Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 112, NWS Grand Forks, ND

September 15, 2021Kittson County, Marshall County, Minnesota; Pembina County, Walsh County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Sep 15, 2021, 10:38 PM CDT for Kittson County, Marshall County, Minnesota; Pembina County, Walsh County, North Dakota. It was in force for 52 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: Sep 15, 2021, 10:38 PM CDT (03:38 UTC)
Expired: Sep 15, 2021, 11:30 PM CDT
In force: 52 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Kittson County, MN, Marshall County, MN, Pembina County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 111 km from the middle of the area, began a volume at 03:37 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, 3.6 hours before the alert went out and 272 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: 6 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 1751 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

553 
WUUS53 KFGF 160338
SVRFGF
MNC069-089-NDC067-099-160430-
/O.NEW.KFGF.SV.W.0112.210916T0338Z-210916T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
1038 PM CDT Wed Sep 15 2021

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Northwestern Marshall County in northwestern Minnesota...
  Southwestern Kittson County in northwestern Minnesota...
  Northeastern Walsh County in northeastern North Dakota...
  Southeastern Pembina County in northeastern North Dakota...

* Until 1130 PM CDT.

* At 1037 PM CDT, a severe thunderstorm was located over Oakwood, or
  near Grafton, moving east at 35 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Herrick around 1040 PM CDT.
  Drayton around 1045 PM CDT.
  Robbin around 1050 PM CDT.

Other locations in the path of this severe thunderstorm include
Stephen and Donaldson.

This includes Interstate 29 between mile markers 167 and 189.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4871 9665 4827 9657 4828 9733 4845 9747
      4859 9732
TIME...MOT...LOC 0337Z 261DEG 32KT 4845 9727 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Lynch

1 follow-up statement

402 
WWUS53 KFGF 160415
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
1115 PM CDT Wed Sep 15 2021

NDC067-099-160424-
/O.CAN.KFGF.SV.W.0112.000000T0000Z-210916T0430Z/
Walsh ND-Pembina ND-
1115 PM CDT Wed Sep 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WALSH AND
SOUTHEASTERN PEMBINA COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4871 9665 4827 9657 4829 9712 4866 9691
TIME...MOT...LOC 0414Z 261DEG 32KT 4850 9678 

$$

MNC069-089-160430-
/O.CON.KFGF.SV.W.0112.000000T0000Z-210916T0430Z/
Marshall MN-Kittson MN-
1115 PM CDT Wed Sep 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR NORTHWESTERN MARSHALL AND SOUTH CENTRAL KITTSON COUNTIES...

At 1114 PM CDT, a severe thunderstorm was located near Stephen, or 29
miles east of Grafton, moving east at 35 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
  Englund and Florian.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4871 9665 4827 9657 4829 9712 4866 9691
TIME...MOT...LOC 0414Z 261DEG 32KT 4850 9678 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Lynch

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 15, 10:47 PM CDT	Severe Thunderstorm Warning	FGF	Marshall, Polk	43 min
Sep 15, 11:25 PM CDT	Severe Thunderstorm Warning	FGF	Marshall, Pennington, Polk	50 min
Sep 15, 11:27 PM CDT	Special Weather Statement	FGF	Marshall	48 min
Sep 15, 11:45 PM CDT	Severe Thunderstorm Warning	FGF	Polk	60 min
Sep 16, 12:14 AM CDT	Special Weather Statement	FGF	Pennington	46 min
Sep 16, 12:22 AM CDT	Special Weather Statement	FGF	Polk, Red Lake	38 min
Sep 16, 12:42 AM CDT	Severe Thunderstorm Warning	FGF	Polk, Red Lake	33 min
Sep 16, 1:13 AM CDT	Special Weather Statement	FGF	Red Lake	32 min
Sep 16, 1:23 AM CDT	Special Weather Statement	FGF	Mahnomen	37 min
Sep 16, 1:51 AM CDT	Special Weather Statement	FGF	Beltrami, Clearwater	54 min
Sep 16, 1:59 AM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater, Hubbard, Mahnomen, Polk	49 min
Sep 16, 2:44 AM CDT	Special Weather Statement	FGF	Hubbard	46 min
Sep 15, 8:52 PM CDT	Special Weather Statement	FGF	Cavalier	38 min
Sep 15, 9:31 PM CDT	Special Weather Statement	FGF	Walsh	59 min
Sep 15, 9:33 PM CDT	Special Weather Statement	FGF	Nelson	57 min
Sep 15, 9:42 PM CDT	Severe Thunderstorm Warning	FGF	Pembina, Walsh	63 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2021 Severe Thunderstorm Warnings in North Dakota, 2021 Every severe thunderstorm warning in 2021

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.