Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 10, NWS Grand Forks, ND

June 7, 2021Polk County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 7, 2021, 5:51 PM CDT for Polk County, Minnesota. It was in force for 24 min. 3 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, 5:51 PM CDT (22:51 UTC)
Expired: Jun 7, 2021, 6:15 PM CDT
In force: 24 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Polk County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 45 km from the middle of the area, began a volume at 22:51 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, 5:55 PM CDT	HAIL 0.75	3 Ne Eldred, MN	RELAYED VIA SPOTTER NETWORK.
Jun 7, 6:00 PM CDT	HAIL 1	1 N Eldred, MN	VIA SOCIAL MEDIA.
Jun 7, 6:00 PM CDT	HAIL 1	2 Ene Eldred, MN	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

International Fa, MN (KINL), launched 12:00Z, 10.9 hours before the alert went out and 276 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: 2750 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

205 
WUUS53 KFGF 072251
SVRFGF
MNC119-072330-
/O.NEW.KFGF.SV.W.0010.210607T2251Z-210607T2330Z/

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

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  West central Polk County in northwestern Minnesota...

* Until 630 PM CDT.

* At 551 PM CDT, a severe thunderstorm was located near Eldred, or 15
  miles southeast of Grand Forks, moving east at 45 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...
  Eldred around 555 PM CDT.
  Crookston around 610 PM CDT.

Other locations in the path of this severe thunderstorm include
Harold.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4770 9643 4767 9689 4768 9690 4769 9690
      4769 9691 4770 9692 4772 9692 4774 9693
      4777 9694 4783 9660
TIME...MOT...LOC 2251Z 259DEG 39KT 4772 9686 

HAIL...1.00IN
WIND...60MPH
 
$$

DJR

2 follow-up statements

054 
WWUS53 KFGF 072255
SVSFGF

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

MNC119-072330-
/O.CON.KFGF.SV.W.0010.000000T0000Z-210607T2330Z/
Polk MN-
555 PM CDT Mon Jun 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR WEST CENTRAL POLK COUNTY...

At 555 PM CDT, a severe thunderstorm was located over Eldred, or 17
miles southeast of Grand Forks, moving east at 45 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

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

This severe storm will be near...
  Crookston around 610 PM CDT.

Other locations in the path of this severe thunderstorm include
Harold.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4767 9684 4777 9688 4783 9660 4770 9643
TIME...MOT...LOC 2255Z 260DEG 38KT 4772 9679 

HAIL...1.25IN
WIND...60MPH
 
$$

DJR

455 
WWUS53 KFGF 072315
SVSFGF

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

MNC119-072324-
/O.CAN.KFGF.SV.W.0010.000000T0000Z-210607T2330Z/
Polk MN-
615 PM CDT Mon Jun 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL POLK COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However small hail and
gusty winds are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until midnight CDT for
northwestern Minnesota.

LAT...LON 4767 9684 4777 9688 4783 9660 4770 9643
TIME...MOT...LOC 2313Z 259DEG 39KT 4776 9648 

$$

DJR

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.