Alert archive / North Dakota / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 1, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at May 11, 2025, 8:25 PM MDT for Adams County, Grant County, Hettinger County, North Dakota. It was in force for 50 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
- May 11, 2025, 8:25 PM MDT (02:25 UTC)
- Expired
- May 11, 2025, 9:15 PM MDT
- In force
- 50 min
- Issued by
- NWS Bismarck, ND
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Adams County, ND, Grant County, ND, Hettinger County, ND
The radar
The Bismarck radar (KBIS), 123 km from the middle of the area, began a volume at 02:27 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 |
|---|---|---|---|
| May 11, 4:28 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 2.4 hours before the alert went out and 127 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
- 488 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 3685 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
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.
NWS Bismarck, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at May 11, 5:44 PM MDT, 2 hours 41 minutes earlier.
Area forecast discussion, May 11, 5:44 PM MDT, 2 hours 41 minutes before
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</html>Hazardous weather outlook, May 11, 5:35 PM MDT, 2 hours 50 minutes before
Hazardous Weather Outlook National Weather Service Bismarck ND 635 PM CDT Sun May 11 2025 NDZ001>004-009>011-019-020-122345- Divide-Burke-Renville-Bottineau-Williams-Mountrail-Ward-Mercer- Oliver- 635 PM CDT Sun May 11 2025 /535 PM MDT Sun May 11 2025/ This Hazardous Weather Outlook is for portions of north central North Dakota, northwest North Dakota, and south central North Dakota. .DAY ONE...Tonight Near-critical fire weather conditions are possible this afternoon and into the evening. Isolated thunderstorms are possible this evening. A few storms could become strong to severe with wind gusts to 60 mph being the main threat. .DAYS TWO THROUGH SEVEN...Monday through Saturday Near-critical fire weather conditions are possible again during the daytime on Monday and Tuesday. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. NDZ005-012-013-021-034-042-122345- Rolette-McHenry-Pierce-McLean-Morton-Grant- 635 PM CDT Sun May 11 2025 /535 PM MDT Sun May 11 2025/ This Hazardous Weather Outlook is for portions of north central North Dakota and south central North Dakota. .DAY ONE...Tonight A Red Flag Warning is in effect through this evening. See weather.gov/bis for details. Isolated thunderstorms possible this evening, with gusty winds being the main threat. .DAYS TWO THROUGH SEVEN...Monday through Saturday Near-critical to critical fire weather conditions are possible again during the daytime hours on Monday and Tuesday. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. NDZ022-023-025-035>037-045>048-050-051-122345- Sheridan-Wells-Foster-Burleigh-Kidder-Stutsman-Sioux-Emmons-Logan- La Moure-McIntosh-Dickey- 635 PM CDT Sun May 11 2025 /535 PM MDT Sun May 11 2025/ This Hazardous Weather Outlook is for portions of south central North Dakota and southeast North Dakota. .DAY ONE...Tonight A Red Flag Warning is in effect this afternoon, through Monday evening. See weather.gov/bis for details. An isolated thunderstorm is possible this evening with gusty winds being the main threat. .DAYS TWO THROUGH SEVEN...Monday through Saturday A Red Flag Warning is in effect through Monday evening. Near-critical to critical fire weather conditions are possible again during the daytime hours on Tuesday. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. NDZ017-018-031>033-040-041-043-044-122345- McKenzie-Dunn-Golden Valley-Billings-Stark-Slope-Hettinger-Bowman- Adams- 635 PM CDT Sun May 11 2025 /535 PM MDT Sun May 11 2025/ This Hazardous Weather Outlook is for portions of northwest North Dakota and southwest North Dakota. .DAY ONE...Tonight Near-critical fire weather conditions are possible this afternoon and into the evening. Isolated thunderstorms are possible this evening. A few storms could become strong to severe with wind gusts to 70 mph being the main threat. .DAYS TWO THROUGH SEVEN...Monday through Saturday Near-critical fire weather conditions are possible again during the daytime on Monday and Tuesday. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report strong wind gusts from any thunderstorm.
In the hours before
Special weather statement, May 11, 6:17 PM MDT, 2 hours 8 minutes before
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</html>Local storm report, May 11, 6:34 PM MDT, 1 hour 51 minutes before
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</html>Local storm report, May 11, 6:46 PM MDT, 1 hour 39 minutes before
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</html>The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 6:17 PM MDT | Special Weather Statement | BIS | Bottineau | 43 min |
| May 11, 7:06 PM MDT | Special Weather Statement | BIS | Rolette | 39 min |
| May 11, 8:46 PM MDT | Special Weather Statement | BIS | Sioux | 44 min |
| May 11, 9:08 PM MDT | Special Weather Statement | BIS | McKenzie | 52 min |
| May 11, 9:09 PM MDT | Special Weather Statement | BIS | Billings | 51 min |
| May 11, 9:18 PM MDT | Special Weather Statement | BIS | Grant | 42 min |
| May 11, 9:22 PM MDT | Special Weather Statement | BIS | Grant | 53 min |
| May 11, 9:29 PM MDT | Severe Thunderstorm Warning | BIS | Grant, Morton | 61 min |
| May 11, 9:51 PM MDT | Special Weather Statement | BIS | Williams | 54 min |
| May 11, 10:04 PM MDT | Special Weather Statement | BIS | Dunn | 56 min |
| May 11, 10:30 PM MDT | Special Weather Statement | BIS | Burleigh, Morton | 60 min |
| May 12, 12:13 AM MDT | Special Weather Statement | BIS | Burleigh | 32 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 2025Every severe thunderstorm warning in 2025
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.