Alert archive / Nebraska / Tornado Warnings in 1998
Tornado Warning 17, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Jun 23, 1998, 5:37 PM MDT for Morrill County, Nebraska. It was in force for 33 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
- Jun 23, 1998, 5:37 PM MDT (23:37 UTC)
- Expired
- Jun 23, 1998, 6:10 PM MDT
- In force
- 33 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Morrill County, NE
The radar
The Cheyenne radar (KCYS), 162 km from the middle of the area, began a volume at 23:38 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 |
|---|---|---|---|
| Jun 23, 6:00 PM MDT | Hail 1.75 | Broadwater, NE | A storm produced golf ball size hail 5 miles north of Broadwater. |
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 nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 11.6 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
- 721 J/kg
- Mixed-layer CIN
- -136 J/kg
- Mixed-layer LCL
- 1083 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- -77 m²/s²
- 0-3 km storm-relative helicity
- -24 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -1.8
The text
As transmitted, in the capitals the NWS used until 2016.
500 WFUS1 KCYS 232336 RRA TORCYS NEC123-240010- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 537 PM MDT TUE JUN 23 1998 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A * TORNADO WARNING FOR... EASTERN MORRILL COUNTY IN THE NEBRASKA PANHANDLE * UNTIL 610 PM MDT * AT 533 PM MDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO 6 MILES EAST OF BRIDGEPORT ... MOVING EAST AT 15 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... ONLY OPEN COUNTRY THIS TORNADO WARNING REPLACES THE PREVIOUS SEVERE THUNDERSTOM WARNING FOR EASTERN MORRILL COUNTY WHICH WAS TO EXPIRE AT 535 PM. IF YOU ARE IN A CAR...GO IN A NEARBY STURDY BUILDING AS A LAST RESORT LIE FLAT IN A DITCH AND COVER YOUR HEAD. PAL
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 7:08 PM MDT | Tornado Warning | CYS | Scotts Bluff, Sioux | 17 min |
| Jun 22, 7:29 PM MDT | Tornado Warning | CYS | Scotts Bluff, Sioux | 36 min |
| Jun 22, 8:08 PM MDT | Severe Thunderstorm Warning | CYS | Scotts Bluff, Sioux | 32 min |
| Jun 22, 8:27 PM MDT | Tornado Warning | CYS | Box Butte, Morrill | 18 min |
| Jun 22, 8:40 PM MDT | Severe Thunderstorm Warning | CYS | Scotts Bluff, Sioux | 30 min |
| Jun 23, 4:46 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 49 min |
Nearby
Tornado Warnings in Nebraska, 1998Every tornado warning in 1998Tornadoes in 1998
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.