Alert archive / Wyoming / Tornado Warnings in 1997

Tornado Warning 4, NWS Cheyenne, WY

June 1, 1997Laramie County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jun 1, 1997, 5:48 PM MDT for Laramie County, Wyoming. It was in force for 17 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 1, 1997, 5:48 PM MDT (23:48 UTC)
Expired: Jun 1, 1997, 6:05 PM MDT
In force: 17 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 23:51 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.

What was reported inside it

Time	Report	Where	Remark
Jun 1, 5:54 PM MDT	Hail 1.75	Pine Bluffs, WY

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 1, 4:45 PM MDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.8 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-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: 38 J/kg
Mixed-layer CIN: -458 J/kg
Mixed-layer LCL: 1704 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: -68 m²/s²
0-3 km storm-relative helicity: -16 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.

649 
WFUS1 KCYS 012349 RRA
TORCYS
WYC021-020005-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
548 PM MDT SUN JUN 1 1997

* TORNADO WARNING FOR
  NORTHEASTERN AND EAST CENTRAL LARAMIE COUNTY IN SOUTHEASTERN WYOMING

  THIS REPLACES THE SEVERE THUNDERSTORM WARNING FOR NORTHEAST
  LARAMIE COUNTY

* UNTIL 605 PM MDT

* SOME LOCATIONS AFFECTED
  LINDBERGH                            BY 547 PM MDT

* AT 546 PM MDT...A POSSIBLE TORNADO WAS INDICATED BY DOPPLER RADAR
  23 MILES WEST OF KIMBALL OR 1 MILE SOUTH OF LINDBERGH MOVING EAST
  AT 10 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-WYSE
JMH

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 1, 3:58 PM MDT	Severe Thunderstorm Warning	CYS	Platte	47 min
Jun 1, 4:25 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	45 min
Jun 1, 4:31 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie	44 min
Jun 1, 4:42 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	63 min
Jun 1, 5:07 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	48 min
Jun 1, 5:19 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	46 min

Nearby

Tornado Warnings in Wyoming, 1997 Every tornado warning in 1997 Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.