Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 73, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Jul 10, 1997, 7:51 PM MDT for Morton County, North Dakota. It was in force for 54 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
- Jul 10, 1997, 7:51 PM MDT (01:51 UTC)
- Expired
- Jul 10, 1997, 8:45 PM MDT
- In force
- 54 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
County Morton County, ND
The radar
The Bismarck radar (KBIS), 40 km from the middle of the area, began a volume at 01:52 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 |
|---|---|---|---|
| Jul 10, 7:55 PM MDT | Thunderstorm Wind 52 | Hebron, ND | Wind occurred at ranch 5 NE Hebron. Numerous trees downed at ranch. |
| Jul 10, 8:25 PM MDT | Thunderstorm Wind 60 | Mandan, ND | Tree fell on house, causing considerable roof and siding damage. |
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 |
|---|---|---|---|
| Jul 10, 6:45 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 1.9 hours before the alert went out and 45 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
- 4434 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1269 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 176 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBIS 110151 SVRBIS NDC059-110245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BISMARCK ND 851 PM CDT THU JUL 10 1997 THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 945 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN CENTRAL NORTH DAKOTA ...WESTERN MORTON COUNTY AT 845 PM CDT (745 PM MDT) RADAR INDICATED A SEVERE THUNDERSTORM 62 MILES WEST OF BISMARCK BETWEEN THE TOWNS OF RICHARDTON AND HEBRON ON INTERSTATE I-94. THE STORM IS MOVING NORTHEAST AT 25 MPH. ANOTHER LINE OF THUNDERSTORMS IS ENTERING WESTERN MORTON COUNTY FROM NORTHERN GRANT COUNTY. THIS LINE EXTENDS FROM 55 MILES WEST OF BISMARCK SOUTH OF GLEN ULLIN TO 40 MILES SOUTHWEST OF BISMARCK SOUTH OF ALMONT. TOWNS IN OR NEAR THE PATH OF THESE STORMS INCLUDE GLEN ULLIN...HEBRON AND ALMONT. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS. HINTZ
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 6:11 PM MDT | Severe Thunderstorm Warning | BIS | Dunn | 64 min |
| Jul 10, 6:45 PM MDT | Severe Thunderstorm Warning | BIS | Burke, Mountrail | 60 min |
| Jul 10, 7:00 PM MDT | Severe Thunderstorm Warning | BIS | McLean, Mercer | 60 min |
| Jul 10, 7:25 PM MDT | Severe Thunderstorm Warning | BIS | Grant, Sioux | 65 min |
| Jul 10, 7:41 PM MDT | Tornado Warning | BIS | Mercer | 34 min |
| Jul 10, 7:52 PM MDT | Severe Thunderstorm Warning | BIS | Mountrail, Ward | 68 min |
| Jul 10, 8:09 PM MDT | Severe Thunderstorm Warning | BIS | Bottineau, Renville | 66 min |
| Jul 10, 8:15 PM MDT | Tornado Warning | BIS | Ward | 30 min |
| Jul 10, 8:25 PM MDT | Severe Thunderstorm Warning | BIS | Burleigh, Morton | 65 min |
| Jul 10, 8:49 PM MDT | Severe Thunderstorm Warning | BIS | Bottineau, McHenry | 56 min |
| Jul 10, 8:51 PM MDT | Severe Thunderstorm Warning | BIS | McLean, Mercer | 69 min |
| Jul 10, 8:57 PM MDT | Tornado Warning | BIS | McHenry | 33 min |
| Jul 10, 9:10 PM MDT | Severe Thunderstorm Warning | BIS | Sioux | 50 min |
| Jul 10, 9:50 PM MDT | Severe Thunderstorm Warning | BIS | McHenry, Pierce | 40 min |
| Jul 10, 9:50 PM MDT | Severe Thunderstorm Warning | BIS | Emmons | 40 min |
| Jul 10, 10:29 PM MDT | Severe Thunderstorm Warning | BIS | Pierce, Rolette | 46 min |
| Jul 10, 11:01 PM MDT | Severe Thunderstorm Warning | BIS | Stutsman | 44 min |
| Jul 11, 3:31 PM MDT | Severe Thunderstorm Warning | BIS | Renville, Ward | 44 min |
| Jul 11, 3:54 PM MDT | Severe Thunderstorm Warning | BIS | Burke | 66 min |
| Jul 11, 5:23 PM MDT | Severe Thunderstorm Warning | BIS | McLean, Oliver | 67 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.