Alert archive / Arizona / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 29, NWS Las Vegas, NV

August 5, 1997Mohave County, Arizona

NWS Las Vegas, NV issued this severe thunderstorm warning at Aug 5, 1997, 2:59 PM MST for Mohave County, Arizona. It was in force for 61 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 5, 1997, 2:59 PM MST (21:59 UTC)
Expired: Aug 5, 1997, 4:00 PM MST
In force: 61 min
Issued by: NWS Las Vegas, NV
Area: Whole counties

County Mohave County, AZ

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 10.0 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 411 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1155 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 64 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 052201 RRA
SVRLAS
AZC015-052300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
259 PM PDT (259 PM MST) TUE AUG 5 1997
 
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  400 PM PDT (400 PM MST)
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN NORTHWEST ARIZONA
 
   ...SOUTHEASTERN MOHAVE COUNTY
 
AT 259 PM LAS VEGAS DOPPLER WEATHER RADAR INDICATED A SEVERE
THUNDERSTORM LOCATED OVER THE HUALAPAI MOUNTAINS 12 MILES NORTHWEST OF
WIKIEUP IN SOUTHEAST MOHAVE COUNTY. THIS STORM WAS MOVING TO THE SOUTH
SOUTHEAST AT 10 TO 15 MPH AND HAS POTENTIAL FOR LARGE HAIL AND HIGH
WINDS IN ADDITION TO VERY HEAVY RAIN CAUSING LOCALIZED FLOODING.
 
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 BUSINESXS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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 Aug 5, 2:37 PM MST, 22 minutes earlier.

Area forecast discussion, Aug 5, 2:37 PM MST, 22 minutes before

MOJAVE DESERT/SOUTHERN GREAT BASIN AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
235 PM PDT TUE AUG 5 1997

BAND OF TSTMS EXTDD FROM SE ESMERALDA CNTY ACRS SRN NYE CNTY AT
2100Z.  THESE STORMS ARE FORMING IN ZONE OF ENHCD CNVRGC ALG TAIL
OF GREAT BASIN S/WV EVIDENT IN 4KM WATER VAPOR IMAGERY.  SEWD
PROPAGATION WILL TAKE DVLPMT DOWN HWY 95 TWD DRA.  ONLY MDT CU
FORMING IN WAKE OF THIS BNDRY AS LRG SCALE SUBSDNC BHND S/WV IS
SUPPRESSING VERT DVLPMT.  THEREFORE HAVE ELIMINATED MENTION OF EVNG
TSTMS FOR ZONES 13-15.  SMALL AREA OF NEW STORMS BGNG TO DVLP OVR
THE WRN SLOPES OF THE SPRING MTNS AND SVRL VIGOROUS CELLS HAVE
DVLPD IN SRN MOHAVE CNTY AZ.  AMS IS STILL QUITE MOIST AND STMS
ARE MOVG VRY SLOWLY SO EVNG SHIFT WILL NEED TO MONITOR CLOSELY
FOR LOCALIZED FLASH FLOODING. FOR TMRW PREFER ETA/AVN SOLNS IN
FORMG MID-LVL ACYC CENTER OVR SRN CA OR SRN NV.  DEEP CNVTN SHLD
BE LMTD TO A FEW OF THE HIER PEAKS WHERE STG VLY BRZ LIFT COULD
OVERCOME SYNOP SINKING.  OTHERWISE MAJORITY OF F/A WILL BE MOSUNNY
AND HI HGTS/THKNS WILL LIKELY RESULT IN HOTTEST DAY OF YEAR SO FAR
ON WED. EXTDD LOKS DRY THRU FRI BUT MRF SUGS HI WILL RE-PSN ITSELF
OVR SRN AZ/NM AND RETURN FLOW OF DEEP MSTR WILL BRING CHC FOR TSTMS
TO AREA AGAIN SAT/SUN.  LAS 0000.  RUNK

SRN NV...NONE
ERN CA...NONE
NW AZ ...NONE

Nearby

Severe Thunderstorm Warnings in Arizona, 1997 Every 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.