Alert archive / Arizona / Flash Flood Warnings in 2012

Flash Flood Warning 115, NWS Las Vegas, NV

August 15, 2012Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Aug 15, 2012, 1:51 PM MST for Mohave County, Arizona. It was in force for 114 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
Aug 15, 2012, 1:51 PM MST (20:51 UTC)
Expired
Aug 15, 2012, 3:45 PM MST
In force
114 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), 120 km from the middle of the area, began a volume at 20:51 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, 8.9 hours before the alert went out and 182 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 2012-08-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 22 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 2012-08-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
22 J/kg
Mixed-layer CIN
-118 J/kg
Mixed-layer LCL
1908 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
49 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.

551 
WGUS55 KVEF 152051
FFWVEF
AZC015-152245-
/O.NEW.KVEF.FF.W.0115.120815T2051Z-120815T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
151 PM MST WED AUG 15 2012

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 345 PM MST.

* AT 145 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM NEAR BLAKE RANCH RV PARK...OR
  15 MILES EAST OF KINGMAN. THE STORM PRODUCING VERY HEAVY RAIN WAS
  NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  BLAKE RANCH RV PARK AS WELL AS NEARBY PORTIONS OF COUNTY HIGHWAY   
  193.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 65 AND 71.

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 3521 11380 3518 11369 3488 11374 3501 11393

$$

STACHELSKI
2 follow-up statements
209 
WGUS75 KVEF 152148
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
248 PM MST WED AUG 15 2012

AZC015-152245-
/O.CON.KVEF.FF.W.0115.000000T0000Z-120815T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.IO/
MOHAVE AZ-
248 PM MST WED AUG 15 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM MST FOR
CENTRAL MOHAVE COUNTY...

AT 248 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN.  THIS STORM WAS 
LOCATED JUST SOUTH OF INTERSTATE 40 AND WEST OF HIGHWAY 93 NEAR 
BLAKE RANCH RV PARK. THE THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY 
STATIONARY...WITH LATEST TOTAL RAINFALL ESTIMATES BETWEEN 2 AND 3 
INCHES OVER THE PAST HOUR. 

LOCATIONS IMPACTED INCLUDE...RURAL ROADS SOUTH OF I40 AND WEST OF 
HIGHWAY 93 SUCH AS COUNTY ROADS 193 AND 129...AND BLAKE 
RANCH...WILSON RANCH...AND MOUNTAIN SHADOW ROADS. 

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 3521 11380 3518 11369 3488 11374 3501 11393

$$
KENNEDY
727 
WGUS75 KVEF 152241
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
341 PM MST WED AUG 15 2012

AZC015-152245-
/O.EXP.KVEF.FF.W.0115.000000T0000Z-120815T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.IO/
MOHAVE AZ-
341 PM MST WED AUG 15 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 345 PM MST FOR CENTRAL
MOHAVE COUNTY...

THUNDERSTORMS HAVE DISSIPATED SOUTH OF INTERSTATE 40 AND WEST OF 
HIGHWAY 93 NEAR BLAKE RANCH RV PARK...AND THE FLASH FLOOD WARNING 
WILL BE ALLOWED TO EXPIRE. ANY MOTORISTS TRAVELING ALONG RURAL 
ROADS SOUTH OF I40 AND WEST OF HIGHWAY 93 SUCH AS COUNTY ROADS 193 
AND 129...AND BLAKE RANCH...WILSON RANCH...AND MOUNTAIN SHADOW ROADS 
ARE ADVISED TO USE CAUTION NEAR WASHES...AS MUD AND DEBRIS HAVE 
LIKELY BEEN DEPOSITED ACROSS THESE RURAL ROADS.

LAT...LON 3521 11380 3518 11369 3488 11374 3501 11393

$$

KENNEDY

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 15, 4:13 PM MSTSevere Thunderstorm WarningVEFMohave36 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.