Alert archive / Arizona / Flash Flood Warnings in 2016

Flash Flood Warning 40, NWS Las Vegas, NV

July 30, 2016Mohave County, Arizona; Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Jul 30, 2016, 10:08 PM MST for Mohave County, Arizona; Clark County, Nevada. 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, 10:08 PM MST (05:08 UTC)
Expired
Jul 31, 2016, 1:15 AM MST
In force
3 hr
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Flood severity
None

Counties Mohave County, AZ, Clark County, NV

The radar

The Cedar City radar (KICX), 132 km from the middle of the area, began a volume at 05:11 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, 5.1 hours before the alert went out and 145 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 2016-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1038 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 2016-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 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
1038 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
3396 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
19 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

562 
WGUS55 KVEF 310508
FFWVEF
AZC015-NVC003-310815-
/O.NEW.KVEF.FF.W.0040.160731T0508Z-160731T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1008 PM PDT SAT JUL 30 2016

THE NATIONAL WEATHER SERVICE IN LAS VEGAS  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL MOHAVE COUNTY IN NORTHWESTERN ARIZONA...
  NORTHEASTERN CLARK COUNTY IN SOUTHERN NEVADA...

* UNTIL 115 AM PDT/115 AM MST/

* AT 1008 PM PDT/1008 PM 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...
  MESQUITE...LITTLEFIELD...BEAVER DAM...VIRGIN RIVER GORGE AND
  BUNKERVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3672 11380 3669 11428 3684 11429 3684 11405
      3700 11405 3700 11381

$$

STEELE
2 follow-up statements
427 
WGUS75 KVEF 310606
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1106 PM PDT SAT JUL 30 2016

AZC015-NVC003-310815-
/O.CON.KVEF.FF.W.0040.000000T0000Z-160731T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-CLARK NV-
1106 PM PDT SAT JUL 30 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 AM PDT/115 AM
MST/ FOR NORTH CENTRAL MOHAVE AND NORTHEASTERN CLARK COUNTIES...

AT 1105 PM PDT/1105 PM MST/...DOPPLER RADAR AND AUTOMATED RAIN GAUGES
INDICATED THUNDERSTORMS PRODUCED HEAVY RAIN OVER THE WARNED AREA.
FLASH FLOODING IS LIKELY ALREADY OCCURING OR WILL BEGIN SHORTLY.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MESQUITE...LITTLEFIELD...BEAVER DAM...VIRGIN RIVER GORGE AND
BUNKERVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3672 11380 3669 11428 3684 11429 3684 11405
      3700 11405 3700 11381

$$

STEELE
717 
WGUS75 KVEF 310807
FFSVEF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAS VEGAS NV
107 AM PDT SUN JUL 31 2016

AZC015-NVC003-310816-
/O.EXP.KVEF.FF.W.0040.000000T0000Z-160731T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MOHAVE AZ-CLARK NV-
107 AM PDT SUN JUL 31 2016

...THE FLASH FLOOD WARNING FOR NORTH CENTRAL MOHAVE AND NORTHEASTERN
CLARK COUNTIES WILL EXPIRE AT 115 AM PDT/115 AM MST/...

THE HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE A
THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.
ADDITIONAL THUNDERSTORMS COULD PRODUCE BRIEF PERIODS OF HEAVY RAIN
AND MINOR FLOODING IN THE NEXT THREE HOURS.

LAT...LON 3672 11380 3669 11428 3684 11429 3684 11405
      3700 11405 3700 11381

$$

CFS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 8:23 PM MSTSevere Thunderstorm WarningVEFMohave37 min
Jul 30, 9:05 PM MSTAreal Flood AdvisoryVEFMohave3 hr
Jul 30, 5:29 PM MSTSevere Thunderstorm WarningVEFLincoln31 min
Jul 30, 6:37 PM MSTAreal Flood AdvisoryVEFLincoln3 hr
Jul 30, 6:44 PM MSTSevere Thunderstorm WarningVEFLincoln, Nye46 min
Jul 30, 7:47 PM MSTFlash Flood WarningVEFLincoln3 hr
Jul 31, 2:39 PM MSTFlash Flood WarningVEFClark3 hr
Jul 31, 3:14 PM MSTSevere Thunderstorm WarningVEFClark61 min

Nearby

Flash Flood Warnings in Arizona, 2016Flash Flood Warnings in Nevada, 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.