Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 20, NWS Grand Forks, ND

June 8, 2021Otter Tail County, Wadena County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 8, 2021, 12:17 AM CDT for Otter Tail County, Wadena County, Minnesota. It was in force for 43 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 8, 2021, 12:17 AM CDT (05:17 UTC)
Expired: Jun 8, 2021, 1:00 AM CDT
In force: 43 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Otter Tail County, MN, Wadena County, MN

The radar

The Minneapolis radar (KMPX), 208 km from the middle of the area, began a volume at 05:18 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 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.
Jun 8, 12:49 AM CDT	TSTM WND DMG	2 Wnw Bluffton, MN	LARGE BRANCHES AND A FEW SMALL TREES BLOWN DOWN.

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

Minneapolis, MN (KMPX), launched 00:00Z, 5.3 hours before the alert went out and 207 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: 1238 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 2290 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

079 
WUUS53 KFGF 080517
SVRFGF
MNC111-159-080600-
/O.NEW.KFGF.SV.W.0020.210608T0517Z-210608T0600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
1217 AM CDT Tue Jun 8 2021

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Southern Wadena County in central Minnesota...
  Eastern Otter Tail County in west central Minnesota...

* Until 100 AM CDT.

* At 1216 AM CDT, severe thunderstorms were located along a line
  extending from near Butler to near Ottertail to near Ashby, moving
  east at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Wadena, New York Mills, Parkers Prairie, Battle Lake, Henning,
  Verndale and Ottertail.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4637 9473 4637 9515 4611 9515 4611 9597
      4639 9561 4667 9552 4660 9478 4639 9478
      4638 9473
TIME...MOT...LOC 0516Z 277DEG 48KT 4665 9547 4639 9554 4607 9588 

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, 11:26 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, 12:23 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.