Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 58, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Jun 30, 1997, 1:48 AM MDT for Bowman County, North Dakota. It was in force for 42 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 30, 1997, 1:48 AM MDT (07:48 UTC)
- Expired
- Jun 30, 1997, 2:30 AM MDT
- In force
- 42 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
County Bowman County, ND
The radar
The Bismarck radar (KBIS), 224 km from the middle of the area, began a volume at 07:49 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 30, 2:10 AM MDT | Hail 0.75 | Haley Dam, ND | The hail left a swath 1/2 mile wide and 1 mile long |
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
Bismarck Municip, ND (KBIS), launched 00:00Z, 7.8 hours before the alert went out and 228 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
- 419 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 1495 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 247 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.5
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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
Special weather statement, Jun 30, 1:15 AM MDT, 33 minutes before
NDZ043-300815- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 215 AM CDT MON JUN 30 1997 ...STRONG THUNDERSTORMS MOVING INTO BOWMAN COUNTY... AT 110 AM MDT WEATHER RADAR INDICATED A STRONG THUNDERSTORM MOVING INTO EXTREME SOUTHWEST BOWMAN COUNTY. THE STORM WAS MOVING EAST...NORTHEAST AT 30 MPH. THE STORM WILL AFFECT THE SOUTHERN AREAS OF BOWMAN COUNTY... INCLUDING THE BOWMAN HALEY DAM. THIS STORM WILL PRODUCE GUSTY WINDS TO NEAR 45 MPH...BRIEF HEAVY RAIN AND SMALL HAIL. RGT
Special weather statement, Jun 30, 1:19 AM MDT, 29 minutes before
NDZ043-300815- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 215 AM CDT MON JUN 30 1997 ...STRONG THUNDERSTORMS MOVING INTO BOWMAN COUNTY... AT 110 AM MDT WEATHER RADAR INDICATED A STRONG THUNDERSTORM MOVING INTO EXTREME SOUTHWEST BOWMAN COUNTY. THE STORM WAS MOVING EAST...NORTHEAST AT 30 MPH. THE STORM WILL AFFECT THE SOUTHERN AREAS OF BOWMAN COUNTY... INCLUDING THE BOWMAN HALEY DAM. THIS STORM WILL PRODUCE GUSTY WINDS TO NEAR 45 MPH...BRIEF HEAVY RAIN AND SMALL HAIL. RGT
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 6:33 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie | 57 min |
| Jun 29, 7:28 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie | 62 min |
| Jun 29, 8:36 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie | 69 min |
| Jun 30, 2:33 AM MDT | Severe Thunderstorm Warning | BIS | Adams | 57 min |
| Jun 30, 3:32 AM MDT | Severe Thunderstorm Warning | BIS | Grant, Hettinger, Sioux | 58 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.