Alert archive / Arizona / Flash Flood Warnings in 2012

Flash Flood Warning 3, NWS Las Vegas, NV

July 13, 2012Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Jul 13, 2012, 2:24 PM MST for Mohave County, Arizona. It was in force for 111 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 13, 2012, 2:24 PM MST (21:24 UTC)
Expired
Jul 13, 2012, 4:15 PM MST
In force
111 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), 121 km from the middle of the area, began a volume at 21:24 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.

What was reported inside it

TimeReportWhereRemark
Jul 13, 2:55 PM MSTFLASH FLOOD4 Nnw Hualapai Mountain, AZDRIVEWAY DAMAGED. ROCKS AND MUD WASHED ACROSS DRIVEWAY AND ROAD.
Jul 13, 2:55 PM MSTHEAVY RAIN 1.254 Ene Hualapai Mountain, AZLOTS OF RUNOFF WHICH FILLED HIS LAKE TO SIX FEET DEEP. THE LAKE WAS EMPTY BEFORE THE STORM. RAINFALL MEASURED AT 1.25 INCHES WITH THE THUNDERSTORM.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 9.4 hours before the alert went out and 185 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 2012-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 197 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 12:00Z on 2012-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 square meters per square second.193958Sfc1 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
197 J/kg
Mixed-layer CIN
-82 J/kg
Mixed-layer LCL
1428 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
36 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.

423 
WGUS55 KVEF 132124
FFWVEF
AZC015-132315-
/O.NEW.KVEF.FF.W.0003.120713T2124Z-120713T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
224 PM MST FRI JUL 13 2012

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 415 PM MST.

* AT 210 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
VERY HEAVY RAIN FROM THUNDERSTORMS NEAR INTERSTATE 40 AND HUALAPAI 
MOUNTAIN OR ABOUT 15 MILES SOUTHEAST OF KINGMAN. THE STORMS PRODUCING
VERY HEAVY RAIN WERE MOVING VERY SLOWLY TO THE NORTH.

* LOCATIONS IMPACTED INCLUDE...
  WILD COW CAMPGROUND...HUALAPAI MOUNTAIN PARK AND BLAKE RANCH RV
  PARK.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 58 AND 76.

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 BY USING THE TWITTER HASHTAG...
NWSVEGAS.

&&

LAT...LON 3527 11394 3525 11362 3477 11360 3479 11385
      3494 11397

$$

JH
2 follow-up statements
475 
WGUS75 KVEF 132210
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
310 PM MST FRI JUL 13 2012

AZC015-132315-
/O.CON.KVEF.FF.W.0003.000000T0000Z-120713T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
310 PM MST FRI JUL 13 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM MST FOR
CENTRAL MOHAVE COUNTY...

AT 303 PM MST...TRAINED WEATHER SPOTTERS REPORTED HEAVY RAIN 
PRODUCING FLASH FLOODING. THE STORMS WHICH PRODUCED HEAVY RAIN WERE 
WEAKENING BUT WERE STILL LOCATED ON EITHER SIDE OF INTERSTATE 40 
BETWEEN MILE MARKERS 58 AND 76. ALTHOUGH RAINFALL WAS DECREASING 
ADDITIONAL RUNOFF IS STILL EXPECTED. 

LOCATIONS IMPACTED INCLUDE...

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 BY USING THE TWITTER HASHTAG...
NWSVEGAS.

&&

LAT...LON 3527 11394 3525 11362 3477 11360 3479 11385
      3494 11397

$$

HARRISON
517 
WGUS75 KVEF 132308
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
408 PM MST FRI JUL 13 2012

AZC015-132316-
/O.EXP.KVEF.FF.W.0003.000000T0000Z-120713T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
408 PM MST FRI JUL 13 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 415 PM MST FOR CENTRAL
MOHAVE COUNTY...

RAINFALL MOVED OUT OF THE WARNING AREA AND THERE HAVE BEEN NO 
ADDITIONAL REPORTS OF FLOODING. A FLASH FLOOD WATCH REMAINS IN 
EFFECT THROUGH SATURDAY EVENING SO MORE THUNDERSTORMS COULD FORM IN 
THE AREA. THE IMMEDIATE THREAT OF FLASH FLOODING HAS ENDED. 

LAT...LON 3527 11394 3525 11362 3477 11360 3479 11385
      3494 11397

$$

JH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 7:03 AM MSTAreal Flood AdvisoryVEFMohave117 min
Jul 13, 11:12 AM MSTAreal Flood AdvisoryVEFMohave2 hr
Jul 13, 4:25 PM MSTFlash Flood WarningVEFMohave89 min

Nearby

Flash Flood Warnings in Arizona, 2012Every flash flood warning in 2012

Sources

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