Alert archive / Wyoming / Tornado Warnings in 1991
Tornado Warning 30, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Jun 22, 1991, 2:12 PM MDT for Laramie County, Wyoming. It was in force for 48 min.
The area
The counties it named.
The facts
- Issued
- Jun 22, 1991, 2:12 PM MDT (20:12 UTC)
- Expired
- Jun 22, 1991, 3:00 PM MDT
- In force
- 48 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Laramie County, WY
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 8.2 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
- 299 J/kg
- Mixed-layer CIN
- -102 J/kg
- Mixed-layer LCL
- 841 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 161 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCYS 222016 TORCYS WYC021-222115- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 212 PM MDT SAT JUN 22 1991 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 315 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST WYOMING ...WESTERN LARAMIE COUNTY THIS DOES INCLUDE THE CITY OF CHEYENNE. AT 205 PM MDT...A FUNNEL CLOUD WAS SIGHTED ABOUT 15 MILES SOUTHWEST OF THE CHEYENNE AIRPORT. THE STORMS WERE MOVING NORTHEAST. THE FUNNEL TOUCHED GROUND FOR ABOUT 4 TO 5 MINUTES AND THEN RETURNED TO THE CLOUD. HOWEVER IT COULD TOUCH DOWN AGAIN. IF YOU ARE IN THE PATH OF A 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 SUCH AS A CLOSET ON THE LOWEST FLOOR. USE BLANKETS...PILLOWS... OR CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS. A TORNADO WATCH IS IN EFFECT FOR THE AREA UNTIL 900 PM MDT. CAS
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 22, 12:48 PM MDT, 1 hour 24 minutes before
WYZ005-006-011-012-016-017-222100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1248 PM MDT SAT JUN 22 1991 ...A TORNADO WATCH HAS BEEN ISSUED FOR A LARGE PART OF EASTERN WYOMING UNTIL 8PM TONIGHT... THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WATCH FOR MUCH OF EASTERN WYOMING. THE WATCH IS IN EFFECT FROM 1PM THIS AFTERNOON UNTIL 8PM THIS EVENING. A WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR THE DEVELOPEMENT OF SEVERE WEATHER. AS OF 1230PM THERE HAD BEEN NO SEVERE WEATHER REPORTED. PEOPLE IN THE WATCH AREA ARE ADVISED TO TO KEEP ABREAST OF THE LATEST WEATHER DEVELOPEMENTS. IN THE EVENT THREATENING WEATHER APPEARS...BE PREPARED TO TAKE SHELTER AS NECESSARY. COUNTIES IN THE TORNADO WATCH AREA ARE...CAMPBELL...CONVERSE... PLATTE...ALBANY...CROOK...WESTON...NIOBRARA...GOSHEN...LARAMIE... EASTERN SHERIDAN...EASTERN JOHNSON...EASTERN NATRONA...AND EXTREME EASTERN CARBON. SOME WYOMING CITIES IN THE WtATCH ARE...SHERIDAN...CASPER...TORRINGTON ...BUFFALO...DOUGLAS...CHEYENNE...GILLETTE...LUSK...PINE BLUFFS... SUNDANCE...GLENROCK...MOORCROFT...LARAMIE...NEWCASTLE...AND WHEATLAND. CGB
Special weather statement, Jun 22, 1:43 PM MDT, 29 minutes before
WYZ016-017-222100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 142 PM MDT SAT JUN 22 1991 ...A TORNADO WATCH HAS BEEN ISSUED FOR A LARGE PART OF EASTERN WYOMING UNTIL 8PM TONIGHT... THUNDERSTORMS HAVE BEGUN TO DEVELOP OVER A PART OF SOUTHEAST WYOMING. SHORTLY AFTER 130PM THIS AFTERNOON WEATHER RADAR INDICATED THAT THE STRONGEST STORMS WERE MOVING INTO THE SOUTHEAST CORNER OF WYOMING FROM NORTHERN COLORADO. AT THAT TIME THEY WERE 15 TO 20 MILES SOUTHWEST OF CHEYENNE...MOVING NORTHEAST AROUND 20 MILES AN HOUR. OTHER THUNDERSTORMS WERE INTENSIFYING OVER CENTRAL AND NORTHERN ALBANY COUNTY. THE STRONGEST WERE JUST NORTH OF THE TOWN OF GARRETT ...WHICH IS 33 MILES WEST OF WHEATLAND. A TORNADO WATCH REMAINS IN EFFECT FOR A LARGE PART OF EASTERN WYOMING UNTIL 8PM THIS EVENING. PERSONS IN THIS AREA SHOULD KEEP ABREAST OF THE LATEST WEATHER DEVELOPEMENTS. BE PREPARED TO SEEK SHELFTER IF THREATENING WEATHER APPROACHES. CGB
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 6:59 PM MDT | Flash Flood Warning | CYS | Albany | 4 hr |
| Jun 21, 7:16 PM MDT | Flash Flood Warning | CYS | Albany | 4 hr |
| Jun 21, 7:59 PM MDT | Flash Flood Warning | CYS | Albany, Platte | 4 hr |
Nearby
Tornado Warnings in Wyoming, 1991Every tornado warning in 1991Tornadoes in 1991
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.