Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 110, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Oct 11, 1997, 6:10 PM MDT for Cheyenne County, Nebraska. It was in force for 45 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
- Oct 11, 1997, 6:10 PM MDT (00:10 UTC)
- Expired
- Oct 11, 1997, 6:55 PM MDT
- In force
- 45 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Cheyenne County, NE
The radar
The Cheyenne radar (KCYS), 152 km from the middle of the area, began a volume at 00:12 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 |
|---|---|---|---|
| Oct 11, 6:45 PM MDT | Thunderstorm Wind 54 | Sidney, NE | Thunderstorm winds of 62 MPH blew the roof off a construction company building at 1746 and deposited the roof 100 yards away. Winds also damaged several business signs, and split a tree truck which then partially blocked a residential street. |
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 |
|---|---|---|---|
| Oct 11, 5:30 PM MDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 0.2 hours before the alert went out and 151 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
- 2617 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
457 WUUS1 KCYS 120013 SVRCYS NEC033-120055- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 610 PM MDT SUN OCT 11 1997 * SEVERE THUNDERSTORM WARNING FOR NORTHEAST AND CENTRAL CHEYENNE COUNTY IN THE NEBRASKA PANHANDLE * UNTIL 655 PM MDT * SOME LOCATIONS AFFECTED SIDNEY AND BROWNSON BY 635 PM GURLEY BY 650 PM * AT 610 PM A SEVERE THUNDERSTORM WAS INDICATED BY RADAR 15 MILES SOUTHWEST OF SIDNEY MOVING NORTHEAST AT 50 MPH. A TORNADO WATCH IS ALSO IN EFFECT. SEVERE THUNDERSTORMS CAN ALSO PRODUCE TORNADOES. STRONG WINDS WITH THIS STORM MAY CAUSE INJURY OR DAMAGE. TAKE SHELTER INSIDE A STURDY BUILDING AWAY FROM ALL DOORS AND WINDOWS.
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 7:05 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 40 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.