Alert archive / North Dakota / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 177, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Sep 11, 2025, 9:08 AM CDT for Benson County, Ramsey County, Towner County, North Dakota. It was in force for 67 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 11, 2025, 9:08 AM CDT (14:08 UTC)
- Expired
- Sep 11, 2025, 10:15 AM CDT
- In force
- 67 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Benson County, ND, Ramsey County, ND, Towner County, ND
The radar
The Minot AFB radar (KMBX), 130 km from the middle of the area, began a volume at 14:13 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 nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 2.1 hours before the alert went out and 386 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
- 129 J/kg
- Mixed-layer CIN
- -310 J/kg
- Mixed-layer LCL
- 931 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 175 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
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 Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 11, 7:05 AM CDT, 2 hours 3 minutes earlier.
Area forecast discussion, Sep 11, 7:05 AM CDT, 2 hours 3 minutes before
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</html>Hazardous weather outlook, Sep 11, 6:25 AM CDT, 2 hours 43 minutes before
Hazardous Weather Outlook National Weather Service Grand Forks ND 625 AM CDT Thu Sep 11 2025 MNZ002-003-016-017-022>024-027>032-040-NDZ038-039-049-052-053- 121130- Norman-Clay-North Clearwater-South Beltrami-Mahnomen- South Clearwater-Hubbard-West Becker-East Becker-Wilkin- West Otter Tail-East Otter Tail-Wadena-Grant-Barnes-Cass-Ransom- Sargent-Richland- 625 AM CDT Thu Sep 11 2025 This hazardous weather outlook is for portions of eastern North Dakota, west central and northwest Minnesota. .DAY ONE...Today and Tonight The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Friday through Wednesday The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation may be required today. MNZ001-004>009-013>015-NDZ006>008-014>016-024-026>030-054-121130- West Polk-Kittson-Roseau-Lake Of The Woods-West Marshall- East Marshall-North Beltrami-Pennington-Red Lake-East Polk-Towner- Cavalier-Pembina-Benson-Ramsey-Eastern Walsh-Eddy-Nelson- Grand Forks-Griggs-Steele-Traill-Western Walsh- 625 AM CDT Thu Sep 11 2025 This hazardous weather outlook is for portions of eastern North Dakota and northwest Minnesota. .DAY ONE...Today and Tonight There is a level 1 out of 5 risk for severe thunderstorms across northeastern ND and far northwestern MN, mainly tonight. Main hazards are hail to 1 inch, frequent lightning, and wind gust up to 60 mph. .DAYS TWO THROUGH SEVEN...Friday through Wednesday The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation may be required today.
In the hours before
Special weather statement, Sep 11, 8:07 AM CDT, 1 hour 1 minute before
Special Weather Statement
National Weather Service Grand Forks ND
807 AM CDT Thu Sep 11 2025
NDZ006-111400-
Towner ND-
807 AM CDT Thu Sep 11 2025
...A STRONG THUNDERSTORM WILL IMPACT TOWNER COUNTY THROUGH 900 AM
CDT...
At 807 AM CDT, Doppler radar was tracking a strong thunderstorm near
Agate, or 28 miles northeast of Rugby, moving northeast at 30 mph.
HAZARD...Wind gusts up to 40 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Cando, Bisbee, Rocklake, Egeland, Perth, Arndt, and Amourdale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4885 9953 4897 9901 4843 9897 4838 9948
4843 9950 4872 9949 4872 9952
TIME...MOT...LOC 1307Z 242DEG 24KT 4865 9955
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH
RiddleThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 8:07 AM CDT | Special Weather Statement | FGF | Towner | 53 min |
| Sep 11, 8:33 AM CDT | Severe Thunderstorm Warning | FGF | Towner | 57 min |
| Sep 11, 9:40 AM CDT | Areal Flood Warning | FGF | Towner | 95 min |
| Sep 11, 10:13 AM CDT | Special Weather Statement | FGF | Benson, Ramsey | 32 min |
| Sep 11, 11:36 AM CDT | Flash Flood Warning | FGF | Benson, Ramsey | 3 hr |
| Sep 11, 12:02 PM CDT | Areal Flood Advisory | FGF | Ramsey | 3 hr |
| Sep 11, 3:12 PM CDT | Severe Thunderstorm Warning | FGF | Towner | 33 min |
| Sep 11, 5:58 PM CDT | Special Weather Statement | FGF | Cavalier | 32 min |
| Sep 11, 6:23 PM CDT | Special Weather Statement | FGF | Pembina | 37 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.