Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 172, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Sep 16, 1997, 12:46 AM CDT for Sheridan County, North Dakota. It was in force for 29 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
- Sep 16, 1997, 12:46 AM CDT (05:46 UTC)
- Expired
- Sep 16, 1997, 1:15 AM CDT
- In force
- 29 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
County Sheridan County, ND
The radar
The Bismarck radar (KBIS), 95 km from the middle of the area, began a volume at 05:49 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 |
|---|---|---|---|
| Sep 15, 11:00 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 5.8 hours before the alert went out and 93 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
- 353 J/kg
- Mixed-layer CIN
- -297 J/kg
- Mixed-layer LCL
- 1197 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 282 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 10:34 PM CDT | Severe Thunderstorm Warning | BIS | Adams, Hettinger | 41 min |
| Sep 15, 11:36 PM CDT | Severe Thunderstorm Warning | BIS | McLean, Ward | 69 min |
| Sep 16, 12:13 AM CDT | Severe Thunderstorm Warning | BIS | Burleigh, Morton | 47 min |
| Sep 16, 12:54 AM CDT | Severe Thunderstorm Warning | BIS | Burleigh, Kidder | 66 min |
| Sep 16, 1:14 AM CDT | Severe Thunderstorm Warning | BIS | Pierce, Wells | 46 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.