Alert archive / Minnesota / Tornado Warnings in 2020

Tornado Warning 36, NWS Grand Forks, ND

August 9, 2020Clay County, Norman County, Minnesota; Cass County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Aug 9, 2020, 3:35 PM CDT for Clay County, Norman County, Minnesota; Cass County, North Dakota. It was in force for 18 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 9, 2020, 3:35 PM CDT (20:35 UTC)
Expired: Aug 9, 2020, 3:53 PM CDT
In force: 18 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Clay County, MN, Norman County, MN, Cass County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 70 km from the middle of the area, began a volume at 20:34 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
Aug 9, 12:18 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 8.6 hours before the alert went out and 273 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1862 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: -35 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

338 
WFUS53 KFGF 092035
TORFGF
MNC027-107-NDC017-092115-
/O.NEW.KFGF.TO.W.0036.200809T2035Z-200809T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Grand Forks ND
335 PM CDT Sun Aug 9 2020

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  Northern Clay County in northwestern Minnesota...
  South central Norman County in northwestern Minnesota...
  Northeastern Cass County in southeastern North Dakota...

* Until 415 PM CDT.
    
* At 335 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Argusville, or 11 miles north of Fargo, moving
  east at 15 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Expect damage to mobile homes, roofs, and vehicles.

* This dangerous storm will be near...
  Georgetown around 355 PM CDT.
  Kragnes around 400 PM CDT.
  Felton and Averill around 415 PM CDT.

Other locations impacted by this tornadic thunderstorm include West
Argusville.

This includes Interstate 29 between mile markers 73 and 83.
 
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 4697 9696 4711 9701 4726 9633 4697 9626
TIME...MOT...LOC 2035Z 266DEG 14KT 4704 9689 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

DJR

1 follow-up statement

283 
WWUS53 KFGF 092053
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
353 PM CDT Sun Aug 9 2020

MNC027-107-NDC017-092103-
/O.CAN.KFGF.TO.W.0036.000000T0000Z-200809T2115Z/
Clay MN-Norman MN-Cass ND-
353 PM CDT Sun Aug 9 2020

...THE TORNADO WARNING FOR NORTHERN CLAY...SOUTH CENTRAL NORMAN AND
NORTHEASTERN CASS COUNTIES IS CANCELLED...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.

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

LAT...LON 4697 9696 4711 9701 4726 9633 4697 9626
TIME...MOT...LOC 2053Z 266DEG 14KT 4705 9678 

$$

DJR

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 4:36 AM CDT	Special Weather Statement	FGF	Grant, Wilkin	54 min
Aug 9, 4:55 AM CDT	Special Weather Statement	FGF	Otter Tail	65 min
Aug 9, 5:49 AM CDT	Special Weather Statement	FGF	Becker, Wadena	56 min
Aug 9, 7:10 AM CDT	Special Weather Statement	FGF	Norman	65 min
Aug 9, 8:41 AM CDT	Special Weather Statement	FGF	Lake of the Woods	64 min
Aug 9, 12:21 PM CDT	Severe Thunderstorm Warning	FGF	Kittson, Marshall	54 min
Aug 9, 1:08 PM CDT	Severe Thunderstorm Warning	FGF	Kittson, Roseau	67 min
Aug 9, 1:39 PM CDT	Severe Thunderstorm Warning	FGF	Marshall, Polk	66 min
Aug 9, 2:01 PM CDT	Tornado Warning	FGF	Marshall, Pennington, Polk	44 min
Aug 9, 2:05 PM CDT	Severe Thunderstorm Warning	FGF	Marshall, Pennington, Polk, Red Lake	55 min
Aug 9, 2:10 PM CDT	Severe Thunderstorm Warning	FGF	Norman, Polk, Red Lake	65 min
Aug 9, 2:20 PM CDT	Tornado Warning	FGF	Beltrami, Marshall	40 min
Aug 9, 2:42 PM CDT	Tornado Warning	FGF	Beltrami, Clearwater, Marshall, Pennington, Polk, Red Lake	48 min
Aug 9, 2:49 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Lake of the Woods, Marshall, Roseau	56 min
Aug 9, 2:52 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Norman	53 min
Aug 9, 2:57 PM CDT	Tornado Warning	FGF	Beltrami, Marshall	33 min
Aug 9, 3:06 PM CDT	Tornado Warning	FGF	Lake of the Woods, Roseau	24 min
Aug 9, 3:12 PM CDT	Severe Thunderstorm Warning	FGF	Polk, Red Lake	63 min
Aug 9, 3:18 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater, Lake of the Woods, Marshall, Pennington, Polk and 2 more	57 min
Aug 9, 3:20 PM CDT	Severe Thunderstorm Warning	FGF	Clay	22 min
Aug 9, 3:41 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater, Hubbard, Mahnomen, Norman, Polk and 1 more	64 min
Aug 9, 3:47 PM CDT	Tornado Warning	FGF	Lake of the Woods	28 min
Aug 9, 3:53 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Clearwater, Hubbard, Mahnomen, Norman	48 min
Aug 9, 4:38 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Beltrami, Clearwater, Hubbard, Mahnomen, Norman and 1 more	52 min
Aug 9, 5:28 PM CDT	Special Weather Statement	FGF	Hubbard	32 min
Aug 9, 5:31 PM CDT	Severe Thunderstorm Warning	FGF	Hubbard	29 min
Aug 9, 5:33 PM CDT	Special Weather Statement	FGF	Clearwater	57 min
Aug 9, 4:29 AM CDT	Special Weather Statement	FGF	Richland	61 min
Aug 9, 5:31 AM CDT	Special Weather Statement	FGF	Ransom	59 min
Aug 9, 6:01 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	59 min
Aug 9, 6:57 AM CDT	Special Weather Statement	FGF	Benson, Ramsey	48 min
Aug 9, 9:09 AM CDT	Special Weather Statement	FGF	Grand Forks	66 min
Aug 9, 9:51 AM CDT	Special Weather Statement	FGF	Walsh	54 min
Aug 9, 10:12 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson, Ramsey, Walsh	63 min
Aug 9, 10:24 AM CDT	Special Weather Statement	FGF	Cavalier, Towner	66 min
Aug 9, 11:05 AM CDT	Special Weather Statement	FGF	Walsh	55 min
Aug 9, 11:24 AM CDT	Special Weather Statement	FGF	Cavalier, Pembina	66 min
Aug 9, 11:28 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Walsh	62 min
Aug 9, 11:42 AM CDT	Tornado Warning	FGF	Cavalier, Pembina, Walsh	36 min
Aug 9, 12:27 PM CDT	Special Weather Statement	FGF	Grand Forks, Nelson, Walsh	63 min
Aug 9, 1:29 PM CDT	Special Weather Statement	FGF	Grand Forks	61 min
Aug 9, 2:14 PM CDT	Tornado Warning	FGF	Barnes, Cass	18 min
Aug 9, 2:25 PM CDT	Tornado Warning	FGF	Cass	30 min
Aug 9, 2:36 PM CDT	Tornado Warning Tornado observed	FGF	Traill	28 min
Aug 9, 3:38 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Sargent	25 min
Aug 9, 3:55 PM CDT	Severe Thunderstorm Warning	FGF	Sargent	28 min
Aug 9, 4:24 PM CDT	Special Weather Statement	FGF	Sargent	36 min

Nearby

Tornado Warnings in Minnesota, 2020 Tornado Warnings in North Dakota, 2020 Every tornado warning in 2020 Tornadoes in 2020

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.