Alert archive / Arizona / Flash Flood Warnings in 2016

Flash Flood Warning 4, NWS Las Vegas, NV

April 11, 2016Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Apr 11, 2016, 1:31 PM MST for Mohave County, Arizona. It was in force for 3 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
Apr 11, 2016, 1:31 PM MST (20:31 UTC)
Expired
Apr 11, 2016, 4:30 PM MST
In force
3 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), 44 km from the middle of the area, began a volume at 20:33 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

Las Vegas, NV (KVEF), launched 12:00Z, 8.5 hours before the alert went out and 126 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, Las Vegas, NV at 12:00Z on 2016-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 13 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Las Vegas, NV at 12:00Z on 2016-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 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
13 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
730 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
33 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

699 
WGUS55 KVEF 112031
FFWVEF
AZC015-112330-
/O.NEW.KVEF.FF.W.0004.160411T2031Z-160411T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
131 PM MST MON APR 11 2016

THE NATIONAL WEATHER SERVICE IN LAS VEGAS  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN MOHAVE COUNTY IN NORTHWESTERN ARIZONA...

* UNTIL 430 PM MST

* AT 130 PM MST...THE PUBLIC REPORTED HEAVY RAIN OVER MAINLY RURAL
  AREAS OF MOHAVE COUNTY...NEAR WHITE HILLS. THE RAIN WILL CONTINUE.
  FLASH FLOODING OF NORMALLY DRY WASHES IS EXPECTED TO BEGIN SHORTLY.

* FLASH FLOODING WILL REMAIN OVER MAINLY RURAL AREAS OF WESTERN
  MOHAVE COUNTY.

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 3562 11442 3572 11448 3581 11452 3583 11432
      3568 11427

$$
BP
2 follow-up statements
168 
WGUS75 KVEF 112109
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
209 PM MST MON APR 11 2016

AZC015-112330-
/O.CON.KVEF.FF.W.0004.000000T0000Z-160411T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
209 PM MST MON APR 11 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM MST FOR
WESTERN MOHAVE COUNTY...

AT 205 PM MST...GAUGE REPORTS INDICATED THAT JUST OVER A HALF AN
INCH OF RAIN FELL NEAR THE INTERSECTION OF HIGHWAY 93 AND WHITE
HILLS ROAD. SOME WATER MAY LIKELY BE FLOWING ACROSS WHITE HILLS ROAD
WHERE IT CROSSES THE DETRITAL WASH. 

THE AREA OF HEAVY RAIN HAS DIMINISHED BUT FLASH FLOODING
WILL LIKELY CONTINUE TO OCCUR.

FLASH FLOODING WILL REMAIN OVER MAINLY RURAL AREAS OF WESTERN MOHAVE
COUNTY.

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 3562 11442 3572 11448 3581 11452 3583 11432
      3568 11427

$$

BP
330 
WGUS75 KVEF 112327
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
427 PM MST MON APR 11 2016

AZC015-112331-
/O.EXP.KVEF.FF.W.0004.000000T0000Z-160411T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
427 PM MST MON APR 11 2016

...THE FLASH FLOOD WARNING FOR WESTERN MOHAVE COUNTY WILL EXPIRE AT
430 PM MST...

FLOOD WATERS FROM EARLIER HEAVY RAIN SHOWERS NEAR HIGHWAY 93 BETWEEN
DOLAN SPRINGS AND TEMPLE BAR ROAD HAVE RECEDED.

LAT...LON 3562 11442 3572 11448 3581 11452 3583 11432
      3568 11427

$$

JGA

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 11, 3:07 PM MSTAreal Flood AdvisoryVEFMohave3 hr

Nearby

Flash Flood Warnings in Arizona, 2016Every flash flood warning in 2016

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.