Alert archive / Wyoming / Tornado Warnings in 1996

Tornado Warning 4, NWS Cheyenne, WY

May 30, 1996Goshen County, Platte County, Wyoming

NWS Cheyenne, WY issued this tornado warning at May 30, 1996, 3:17 PM MDT for Goshen County, Platte County, Wyoming. It was in force for 28 min. 2 reports 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: May 30, 1996, 3:17 PM MDT (21:17 UTC)
Expired: May 30, 1996, 3:45 PM MDT
In force: 28 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

Counties Goshen County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 107 km from the middle of the area, began a volume at 21:18 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
May 30, 3:24 PM MDT	Hail 1	Chugwater, WY
May 30, 3:30 PM MDT	Hail 1	Chugwater, 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 nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 9.3 hours before the alert went out and 261 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: 12 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 674 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 194 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 302119
TORCYS
WYC015-031-302145-
 
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
317 PM MDT THU MAY 30 1996
 
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  345 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST WYOMING
 
   ...SOUTHERN GOSHEN COUNTY...SOUTHEASTERN PLATTE COUNTY
 
AT 315 PM...PLATTE COUNTY SHERIFF REPORTED A FUNNEL CLOUD 5 MILES
SOUTHEAST OF CHUGWATER IN SOUTHERAST PLATTE COUNTY WYOMING. DOPPLER
RADAR IN CHEYENNE INDICATED GOOD ROTATION FOR SEVERAL STORMS
IN SOUTHEAST PLATTE COUNTY.  THE STORMS WERE MOVING TO THE SOUTHEAST
AT 10 MILES AN HOUR.
 
GO TO THE BASEMENT OR A SMALL INTERIOR ROOM >ON THE LOWEST FLOOR!
 
WCJIN-WYSE
PAL

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 1:32 PM MDT	Severe Thunderstorm Warning	CYS	Platte	58 min
May 30, 2:33 PM MDT	Flash Flood Warning	CYS	Platte	42 min
May 30, 2:33 PM MDT	Severe Thunderstorm Warning	CYS	Platte	42 min
May 30, 3:49 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Platte	26 min
May 30, 4:15 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	45 min
May 30, 5:03 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	27 min

Nearby

Tornado Warnings in Wyoming, 1996 Every tornado warning in 1996 Tornadoes in 1996

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.