Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 38, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at May 19, 1998, 7:26 PM MDT for Cheyenne County, Nebraska. It was in force for 44 min. 2 reports 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
- May 19, 1998, 7:26 PM MDT (01:26 UTC)
- Expired
- May 19, 1998, 8:10 PM MDT
- In force
- 44 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 01:30 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 |
|---|---|---|---|
| May 19, 7:43 PM MDT | Hail 0.75 | Sidney, NE | |
| May 19, 7:43 PM MDT | Hail 1.5 | Dalton, NE | A storm produced walnut size hail 10 miles southwest of Dalton. |
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 |
|---|---|---|---|
| May 19, 3:30 PM MDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 1.4 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
- 22 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 3900 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
221 WUUS1 KCYS 200127 RRA SVRCYS NEC033-200210- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 726 PM MDT TUE MAY 19 1998 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CHEYENNE COUNTY IN WESTERN NEBRASKA PANHANDLE * UNTIL 810 PM MDT * AT 723 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES NORTHWEST OF SIDNEY AND 15 WEST OF SIDNEY... MOVING NORTHEAST AT 25 MILES AN HOUR. THE SEVERE THUNDERSTORM 15 MILES WEST OF SIDNEY PRODUCED ONE AND A HALF INCH DIAMETER HAIL AT POTTER 717 PM. * THE SEVERE THUNDERSTORM WILL BE NEAR... GURLEY AT 740 PM GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH... DESTRUCTIVE HAIL... DEADLY LIGHTNING... AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DONT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. PAL
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
Local storm report, May 19, 6:47 PM MDT, 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
647 PM MDT TUE MAY 19 1998
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0255 PM 20 N CHEYENNE WY 1.75 INCH HAIL 05/19/98 LARAMIE
0610 PM MARSLAND NE 1.75 INCH HAIL 05/19/98 DAWES
DAUGHERTY CYSLSRCYS TTAA00 KCYS 200202
PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE CHEYENNE WY 800 PM MDT TUE MAY 19 1998
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0717 PM POTTER NE 1.50 INCH HAIL 05/19/98 CHEYENNE
0743 PM 5 N SIDNEY NE 0.75 INCH HAIL 05/19/98 CHEYENNE
DAUGHERTY CYSLSRCYS TTAA00 KCYS 200406
PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE CHEYENNE WY 1005 PM MDT TUE MAY 19 1998
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0943 PM 10 SW DALTON NE 1.50 INCH HAIL 05/19/98 CHEYENNE
DAUGHERTY
CYSLSRCYS
TTAA00 KCYS 200409
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
1008 PM MDT TUE MAY 19 1998
TIME(MDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1004 PM DALTON NE 1.75 INCH HAIL 05/19/98 CHEYENNE
DAUGHERTYThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 6:09 PM MDT | Severe Thunderstorm Warning | CYS | Dawes | 46 min |
| May 19, 6:27 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 33 min |
| May 19, 6:38 PM MDT | Severe Thunderstorm Warning | CYS | Dawes | 32 min |
| May 19, 6:56 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 29 min |
| May 19, 9:19 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 31 min |
| May 19, 9:39 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 31 min |
| May 20, 4:13 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 32 min |
| May 20, 4:46 PM MDT | Severe Thunderstorm Warning | CYS | Scotts Bluff | 34 min |
| May 20, 5:28 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 32 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 1998Every severe thunderstorm warning 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.