Alert archive / Minnesota / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 167, NWS Grand Forks, ND

August 14, 2025Pennington County, Polk County, Red Lake County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 14, 2025, 10:27 PM CDT for Pennington County, Polk County, Red Lake County, Minnesota. It was in force for 63 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
Aug 14, 2025, 10:27 PM CDT (03:27 UTC)
Expired
Aug 14, 2025, 11:30 PM CDT
In force
63 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Pennington County, MN, Polk County, MN, Red Lake County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 95 km from the middle of the area, began a volume at 03:28 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

International Fa, MN (KINL), launched 00:00Z, 3.5 hours before the alert went out and 226 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.

Skew-T log-pSkew-T log-p diagram, International Fa, MN at 00:00Z on 2025-08-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 487 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 00:00Z on 2025-08-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 155 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
487 J/kg
Mixed-layer CIN
-110 J/kg
Mixed-layer LCL
949 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
155 m²/s²
0-3 km storm-relative helicity
196 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.1

Open this sounding in Storm Lab

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 Aug 14, 9:49 PM CDT, 38 minutes earlier.

Area forecast discussion, Aug 14, 9:49 PM CDT, 38 minutes before
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Hazardous weather outlook, Aug 14, 9:58 AM CDT, 12 hours 29 minutes before
Hazardous Weather Outlook
National Weather Service Grand Forks ND
958 AM CDT Thu Aug 14 2025

MNZ001-002-004>009-013>017-022-023-NDZ006>008-014>016-024-026>030-
038-039-054-151500-
West Polk-Norman-Kittson-Roseau-Lake Of The Woods-West Marshall-
East Marshall-North Beltrami-Pennington-Red Lake-East Polk-
North Clearwater-South Beltrami-Mahnomen-South Clearwater-Towner-
Cavalier-Pembina-Benson-Ramsey-Eastern Walsh-Eddy-Nelson-
Grand Forks-Griggs-Steele-Traill-Barnes-Cass-Western Walsh-
958 AM CDT Thu Aug 14 2025

This hazardous weather outlook is for portions of eastern North
Dakota and northwest Minnesota.

.DAY ONE...Today and Tonight

There is a level 2 out of 5 risk for severe thunderstorms late
afternoon into evening. The main hazards will be hail up to the
size of tennis balls, gusts to 70 mph, and possibly a couple
tornadoes. There remains uncertainty on coverage and timing of
storms.

General storm motion...Moving toward the east at 20 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.

MNZ003-024-027>032-040-NDZ049-052-053-151500-
Clay-Hubbard-West Becker-East Becker-Wilkin-West Otter Tail-
East Otter Tail-Wadena-Grant-Ransom-Sargent-Richland-
958 AM CDT Thu Aug 14 2025

This hazardous weather outlook is for portions of eastern North
Dakota, west central and northwest Minnesota.

.DAY ONE...Today and Tonight

There is a level 2 out of 5 risk for severe thunderstorms late
afternoon into evening. The main hazards will be hail up to the
size of tennis balls, gusts to 70 mph, and possibly a couple
tornadoes. There remains uncertainty on coverage and timing of
storms.

General storm motion...Moving toward the east at 20 mph.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

There is a level 1 out of 5 risk for severe thunderstorms Friday
afternoon within southeast North Dakota into west- central
Minnesota.

There is a low chance for strong thunderstorms Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be required today.

In the hours before

Local storm report, Aug 14, 10:25 PM CDT, 2 minutes before
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The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 14, 8:08 PM CDTSevere Thunderstorm WarningFGFMarshall37 min
Aug 14, 8:58 PM CDTSevere Thunderstorm WarningFGFPolk47 min
Aug 14, 9:39 PM CDTSevere Thunderstorm WarningFGFPennington, Polk66 min
Aug 14, 10:37 PM CDTAreal Flood AdvisoryFGFPolk3 hr
Aug 14, 11:17 PM CDTSevere Thunderstorm WarningFGFClearwater, Pennington, Polk, Red Lake58 min
Aug 15, 7:39 AM CDTSpecial Weather StatementFGFBarnes36 min
Aug 15, 8:17 AM CDTSpecial Weather StatementFGFCass28 min
Aug 15, 8:56 AM CDTSpecial Weather StatementFGFTraill34 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 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.