Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 18, NWS Grand Forks, ND

June 7, 2021Clay County, Otter Tail County, Wilkin County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 7, 2021, 11:26 PM CDT for Clay County, Otter Tail County, Wilkin County, Minnesota. It was in force for 64 min. 4 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: Jun 7, 2021, 11:26 PM CDT (04:26 UTC)
Expired: Jun 8, 2021, 12:30 AM CDT
In force: 64 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Clay County, MN, Otter Tail County, MN, Wilkin County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 163 km from the middle of the area, began a volume at 04:27 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
Jun 7, 11:59 PM CDT	TSTM WND GST 69	2 S Frazee, MN	MNDOT RWIS MEASURED 69 MPH WIND GUST AT 1159 CDT.
Jun 7, 11:59 PM CDT	TSTM WND GST 69	2 Sse Frazee, MN	PEAK WIND MEASURED AT A MNDOT RWIS STATION.
Jun 8, 12:30 AM CDT	TSTM WND DMG	Ottertail, MN	DOWNED LIMBS AND TREES, PERIOD OF WIND GUSTS TO 70MPH. RELAYED VIA SOCIAL MEDIA.
Jun 8, 12:30 AM CDT	TSTM WND DMG	Ottertail, MN	DOWNED LIMDS, TREES, AND POWER LINES. MULTIPLE PERIODS OF WIND GUSTS TO 70 MPH. REPORT POSTED VIA SOCIAL MEDIA.

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
Jun 7, 5:45 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 4.4 hours before the alert went out and 242 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: 2695 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 2391 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 161 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.8

Open this sounding in Storm Lab

The text

As transmitted.

763 
WUUS53 KFGF 080426
SVRFGF
MNC027-111-167-080530-
/O.NEW.KFGF.SV.W.0018.210608T0426Z-210608T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
1126 PM CDT Mon Jun 7 2021

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Southeastern Clay County in northwestern Minnesota...
  Otter Tail County in west central Minnesota...
  Northeastern Wilkin County in west central Minnesota...

* Until 1230 AM CDT.

* At 1125 PM CDT, severe thunderstorms were located along a line
  extending from near Cormorant to near Everdell, moving east at 35
  mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated. At 2318, a wind gust to 64 mph was 
           reported at Rothsay.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Fergus Falls, Perham, Pelican Rapids, Ottertail Lake, Lake Lida,
  Battle Lake and Ottertail.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4611 9626 4626 9659 4672 9631 4671 9533
      4611 9563
TIME...MOT...LOC 0425Z 288DEG 32KT 4670 9612 4623 9636 

HAIL...<.75IN
WIND...70MPH
 
$$

Lynch

1 follow-up statement

280 
WWUS53 KFGF 080451
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
1151 PM CDT Mon Jun 7 2021

MNC027-080501-
/O.CAN.KFGF.SV.W.0018.000000T0000Z-210608T0530Z/
Clay MN-
1151 PM CDT Mon Jun 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLAY COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
northwestern and west central Minnesota.

LAT...LON 4612 9628 4628 9644 4663 9622 4663 9617
      4672 9617 4671 9533 4611 9563 4611 9626
TIME...MOT...LOC 0451Z 288DEG 32KT 4663 9580 4616 9604 

$$

MNC111-167-080530-
/O.CON.KFGF.SV.W.0018.000000T0000Z-210608T0530Z/
Otter Tail MN-Wilkin MN-
1151 PM CDT Mon Jun 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR OTTER TAIL AND EAST CENTRAL WILKIN COUNTIES...

At 1151 PM CDT, severe thunderstorms were located along a line
extending from Vergas to 6 miles west of Dalton, moving east at 35
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Fergus Falls, Perham, Pelican Rapids, Ottertail Lake, Lake Lida,
Battle Lake and Ottertail.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4612 9628 4628 9644 4663 9622 4663 9617
      4672 9617 4671 9533 4611 9563 4611 9626
TIME...MOT...LOC 0451Z 288DEG 32KT 4663 9580 4616 9604 

HAIL...<.75IN
WIND...60MPH
 
$$

Lynch

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 7, 10:03 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Wilkin	57 min
Jun 7, 10:55 PM CDT	Special Weather Statement	FGF	Clay	65 min
Jun 7, 11:12 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay	48 min
Jun 7, 11:47 PM CDT	Special Weather Statement	FGF	Beltrami	58 min
Jun 7, 11:55 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Otter Tail	50 min
Jun 8, 12:17 AM CDT	Severe Thunderstorm Warning	FGF	Otter Tail, Wadena	43 min
Jun 8, 12:23 AM CDT	Special Weather Statement	FGF	Grant	67 min
Jun 8, 12:34 AM CDT	Special Weather Statement	FGF	Hubbard	41 min
Jun 8, 12:39 AM CDT	Special Weather Statement	FGF	Becker	36 min
Jun 8, 12:54 AM CDT	Special Weather Statement	FGF	Wadena	36 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.