Alert archive / Arizona / Flash Flood Warnings in 2016

Flash Flood Warning 38, NWS Las Vegas, NV

July 30, 2016Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Jul 30, 2016, 1:07 AM 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
Jul 30, 2016, 1:07 AM MST (08:07 UTC)
Expired
Jul 30, 2016, 4:00 AM 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), 85 km from the middle of the area, began a volume at 08:08 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 00:00Z, 8.1 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, Las Vegas, NV at 00:00Z on 2016-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 601 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Las Vegas, NV at 00:00Z on 2016-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
601 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
4036 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
73 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

555 
WGUS55 KVEF 300807
FFWVEF
AZC015-301100-
/O.NEW.KVEF.FF.W.0038.160730T0807Z-160730T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
107 AM MST SAT JUL 30 2016

THE NATIONAL WEATHER SERVICE IN LAS VEGAS  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST CENTRAL MOHAVE COUNTY IN NORTHWESTERN ARIZONA...

* UNTIL 400 AM MST

* AT 106 AM MST...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS EXPECTED TO
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  GOLDEN VALLEY...OATMAN...AND THE WESTERN PORTION OF KINGMAN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 3496 11448 3540 11449 3534 11417 3519 11408
      3512 11412 3488 11417

$$

WOLCOTT
2 follow-up statements
340 
WGUS75 KVEF 300933
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
233 AM MST SAT JUL 30 2016

AZC015-301100-
/O.CON.KVEF.FF.W.0038.000000T0000Z-160730T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
233 AM MST SAT JUL 30 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 AM MST FOR
WEST CENTRAL MOHAVE COUNTY...

AT 230 AM MST...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
THUNDERSTORMS PRODUCING HEAVY RAIN HAD ENDED OVER THE GOLDEN VALLEY
AREA. HOWEVER, FLASH FLOODING IS LIKELY ONGOING AT THIS TIME.
AUTOMATED GAUGES INDICATED 0.30 TO 1.50 INCHES OF RAIN HAD FALLEN IN
THE AREA OVER THE PAST 2 HOURS.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
GOLDEN VALLEY...OATMAN...AND THE WESTERN PORTION OF KINGMAN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. TURN AROUND, DON'T DROWN.

&&

LAT...LON 3496 11448 3540 11449 3534 11417 3519 11408
      3512 11412 3488 11417

$$

WOLCOTT
696 
WGUS75 KVEF 301056
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
356 AM MST SAT JUL 30 2016

AZC015-301105-
/O.EXP.KVEF.FF.W.0038.000000T0000Z-160730T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-
356 AM MST SAT JUL 30 2016

...THE FLASH FLOOD WARNING FOR WEST CENTRAL MOHAVE COUNTY WILL EXPIRE
AT 400 AM MST...

THE HEAVY RAIN HAS ENDED IN THE GOLDEN VALLEY AREA. ADDITIONAL
FLOODING IS NO LONGER EXPECTED...HOWEVER WATER STILL MAY BE FLOWING
IN NORMALLY DRY WASHES. A FLOOD WARNING REMAINS IN EFFECT FOR THE
SACRAMENTO WASH SOUTH OF GOLDEN VALLEY. PLEASE CONTINUE TO HEED ANY
REMAINING ROAD CLOSURES.

LAT...LON 3496 11448 3540 11449 3534 11417 3519 11408
      3512 11412 3488 11417

$$

WOLCOTT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 29, 11:41 PM MSTSevere Thunderstorm WarningVEFMohave71 min
Jul 30, 12:26 AM MSTSevere Thunderstorm WarningVEFMohave64 min
Jul 30, 12:50 AM MSTSevere Thunderstorm WarningVEFMohave85 min
Jul 30, 1:28 AM MSTAreal Flood AdvisoryVEFMohave3 hr
Jul 30, 2:24 AM MSTAreal Flood WarningVEFMohave12 hr
Jul 30, 2:22 PM MSTFlash Flood WatchVEFMohave12 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.