Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 27, NWS Grand Forks, ND

June 9, 2021Marshall County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 9, 2021, 12:54 AM CDT for Marshall County, Minnesota. It was in force for 37 min. 1 report 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 9, 2021, 12:54 AM CDT (05:54 UTC)
Expired: Jun 9, 2021, 1:31 AM CDT
In force: 37 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Marshall County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 119 km from the middle of the area, began a volume at 05:55 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 9, 1:25 AM CDT	TSTM WND DMG	1 N Newfolden, MN	SEVERAL LARGE 3 TO 5 INCH BRANCHES BROKEN DOWN.

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, 5.9 hours before the alert went out and 229 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: 29 J/kg
Mixed-layer CIN: -291 J/kg
Mixed-layer LCL: 1811 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

024 
WUUS53 KFGF 090554
SVRFGF
MNC089-090645-
/O.NEW.KFGF.SV.W.0027.210609T0554Z-210609T0645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
1254 AM CDT Wed Jun 9 2021

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Central Marshall County in northwestern Minnesota...

* Until 145 AM CDT.

* At 1254 AM CDT, a severe thunderstorm was located near Old Mill
  State Park, or 21 miles northwest of Thief River Falls, moving
  north at 20 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Newfolden, Strandquist and Old Mill State Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4844 9620 4821 9652 4825 9662 4854 9654
      4854 9632
TIME...MOT...LOC 0554Z 191DEG 17KT 4831 9654 

HAIL...1.00IN
WIND...<50MPH
 
$$

CJ

1 follow-up statement

001 
WWUS53 KFGF 090631
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
131 AM CDT Wed Jun 9 2021

MNC089-090641-
/O.CAN.KFGF.SV.W.0027.000000T0000Z-210609T0645Z/
Marshall MN-
131 AM CDT Wed Jun 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MARSHALL 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 is
still possible with this thunderstorm.

LAT...LON 4844 9620 4821 9652 4825 9662 4854 9654
      4854 9632
TIME...MOT...LOC 0630Z 191DEG 17KT 4848 9649 

$$

CJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 12:49 AM CDT	Special Weather Statement	FGF	Marshall	56 min
Jun 9, 1:11 AM CDT	Special Weather Statement	FGF	Marshall, Pennington, Polk, Red Lake	64 min
Jun 9, 2:12 AM CDT	Special Weather Statement	FGF	Marshall, Pennington	63 min
Jun 9, 3:38 AM CDT	Special Weather Statement	FGF	Kittson, Roseau	67 min
Jun 9, 4:47 AM CDT	Special Weather Statement	FGF	Lake of the Woods, Roseau	58 min
Jun 9, 12:51 PM CDT	Severe Thunderstorm Warning	FGF	Marshall, Roseau	54 min
Jun 9, 1:08 PM CDT	Severe Thunderstorm Warning	FGF	Roseau	32 min
Jun 9, 1:13 PM CDT	Special Weather Statement	FGF	Pennington	47 min
Jun 9, 1:46 PM CDT	Special Weather Statement	FGF	Lake of the Woods	59 min
Jun 9, 3:07 PM CDT	Special Weather Statement	FGF	Becker, Hubbard, Otter Tail, Wadena	53 min
Jun 9, 3:15 PM CDT	Special Weather Statement	FGF	Beltrami, Clearwater	60 min
Jun 9, 4:44 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami	61 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.