Alert archive / Wyoming / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 55, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 20, 1997, 8:13 PM MDT for Niobrara County, Wyoming. It was in force for 47 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 20, 1997, 8:13 PM MDT (02:13 UTC)
- Expired
- Jun 20, 1997, 9:00 PM MDT
- In force
- 47 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Niobrara County, WY
The radar
The Rapid City radar (KUDX), 178 km from the middle of the area, began a volume at 02:15 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 nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 2.2 hours before the alert went out and 171 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
- 63 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 785 m above ground
- 0-6 km bulk shear
- 85 kt
- 0-1 km storm-relative helicity
- 204 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCYS 210213 RRA SVRCYS WYC027-210300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 813 PM MDT FRI JUN 20 1997 * SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN NIOBRARA COUNTY IN EASTERN WYOMING * UNTIL 900 PM MDT * SOME LOCATIONS AFFECTED BETWEEN LUSK AND VAN TASSEL BETWEEN 820 AND 840 PM. * AT 811 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER RADAR 12 MILES SOUTH OF LUSK OR 10 MILES SOUTHWEST OF NODE MOVING NORTHEAST AT 25 MPH. ONE INCH DIAMETER HAIL FELL 10 MILES EAST OF JAY EM WITH THIS STORM IN GOSHEN COUNTY. A TORNADO WATCH IS ALSO IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES. LARGE HAIL IS LIKELY WITH THIS STORM. SEEK SHELTER INSIDE A STURDY BUILDING AWAY FROM ALL WINDOWS UNTIL THE STORM PASSES. WCJIN-WYNE- WEILAND
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 20, 2:29 PM MDT, 5 hours 44 minutes before
WYZ060-068-NEZ001>003-019>021-054-055-210300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 230 PM MDT FRI JUN 20 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 WATCH ARE HARRISON...CHADRON...ALLIANCE...BRIDGEPORT...SIDNEY ...KIMBALL...HARRISBURG...AND SCOTTSBLUFF/GERING. COUNTIES IN WYOMING INCLUDED IN THE WATCH ARE GOSHEN...AND SOUTHERN NIOBRARA. SOME CITIES AND TOWNS IN THE WATCH ARE LUSK...AND TORRINGTON. A MOIST AND UNSTABLE AIRMASS IS IN PLACE OVER SOUTHEAST WYOMING AND THE NEBRASKA PANHANDLE. AN UPPER LEVEL DISTURBANCE MOVING THROUGH THE AREA WILL RESULT IN SOME STRONG THUNDERSTORMS. SOME OF THESE STORMS COULD COULD PRODUCE LARGE HAIL AND TORNADOES ALONG WITH HEAVY RAIN. 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 LRE
Special weather statement, Jun 20, 2:30 PM MDT, 5 hours 43 minutes before
WYZ060-068-NEZ001>003-019>021-054-055-210300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 230 PM MDT FRI JUN 20 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 WATCH ARE HARRISON...CHADRON...ALLIANCE...BRIDGEPORT...SIDNEY ...KIMBALL...HARRISBURG...AND SCOTTSBLUFF/GERING. COUNTIES IN WYOMING INCLUDED IN THE WATCH ARE GOSHEN...AND SOUTHERN NIOBRARA. SOME CITIES AND TOWNS IN THE WATCH ARE LUSK...AND TORRINGTON. A MOIST AND UNSTABLE AIRMASS IS IN PLACE OVER SOUTHEAST WYOMING AND THE NEBRASKA PANHANDLE. AN UPPER LEVEL DISTURBANCE MOVING THROUGH THE AREA WILL RESULT IN SOME STRONG THUNDERSTORMS. SOME OF THESE STORMS COULD COULD PRODUCE LARGE HAIL AND TORNADOES ALONG WITH HEAVY RAIN. 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 LRE
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 7:03 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 47 min |
| Jun 20, 7:17 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 48 min |
| Jun 20, 8:03 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 17 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.