Flash Flood Warning 40, NWS Las Vegas, NV

180 
WGUS75 KVEF 271944
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1244 PM MST SUN JUL 27 2014

AZC015-272145-
/O.CON.KVEF.FF.W.0040.000000T0000Z-140727T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
1244 PM MST SUN JUL 27 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 PM MST FOR NORTH
CENTRAL MOHAVE COUNTY...

AT 1242 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED
AREA.

LOCATIONS IMPACTED INCLUDE...MT. TRUMBULL LOOP ROAD

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
ROADS. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. 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 3651 11362 3701 11365 3701 11346 3651 11339

$$

DSB

252 
WGUS75 KVEF 272116
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
216 PM MST SUN JUL 27 2014

AZC015-272125-
/O.CAN.KVEF.FF.W.0040.000000T0000Z-140727T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
216 PM MST SUN JUL 27 2014

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTH CENTRAL
MOHAVE COUNTY...

RAIN HAS ENDED ACROSS THE WARNED AREA AND FURTHER FLOODING IS NOT 
EXPECTED AT THIS TIME.

LAT...LON 3651 11362 3701 11365 3701 11346 3651 11339

$$

DSB

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
746 AM PDT SUN JUL 27 2014

.SYNOPSIS...MONSOON MOISTURE WILL BRING A CHANCE OF THUNDERSTORMS TO
MUCH OF THE AREA THROUGH THE FIRST HALF OF THE WEEK. TEMPERATURES
WILL GENERALLY BE NEAR NORMAL.
&&

.UPDATE...MAIN CONCERN THIS MORNING IS WALL OF DUST RAISED BY
DECAYING MESOSCALE CONVECTIVE SYSTEM IN FAR SOUTHERN ARIZONA. DUST
HAS ALREADY REACHED LAKE HAVASU CITY AND NEEDLES...BUT CANNOT
MONITOR PROGRESS VIA SATELLITE DUE TO EXTENSIVE CLOUD COVER. ADDED
BLOWING DUST INTO WEATHER GRIDS OVER SOUTHERN MOHAVE...EASTERN SAN
BERNARDINO...AND EXTREME SOUTHERN CLARK COUNTIES FOR TODAY. WILL
CONTINUE TO MONITOR AND MAY NEED TO ADJUST THE AREAL COVERAGE LATER.
&&

.PREV DISCUSSION...
225 AM PDT SUN JUL 27 2014

.SHORT TERM...THROUGH TUESDAY NIGHT...
OUTFLOW BOUNDARY FROM DECAYING MCS OVER SOUTH CENTRAL ARIZONA
LEADING TO CONVECTIVE INITIATION OVER FAR SOUTHEAST MOHAVE COUNTY
EARLY THIS MORNING. EXPECT MOST OF THE ACTION TO STAY CONFINED TO
AREAS SOUTH OF I-40 AND EAST OF THE COLORADO RIVER VALLEY EARLY THIS
MORNING. THERE WILL BE PLENTY OF DEBRIS CLOUDINESS LEFT BEHIND FROM
DECAYING MCS SPREADING AS FAR NORTH AS SOUTHERN NEVADA. THE DEBRIS
CLOUDS WILL HAVE AN AFFECT ON CONVECTIVE INITIATION, EITHER
INHIBITING OR DELAYING THE ONSET UNTIL LATER IN THE DAY. LATER
SHIFTS WILL BE EYING AREAS WHICH EXPERIENCE PLENTY OF SUNSHINE OR
AREAS OF DIFFERENTLY HEATING FOR STORM DEVELOPMENT. FOR MONDAY,
DECIDED TO BUMP UP POPS SLIGHTLY HIGHER. WATER VAPOR DOES SHOW A
CYCLONIC TWIST OFF THE SRN BAJA PENINSULA. GFS HAS BEEN CONSISTENT
PAST TWO DAYS BRINGING THIS PVD ANOMALY NORTHWARD OVER THE AREA
MONDAY AFTERNOON. THIS FEATURE MAY HELP TRIGGER MORE STORMS AS
MODELS INDICATE PLENTY OF MOISTURE AND INSTABILITY STILL AROUND. FOR
TUESDAY, MODELS AGREE THERE SHOULD BE A SLIGHT DOWNWARD TREND IN
COVERAGE. TEMPERATURES IN THE COMING DAYS WILL BE VERY DEPENDENT ON
CLOUD COVER AND STORMS. OUTSIDE OF GUSTY WINDS FROM THUNDERSTORMS
WINDS WILL GENERALLY LESS THAN 10 MPH.

.LONG TERM...(WEDNESDAY THROUGH SUNDAY)...

AN UPPER LEVEL HIGH PRESSURE RIDGE WILL REMAIN ANCHORED IN PLACE
OVER THE SW US FOR MOST OF THE PERIOD. THIS WILL KEEP THE AREA
RELATIVELY MOIST AND ACTIVE WITH AFTERNOON CONVECTION FOR MOST OF
THE WEEK. ALTHOUGH MONDAY IS LIKELY TO BE THE MOST ACTIVE DAY. POPS
AND CHANCES FOR THUNDERSTORMS WILL BE SOMEWHAT LOWER THROUGH THE
WEEK AS THE SOUTHERLY FLOW IS SOMEWHAT WEAKER. AFTERNOON SHOWER AND
THUNDERSTORMS WILL BE MOST LIKELY TO OCCUR OVER MOHAVE COUNTY AND
HIGHER TERRAIN IN CLARK AND EASTERN SAN BERNARDINO COUNTY.

AN AFOREMENTIONED UPPER LEVEL TROF WILL SINK SOUTH OVER THE PACIFIC
COAST NEXT WEEKEND. THIS MAY BRING ABOUT SOME STRONGER MID-LEVEL
FORCING FOR CONVECTIVE ACTIVITY. WE WILL NEED TO SEE HOW THINGS
DEVELOP OVER THE COURSE OF THE WEEK.

.AVIATION...FOR MCCARRAN...DEBRIS CLOUDS FROM DECAYING THUNDERSTORMS
OVER ARIZONA THIS MORNING WILL SPREAD NORTHWARD OVER SOUTHERN
NEVADA. THE ADDITIONAL CLOUD MAY HELP INHIBIT OR DELAY THE ONSET OF
CONVECTION AROUND THE LAS VEGAS VALLEY TODAY. NOT CONFIDENT TO
MENTION IN 12Z TAF BUT A HI-RES MODEL SHOWS THE POTENTIAL OF AN
OUTFLOW BOUNDARY MOVING INTO THE VALLEY FROM THE EAST BETWEEN
02Z-03Z THIS EVENING. THUNDERSTORM CHANCES IN THE MORMON
MESA...PEACH SPRINGS...AND DAGGETT CORRIDORS. ANY THUNDERSTORMS
COULD PRODUCE LOCALLY HEAVY RAIN AND LOW CEILINGS ALONG WITH ERRATIC
GUSTY WINDS.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...DEBRIS CLOUDS OVER NORTHWEST ARIZONA THIS MORNING COULD
INHIBIT OR AT LEAST DELAY THE ONSET OF THUNDERSTORMS TODAY.
THUNDERSTORMS WILL PRODUCE LOCALLY HEAVY RAIN AND LOW CEILINGS ALONG
WITH ERRATIC GUSTY WINDS.

.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.
&&

MORGAN/PIERCE/LERICOS

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

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