Alert archive / Wyoming / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 32, NWS Cheyenne, WY

June 13, 1997Albany County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 13, 1997, 4:53 PM MDT for Albany County, Wyoming. It was in force for 42 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
Jun 13, 1997, 4:53 PM MDT (22:53 UTC)
Expired
Jun 13, 1997, 5:35 PM MDT
In force
42 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Albany County, WY

The radar

The Cheyenne radar (KCYS), 95 km from the middle of the area, began a volume at 22:53 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.9 hours before the alert went out and 289 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 12:00Z on 1997-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 24 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 12:00Z on 1997-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 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
24 J/kg
Mixed-layer CIN
-183 J/kg
Mixed-layer LCL
1419 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
-27 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 KCYS 132254
SVRCYS
WYC001-132335-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
453 PM MDT FRI JUN 13 1997

* SEVERE THUNDERSTORM WARNING FOR
  NORTHWESTERN ALBANY COUNTY IN SOUTHEASTERN WYOMING

* UNTIL 535 PM MDT

* THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS.

* AT 449 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR 43 MILES NORTH OF LARAMIE OR 5 MILES NORTH OF ROCK CREEK
  MOVING NORTH AT 10 MPH.  CONSIDERABLE HAIL...UP TO AN INCH IN 
  DIAMETER IS LIKELY WITH THIS STORM.  
 
IF YOU ARE DRIVING IN THIS AREA...YOU SHOULD BE PREPARED TO PULL
OFF THE ROAD FOR SHELTER AS THE THUNDERSTORMS APPROACH.

WCJIN-WYSE-
WEILAND

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; radar from the NEXRAD Level II archive.