Alert archive / Nevada / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 91, NWS Las Vegas, NV

September 7, 1997Lincoln County, Nevada

NWS Las Vegas, NV issued this severe thunderstorm warning at Sep 7, 1997, 12:11 PM PDT for Lincoln County, Nevada. It was in force for 64 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: Sep 7, 1997, 12:11 PM PDT (19:11 UTC)
Expired: Sep 7, 1997, 1:15 PM PDT
In force: 64 min
Issued by: NWS Las Vegas, NV
Area: Whole counties

County Lincoln County, NV

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 12:00Z, 7.2 hours before the alert went out and 151 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: 68 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 2556 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KLAS 071912 RRA
SVRLAS
NVC017-072015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1211 PM PDT SUN SEP 7 1997
 
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  115 PM PDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN SOUTH CENTRAL NEVADA
 
   ...EASTERN LINCOLN COUNTY
 
AT 1210 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
THUNDERSTORM MOVING INTO CALIENTE. HEAVY RAIN WAS REPORTED BY THE
SHERIFFS OFFICE IN CALIENTE. THE STORM WAS MOVING SLOWLY EAST AT 5 TO 10
MPH.
 
 
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.

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 Sep 7, 8:46 AM PDT, 3 hours 25 minutes earlier.

Area forecast discussion, Sep 7, 8:46 AM PDT, 3 hours 25 minutes before

MOJAVE DESERT/SOUTHERN GREAT BASIN AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
846 AM PDT SUN SEP 7 1997

MAIN SFC MSTR AXIS HAS SHIFTED SLGTLY FROM W TO E FROM 24 HRS AGO.
SWLY FLOW REGIME OVR NWRN PRTNS OF FA SUCH THE INYO CO...WRN NYE
AND ESMERALDA CO HAVE DRIED OUT CONSIDERABLY.  ACRS THE EASTERN
TWO THIRDS OF FA SOME INCREASE OR NO CHANGE IN SFC-H7 MSTR HAS
OCCURRED.  BEST MSTR REMAINS EAST OF LINE FROM P38-DRA-NXP.
HOWEVER...A LITTLE STRONGER 650 MB CAP INDICATED THAN YSTDYS 12Z
DRA SOUNDING.  NUETRAL OR WK WAA PROGGD AT HIR LVLS TDY SO CAPS
SHOULD KEEP CONVECTIVE ACTIVITY SUPPRESSED TDY OVR MUCH OF THE
FA UNTIL 00Z.  MOST CONVECTION ACTIVITY TDY WL BE TERRAIN INDUCED
AND CURRENT FCST COVERS THIS WELL.

FOR MON...NEW 12Z ETA NOT AS BULLISH AS PREVIOUS 00Z IN BRINGING
IN LOW LVL MSTR UP FROM THE S AS SWLY WNDS BACK S OVRNGT INTO TMW
MRNG.  ANOTHER MATTER TO LUK AT FOR TMW IS THAT S/W NR 130W/30N
AHEAD OF THE REMANTS OF T.S. KEVIN TO TRANSLATE NWRD UP ALG THE
CA CST.  BELIEVE MSTR OF T.S. KEVIN WL PRETTY MUCH TAKE THE SAME
TREK AS PREVIOUS MID SUMMER REMANTS OF T.S. IGNACIO AND REMAIN
PRETTY MUCH WELL WWRD OF THE WINDWARD SIDE OF THE SIERRA AND REMAIN
ALG THE W CST AND NOT BRING MUCH AFFECT TO THE WRN PRTNS OF FA.
THESE MATTERS WILL BE LUKED AT AS DAY PROGRESSES TWRDS THE AFTN
FCST PACKAGE.  LAS012.  CORDERO

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 1:09 PM PDT	Flash Flood Warning	VEF	Lincoln	2 hr

Nearby

Severe Thunderstorm Warnings in Nevada, 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.