Alert archive / Arizona / Flash Flood Warnings in 1998

Flash Flood Warning 27, NWS Las Vegas, NV

August 15, 1998Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood warning at Aug 15, 1998, 5:37 PM MST for Mohave County, Arizona. 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 counties it named.

The facts

Issued
Aug 15, 1998, 5:37 PM MST (00:37 UTC)
Expired
Aug 15, 1998, 7:30 PM MST
In force
113 min
Issued by
NWS Las Vegas, NV
Area
Whole counties

County Mohave County, AZ

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 0.6 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 00:00Z on 1998-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 1998-08-16The 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2983 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
29 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 160037
FFWLAS
AZC015-160230-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
537 PM PDT (537 PM MST) SAT AUG 15 1998


*  FLASH FLOOD WARNING FOR
   SOUTHERN AND CENTRAL MOHAVE COUNTY IN NORTHWESTERN ARIZONA

*  UNTIL 730 PM MST (730 PM PDT)

*  SOME LOCATIONS AFFECTED
   LAKE HAVASU CITY
   YUCCA
   KINGMAN
   TRUXTON
   VALENTINE
   CHLORIDE
   DOLAN SPRINGS

*  A WEATHER SPOTTER REPORTED OVER ONE INCH OF RAIN IN LAKE HAVASU
CITY BETWEEN 445 AND 530 PM WITH RAIN STARTING TO TAPER OFF.
2 TO 3 FEET OF WATER HAS BEEN OBSERVED IN SOME WASHES ON THE SOUTH
SIDE OF TOWN.  THUNDERSTORMS PRODUCING HEAVY RAIN WILL INCREASE IN
AREAL COVERAGE OVER SOUTHERN AND CENTRAL MOHAVE COUNTY BETWEEN 530
AND 630 PM.  THIS WILL INCREASE THE THREAT OF FLASH FLOODING OVER
THE ENTIRE AREA AS WASHES WILL FILL RAPIDLY NEAR HEAVY RAIN SHOWERS.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Aug 15, 1:20 PM MST, 4 hours 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NEVADA
120 PM PDT SAT AUG 15 1998

TIME(PDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0815 PM    LAKE MEAD                 NV   FLOODING
08/14/98   CLARK                          WASHES BETWEEN LAS VEGAS
                                          BAY AND CALLVILLE BAY
                                          FILLED BANK-TO-BANK WITH
                                          UP TO 16 FEET OF WATER.
                                          ROADS WASHED OUT AND MAJOR
                                          DAMAGE TO CULVERTS. 30
                                          CAMPERS IN BOXCAR WASH
                                          STRANDED...RESCUED BY PARK
                                          SERVICE. NO INJURIES
                                          REPORTED.

Nearby

Flash Flood Warnings in Arizona, 1998Every flash flood warning in 1998

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.