Alert archive / Wyoming / Tornado Warnings in 1997

Tornado Warning 6, NWS Cheyenne, WY

June 10, 1997Platte County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jun 10, 1997, 6:57 PM MDT for Platte County, Wyoming. It was in force for 18 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 10, 1997, 6:57 PM MDT (00:57 UTC)
Expired
Jun 10, 1997, 7:15 PM MDT
In force
18 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Platte County, WY

The radar

The Cheyenne radar (KCYS), 110 km from the middle of the area, began a volume at 00:59 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

Rapid City, SD (KUNR), launched 00:00Z, 1.0 hours before the alert went out and 274 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, Rapid City, SD at 00:00Z on 1997-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 43 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Rapid City, SD at 00:00Z on 1997-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.19395878Sfc1 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
43 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
1419 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
146 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.

030 
WFUS1 KCYS 110059
TORCYS
WYC031-110115-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
657 PM MDT TUE JUN 10 1997

* TORNADO WARNING FOR
  PLATTE COUNTY IN SOUTHEASTERN WYOMING

* UNTIL 715 PM MDT

* THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS.

* AT 655 PM MDT...A POSSIBLE TORNADO WAS INDICATED BY DOPPLER RADAR
  AND SPOTTER REPORTS 26 MILES SOUTHEAST OF WHEATLAND OR 5 MILES
  SOUTHEAST OF CHUGWATER MOVING EAST AT 25 MPH.

 SEEK SHELTER IN AN INTERIOR ROOM SUCH AS A BATHROOM OR SMALL
CLOSET ON THE LOWEST FLOOR OF YOUR HOUSE AND COVER YOUR HEAD.

WCJIN
WEILAND

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.