Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 63, NWS Grand Forks, ND

June 8, 2020Lake of the Woods County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 8, 2020, 8:38 PM CDT for Lake of the Woods County, Minnesota. It was in force for 52 min. 4 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, 2020, 8:38 PM CDT (01:38 UTC)
Expired: Jun 8, 2020, 9:30 PM CDT
In force: 52 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Lake of the Woods County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 222 km from the middle of the area, began a volume at 01:37 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, 8:45 PM CDT	TORNADO 1	9 Nne Gates Corner, MN	THIS TORNADO TRACKED FOR ABOUT 1.2 MILES UPROOTING FIR AND PINE TREES, AND SNAPPING SEVERAL LARGE DIAMETER ASH AND POPLAR TREES ALONG THE FAUNCE-BUTTERFIELD ROAD, ROUGHLY 4 WSW OF THE NORRIS CAMP DNR STATION. PEAK WINDS ESTIMATED TO 107 MPH. MAXIMUM WIDTH TO 1
Jun 8, 8:45 PM CDT	TORNADO 1	9 Nne Gates Corner, MN	THIS TORNADO TRACKED FOR ABOUT 1.2 MILES UPROOTING FIR AND PINE TREES, AND SNAPPING SEVERAL LARGE DIAMETER ASH AND POPLAR TREES ALONG THE FAUNCE-BUTTERFIELD ROAD, ROUGHLY 4 WSW OF THE NORRIS CAMP DNR STATION. TORNADOE ENDED ABOUT 3SW NORRIS CAMP BY 850 PM CDT.
Jun 8, 8:50 PM CDT	HAIL 1.75	11 W Faunce, MN	REPORTED AT NORRIS CAMP.
Jun 8, 9:15 PM CDT	HAIL 2	Graceton, MN	REPORT AND PHOTO POSTED VIA SOCIAL MEDIA. TIME ESTIMATED BASED ON RADAR.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 12 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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 8, 3:00 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 1.6 hours before the alert went out and 123 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: 2713 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 992 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 142 m²/s²
0-3 km storm-relative helicity: 206 m²/s²
Significant tornado parameter: 3.8
Supercell composite: 18.0

Open this sounding in Storm Lab

The text

As transmitted.

304 
WUUS53 KFGF 090138
SVRFGF
MNC077-090230-
/O.NEW.KFGF.SV.W.0063.200609T0138Z-200609T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
838 PM CDT Mon Jun 8 2020

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Southwestern Lake of the Woods County in north central Minnesota...

* Until 930 PM CDT.

* At 837 PM CDT, a severe thunderstorm was located near Norris Camp,
  or 26 miles southeast of Roseau, moving northeast at 40 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will be near...
  Norris Camp around 840 PM CDT.
  Williams around 900 PM CDT.
  Zippel Bay State Park around 910 PM CDT.
  Wheelers Point around 915 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4854 9522 4861 9534 4863 9534 4871 9518
      4871 9509 4876 9509 4895 9470 4888 9468
      4887 9469 4884 9470 4883 9471 4878 9469
      4873 9463
TIME...MOT...LOC 0137Z 228DEG 39KT 4865 9526 

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

VG

2 follow-up statements

601 
WWUS53 KFGF 090154
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
854 PM CDT Mon Jun 8 2020

MNC077-090230-
/O.CON.KFGF.SV.W.0063.000000T0000Z-200609T0230Z/
Lake of the Woods MN-
854 PM CDT Mon Jun 8 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR SOUTHWESTERN LAKE OF THE WOODS COUNTY...

At 853 PM CDT, a severe thunderstorm was located 7 miles northeast of
Norris Camp, or 32 miles east of Roseau, moving northeast at 40 mph.

HAZARD...Golf ball size hail.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

This severe storm will be near...
  Williams around 910 PM CDT.
  Graceton around 915 PM CDT.
  Pitt and Zippel Bay State Park around 925 PM CDT.
  Wheelers Point around 930 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4858 9509 4869 9521 4871 9518 4871 9509
      4876 9509 4895 9470 4888 9468 4887 9469
      4884 9470 4883 9471 4878 9469 4873 9463
TIME...MOT...LOC 0153Z 247DEG 27KT 4869 9509 

HAIL...1.75IN
WIND...<50MPH
 
$$

VG

741 
WWUS53 KFGF 090208
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
908 PM CDT Mon Jun 8 2020

MNC077-090230-
/O.CON.KFGF.SV.W.0063.000000T0000Z-200609T0230Z/
Lake of the Woods MN-
908 PM CDT Mon Jun 8 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR CENTRAL LAKE OF THE WOODS COUNTY...

At 908 PM CDT, a severe thunderstorm was located near Graceton, or 40
miles east of Roseau, moving east at 35 mph.

HAZARD...Two inch hail.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

This severe storm will be near...
  Graceton around 915 PM CDT.
  Pitt around 920 PM CDT.
  Wheelers Point around 925 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4863 9493 4877 9507 4895 9470 4888 9468
      4887 9469 4884 9470 4883 9471 4878 9469
      4873 9463
TIME...MOT...LOC 0208Z 252DEG 31KT 4872 9490 

HAIL...2.00IN
WIND...<50MPH
 
$$

VG

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 8, 6:44 PM CDT, 1 hour 54 minutes earlier.

Area forecast discussion, Jun 8, 6:44 PM CDT, 1 hour 54 minutes before

Area Forecast Discussion
National Weather Service Grand Forks ND
644 PM CDT Mon Jun 8 2020

.UPDATE...
Issued at 644 PM CDT Mon Jun 8 2020

Thunderstorms continue to lift northeastward into MN, with some
more isolated cells further south down towards northeastern SD.
There continues to be a severe threat with very unstable air and
strong deep layer bulk shear. Some supercell characteristics at
times with rotation cycling on and off, although the low level
shear is pretty weak. Adjusted POPs for current radar trends, and
will continue to maintain the severe thunderstorm watch.

&&

.SHORT TERM...(This evening through Tuesday night)
Issued at 215 PM CDT Mon Jun 8 2020

See the mesoscale discussion concerning the severe weather
potential this afternoon/evening. Excessive rainfall threat seems
more limited compared to yesterday with less training expected.

Showers with embedded thunder likely for much of the area along
and east of the valley Tuesday into Tuesday night. Mid-level
baroclinic zone will be hung up in this area between the tropical
depression and an approaching upper trough from the northwest.
Continued feed of mid-level moisture and embedded shortwaves will
lead to periods of showers. Instability is relatively weak and
anticipate embedded thunder but not severe storms. Given all the
parameters (PWATs, Fgen, weak instability) thinking that Tuesday-
Tuesday night QPF up to an inch is reasonable, with only some
areas receiving a bit more. Impacts from this type of rainfall
(over a longer duration) should be only minor.

.LONG TERM...(Wednesday through Monday)
Issued at 215 PM CDT Mon Jun 8 2020

Much of this period appears relatively quiet and cooler with
minimal impacts as an upper ridge builds into the region. Active
weather returns by early next week, although how quickly this
happens is still uncertain and dependent on the strength of the
upper ridging.

Wednesday will be cloudy and cool with showers possible as the
upper trough behind the tropical depression swings through the
region.

&&

.AVIATION...(For the 00Z TAFS through 00Z Tuesday evening)
Issued at 644 PM CDT Mon Jun 8 2020

All sites are currently VFR, but there will continue to be
thunderstorms lifting across the region this evening and again
later tonight. Have mostly VCTS as storms will be hit and miss
through tonight. Some MVFR ceilings will be possible towards
morning at KBJI and perhaps KTVF, with some IFR not completely out
of the question. Ceilings will begin to improve tomorrow
afternoon although there will be some showers and thunderstorms
continuing to move through the area. Winds will shift around to
the northwest by the end of the period as a cold front pushes
through, with the ND airports seeing some gusts above 20 kts.

&&

.FGF WATCHES/WARNINGS/ADVISORIES...
ND...None.
MN...None.

UPDATE...JR
SHORT TERM...TG
LONG TERM...TG
AVIATION...JR

Hazardous weather outlook, Jun 8, 2:37 PM CDT, 6 hours 1 minute before

Hazardous Weather Outlook
National Weather Service Grand Forks ND
237 PM CDT Mon Jun 8 2020

MNZ001>009-013>017-022>024-027>032-040-NDZ008-016-026>030-038-039-
049-052>054-091945-
West Polk-Norman-Clay-Kittson-Roseau-Lake Of The Woods-
West Marshall-East Marshall-North Beltrami-Pennington-Red Lake-
East Polk-North Clearwater-South Beltrami-Mahnomen-
South Clearwater-Hubbard-West Becker-East Becker-Wilkin-
West Otter Tail-East Otter Tail-Wadena-Grant-Pembina-
Eastern Walsh-Nelson-Grand Forks-Griggs-Steele-Traill-Barnes-Cass-
Ransom-Sargent-Richland-Western Walsh-
237 PM CDT Mon Jun 8 2020

This hazardous weather outlook is for portions of eastern North
Dakota, west central and northwest Minnesota.

.DAY ONE...This Afternoon and Tonight

Numerous severe thunderstorms are expected to develop across
northeast North Dakota by 4pm, and then move east into northwest
Minnesota by late afternoon, exiting by early evening. Very large
hail greater than 2 inches along with a possible tornado will be
the initial threat, with a transition to a damaging wind threat as
the activity moves into Minnesota.

Additional numerous severe thunderstorms are expected to develop
across the southern Red River Valley into west central Minnesota
this evening, mainly after 6pm. Activity will become more
widespread after 9pm. Clusters of storms will bring primarily a
damaging wind threat to this area, continuing until well after
midnight.

Excessive rainfall is possible, especially for areas that have
seen high rain totals over the past couple days.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Showers with embedded Thunderstorms are expected on Tuesday,
mainly within the Red River Valley into Minnesota. Minor impacts
from excessive rainfall may be possible.

.SPOTTER INFORMATION STATEMENT...

Storm spotters will be needed today into the overnight hours.

NDZ006-007-014-015-024-091945-
Towner-Cavalier-Benson-Ramsey-Eddy-
237 PM CDT Mon Jun 8 2020

This hazardous weather outlook is for portions of eastern North
Dakota.

.DAY ONE...This Afternoon and Tonight

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter spotters will not be needed today.

In the hours before

Local storm report, Jun 8, 6:01 PM CDT, 2 hours 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS ND
601 PM CDT MON JUN 8 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1015 PM     TSTM WND GST     HORACE                  46.76N 96.90W
06/07/2020  E60 MPH          CASS               ND   TRAINED SPOTTER

            A FEW LARGE BRANCHES BROKEN DOWN.

&&

GGUST

Local storm report, Jun 8, 6:03 PM CDT, 2 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS ND
603 PM CDT MON JUN 8 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0524 PM     HAIL             4 W EMERADO             47.92N 97.45W
06/08/2020  E1.75 INCH       Grand Forks        ND   PUBLIC

&&

GGUST

Local storm report, Jun 8, 6:08 PM CDT, 2 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS ND
608 PM CDT MON JUN 8 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0602 PM     HAIL             5 S ALVARADO            48.12N 97.00W
06/08/2020  E1.00 INCH       Polk               MN   PUBLIC

            ALONG WITH HEAVY RAIN.

&&

GGUST

Local storm report, Jun 8, 7:29 PM CDT, 1 hour 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
729 PM CDT MON JUN 8 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0726 PM     TORNADO          4 E MIDDLE RIVER        48.44N 96.07W
06/08/2020                   Marshall           MN   STORM CHASER

            TORNADO GOING UP AND DOWN

&&

KNUTSVIG

Special weather statement, Jun 8, 8:12 PM CDT, 26 minutes before

Special Weather Statement
National Weather Service Grand Forks ND
812 PM CDT Mon Jun 8 2020

MNZ005-006-090200-
Roseau MN-Lake Of The Woods MN-
812 PM CDT Mon Jun 8 2020

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN ROSEAU AND WEST CENTRAL
LAKE OF THE WOODS COUNTIES UNTIL 900 PM CDT...

At 811 PM CDT, Doppler radar was tracking a strong thunderstorm over
western Hayes Lake State Park, or 17 miles southeast of Roseau,
moving northeast at 40 mph.

Nickel size hail will be possible with this storm.

This strong thunderstorm will be near...
  Swift and Warroad around 840 PM CDT.
  Roosevelt around 845 PM CDT.
  Arnesen around 855 PM CDT.
  Long Point, Lude and Birch Beach around 900 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Grand Forks.

&&

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
north central and northwestern Minnesota.

LAT...LON 4911 9505 4891 9477 4854 9549 4864 9572
      4900 9521 4900 9515 4904 9515
TIME...MOT...LOC 0111Z 226DEG 38KT 4863 9554

VG

Local storm report, Jun 8, 8:25 PM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS ND
825 PM CDT MON JUN 8 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0545 PM     HAIL             2 NW MANVEL             48.09N 97.21W
06/08/2020  E1.00 INCH       GRAND FORKS        ND   PUBLIC

            DIME TO QUARTER SIZED HAIL AND 60 MPH WINDS.

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 7:29 PM CDT	Tornado Warning Tornado observed	FGF	Marshall, Roseau	31 min
Jun 8, 8:12 PM CDT	Special Weather Statement	FGF	Lake of the Woods	48 min
Jun 8, 8:17 PM CDT	Severe Thunderstorm Warning	FGF	Lake of the Woods, Roseau	43 min
Jun 8, 8:20 PM CDT	Tornado Warning	FGF	Marshall, Pennington, Red Lake	25 min
Jun 8, 9:17 PM CDT	Severe Thunderstorm Warning	FGF	Marshall, Roseau	43 min
Jun 8, 9:27 PM CDT	Severe Thunderstorm Warning	FGF	Lake of the Woods	18 min
Jun 8, 9:52 PM CDT	Severe Thunderstorm Warning	FGF	Lake of the Woods, Roseau	23 min
Jun 8, 10:58 PM CDT	Severe Thunderstorm Warning	FGF	Lake of the Woods	33 min
Jun 8, 11:06 PM CDT	Special Weather Statement	FGF	Wadena	24 min
Jun 8, 11:41 PM CDT	Special Weather Statement	FGF	Wadena	19 min
Jun 9, 12:10 AM CDT	Special Weather Statement	FGF	Otter Tail	35 min
Jun 9, 12:18 AM CDT	Severe Thunderstorm Warning	FGF	Otter Tail	42 min
Jun 9, 12:43 AM CDT	Special Weather Statement	FGF	Hubbard	62 min
Jun 9, 1:09 AM CDT	Special Weather Statement	FGF	Wilkin	66 min
Jun 9, 1:18 AM CDT	Special Weather Statement	FGF	Wadena	57 min
Jun 9, 1:21 AM CDT	Severe Thunderstorm Warning	FGF	Hubbard, Wadena	39 min
Jun 9, 1:31 AM CDT	Severe Thunderstorm Warning	FGF	Hubbard, Wadena	27 min
Jun 9, 1:52 AM CDT	Special Weather Statement	FGF	Becker	53 min
Jun 9, 2:05 AM CDT	Severe Thunderstorm Warning	FGF	Grant, Otter Tail, Wilkin	55 min
Jun 9, 2:16 AM CDT	Special Weather Statement	FGF	Grant, Otter Tail, Wilkin	59 min
Jun 9, 2:27 AM CDT	Severe Thunderstorm Warning	FGF	Grant, Otter Tail, Wilkin	48 min
Jun 9, 3:03 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Otter Tail, Wadena	26 min
Jun 9, 3:27 AM CDT	Special Weather Statement	FGF	Becker, Hubbard, Wadena	48 min
Jun 9, 4:49 AM CDT	Special Weather Statement	FGF	Beltrami	56 min
Jun 9, 12:57 PM CDT	Areal Flood Warning	FGF	Kittson	21 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2020 Every severe thunderstorm warning in 2020

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.