Alert archive / Wyoming / Tornado Warnings in 1987
Tornado Warning 7, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Jun 9, 1987, 8:01 PM MDT for Laramie County, Wyoming. It was in force for 29 min.
The area
The counties it named.
The facts
- Issued
- Jun 9, 1987, 8:01 PM MDT (02:01 UTC)
- Expired
- Jun 9, 1987, 8:30 PM MDT
- In force
- 29 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Laramie County, WY
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Denver, CO (KDEN), launched 00:00Z, 2.0 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1255 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -49 m²/s²
- 0-3 km storm-relative helicity
- -54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCYS 100201 TORCYS WYC021-100230- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 801 PM MDT TUE JUN 9 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 830 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHEAST WYOMING...EASTERN LARAMIE COUNTY INCLUDING THE TOWN OF BURNS 20 MILES EAST OF CHEYENNE AT 755 PM MDT A FUNNEL CLOUD WAS DETECTED BY RADAR AND SEEN FROM THE CHEYENNE AIRPORT 16 MILES NORTHEAST OF CHEYENNE MOVING TOWARD THE EAST AT 10 MILES AN HOUR. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...SEEK SHELTER IN A DITCH OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. SCOTT
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jun 9, 3:19 PM MDT, 4 hours 42 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 315 PM MDT TUE JUN 9 1987 ...SCATTERED THUNDERSTORMS MOVING TOWARDS THE SOUTHERN NEBRASKA PANHANDLE... AT 310 PM MDT..THUNDERSTORMS OVER NORTHEAST COLORADO WERE BEGINING TO CROSS INTO THE SOUTHERN NEBRASKA PANHANDLE. THE STRONGEST STORM WAS 15 MILES SOUTHWEST OF SIDNEY NEBRASKA AND WAS MOVING TO THE THE NORTHEAST AT 15 TO 20 MPH. HEAVY RAIN...SMALL HAIL AND GUSTY WINDOS ARE POSSIBLE WITH THESE THUNDERSTORMS OVER CHEYENNE AND DEUEL COUNTIES OF THE SOUTHERN NEBASKA PANHANDLE UNTIL 445 PM MDT THIS AFTERNOON. HONTON
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 7:37 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 68 min |
| Jun 9, 8:39 PM MDT | Tornado Warning | CYS | Laramie | 21 min |
Nearby
Tornado Warnings in Wyoming, 1987Every tornado warning in 1987Tornadoes in 1987
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.