Alert archive / Arizona / Flash Flood Warnings in 2003

Flash Flood Warning 7, NWS Las Vegas, NV

July 25, 2003Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Jul 25, 2003, 3:30 PM MST for Mohave County, Arizona. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 25, 2003, 3:30 PM MST (22:30 UTC)
Expired
Jul 25, 2003, 4:30 PM MST
In force
60 min
Issued by
NWS Las Vegas, NV
Area
Whole counties

County Mohave County, AZ

The radar

The Las Vegas radar (KESX), 102 km from the middle of the area, began a volume at 22:34 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, 10.5 hours before the alert went out and 185 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 2003-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 294 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 12:00Z on 2003-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 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
294 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
1384 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
-5 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.

000 
WGUS55 KVEF 252230
FFWVEF
AZC015-260030-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
330 PM MST FRI JUL 25 2003

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS EXTENDED THE

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

* UNTIL 530 PM MST

* AT 326 PM MST NATIONAL WEATHER SERVICE RADAR INDICATED A BAND      
  MODERATE TO HEAVY RAIN FROM JUST NORTH OF PEACH SPRINGS THROUGH    
  THE GRAND CANYON NATIONAL PARK.

SEVERE FLASH FLOODING HAS OCCURRED IN PEACH SPRINGS AND ADDITIONAL 
RAIN AND RUNOFF WILL CONTINUE TO PRODUCE FLOODING FOR THE NEXT TWO 
HOURS.

NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROADWAY.
IT ONLY TAKES A FOOT OR TWO OF FLOWING WATER TO WASH MOST CARS AWAY.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.

$$

LAT...LON 3585 11371 3535 11341 3554 11308 3608 11346

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 11:23 AM MSTSevere Thunderstorm WarningVEFMohave52 min
Jul 25, 12:50 PM MSTSevere Thunderstorm WarningVEFMohave55 min
Jul 25, 1:22 PM MSTSevere Thunderstorm WarningVEFMohave38 min
Jul 25, 1:31 PM MSTFlash Flood WarningVEFMohave59 min
Jul 25, 2:02 PM MSTSevere Thunderstorm WarningVEFMohave28 min

Nearby

Flash Flood Warnings in Arizona, 2003Every flash flood warning in 2003

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.