY THURSDAY IN FAR
SOUTHERN SAN BERNARDINO AND MOHAVE COUNTIES AS THE NAM12 INDICATES
MOISTURE INCREASE THERE FROM THE EAST SOUTHEAST. IT LOOKS LIKE
THUNDERSTORM CHANCES WILL BE IN ROUGHLY THE SAME PLACES THURSDAY
AFTERNOON AS TODAY...AT LEAST BASED ON THE NAM12 INSTABILITY PROGS
WHICH DID BETTER THAN THE GFS TODAY. AREAS FROM ROUGHLY LAS VEGAS
NORTHWARD WILL BE CAPPED WITH WARM MID LEVEL TEMPERATURES DUE TO
HIGH PRESSURE STRENGTHENING OVER NEVADA. THE HIGH IS FORECAST TO
PUSH THE MONSOON MOISTURE A BIT FARTHER SOUTH AND WEST FRIDAY SO
ISOLATED THUNDERSTORMS SHOULD BE LIMITED TO MAINLY SOUTHWEST SAN
BERNARDINO COUNTY.

.LONG TERM...SATURDAY THROUGH WEDNESDAY.

FORECAST MODELS TODAY HAVE TRENDED TOWARDS BETTER AGREEMENT BUT
THERE REMAINS DIFFERENCES IN THE DETAILS. BOTH THE ECMWF AND GFS NOW
AGREE IN THAT A DEVELOPING WEAK CLOSED LOW OFF THE CALIFORNIA COAST
WILL ABSORB MUCH OF THE REMAINS OF HURRICANE LINDA AND DIRECT IT
EASTWARD INTO THE SOUTHWEST SUNDAY THROUGH TUESDAY. HOW THE UPPER
AIR PATTERN EVOLVES AFTER THE INITIAL PUSH OF LINDAS MOISTURE
ARRIVES REMAINS UNCERTAIN AS THE ECMWF DEVELOPS A SECONDARY WAVE
WHICH INTERACTS WITH THE TROPICAL MOISTURE FURTHER WHILE A TROUGH IS
CARVED OUT ACROSS THE NORTHWESTERN STATES. THE GFS DRAGS THE INITIAL
CLOSED LOW OVER CALIFORNIA SOUTHWARD AND EVENTUALLY NUDGES IT
TOWARDS NORTHERN MEXICO WHILE A PROGRESSIVE TROUGH TAKES OVER AND
POSSIBLY LEAVES SOME ENERGY BEHIND NEAR THE FOUR CORNERS.
REGARDLESS...COOLER AND WETTER CONDITIONS ARE EXPECTED TO ARRIVE
SUNDAY THROUGH TUESDAY WITH MOISTURE POSSIBLY LINGERING BEYOND THAT
PERIOD. WHICH DAYS AND TIME PERIODS WITHIN THAT RANGE ARE LIKELY TO
BE MOST ACTIVE REMAINS TO BE SEEN.

IVE TRENDED THE TEMPERATURES DOWNWARD FOR THE ENTIRE EXTENDED PERIOD
AND SLASHED SEVERAL DEGREES OFF THE HIGH TEMPERATURES FOR SUNDAY
ONWARD. I ONLY MADE MINOR TWEAKS TO THE POP GRIDS MAINLY TO BUMP UP
SOME OF THE HIGHER CONFIDENCE LOCATIONS SUCH AS MOHAVE COUNTY BUT
WITH CONSIDERABLE UNCERTAINTY IN TIMING OF THE WEATHER
FEATURES...DIDNT WANT TO RAISE POPS SUBSTANTIALLY YET. IT SHOULD BE
NOTED THAT THE CURRENT POPS ARE BELOW WHAT MOST GUIDANCE SUGGESTS SO
ONCE HIGHER CONFIDENCE IS GAINED IN TIMING THINGS WILL MOST LIKELY
BE RAISED UPWARDS.
&&

.AVIATION...FOR MCCARRAN...OUTSIDE OF ANY OUTFLOW BOUNDARIES LIGHT
WINDS GENERALLY UNDER 8 KTS ARE EXPECTED THROUGH THIS EVENING AND
THURSDAY. WINDS WILL BE GENERALLY FROM AN EASTERLY DIRECTION DURING
THE DAY AND SOUTH-SOUTHWEST OVERNIGHT. SHRA/TSRA POSSIBLE MAINLY TO
THE SOUTH OF KLAS THROUGH THIS EVENING AND AGAIN THURSDAY THOUGH A
STORM OVER THE MOUNTAINS SURROUNDING THE VALLEY CANNOT BE RULED OUT.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...SCATTERED-ISOLATED SHRA/TSRA WILL BE POSSIBLE THROUGH
THIS EVENING AND AGAIN AND THURSDAY... PRIMARILY SOUTH OF KLAS.
GUSTY AND ERRATIC WINDS ARE POSSIBLE IN AND NEAR ANY
SHRA/TSRA...OTHERWISE RELATIVELY LIGHT WINDS WILL FAVOR TYPICAL
DIURNAL TRENDS. SCT-BKN CLOUDS AOA 7K-12K FEET AS WELL SOUTH OF LAS
VEGAS. AREAS OF FU AND HZ ARE POSSIBLE IN AROUND KBIH REDUCING VSBY
AND CREATING LOCAL MOUNTAIN OBSCURATIONS.
&&

.SPOTTER INFORMATION STATEMENT...SPOTTERS ARE ENCOURAGED TO REPORT
ANY SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING
PROCEDURES.
&&

SHORT TERM/AVIATION...HARRISON
LONG TERM.............OUTLER

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
127 PM PDT WED SEP 9 2015

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

0535 PM     FLASH FLOOD      12 ESE WONDER VALLEY    34.11N 115.68W
09/08/2015                   SAN BERNARDINO     CA   LAW ENFORCEMENT

            CHP REPORTED ROCK AND DEBRIS ALL OVER THE
            ROAD. TIME OF FLOODING ESTIMATED.

&&

JS