Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 63, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 23, 1997, 10:08 PM MDT for Sioux County, Nebraska. It was in force for 52 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 23, 1997, 10:08 PM MDT (04:08 UTC)
- Expired
- Jun 23, 1997, 11:00 PM MDT
- In force
- 52 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Sioux County, NE
The radar
The Cheyenne radar (KCYS), 172 km from the middle of the area, began a volume at 04:10 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, 4.1 hours before the alert went out and 190 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
- 1237 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 1289 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCYS 240407 RRA SVRCYS NEC165-240455- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 1008 PM MDT MON JUN 23 1997 * SEVERE THUNDERSTORM WARNING FOR CENTRAL SIOUX COUNTY IN NORTHWESTERN NEBRASKA PANHANDLE * UNTIL 1100 PM MDT * SOME LOCATIONS AFFECTED AGATE FOSSILE BEDS BY 1007 PM MDT AGATE BY 1017 PM MDT * AT 1006 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER RADAR 26 MILES NORTHEAST OF TORRINGTON OR 3 MILES SOUTH OF AGATE FOSSILE BEDS MOVING EAST AT 25 MPH. LARGE HAIL IS LIKELY WITH THIS STORM. SEEK SHELTER INSIDE A STURDY BUILDING AWAY FROM ALL WINDOWS UNTIL THE STORM PXASSES. JMH
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 23, 7:58 PM MDT, 2 hours 10 minutes before
WYZ067-068-240300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 758 PM MDT MON JUN 23 1997 ...A STRONG THUNDERSTORM WAS LOCATED IN FAR NORTHEAST PLATTE COUNTY AT 755 PM... THE STORM WAS ABOUT 15 MILES NORTH OF GUERNSEY...OR ABOUT 25 MILES SOUTHWEST OF LUSK. IT WAS MOVING NORTHEAST AT 10 TO 15 MPH...AND WILL BE MOVING ACROSS THE NORTHWEST CORNER OF GOSHEN COUNTY THROUGH 9 PM. MARBLE SIZE HAIL OR LARGER ALONG WITH HEAVY RAIN ARE LIKELY WITH THIS STORM. PEOPLE IN NORTHEAST PLATTE AND NORTHWEST GOSHEN COUNTIES SHOULD BE ON THE LOOKOUT FOR THIS STORM THROUGH 9 PM. SINCE IT IS MOVING RATHER SLOWLY...SOME LOCALIZED FLOODING COULD OCCUR IN THE HILLS NORTH OF THE TOWNS OF SUNRISE AND HARTVILLE ALONG HIGHWAY 270. WCJIN-WYSE JAD
Special weather statement, Jun 23, 7:59 PM MDT, 2 hours 9 minutes before
WYZ067-068-240300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 758 PM MDT MON JUN 23 1997 ...A STRONG THUNDERSTORM WAS LOCATED IN FAR NORTHEAST PLATTE COUNTY AT 755 PM... THE STORM WAS ABOUT 15 MILES NORTH OF GUERNSEY...OR ABOUT 25 MILES SOUTHWEST OF LUSK. IT WAS MOVING NORTHEAST AT 10 TO 15 MPH...AND WILL BE MOVING ACROSS THE NORTHWEST CORNER OF GOSHEN COUNTY THROUGH 9 PM. MARBLE SIZE HAIL OR LARGER ALONG WITH HEAVY RAIN ARE LIKELY WITH THIS STORM. PEOPLE IN NORTHEAST PLATTE AND NORTHWEST GOSHEN COUNTIES SHOULD BE ON THE LOOKOUT FOR THIS STORM THROUGH 9 PM. SINCE IT IS MOVING RATHER SLOWLY...SOME LOCALIZED FLOODING COULD OCCUR IN THE HILLS NORTH OF THE TOWNS OF6 SUNRISE AND HARTVILLE ALONG HIGHWAY 270. WCJIN-WYSE JAD
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 11:15 PM MDT | Severe Thunderstorm Warning | CYS | Dawes | 45 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 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.