Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 17, NWS Grand Forks, ND

June 7, 2021Becker County, Clay County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 7, 2021, 11:12 PM CDT for Becker County, Clay County, Minnesota. It was in force for 48 min. 5 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, 11:12 PM CDT (04:12 UTC)
Expired: Jun 8, 2021, 12:00 AM CDT
In force: 48 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Becker County, MN, Clay County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 121 km from the middle of the area, began a volume at 04:15 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, 11:35 PM CDT	TSTM WND DMG	Cormorant, MN	A SECTION OF ROOF WAS BLOWN OFF A POLE SHED AT A MARINA.
Jun 7, 11:35 PM CDT	TSTM WND DMG	Cormorant, MN	ROOFING BLOWN OFF OF THE MARINA.
Jun 7, 11:40 PM CDT	TSTM WND GST 53	1 Wsw Lake Park, MN	MNDOT RWIS STATION MN062 LAKE PARK MN 0.5 W MEASURED 53 MPH WIND GUST AT 1140 PM CDT.
Jun 7, 11:50 PM CDT	TSTM WND DMG	1 E Frazee, MN	REPORT VIA SPOTTER NETWORK. LARGE BIRCH TREE 2 FEET IN DIAMETER UPROOTED. TIME ESTIMATED BY RADAR.
Jun 7, 11:55 PM CDT	TSTM WND DMG	1 Ene Frazee, MN	A LARGE 2 FOOT DIAMETER BIRCH TREE AWAS UPROOTED. TIME ESTIMATED BASED ON RADAR AND NEARBY SENDOR REPORTS.

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, 4.2 hours before the alert went out and 280 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.

549 
WUUS53 KFGF 080412
SVRFGF
MNC005-027-080500-
/O.NEW.KFGF.SV.W.0017.210608T0412Z-210608T0500Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
1112 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...
  Southwestern Becker County in northwestern Minnesota...

* Until midnight CDT.

* At 1112 PM CDT, a severe thunderstorm was located near Lake Park,
  or 15 miles west of Detroit Lakes, moving east at 30 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Detroit Lakes, Frazee, Lake Park, Callaway, Shoreham, Richwood and
  Rochert.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4672 9631 4685 9626 4696 9628 4705 9568
      4672 9567
TIME...MOT...LOC 0412Z 269DEG 26KT 4686 9616 

HAIL...0.75IN
WIND...60MPH
 
$$

Lynch

1 follow-up statement

012 
WWUS53 KFGF 080439
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
1139 PM CDT Mon Jun 7 2021

MNC027-080448-
/O.CAN.KFGF.SV.W.0017.000000T0000Z-210608T0500Z/
Clay MN-
1139 PM CDT Mon Jun 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLAY COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has 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 Minnesota.

LAT...LON 4672 9617 4673 9618 4698 9617 4705 9568
      4672 9567
TIME...MOT...LOC 0438Z 269DEG 26KT 4686 9588 

$$

MNC005-080500-
/O.CON.KFGF.SV.W.0017.000000T0000Z-210608T0500Z/
Becker MN-
1139 PM CDT Mon Jun 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT
FOR SOUTHWESTERN BECKER COUNTY...

At 1138 PM CDT, a severe thunderstorm was located near Detroit Lakes,
moving east at 30 mph.

HAZARD...70 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Detroit Lakes, Frazee, Lake Park, Callaway, Shoreham, Richwood and
Rochert.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4672 9617 4673 9618 4698 9617 4705 9568
      4672 9567
TIME...MOT...LOC 0438Z 269DEG 26KT 4686 9588 

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

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, 11:26 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Otter Tail, Wilkin	64 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.