Alert archive / Nebraska / Tornado Warnings in 1991
Tornado Warning 27, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Jun 18, 1991, 4:18 PM MDT for Cheyenne County, Nebraska. It was in force for 27 min.
The area
The counties it named.
The facts
- Issued
- Jun 18, 1991, 4:18 PM MDT (22:18 UTC)
- Expired
- Jun 18, 1991, 4:45 PM MDT
- In force
- 27 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Cheyenne County, NE
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 10.3 hours before the alert went out and 151 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
- 2299 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 18, 2:27 PM MDT, 1 hour 51 minutes before
WYZ012-016-017-182200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 227 PM MDT TUE JUN 18 1991 ...INTENSE THUNDERSTORMS ARE DEVELOPING WEST OF THE LARAMIE RANGE... AT 215 PM MDT THUNDERSTORMS WERE DEVELOPING IN ALBANY COUNTY ABOUT 25 MILES NORTH OF LARAMIE NEAR THE TOWN OF BOSLER. THESE STORMS WERE MOVING TO THE EAST AT ABOUT 15 MILES AN HOUR AND SHOULD APPROACH WHEATLAND AND CHUGWATER WYOMING WITHIN THE NEXT HOUR. PEOPLE ALONG INTERSTATE 25 BETWEEN THESE TWO TOWNS SHOULD ALSO STAY ALERT. AT THE PRESENT TIME...RADAR IS INDICATING THAT THESES STORMS COULD HAVE PEA SIZED HAIL AND LOCALLY GUSTY SURFACE WINDS...BUT THEY WERE ALSO SHOWING SIGNS OF INTENSIFYING AS THEY MOVED EAST. PEOPLE IN ALBANY AND PLATTE COUNTIES OF WYOMING SHOULD KEEP AN EYE ON THE SKY AS THESE STORMS MOVE EAST. SHOULD THESE STORMS INTENSIFY FURTHER YOU SHOULD BE PREPARED TO MOVE TO A PLACE OF SAFETY AS QUICKLY AS POSSIBLE. PARKER
Special weather statement, Jun 18, 2:41 PM MDT, 1 hour 37 minutes before
WYZ012-016-017-182230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 240 PM MDT TUE JUN 18 1991 ...A TORNADO WATCH UNTIL 9PM MDT FOR SOUTHEAST WYOMING... A TORNADO WATCH HAS BEEN ISSUED FOR ALBANY...PLATTE...GOSHEN...LARAMIE SOUTHERN NIOBRARA AND SOUTHERN CONVERSE COUNTIES OF SOUTHEAST WYOMING UNTIL 9PM MDT. THIS WATCH INCLUDED THE CITIES OF LARAMIE...CHEYENNE WHEATLAND...CHUGWATER...TORRINGTON...LUSK...DOUGLAS AND PINE BLUFFS. SHORTLY AFTER 2PM MDT THIS AFTERNOON...THUNDERSTORMS WERE DEVELOPING ALONG THE LARAMIE RANGE NORTH OF THE TOWN OF LARAMIE. THESE STORMS WERE MOVING EAST AT ABOUT 15 MILES AN HOUR. PEOPLE IN THE WATCH AREA SHOULD BEGIN TO KEEP AN EYE ON THE SKY AND BE PREPARED TO MOVE TO A PLACE OF SAFETY SHOULD THREATENING WEATHER DEVELOP. BE SURE TO REPORT ANY HAIL...STRONG GUSTY WINDS...FUNNEL CLOUDS AND/OR TORNADOES TO THE NEAREST LOCAL AUTHORITIES OR TO THE NATIONAL WEATHER SERVICE. PARKER
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 3:35 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 25 min |
| Jun 18, 4:00 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne, Morrill | 60 min |
| Jun 18, 4:08 PM MDT | Severe Thunderstorm Warning | CYS | Banner | 67 min |
| Jun 18, 4:50 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne, Morrill | 25 min |
| Jun 18, 4:50 PM MDT | Severe Thunderstorm Warning | CYS | Kimball | 25 min |
| Jun 18, 5:17 PM MDT | Tornado Warning | CYS | Cheyenne | 28 min |
| Jun 18, 5:39 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill | 40 min |
| Jun 18, 5:47 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 32 min |
| Jun 18, 3:03 PM MDT | Severe Thunderstorm Warning | CYS | Laramie, Platte | 57 min |
| Jun 18, 4:15 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 60 min |
Nearby
Tornado Warnings in Nebraska, 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.