Alert archive / Nebraska / Tornado Warnings in 1998
Tornado Warning 5, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at May 20, 1998, 6:59 PM MDT for Morrill County, Nebraska. It was in force for 31 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
- May 20, 1998, 6:59 PM MDT (00:59 UTC)
- Expired
- May 20, 1998, 7:30 PM MDT
- In force
- 31 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 01:00 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 20, 1:30 PM MDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 1.0 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
- 87 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 3075 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -42 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
722 WFUS1 KCYS 210101 RRA TORCYS NEC123-210130- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 659 PM MDT WED MAY 20 1998 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN MORRILL COUNTY IN WESTERN NEBRASKA PANHANDLE * UNTIL 730 PM MDT * AT 658 PM MDT... AREA LAW ENFORCEMENT INDICATED A TORNADO 11 MILES SOUTH SOUTHEAST OF BRIDGEPORT... MOVING SOUTHEAST AT 15 MPH. THIS STORM ALSO PRODUCED GOLF BALL TO BASEBALL SIZE HAIL IN THE REDINGTON AREA. * THE TORNADO IS EXPECTED TO... CROSS HIGHWAY 385 JUST NORTH OF THE MORRILL COUNTY BORDER AT 715 PM. THIS TORNADO WARNING REPLACES THE PREVIOUS TORNADO WARNING FOR WESTERN MORRILL COUNTY. GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR DO NOT USE YOUR CAR TO OUTRUN A TORNADO. CARS ARE EASILY TOSSED AROUND BY TORNADIC WINDS. IF YOU ARE CAUGHT IN THE PATH OF A TORNADO... LEAVE THE CAR AND GO TO A STRONG BUILDING. IF NO STRUCTURE IS NEARBY...SEEK SAFETY IN A DITCH OR LOW SPOT. BE MINDFUL OF RISING WATERS. PAL
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 6:10 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 30 min |
| May 20, 6:29 PM MDT | Tornado Warning | CYS | Morrill | 31 min |
| May 20, 7:39 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 31 min |
| May 20, 7:54 PM MDT | Tornado Warning | CYS | Cheyenne | 31 min |
| May 20, 8:49 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 31 min |
| May 21, 4:57 AM MDT | Severe Thunderstorm Warning | CYS | Box Butte | 48 min |
| May 21, 5:48 AM MDT | Severe Thunderstorm Warning | CYS | Box Butte | 37 min |
| May 21, 10:55 AM MDT | Tornado Warning | CYS | Scotts Bluff, Sioux | 30 min |
| May 21, 11:30 AM MDT | Tornado Warning | CYS | Scotts Bluff | 35 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.