Alert archive / North Dakota / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 6, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at May 17, 1998, 4:35 PM CDT for Ward County, North Dakota. It was in force for 50 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
- May 17, 1998, 4:35 PM CDT (21:35 UTC)
- Expired
- May 17, 1998, 5:25 PM CDT
- In force
- 50 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
County Ward County, ND
The radar
The Minot AFB radar (KMBX), 54 km from the middle of the area, began a volume at 21:38 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 |
|---|---|---|---|
| May 17, 5:18 PM CDT | Tornado F0 | Carpio, ND | Brief touch down reported by deputy. |
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 17, 4:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 9.6 hours before the alert went out and 173 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
- 95 J/kg
- Mixed-layer CIN
- -466 J/kg
- Mixed-layer LCL
- 1493 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 194 m²/s²
- 0-3 km storm-relative helicity
- 221 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
890 WUUS1 KBIS 172138 RRA SVRBIS NDC101-172225- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BISMARCK ND 435 PM CDT SUN MAY 17 1998 THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME NORTHWESTERN WARD COUNTY IN NORTH CENTRAL NORTH DAKOTA * UNTIL 525 PM CDT * AT 435 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 35 MILES NORTHWEST OF MINOT...OR 5 MILES SOUTHWEST OF COULEE... MOVING NORTH AT 18 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... COULEE AT 450 PM CDT KENMARE AT 510 PM CDT DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS JP MARTIN
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 5:08 PM CDT | Tornado Warning | BIS | Ward | 32 min |
| May 17, 5:24 PM CDT | Tornado Warning | BIS | Renville | 46 min |
| May 17, 6:02 PM CDT | Severe Thunderstorm Warning | BIS | Ward | 63 min |
| May 17, 6:14 PM CDT | Tornado Warning | BIS | Bottineau, Renville | 61 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 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.