Alert archive / Wyoming / Tornado Warnings in 1987
Tornado Warning 5, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Jun 7, 1987, 10:04 PM MDT for Goshen County, Wyoming. It was in force for 56 min.
The area
The counties it named.
The facts
- Issued
- Jun 7, 1987, 10:04 PM MDT (04:04 UTC)
- Expired
- Jun 7, 1987, 11:00 PM MDT
- In force
- 56 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Goshen 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
Rapid City, SD (KRAP), launched 00:00Z, 4.1 hours before the alert went out and 251 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
- 651 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 1311 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCYS 080404 TORCYS WYC015-080500- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 1004 PM MDT SUN JUN 7 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 1100 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHEAST WYOMING...SOUTHERN GOSHEN COUNTY THIS INCLUDES THE CITIES OF TORRINGTON...VETERAN...YODER... HAWK SPRINGS AND LA GRANGE WYOMING. A TORNADO WAS REPORTED ON THE GROUND BY THE PUBLIC AT 945 PM MDT 15 MILES WEST OF VETERAN WYOMING. VETERAN IS 60 MILES NORTHEAST OF CHEYENNE WYOMING. IF YOU ARE IN THE PATH OF THIS TORNADO...THE SAFEST PLACE IS A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM ON THE LOWEST FLOOR. USE BLANKETS OR PILLOWS TO COVER YOUR BODY. RIZZO
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 7, 6:14 PM MDT, 3 hours 50 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 612 PM MDT SUN JUN 7 1987 ...SEVERE THUNDERSTORM WARNING FOR NORTHWEST ALBANY AND CENTRAL PLATTE COUNTIES UNTIL 630 PM... AT 547 PM A SEVERE THUNDERSTORM WAS LOCATED OVER THE RIDGE OF THE LARAMIE RANGE...25 MILES EAST OF GARRETT OR 40 MILES SOUTHEAST OF DOUGLAS. THIS SEVERE THUNDERSTORM WAS STATIONARY...CREATING THE POTENTIAL FOR FLASH FLOODING. RADAR INDICATED THAT THIS THUNDERSTORM ALSO HAS THE POTENTIAL TO PRODUCE LARGE DAMAGING HAIL. RAIN FROM THIS SEVERE THUNDERSTORM WILL FEED INTO THE NORTH LARAMIE RIVER BASIN. PERSONS IN THE TOWN OF UVA...59 MILES NORTH OF CHEYENNE ...SHOULD BE ON THE WATCH FOR POSSIBLE FLASH FLOODING. LARGE HAIL...VERY HEAVY RAIN AND DAMAGING HAIL ARE POSSIBLE WITH SEVERE THUNDERSTORMS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE TO ESCAPE THE FLOOD WATERS. DO NOT STAY IN AREAS PRONE TO FLOODING IF WATERS START TO RAISE. W IF YOU EXPERIENCE SEVERE WEATHER...REPORT IT TO THE NATIONAL WEATHER SERVICE OR TO THE NEAREST LAW ENFORCEMENT AGENCY AS SOON AS POSSIBLE. ML
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 6:30 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Platte | 60 min |
| Jun 7, 7:25 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 65 min |
| Jun 7, 7:35 PM MDT | Tornado Warning | CYS | Platte | 55 min |
| Jun 7, 8:30 PM MDT | Severe Thunderstorm Warning | CYS | Laramie, Platte | 60 min |
| Jun 7, 9:03 PM MDT | Flash Flood Warning | CYS | Platte | 3 hr |
| Jun 7, 9:33 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 57 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.