Alert archive / Wyoming / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 43, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at May 19, 1991, 5:44 PM MDT for Goshen County, Laramie County, Wyoming. It was in force for 61 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 19, 1991, 5:44 PM MDT (23:44 UTC)
- Expired
- May 19, 1991, 6:45 PM MDT
- In force
- 61 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
Counties Goshen County, WY, Laramie County, WY
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 19, 5:45 PM MDT | Thunderstorm Wind 0 | Laramie, WY | |
| May 19, 6:11 PM MDT | Thunderstorm Wind 0 | Laramie, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 11.7 hours before the alert went out and 230 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
- 152 J/kg
- Mixed-layer CIN
- -330 J/kg
- Mixed-layer LCL
- 1662 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 severe thunderstorm 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, May 19, 5:03 PM MDT, 41 minutes before
WYZ006-011-012-017-200000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 505 PM MDT SUN MAY 19 1991 ...A TORNADO WATCH HAS BEEN POSTED FOR NORTHEAST AND EAST CENTRAL WYOMING UNTIL 11 PM...WITH A SEVERE THUNDERSTORM WATCH UNTIL 11 PM IN THE FAR SOUTHEAST... CONDITIONS ONCE AGAIN WERE RIPE FOR SEVERE THUNDERSTORMS OVER MUCH OF EASTERN WYOMING LATE THIS SUNDAY AFTERNOON INTO THIS EVENING. HAIL... STRONG DAMAGING WINDS...AND qPOSSIBLY EVEN A TORNADO COULD OCCUR WITH A FEW OF THE STORMS. PEOPLE IN EASTERN WYOMING SHOULD BE ALERT TO THE WEATHER CONDITIONS IN YOUR AREA...AND MONITOR THIS RADIO STATION FOR FURTHER INFORMATION AND POSSIBLE WARNINGS. JAD
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 7:30 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 45 min |
| May 18, 8:11 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 49 min |
| May 19, 4:59 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 61 min |
| May 19, 5:15 PM MDT | Tornado Warning | CYS | Laramie | 30 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 1991Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.