Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 47, NWS Las Vegas, NV

July 9, 2011Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Jul 9, 2011, 4:07 PM MST for Mohave County, Arizona. It was in force for 113 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 9, 2011, 4:07 PM MST (23:07 UTC)
Expired
Jul 9, 2011, 6:00 PM MST
In force
113 min
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Flood severity
None

County Mohave County, AZ

The radar

The Las Vegas radar (KESX), 130 km from the middle of the area, began a volume at 23:07 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 11.1 hours before the alert went out and 157 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Flgstf/Belemont, AZ at 12:00Z on 2011-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 293 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 12:00Z on 2011-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
293 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
1247 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
-4 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

455 
WGUS55 KVEF 092307
FFWVEF
AZC015-100100-
/O.NEW.KVEF.FF.W.0047.110709T2307Z-110710T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
407 PM MST SAT JUL 9 2011

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA...

* UNTIL 600 PM MST.

* AT 403 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM 9 MILES SOUTH OF DIAMOND CREEK
  CAMPGROUND...OR 45 MILES NORTHEAST OF KINGMAN. THE STORM PRODUCING
  FLASH FLOODING WAS NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...PEACH SPRINGS AND DIAMOND CREEK   
  CAMPGROUND AND THE ROAD BETWEEN THOSE TWO LOCATIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!

REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS.

&&

LAT...LON 3577 11353 3576 11341 3578 11333 3552 11334
      3550 11354

$$

JH
2 follow-up statements
147 
WGUS75 KVEF 100011
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
511 PM MST SAT JUL 9 2011

AZC015-100100-
/O.CON.KVEF.FF.W.0047.000000T0000Z-110710T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
511 PM MST SAT JUL 9 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM MST FOR
CENTRAL MOHAVE COUNTY...

AT 505 PM MST...RADAR INDICATED THAT THUNDERSTORMS HAD MOVED OUT OF 
THE WARNING AREA. HOWEVER...RUNOFF FROM THE HEAVY RAIN EARLIER COULD 
STILL PRODUCING FLASH FLOODING. 

LOCATIONS IMPACTED INCLUDE...PEACH SPRINGS AND DIAMOND CREEK 
CAMPGROUND AND THE ROAD BETWEEN THE TWO LOCATIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON
AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE
RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED
ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN!

REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL
WEATHER SERVICE FACEBOOK PAGE OR TWITTER #NWSVEGAS.

&&

LAT...LON 3577 11353 3576 11341 3578 11333 3552 11334
      3550 11354

$$

JH
108 
WGUS75 KVEF 100111
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
611 PM MST SAT JUL 9 2011

AZC015-100120-
/O.EXP.KVEF.FF.W.0047.000000T0000Z-110710T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
611 PM MST SAT JUL 9 2011

...THE FLASH FLOOD WARNING HAS EXPIRED FOR CENTRAL MOHAVE COUNTY...

NO RAIN HAS FALLEN IN THE WARNING AREA FOR QUITE SOME TIME AND THE 
THREAT OF ANY ADDITIONAL FLOODING HAS ENDED.

LAT...LON 3577 11353 3576 11341 3578 11333 3552 11334
      3550 11354

$$

JH

The office that day

Everything else NWS Las Vegas, NV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 9, 1:28 PM MSTAreal Flood AdvisoryVEFMohave3 hr
Jul 9, 3:01 PM MSTSevere Thunderstorm WarningVEFMohave44 min
Jul 9, 4:46 PM MSTFlash Flood WarningVEFMohave119 min
Jul 9, 4:57 PM MSTFlash Flood WarningVEFMohave98 min

Nearby

Flash Flood Warnings in Arizona, 2011Every flash flood warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.