Alert archive / Wyoming / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 12, NWS Cheyenne, WY

May 25, 1997Laramie County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at May 25, 1997, 7:56 PM MDT for Laramie County, Wyoming. It was in force for 34 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
May 25, 1997, 7:56 PM MDT (01:56 UTC)
Expired
May 25, 1997, 8:30 PM MDT
In force
34 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Laramie County, WY

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 1.9 hours before the alert went out and 202 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, Denver, CO at 00:00Z on 1997-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 36 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, Denver, CO at 00:00Z on 1997-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 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
36 J/kg
Mixed-layer CIN
-94 J/kg
Mixed-layer LCL
1679 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
134 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

331 
WUUS1 KCYS 260157 RRA
SVRCYS
WYC021-260230-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
756 PM MDT SUN MAY 25 1997

* SEVERE THUNDERSTORM WARNING FOR
  SOUTHWESTERN LARAMIE COUNTY IN SOUTHEASTERN WYOMING

* UNTIL 830 PM MDT

* SOME AFFECTED LOCATIONS INCLUDE
  FE WARREN AFB                               BY 805 PM
  NORTHWEST CHEYENNE                          BY 810 PM
  INTERSECTION OF I-25 AND U.S. HIGHWAY 85    BY 812 PM

* AT 754 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 7
  MILES WEST CHEYENNE.  THIS STORM WAS MOVING EAST AT 10 MPH.  THIS
  STORM   WILL HAIL UP TO INCH IN DIAMETER.
 
 
TAKE SHELTER INSIDE A STRONG BUILDING.  DO NOT STAND BY WINDOWS.

WCJIN-WYSE
DMM

Nearby

Severe Thunderstorm Warnings in Wyoming, 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.