Alert archive / Arizona / Flash Flood Warnings in 1997

Flash Flood Warning 49, NWS Las Vegas, NV

September 1, 1997Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Sep 1, 1997, 2:30 PM MST for Mohave County, Arizona. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 1, 1997, 2:30 PM MST (21:30 UTC)
Expired
Sep 1, 1997, 4:30 PM MST
In force
2 hr
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 21:30 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, 9.5 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 1997-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 118 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 1997-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 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
118 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
1302 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
110 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 
TTAA00 KLAS 012131
FFWLAS
AZC015-012325-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
230 PM PDT MON SEP 01 1997

THE NATIONAL WEATHER SERVICE IN LAS VEGAS NV HAS ISSUED A FLASH
FLOOD WARNING EFFECTIVE UNTIL 430 PM MST FOR PEOPLE IN THE
FOLLOWING LOCATIONS...

IN NORTHWEST ARIZONA

  ...CENTRAL MOHAVE COUNTY

...THIS EXPANDS AND EXTENDS THE PREVIOUS WARNING FOR EAST
CENTRAL MOHAVE COUNTY THAT WAS ISSUED UNTIL 330 PM MST...

AT 225 PM...THUNDERSTORMS PRODUCING VERY HEAVY RAIN WERE LOCATED
IN CENTRAL MOHAVE COUNTY EXTENDING FROM BULLHEAD CITY ALONG
HIGHWAY 68 TO 10 MILES SOUTHEAST OF KINGMAN.  DOPPLER RADAR
RAINFALL ESTIMATES INDICATED BETWEEN ONE AND TWO INCHES OF RAIN
HAS FALLEN OVER HAULAPAI MOUNTAIN AND ALSO IN THE SACRAMENTO
VALLEY ALONG HIGHWAY 68.  HEAVY RAIN WILL CONTINUE TO DRENCH
MOST OF CENTRAL MOHAVE COUNTY...FILLING DRY WASHES AND LOW LYING
AREAS UNTIL AT LEAST 430 PM MST.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. DO NOT TRY TO CROSS FLOODED HIGHWAYS. MOST FLASH FLOOD
DEATHS OCCUR IN AUTOMOBILES.  DO NOT TRY TO OUTRACE A FLASH
FLOOD. MOVE TO HIGHER GROUND.

ADAIR

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 1, 1:17 PM MSTFlash Flood WarningVEFMohave2 hr
Sep 1, 3:20 PM MSTFlash Flood WarningVEFMohave80 min
Sep 1, 3:20 PM MSTSevere Thunderstorm WarningVEFMohave80 min

Nearby

Flash Flood Warnings in Arizona, 1997Every flash flood warning in 1997

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.