Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 84, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 12, 1997, 7:11 PM MDT for Box Butte County, Nebraska. It was in force for 44 min. 1 report 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
- Jul 12, 1997, 7:11 PM MDT (01:11 UTC)
- Expired
- Jul 12, 1997, 7:55 PM MDT
- In force
- 44 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Box Butte County, NE
The radar
The Cheyenne radar (KCYS), 186 km from the middle of the area, began a volume at 01:14 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 12, 7:45 PM MDT | Thunderstorm Wind 65 | Alliance, NE | Roofs torn off 1 mobile home and 1 apartment complex; at least 2 cars damaged by fallen limbs; power lines downed; 1 camper flipped; trees uprooted; 3' diameter maple tree thrown onto roof of house; 6' wooden fence downed. |
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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 12, 2:00 PM MDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 1.2 hours before the alert went out and 206 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
- 536 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 1632 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 130 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCYS 130111 RRA SVRCYS NEC013-130155- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 711 PM MDT SAT JUL 12 1997 * SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BOX BUTTE COUNTY IN NORTHWESTERN NEBRASKA PANHANDLE * UNTIL 755 PM MDT * SOME LOCATIONS AFFECTED ALLIANCE BY 730 PM MDT BEREA BY 740 PM MDT * AT 708 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER RADAR 9 MILES SOUTHWEST OF ALLIANCE MOVING NORTHEAST AT 15 MPH. A TORNADO WATCH IS ALSO IN EFFECT UNTIL 715 PM MDT. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES. AT 708 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERS TORM 8 MILES SOUTHWEST OF ALLIANCE. THE STORM WAS MOVING NORTHEAST AROUND 15 MPH. LARGE HAIL IS LIKELY WITH THIS STORM. SEEK SHELTER INSIDE A STURDY BUILDING AWAY FROM ALL WINDOWS UNTIL THE STORM PASSES. JLH
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, Jul 12, 2:00 PM MDT, 5 hours 11 minutes before
WYZ059-060-067-068-NEZ001>003-019>021-130200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 200 PM MDT SAT JUL 12 1997 ...A TORNADO WATCH HAS BEEN ISSUED FOR MUCH OF EAST CENTRAL AND SOUTHEAST WYOMING AND THE NEBRASKA PANHANDLE... THE TORNADO WATCH IS IN EFFECT UNTIL 8 PM MDT THIS SATURDAY EVENING AND INCLUDES THE FOLLOWING COUNTIES. IN EAST CENTRAL AND SOUTHEAST WYOMING...CONVERSE...NIOBRARA...PLATTE AND GOSHEN COUNTIES INCLUDING THE CITIES OF DOUGLAS...LUSK...WHEATLAND AND TORRINGTON. COUNTIES IN THE PANHANDLE IN THE WATCH ARE SIOUX...DAWES...SCOTTS BLUFF ...BANNER...BOX BUTTE AND MORRILL INCLUDING THE CITIES OF HARRISON... CHADRON...ALLIANCE...SCOTTSBLUFF...BRIDGEPORT AND HARRISBURG. A MOIST AND UNSTABLE ATMOSHPHERE IS IN PLACE OVER MUCH OF EASTERN WYOMING AND THE NEBRASKA PANHANDLE. A STRONG LOW PRESSURE SYSTEM APPROACHING FROM THE WEST WILL CAUSE THIS AIR TO LIFT AND FORM STRONG THUNDERSTORMS. SOME OF THESE STORMS WILL BECOME VERY STRONG AND PRODUCE LARGE HAIL...DAMAGING WINDS AND EVEN TORNADOES THIS AFTERNOON AND EVENING. PEOPLE IN THE WATCH AREA SHOULD BE ALERT TO APPROACHING STORMS AND BE PREPARED TO SEEK SHELTER IN AN INTERIOR ROOM OF A STURDY BUILDING. LISTEN TO NOAA WEATHER RADIO OR LOCAL RADIO AND TELEVISION STATIONS FOR LATER STATMENTS AND WARNINGS. WCJIN-WYNE-WYSE JMH
Special weather statement, Jul 12, 6:00 PM MDT, 1 hour 11 minutes before
WYZ054>060-067-068-NEZ001>003-019>021-130200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 600 PM MDT SAT JUL 12 1997 ...THE TORNADO WATCH HAS BEEN CANCELLED FOR EASTERN WYOMING AND FAR WEST PARTS OF THE NEBRASKA PANHANDLE... THE TORNADO WATCH HAS BEEN CANCELLED FOR EASTERN WYOMING AND FAR WEST PARTS OF THE NEBRASKA PANHANDLE. THE TORNADO WATCH REMAINS IN EFFECT FOR DAWES...BOX BUTTE AND MORRILL COUNTIES OF NEBRASKA UNTIL 8 PM MDT THIS SATURDAY EVENING. THE TORNADO WATCH STILL INCLUDES THE CITIES OF CHADRON...ALLIANCE... AND BRIDGEPORT. AT 600 PM MDT THUNDERSTORMS CONTINUED IN DAWES...BOX BUTTE AND MORRILL COUNTIES OF NEBRASKA. OVER EASTERN WYOMING AND FAR WEST PARTS OF THE NEBRASKA PANHANDLE...THUNDERSTORMS WERE DECREASING AND ARE NO LONGER EXPECTED TO STRENGTHEN. PEOPLE IN THE WATCH AREA SHOULD BE ALERT TO APPROACHING STORMS AND BE PREPARED TO SEEK SHELTER IN AN INTERIOR ROOM OF A STURDY BUILDING. LISTEN TO NOAA WEATHER RADIO OR LOCAL RADIO AND TELEVISION STATIONS FOR LATER STATEMENTS AND WARNINGS. WCJIN-WYNE-WYSE BAKER
Special weather statement, Jul 12, 6:03 PM MDT, 1 hour 8 minutes before
WYZ054>060-067-068-NEZ001>003-019>021-130200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 600 PM MDT SAT JUL 12 1997 ...THE TORNADO WATCH HAS BEEN CANCELLED FOR EASTERN WYOMING AND FAR WEST PARTS OF THE NEBRASKA PANHANDLE... THE TORNADO WATCH HAS BEEN CANCELLED FOR EASTERN WYOMING AND FAR WEST PARTS OF THE NEBRASKA PANHANDLE. THE TORNADO WATCH REMAINS IN EFFECT FOR DAWES...BOX BUTTE AND MORRILL COUNTIES OF NEBRASKA UNTIL 8 PM MDT THIS SATURDAY EVENING. THE TORNADO WATCH STILL INCLUDES THE CITIES OF CHADRON...ALLIANCE... AND BRIDGEPORT. AT 600 PM MDT THUNDERSTORMS CONTINUED IN DAWES...BOX BUTTE AND MORRILL COUNTIES OF NEBRASKA. OVER EASTERN WYOMING AND FAR WEST PARTS OF THE NEBRASKA PANHANDLE...THUNDERSTORMS WERE DECREASING AND ARE NO LONGER EXPECTED TO STRENGTHEN. PEOPLE IN THE WATCH AREA SHOULD BE ALERT TO APPROACHING STORMS AND BE PREPARED TO SEEK SHELTER IN AN INTERIOR ROOM OF A STURDY BUILDING.L LISTEN TO NOAA WEATHER RADIO OR LOCAL RADIO AND TELEVISION STATIONS FOR LATER STATEMENTS AND WARNINGS. WCJIN-WYNE-WYSE BAKER
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.