Areal Flood Advisory 310, NWS Las Vegas, NV

139 
WGUS85 KVEF 031118
FLSVEF

FLOOD ADVISORY
NATIONAL WEATHER SERVICE LAS VEGAS NV
418 AM PDT TUE SEP 3 2013

AZC015-031200-
/O.CON.KVEF.FA.Y.0310.000000T0000Z-130903T1200Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE-
418 AM MST TUE SEP 3 2013

...THE FLOOD ADVISORY FOR RAPID RISES IN NORMALLY DRY WASHES REMAINS
IN EFFECT UNTIL 500 AM MST FOR WEST CENTRAL MOHAVE COUNTY...

AT 415 AM MST...AN ISOLATED THUNDERSTORM ACCOMPANIED BY BRIEF HEAVY 
RAIN WAS STILL OCCURRING TO THE EAST OF TEMPLE BAR MARINA. BETWEEN A 
HALF AND THREE QUARTERS OF AN INCH OF RAIN HAS FALLEN FROM TEMPLE 
BAR SOUTH TOWARD WHITE HILLS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RUNOFF FROM HEAVY RAINFALL WILL CAUSE ELEVATED WATER LEVELS IN
NORMALLY DRY WASHES...SMALL STREAMS...AND PONDING OF WATER ON AREA
ROADS. IN DESERT TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS
WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO
TRAVEL ACROSS FLOODED ROADS OR LOW WATER CROSSINGS. TURN AROUND...
DONT DROWN!

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS EVEN HARDER TO SEE WATER 
COVERING THE ROADWAY OR IN LOW WATER CROSSINGS.

REPORT FLOODED ROADS BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE...OR ON TWITTER USING...AT NWSVEGAS.

&&

LAT...LON 3578 11456 3601 11453 3606 11441 3605 11431
      3600 11426 3601 11410 3585 11412 3571 11420
      3562 11445

$$

BP

989 
WGUS85 KVEF 031157
FLSVEF

FLOOD ADVISORY
NATIONAL WEATHER SERVICE LAS VEGAS NV
457 AM PDT TUE SEP 3 2013

AZC015-031205-
/O.EXP.KVEF.FA.Y.0310.000000T0000Z-130903T1200Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE-
457 AM MST TUE SEP 3 2013

...THE FLOOD ADVISORY FOR RAPID RISES IN NORMALLY DRY WASHES WILL 
EXPIRE AT 500 AM MST FOR WEST CENTRAL MOHAVE COUNTY...

THUNDERSTORMS HAVE MOVED NORTH OF LAKE MEAD NEAR TEMPLE BAR AND WILL 
CONTINUE TO SHIFT NORTH AWAY FROM TEMPLE BAR MARINA AND WHITE HILLS. 
THE FLOOD ADVISORY WILL EXPIRE AT 5 AM MST.

LAT...LON 3578 11456 3601 11453 3606 11441 3605 11431
      3600 11426 3601 11410 3585 11412 3571 11420
      3562 11445

$$

BP

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
300 AM PDT TUE SEP 3 2013

.SYNOPSIS...MOISTURE IS EXPECTED TO REMAIN OVER MUCH OF THE REGION
LEADING TO ISOLATED THUNDERSTORMS THROUGH WEDNESDAY. A SLOW DRYING
TREND IS EXPECTED TOWARD THE END OF THE WEEK...WITH CHANCES FOR
SHOWERS AND THUNDERSTORMS GRADUALLY DECREASING. TEMPERATURES WILL BE
A FEW DEGREES ABOVE NORMAL IN MOST AREAS.
&&

.SHORT TERM...WEAK DISTURBANCE PUSHING UP THROUGH SOUTHERN NEVADA
AND NORTHWEST ARIZONA HAS ALLOWED FOR THE DEVELOPMENT AND
CONTINUATION OF SHOWERS AND THUNDERSTORMS. MAIN BATCH IS CURRENTLY
PUSHING NORTH THROUGH CLARK COUNTY AND SHOULD ALL BE INTO NORTHERN
CLARK AND LINCOLN COUNTIES BY SUNRISE. CONVECTION SHOULD BE A LITTLE
SLOWER TO DEVELOP OVER THE EASTERN HALF OF THE AREA SUCH AS
CLARK...EASTERN SAN BERNARDINO...AND MOHAVE COUNTIES DUE TO MORE
NEGATIVE VORTICITY MOVING INTO THE REGION BEHIND THIS DISTURBANCE.
STILL THINK ISOLATED THUNDERSTORMS WILL DEVELOP...BUT MORE SO IN THE
LATER AFTERNOON. OVER THE WESTERN HALF OF THE AREA...CONVECTION
SHOULD START EARLIER...BUT ITS ALSO DEPENDENT ON HOW MUCH SUN IS
AVAILABLE EARLY. WITH THIS IN MIND AND THINK STORMS WILL BE A LITTLE
MORE ISOLATED THAN YESTERDAY HAVE HELD OFF ON ANY FLASH FLOOD
WATCHES. WITH PLENTY OF MOISTURE STILL AVAILABLE ANY STORM WILL BE
CAPABLE OF PRODUCING FLASH FLOODING. NOT REALLY MUCH CHANGE GOING
INTO WEDNESDAY ALTHOUGH MOISTURE SHOULD BE ON THE DECREASE.
HOWEVER...MODELS STILL INDICATE SOME INSTABILITY AREA WIDE AND WILL
KEEP AT LEAST SLIGHT CHANCES OF STORMS ACROSS THE ENTIRE AREA.
TEMPERATURES WILL REMAIN CLOSE TO NORMAL.

.LONG TERM...THURSDAY THROUGH MONDAY...MADE LITTLE CHANGE TO THE
THU-MON PERIODS. MOISTURE PRESENTLY ACROSS THE AREA WILL CONTINUE TO
BE RECYCLED WITH A DIURNAL CYCLE IN CONVECTION THURSDAY AND FRIDAY.
KEPT THAT TREND GOING THROUGH THE WEEKEND BUT THE 00Z ECMWF THREW A
CURVE BALL INTO THAT THINKING. AN AREA OF DISORGANIZED SHOWERS AND
THUNDERSTORMS OFF THE SOUTHWEST COAST OF MEXICO HAS A GOOD CHANCE OF
DEVELOPING INTO A TROPICAL CYCLONE OVER THE COMING DAYS BASED ON THE
NATIONAL HURRICANE CENTER OUTLOOK. THE 00Z ECMWF BRINGS THIS
TROPICAL SYSTEM NORTHWARD INTO THE LOWER GULF OF CALIFORNIA FRIDAY
AND REMNANTS OF THE SYSTEM AS FAR NORTH AS THE LOWER COLORADO RIVER
VALLEY BY NEXT MONDAY. GEM/GFS DIFFER CONSIDERABLY. AGAIN...JUST
SOMETHING TO MONITOR THE NEXT FEW DAYS. IF THE ECMWF DOES PAN OUT
EXPECT ANOTHER SHOT OF TROPICAL MOISTURE INTO THE AREA WHICH WOULD
JUST REINFORCE THE MOISTURE ALREADY IN PLACE.
&&

.AVIATION...FOR MCCARRAN...ISOLATED SHOWERS AND THUNDERSTORMS
EXPECTED THROUGH SUNRISE BEFORE ENDING AND CLEARING THIS MORNING.
ISOLATED THUNDERSTORMS WILL AGAIN BE POSSIBLE LATE THIS AFTERNOON
AND EVENING AS PLENTY OF MOISTURE REMAINS IN PLACE. WINDS WILL
GENERALLY FOLLOW NORMAL DIURNAL PATTERNS...EXCEPT OUTFLOW BOUNDARIES
FROM THUNDERSTORMS COULD BRING PERIODS OF GUSTY AND SHIFTING WINDS.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...CHANCES FOR THUNDERSTORMS WILL CONTINUE AREAWIDE
THROUGH TUESDAY...THEN DECREASE FROM THE WEST BEGINNING ON
WEDNESDAY. WINDS WILL GENERALLY FOLLOW NORMAL DIURNAL
PATTERNS...EXCEPT OUTFLOW BOUNDARIES FROM THUNDERSTORMS COULD BRING
PERIODS OF GUSTY AND SHIFTING WINDS.
&&

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

GORELOW/PIERCE

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAS VEGAS NV
819 PM PDT MON SEP 2 2013

AZZ001>003-036-CAZ519>527-NVZ014>022-031830-
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-
819 PM PDT MON SEP 2 2013 /819 PM MST MON SEP 2 2013/

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

.DAY ONE...TONIGHT

A MOIST AND UNSTABLE AIR MASS WILL REMAIN IN PLACE OVERNIGHT WITH
ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS. LOCALLY HEAVY
RAINFALL IS POSSIBLE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ARE POSSIBLE THROUGH
SUNDAY AS A MOIST AND UNSTABLE AIR MASS REMAINS OVER THE AREA. HEAVY
RAINFALL AND LOCALIZED FLASH FLOODING MAY OCCUR.

.SPOTTER INFORMATION STATEMENT...

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