Alert archive / Arizona / Flash Flood Warnings in 2001

Flash Flood Warning 2, NWS Las Vegas, NV

July 5, 2001Mohave County, Arizona; Clark County, Nevada

NWS Las Vegas, NV issued this flash flood warning at Jul 5, 2001, 2:37 PM MST for Mohave County, Arizona; Clark County, Nevada. It was in force for 113 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Jul 5, 2001, 2:37 PM MST (21:37 UTC)
Expired
Jul 5, 2001, 4:30 PM MST
In force
113 min
Issued by
NWS Las Vegas, NV
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Mohave County, AZ, Clark County, NV

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 12:00Z, 9.6 hours before the alert went out and 207 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, Mercury/Desert R, NV at 12:00Z on 2001-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1778 joules per kilogram.LCLLFCEL10008507005003002001001 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, Mercury/Desert R, NV at 12:00Z on 2001-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 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
1778 J/kg
Mixed-layer CIN
-119 J/kg
Mixed-layer LCL
2138 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
96 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS55 KVEF 052137
FFWVEF
AZC015-NVC003-060030-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
237 PM MST THU JUL 5 2001

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN MOHAVE COUNTY IN NORTHWEST ARIZONA
  EXTREME NORTHEASTERN CLARK COUNTY IN SOUTHERN NEVADA
  THIS INCLUDES THE FOLLOWING LOCATIONS...
  IN NEVADA...BUNKERVILLE...MESQUITE...
  IN ARIZONA...LITTLEFIELD...THE VIRGIN RIVER GORGE...
               MT TRUMBULL...TUWEEP...

* UNTIL 530 PM MST(530 PM PDT)

* AT 230 PM MST(230 PM PDT)...NATIONAL WEATHER SERVICE DOPPLER
  RADAR INDICATED AN AREA OF THUNDERSTORMS WITH VERY HEAVY RAIN
  FROM THE VIRGIN RIVER ACROSS THE ARIZONA STRIP TO MT TRUMBULL.

HEAVY RAINFALL AND EXCESSIVE RUNOFF FROM THESE STORMS WILL CAUSE
FLASH FLOODING OF WASHES AND NARROW CANYONS. THE HEAVY RAINS COULD
ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN.

LAT...LON 3679 11413 3638 11403 3623 11295 3698 11294
          3698 11389

RUNK

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 4, 5:34 PM MSTSevere Thunderstorm WarningVEFMohave56 min
Jul 5, 1:50 PM MSTFlash Flood WarningVEFMohave115 min
Jul 5, 1:54 PM MSTTornado WarningVEFMohave51 min
Jul 5, 4:01 PM MSTFlash Flood WarningVEFClark, Lincoln3 hr

Nearby

Flash Flood Warnings in Arizona, 2001Flash Flood Warnings in Nevada, 2001Every flash flood warning in 2001

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.