Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 2, NWS Grand Forks, ND

June 4, 2021Grand Forks County, Traill County, North Dakota; Polk County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 4, 2021, 7:49 PM CDT for Grand Forks County, Traill County, North Dakota; Polk County, Minnesota. It was in force for 41 min. 2 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 4, 2021, 7:49 PM CDT (00:49 UTC)
Expired: Jun 4, 2021, 8:30 PM CDT
In force: 41 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Polk County, MN, Grand Forks County, ND, Traill County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 38 km from the middle of the area, began a volume at 00:35 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 4, 7:52 PM CDT	TSTM WND DMG	2 S Bygland, MN	SEVERAL LARGE 6 TO 8 INCH DIAMETER OAK AND ASH BRANCHES WERE BLOWN DOWN ACROSS THE TOENSHIP ROAD.
Jun 4, 8:04 PM CDT	TSTM WND GST 61	5 N Eldred, MN	PEAK WIND MEASURED AT A PERSONAL WEATHER STATION.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 0.8 hours before the alert went out and 283 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: 370 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 3287 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

682 
WUUS53 KFGF 050049
SVRFGF
MNC119-NDC035-097-050130-
/O.NEW.KFGF.SV.W.0002.210605T0049Z-210605T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
749 PM CDT Fri Jun 4 2021

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Southwestern Polk County in northwestern Minnesota...
  Southeastern Grand Forks County in northeastern North Dakota...
  Northeastern Traill County in southeastern North Dakota...

* Until 830 PM CDT.

* At 749 PM CDT, a severe thunderstorm was located near Bygland, or
  11 miles southeast of Grand Forks, moving east at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Public.

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

* This severe thunderstorm will be near...
  Fisher around 755 PM CDT.
  Eldred around 800 PM CDT.

Other locations in the path of this severe thunderstorm include
Crookston, Greenview and Harold.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4765 9720 4785 9709 4783 9636 4750 9654
TIME...MOT...LOC 0049Z 290DEG 29KT 4777 9690 

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

Knutsvig

2 follow-up statements

348 
WWUS53 KFGF 050112
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
812 PM CDT Fri Jun 4 2021

NDC035-097-050122-
/O.CAN.KFGF.SV.W.0002.000000T0000Z-210605T0130Z/
Grand Forks ND-Traill ND-
812 PM CDT Fri Jun 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GRAND FORKS AND
NORTHEASTERN TRAILL 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 4783 9636 4750 9654 4757 9686 4761 9685
      4762 9688 4767 9689 4772 9693 4772 9692
      4773 9693 4777 9694 4778 9696 4779 9696
      4781 9699 4782 9698 4784 9700 4785 9697
TIME...MOT...LOC 0112Z 290DEG 29KT 4770 9664 

$$

MNC119-050130-
/O.CON.KFGF.SV.W.0002.000000T0000Z-210605T0130Z/
Polk MN-
812 PM CDT Fri Jun 4 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR SOUTHWESTERN POLK COUNTY...

At 812 PM CDT, a severe thunderstorm was located near Crookston, or
23 miles southeast of Grand Forks, moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Public.

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

Locations impacted include...
  Greenview and Harold.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4783 9636 4750 9654 4757 9686 4761 9685
      4762 9688 4767 9689 4772 9693 4772 9692
      4773 9693 4777 9694 4778 9696 4779 9696
      4781 9699 4782 9698 4784 9700 4785 9697
TIME...MOT...LOC 0112Z 290DEG 29KT 4770 9664 

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

Knutsvig

061 
WWUS53 KFGF 050129
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
829 PM CDT Fri Jun 4 2021

MNC119-050139-
/O.EXP.KFGF.SV.W.0002.000000T0000Z-210605T0130Z/
Polk MN-
829 PM CDT Fri Jun 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN POLK COUNTY WILL
EXPIRE AT 830 PM CDT...
                
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 will be allowed to expire.

LAT...LON 4783 9636 4750 9654 4757 9686 4761 9685
      4762 9688 4767 9689 4772 9693 4772 9692
      4773 9693 4777 9694 4778 9696 4779 9696
      4781 9699 4782 9698 4784 9700 4785 9697
TIME...MOT...LOC 0129Z 290DEG 29KT 4766 9647 

$$

Knutsvig

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 7:24 PM CDT	Special Weather Statement	FGF	Grand Forks	36 min
Jun 4, 9:25 PM CDT	Special Weather Statement	FGF	Ransom, Richland	50 min
Jun 5, 2:49 PM CDT	Fire Weather Watch	FGF	Barnes, Benson, Cass, Cavalier, Eddy, Grand Forks and 8 more	14 hr

Nearby

Severe Thunderstorm Warnings in North Dakota, 2021 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.