Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 94, NWS Las Vegas, NV
NWS Las Vegas, NV issued this severe thunderstorm warning at Oct 21, 1997, 10:20 PM MST for Mohave County, Arizona. It was in force for 55 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
- Oct 21, 1997, 10:20 PM MST (05:20 UTC)
- Expired
- Oct 21, 1997, 11:15 PM MST
- In force
- 55 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, 5.3 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.
- Mixed-layer CAPE
- 14 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 2048 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLAS 220522 RRA SVRLAS AZC015-220615- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 1020 PM PDT (1020 PM MST) TUE OCT 21 1997 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1115 PM PDT (1115 PM MST) FOR PEOPLE IN THE FOLLOWING LOCATIONS...... IN NORTHWEST ARIZONA ...SOUTHERN MOHAVE COUNTY LAS VEGAS DOPPLER RADAR SHOWED A SEVERE THUNDERSTORM 10 MILES SOUTHEAST OF LAKE HAVASU CITY. THIS STORM WAS MOVING TOWARD THE NORTHWEST AT 25 MPH AND WILL AFFECT THE LAKE HAVASU CITY AREA WITHIN THE NEXT 30 MINUTES. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. MATUSIEWICZ/MAKER
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Las Vegas, NV wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 21, 9:05 PM MST, 1 hour 15 minutes earlier.
Area forecast discussion, Oct 21, 9:05 PM MST, 1 hour 15 minutes before
MOJAVE DESERT/SOUTHERN GREAT BASIN AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 845 PM PDT TUE OCT 21 1997 WATER VAPOR LOOP THIS EVE SHOWED AN UPR LOW ACRS SRN CALIFORNIA DROPPING SEWD. PLENTY OF MID LVL MSTR WAS BEING DRAWN N THEN NW INTO THIS SYS ACRS ERN ARIZONA THEN BACK ACROSS PTNS OF NW ARIZONA...SRN NEVADA AND SRN CALIFORNIA. KESX RADAR SHOWED STG THUNDERSTORMS DVLPG ACRS EXTREME SRN PTNS OF THE CWA NEAR LAKE HAVASU CITY AND ADJOINING AREAS OF SE CALIFORNIA. THESE AREAS LOOK PRIME FOR TRW ACTIVITY AT LEAST THE NEXT FEW HOURS AS 00Z ETA PROGGED CAPES AROUND 600 AND LIFTED INDICES TO -6 ACRS THIS AREA AT 06Z. FARTHER N...ACRS CNTRL MOHAVE COUNTY IN ARIZONA W ACRS CLARK COUNTY IN NEVADA...MAY SEE A STRAY RW/TRW TIL MIDNIGHT. DRY NRLY FLO HAD BUILT IN ACRS NRN PTNS OF THE CWA. THIS WL CONT THRU THE OVERNIGHT HOURS. 00Z MDLS SHOWED THE UPR LOW MOVING INTO SE ARIZONA BY TOMORROW AFTN WITH A DRIER NW FLO BUILDING ACRfS THE CWA. MADE FIRST PD CHANGES ACRS SRN NEVADA ZNS. RMNDR OF CURRENT FSCT PACKAGE LOOKED FINE. LAS 1000. MATUSIEWICZ SRN NV...NONE ERN CA...NONE NW AZ...NONE
Nearby
Severe Thunderstorm Warnings in Arizona, 1997Every severe thunderstorm 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.