Alert archive / Wyoming / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 37, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 18, 1997, 3:45 PM MDT for Laramie County, Wyoming. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 18, 1997, 3:45 PM MDT (21:45 UTC)
- Expired
- Jun 18, 1997, 4:15 PM MDT
- In force
- 30 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Laramie County, WY
The radar
The Cheyenne radar (KCYS), 20 km from the middle of the area, began a volume at 21:45 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 18, 3:15 PM MDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 9.8 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
- 2353 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 100 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 182147 RRA SVRCYS WYC021-182215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 345 PM MDT WED JUN 18 1997 * SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LARAMIE COUNTY IN SOUTHEASTERN WYOMING * UNTIL 415 PM MDT * SOME AFFECTED LOCATIONS INCLUDE CARPENTER 345 PM * AT 345 PM...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER CARPENTER. MOVEMENT WAS EAST AT 20 MPH. THIS STORM IS LIKELY PRODUCING 1 1/2 INCH DIAMETER HAIL. A TORNADO WATCH IS ALSO IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES. THIS IS A DANGEROUS STORM. DO NOT GO OUTDOORS. WCJIN-WYSE DMM
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, Jun 18, 10:05 AM MDT, 5 hours 40 minutes before
WYZ059>070-NEZ001>003-019>021-054-055-190000- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 1005 AM MDT WED JUN 18 1997 THE SEVERE WEATHER POTENTIAL IN THE CHEYENNE NWS COUNTY WARNING AREA
Special weather statement, Jun 18, 3:40 PM MDT, 5 minutes before
WYZ060-068>070-NEZ001>003-019>021-054-055-190300- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 340 PM MDT WED JUN 18 1997 A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR THE NEBRASKA PANHANDLE AND PARTS OF SOUTHEAST WYOMING AND IS VALID UNTIL 9 PM. COUNTIES IN THE PANHANDLE INCLUDE SIOUX...DAWES...BOX BUTTE...MORRILL ...CHEYENNE...SCOTTS BLUFF...BANNER AND KIMBALL. SOME CITIES INCLUDED IN THE PANHANDLE ARE HARRISON...CHADRON...ALLIANCE...BRIDGEPORT... SIDNEY...KIMBALL...AND SCOTTSBLUFF/GERING. COUNTIES IN WYOMING INCLUDED IN THE WATCH ARE GOSHEN...SOUTHERN NIOBRARA AND CENTRAL AND EASTERN LARAMIE COUNTY. SOME CITIES INCLUDED IN SOUTHEAST WYOMING ARE LUSK...TORRINGTON...CHEYENNE AND PINE BLUFFS. A MOIST AND UNSTABLE AIRMASS IS IN PLACE OVER SOUTHEAST WYOMING AND THE NEBRASKA PANHANDLE. AN UPPER LEVEL DISTURBANCE MOVING THROUGH THE AREA THIS AFTERNOON AND EVENING WILL HELP LIFT THIS AIR...PRODUCING STRONG THUNDERSTORMS. SOME OF THESE STORMS COULD PRODUCE LARGE HAIL AND TORNADOES ALONG WITH HEAVY RAIN. THUNDERSTORMS WILL DIMINISH LATER THIS EVENING FROM WEST TO EAST AS THE UPPER LEVEL DISTURBANCE MOVES EAST OF THE AREA. PEOPLE IN THE WATCH AREA SHOULD BE ALERT TO APPROACHING STORMS AND BE PREPARED TO SEEK SHELTER. LISTEN TO NOAA WEATHER RADIO OR YOUR LOCAL TELEVISION AND RADIO STATIONS AS WELL AS YOUR CABLE TELEVISION PROVIDER FOR LATER STATEMENTS AND WARNING. WCJIN-WYNE-WYSE JMH
Special weather statement, Jun 18, 3:42 PM MDT, 3 minutes before
WYZ060-068>070-NEZ001>003-019>021-054-055-190300- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 340 PM MDT WED JUN 18 1997 A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR THE NEBRASKA PANHANDLE AND PARTS OF SOUTHEAST WYOMING AND IS VALID UNTIL 9 PM. COUNTIES IN THE PANHANDLE INCLUDE SIOUX...DAWES...BOX BUTTE...MORRILL ...CHEYENNE...SCOTTS BLUFF...BANNER AND KIMBALL. SOME CITIES INCLUDED IN THE PANHANDLE ARE HARRISON...CHADRON...ALLIANCE...BRIDGEPORT... SIDNEY...KIMBALL...AND SCOTTSBLUFF/GERING. COUNTIES IN WYOMING INCLUDED IN THE WATCH ARE GOSHEN...SOUTHERN NIOBRARA AND CENTRAL AND EASTERN LARAMIE COUNTY. SOME CITIES INCLUDED IN SOUTHEAST WYOMING ARE LUSK...TORRINGTON...CHEYENNE AND PINE BLUFFS. A MOIST AND UNSTABLE AIRMASS IS IN PLACE OVER SOUTHEAST WYOMING AND THE NEBRASKA PANHANDLE. AN UPPER LEVEL DISTURBANCE MOVING THROUGH THE AREA THIS AFTERNOON AND EVENING WILL HELP LIFT THIS AIR...PRODUCING STRONG THUNDERSTORMS. SOME OF THESE STORMS COULD PRODUCE LARGE HAIL AND TORNADOES ALONG WITH HEAVY RAIN. THUNDERSTORMS WILL DIMINISH LATER THIS EVENING FROM WEST TO EAST AS THE UPPER LEVEL DISTURBANCE MOVES EAST OF THE AREA. PEOPLE IN THE WATCH AREA SHOULD BE ALERT TO APPROACHING STORMS AND BE PREPARED TO SEEK SHELTER. LISTEN TO NOAA WEATHER RADIO OR YOUR LOCAL TELEVISION AND RADIO STATIONS AS WELL AS YOUR CABLE TELEVISION PROVIDER FOR LATER STATEMENTS AND WARNING. WCJIN-WYNE-WYSE JMH
Special weather statement, Jun 18, 3:44 PM MDT, 1 minute before
WYZ060-068>070-NEZ001>003-019>021-054-055-190300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 340 PM MDT WED JUN 18 1997 A TORNADO WATCH HAS BEEN ISSUED FOR THE NEBRASKA PANHANDLE AND PARTS OF SOUTHEAST WYOMING AND IS VALID UNTIL 9 PM. COUNTIES IN THE PANHANDLE INCLUDE SIOUX...DAWES...BOX BUTTE...MORRILL ...CHEYENNE...SCOTTS BLUFF...BANNER AND KIMBALL. SOME CITIES INCLUDED IN THE PANHANDLE ARE HARRISON...CHADRON...ALLIANCE...BRIDGEPORT... SIDNEY...KIMBALL...AND SCOTTSBLUFF/GERING. COUNTIES IN WYOMING INCLUDED IN THE WATCH ARE GOSHEN...SOUTHERN NIOBRARA AND CENTRAL AND EASTERN LARAMIE COUNTY. SOME CITIES INCLUDED IN SOUTHEAST WYOMING ARE LUSK...TORRINGTON...CHEYENNE AND PINE BLUFFS. A MOIST AND UNSTABLE AIRMASS IS IN PLACE OVER SOUTHEAST WYOMING AND THE NEBRASKA PANHANDLE. AN UPPER LEVEL DISTURBANCE MOVING THROUGH THE AREA THIS AFTERNOON AND EVENING WILL HELP LIFT THIS AIR...PRODUCING STRONG THUNDERSTORMS. SOME OF THESE STORMS COULD PRODUCE LARGE HAIL AND TORNADOES ALONG WITH HEAVY RAIN. THUNDERSTORMS WILL DIMINISH LATER THIS EVENING FROM WEST TO EAST AS THE UPPER LEVEL DISTURBANCE MOVES EAST OF THE AREA. PEOPLE IN THE WATCH AREA SHOULD BE ALERT TO APPROACHING STORMS AND BE PREPARED TO SEEK SHELTER. LISTEN TO NOAA WEATHER RADIO OR YOUR LOCAL TELEVISION AND RADIO STATIONS AS WELL AS YOUR CABLE TELEVISION PROVIDER FOR LATER STATEMENTS AND WARNING. WCJIN-WYNE-WYSE JMH
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 2:03 PM MDT | Tornado Warning | CYS | Laramie | 32 min |
| Jun 18, 2:38 PM MDT | Tornado Warning | CYS | Laramie | 32 min |
| Jun 18, 2:59 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 46 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 1997Every severe thunderstorm warning in 1997
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; radar from the NEXRAD Level II archive.