Alert archive / Arizona / Flash Flood Warnings in 2012

Flash Flood Warning 41, NWS Las Vegas, NV

July 15, 2012Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Jul 15, 2012, 12:53 PM MST for Mohave County, Arizona. It was in force for 2 hr. 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 15, 2012, 12:53 PM MST (19:53 UTC)
Expired
Jul 15, 2012, 3:00 PM MST
In force
2 hr
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Flood severity
None

County Mohave County, AZ

The radar

The Las Vegas radar (KESX), 118 km from the middle of the area, began a volume at 19:53 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, 7.9 hours before the alert went out and 180 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 2012-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 76 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 2012-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 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
76 J/kg
Mixed-layer CIN
-117 J/kg
Mixed-layer LCL
1323 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
64 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.

705 
WGUS55 KVEF 151953
FFWVEF
AZC015-152200-
/O.NEW.KVEF.FF.W.0041.120715T1953Z-120715T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1253 PM MST SUN JUL 15 2012

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

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

* UNTIL 300 PM MST.

* AT 1245 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM NEAR BLAKE RANCH RV PARK...OR
  12 MILES EAST OF KINGMAN. THE STORM PRODUCING VERY HEAVY RAIN WAS
  NEARLY STATIONARY.

* LOCATIONS IMPACTED INCLUDE...
  BLAKE RANCH RV PARK.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 60 AND 72.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES...
AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS
NATURES NUMBER ONE KILLER. 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 3533 11384 3536 11362 3517 11368 3487 11368
      3492 11380 3510 11397

$$

JENSEN
2 follow-up statements
407 
WGUS75 KVEF 152058
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
158 PM MST SUN JUL 15 2012

AZC015-152200-
/O.CON.KVEF.FF.W.0041.000000T0000Z-120715T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
158 PM MST SUN JUL 15 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 PM MST FOR
CENTRAL MOHAVE COUNTY...

AT 150 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN.  THIS STORM WAS
LOCATED 6 MILES EAST OF WILD COW CAMPGROUND...OR 19 MILES SOUTHEAST
OF KINGMAN. THE THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY
STATIONARY.

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

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 60 AND 73.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES...
AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS
NATURES NUMBER ONE KILLER. 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 3533 11384 3536 11362 3517 11368 3487 11368
      3492 11380 3510 11397

$$

JENSEN
297 
WGUS75 KVEF 152156
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
256 PM MST SUN JUL 15 2012

AZC015-152203-
/O.EXP.KVEF.FF.W.0041.000000T0000Z-120715T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
256 PM MST SUN JUL 15 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 300 PM MST FOR CENTRAL
MOHAVE COUNTY...

THUNDERSTORMS WHICH PRODUCED HEAVY RAINFALL EARLIER HAVE MOVED OUT 
OF THE REGION. THUS WILL ALLOW THE FLASH FLOOD WARNING TO EXPIRE AS 
OF 3 PM MST THIS AFTERNOON.

ALTHOUGH THE FLASH FLOOD WARNING WILL EXPIRE...TRAVELERS ON 
INTERSTATE 40 AND ESPECIALLY ON OLD HIGHWAY 93 SHOULD BE PREPARED 
FOR PONDING WATER IN LOW LYING AREAS AND POSSIBLY WATER FLOWING IN 
NORMALLY DRY WASHES INTO THIS EVENING.

LAT...LON 3533 11384 3536 11362 3517 11368 3487 11368
      3492 11380 3510 11397

$$

JENSEN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 5:10 PM MSTFlash Flood WarningVEFMohave3 hr
Jul 14, 5:30 PM MSTFlash Flood WarningVEFMohave2 hr
Jul 14, 6:36 PM MSTFlash Flood WarningVEFMohave114 min
Jul 14, 8:20 PM MSTFlash Flood WarningVEFMohave115 min
Jul 14, 10:01 PM MSTFlash Flood WarningVEFMohave3 hr
Jul 15, 10:14 AM MSTFlash Flood WatchVEFMohave11 hr
Jul 15, 4:40 PM MSTFlash Flood WarningVEFMohave65 min
Jul 15, 4:58 PM MSTFlash Flood WarningVEFMohave92 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.