Alert archive / Minnesota / Tornado Warnings in 2025

Tornado Warning 49, NWS Grand Forks, ND

August 8, 2025Grand Forks County, North Dakota; Marshall County, Polk County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Aug 8, 2025, 4:12 AM CDT for Grand Forks County, North Dakota; Marshall County, Polk County, Minnesota. It was in force for 33 min. 14 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 8, 2025, 4:12 AM CDT (09:12 UTC)
Expired: Aug 8, 2025, 4:45 AM CDT
In force: 33 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Marshall County, MN, Polk County, MN, Grand Forks County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 64 km from the middle of the area, began a volume at 09:12 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
Aug 8, 4:12 AM CDT	TSTM WND GST 59	6 Wnw Grand Forks, ND	Corrects previous non-tstm wnd gst report from 6 WNW Grand Forks. ASOS station KGFK Grand Forks AP ND.
Aug 8, 4:12 AM CDT	TSTM WND GST 91	4 Ssw Mekinock, ND	Grand Forks Air Force Base recorded wind gust of 91 mph.
Aug 8, 4:12 AM CDT	NON-TSTM WND GST 59	6 Wnw Grand Forks, ND	ASOS station KGFK Grand Forks AP ND.
Aug 8, 4:12 AM CDT	TORNADO	6 S Manvel, ND	This tornado likely rain wrapped intermittently produced damage across its nearly 4 mile long path with wind speeds up to 110 mph. This gives it an EF-1 rating.
Aug 8, 4:14 AM CDT	TORNADO	Grand Forks, ND	Intermittent path through town with higher end damage concentrated along path of correlated broad radar signature. Tornado rated EF-1 with estimated peak winds of 100 MPH. Tornado rated EF-1.
Aug 8, 4:20 AM CDT	TSTM WND GST 74	Emerado, ND	NDAWN Mesonet at Emerado (33ft).
Aug 8, 4:30 AM CDT	TSTM WND DMG	Oslo, MN	Tree damage around town. Time estimated from radar.
Aug 8, 4:40 AM CDT	TSTM WND DMG	Warren, MN	Tree damage throughout town. Time estimated from radar.
Aug 8, 4:40 AM CDT	TSTM WND GST 56	Mallory, MN	Corrects previous non-tstm wnd gst report from Mallory. Mesonet station MN060 E Grand Forks MN DOT.
Aug 8, 4:40 AM CDT	TSTM WND GST 73	4 S Warren, MN	Personal weather station reported.
Aug 8, 4:40 AM CDT	NON-TSTM WND GST 56	Mallory, MN	Mesonet station MN060 E Grand Forks MN DOT.
Aug 8, 4:45 AM CDT	TSTM WND GST 56	March, MN	Corrects previous non-tstm wnd gst report from March. Mesonet station MN168 Warren MN DOT.
Aug 8, 4:45 AM CDT	NON-TSTM WND GST 56	March, MN	Mesonet station MN168 Warren MN DOT.
Aug 8, 4:50 AM CDT	TSTM WND DMG	Alvarado, MN	Tree damage around town. Time estimated from radar.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 7, 11:57 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 9.2 hours before the alert went out and 279 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1108 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1764 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

As transmitted.

810 
WFUS53 KFGF 080912
TORFGF
MNC089-119-NDC035-080945-
/O.NEW.KFGF.TO.W.0049.250808T0912Z-250808T0945Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Grand Forks ND
412 AM CDT Fri Aug 8 2025

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  Southwestern Marshall County in northwestern Minnesota...
  Northwestern Polk County in northwestern Minnesota...
  Central Grand Forks County in northeastern North Dakota...

* Until 445 AM CDT.

* At 412 AM CDT, severe thunderstorms capable of producing a tornado
  were located along a line extending from near Gilby to Merrifield,
  moving east at 60 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  Grand Forks, East Grand Forks, Grand Forks AFB, Warren, Emerado,
  Alvarado, and Manvel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4825 9679 4787 9651 4780 9728 4812 9757
TIME...MOT...LOC 0912Z 263DEG 50KT 4811 9736 4782 9711 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Lynch

1 follow-up statement

554 
WWUS53 KFGF 080926
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
426 AM CDT Fri Aug 8 2025

NDC035-080934-
/O.CAN.KFGF.TO.W.0049.000000T0000Z-250808T0945Z/
Grand Forks ND-
426 AM CDT Fri Aug 8 2025

...THE TORNADO WARNING FOR CENTRAL GRAND FORKS COUNTY IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the tornado warning has been cancelled. A severe 
thunderstorm warning remains in effect.

A Severe Thunderstorm Watch remains in effect until 700 AM CDT for
northwestern Minnesota...and northeastern North Dakota.

&&

LAT...LON 4825 9679 4787 9651 4783 9698 4790 9702
      4792 9702 4793 9703 4802 9708 4804 9707
      4806 9709 4815 9713 4816 9712 4816 9714
      4818 9714 4819 9715
TIME...MOT...LOC 0924Z 263DEG 50KT 4813 9714 4784 9689 

$$

MNC089-119-080945-
/O.CON.KFGF.TO.W.0049.000000T0000Z-250808T0945Z/
Marshall MN-Polk MN-
426 AM CDT Fri Aug 8 2025

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 AM CDT FOR
SOUTHWESTERN MARSHALL AND NORTHWESTERN POLK COUNTIES...

At 424 AM CDT, severe thunderstorms capable of producing tornadoes
were located along a line extending from near Manvel to near Bygland,
moving east at 60 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
East Grand Forks, Warren, Alvarado, Oslo, Euclid, Angus, and Tabor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4825 9679 4787 9651 4783 9698 4790 9702
      4792 9702 4793 9703 4802 9708 4804 9707
      4806 9709 4815 9713 4816 9712 4816 9714
      4818 9714 4819 9715
TIME...MOT...LOC 0924Z 263DEG 50KT 4813 9714 4784 9689 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Lynch

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 12:14 AM CDT	Tornado Warning	FGF	Benson	16 min
Aug 8, 12:29 AM CDT	Tornado Warning	FGF	Benson	31 min
Aug 8, 12:48 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Ramsey, Towner	57 min
Aug 8, 1:40 AM CDT	Special Weather Statement	FGF	Benson, Cavalier, Ramsey	65 min
Aug 8, 1:59 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Nelson	61 min
Aug 8, 2:41 AM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	Barnes, Benson, Cass, Eddy, Grand Forks, Griggs and 3 more	64 min
Aug 8, 2:42 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Nelson	20 min
Aug 8, 2:52 AM CDT	Tornado Warning	FGF	Barnes, Eddy, Griggs, Steele	23 min
Aug 8, 3:10 AM CDT	Tornado Warning	FGF	Griggs, Nelson	20 min
Aug 8, 3:16 AM CDT	Severe Thunderstorm Warning Destructive damage threat	FGF	Grand Forks, Griggs, Nelson, Steele, Traill	29 min
Aug 8, 3:23 AM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	Barnes, Cass, Griggs, Ransom, Steele, Traill	37 min
Aug 8, 3:34 AM CDT	Severe Thunderstorm Warning Destructive damage threat	FGF	Grand Forks, Griggs, Nelson, Steele, Traill	56 min
Aug 8, 3:44 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson, Walsh	46 min
Aug 8, 3:55 AM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	Cass, Ransom, Richland, Traill	65 min
Aug 8, 3:58 AM CDT	Severe Thunderstorm Warning Destructive damage threat	FGF	Grand Forks, Steele, Traill	62 min
Aug 8, 4:01 AM CDT	Tornado Warning Tornado observed	FGF	Grand Forks	14 min
Aug 8, 4:16 AM CDT	Tornado Warning	FGF	Traill	29 min
Aug 8, 4:28 AM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	Grand Forks, Walsh	62 min
Aug 8, 4:49 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Walsh	56 min
Aug 8, 5:27 AM CDT	Severe Thunderstorm Warning	FGF	Pembina	63 min
Aug 8, 4:43 AM CDT	Tornado Warning	FGF	Becker, Clay, Mahnomen, Norman, Polk	32 min
Aug 8, 5:00 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Clearwater, Hubbard, Mahnomen, Norman and 2 more	60 min
Aug 8, 5:02 AM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	Beltrami, Clearwater, Mahnomen, Norman, Polk, Red Lake	58 min
Aug 8, 5:04 AM CDT	Special Weather Statement	FGF	Grant, Otter Tail, Wilkin	56 min
Aug 8, 5:56 AM CDT	Special Weather Statement	FGF	Beltrami, Clearwater	34 min
Aug 8, 5:59 AM CDT	Special Weather Statement	FGF	Becker, Hubbard	31 min
Aug 8, 6:24 AM CDT	Special Weather Statement	FGF	Lake of the Woods, Roseau	36 min
Aug 8, 7:01 AM CDT	Special Weather Statement	FGF	Lake of the Woods	29 min

Nearby

Tornado Warnings in Minnesota, 2025 Tornado Warnings in North Dakota, 2025 Every tornado warning in 2025 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.