Alert archive / Wyoming / Tornado Warnings in 1997

Tornado Warning 25, NWS Cheyenne, WY

July 6, 1997Laramie County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jul 6, 1997, 5:11 PM MDT for Laramie County, Wyoming. It was in force for 19 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
Jul 6, 1997, 5:11 PM MDT (23:11 UTC)
Expired
Jul 6, 1997, 5:30 PM MDT
In force
19 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Laramie County, WY

The radar

The Cheyenne radar (KCYS), 20 km from the middle of the area, began a volume at 23:10 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, 11.2 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 12:00Z on 1997-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 46 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 1997-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 140 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
46 J/kg
Mixed-layer CIN
-461 J/kg
Mixed-layer LCL
2062 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
140 m²/s²
0-3 km storm-relative helicity
222 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 062312 RRA
TORCYS
WYC021-062330-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
511 PM MDT SUN JUL 6 1997

* TORNADO WARNING FOR
  SOUTHEASTERN LARAMIE COUNTY IN SOUTHEASTERN WYOMING

* UNTIL 530 PM MDT

* THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS.

* AT 510 PM MDT...A POSSIBLE TORNADO WAS REPORTED BY A SPOTTER 25
  MILES WEST OF KIMBALL OR 5 MILES SOUTH OF PINE BLUFFS MOVING EAST
  AT 20 MPH.

 
 
MOBILE HOMES OFFER NO SHELTER.  LEAVE THEM IMMEDIATELY!  SEEK A STURDY
BUILDING...EVEN A DITCH OR RAVINE IS SAFER THAN A MOBILE HOME.

JAD

Nearby

Tornado Warnings in Wyoming, 1997Every tornado warning in 1997Tornadoes 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.