Alert archive / Minnesota / Tornado Warnings in 2020

Tornado Warning 25, NWS Grand Forks, ND

August 7, 2020Becker County, Hubbard County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Aug 7, 2020, 7:21 PM CDT for Becker County, Hubbard County, Minnesota. It was in force for 39 min. 6 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
Aug 7, 2020, 7:21 PM CDT (00:21 UTC)
Expired
Aug 7, 2020, 8:00 PM CDT
In force
39 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.25 in

Counties Becker County, MN, Hubbard County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 176 km from the middle of the area, began a volume at 00:22 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

TimeReportWhereRemark
Aug 7, 7:30 PM CDTTORNADO 03 Wnw Park Rapids, MNVIDEO AND SPOTTER REPORTS OF SUSTAINED WALL CLOUD WITH MULTIPLE FUNNELS AND MULTIPLE BRIEF TOUCHDOWNS OVER FEW MINUTE PERIOD WEST OF FISHHOOK LAKE AND NEAR HWY 71. SPOTTERS AND EMERGENCY MANAGEMENT REPORT SOME LARGE BRANCHES BROKEN BUT OTHERWISE MINIMAL DAMAGE
Aug 7, 7:30 PM CDTTORNADO1 Nnw Park Rapids, MNPOSSIBLE TORNADO TOUCHDOWN WEST SIDE OF FISHHOOK LAKE NEAR HWY 71. VIDEO AND NUMEROUS PICTURES WOULD INDICATE TOUCHDOWN, BUT IN ALL PICTURES THE VERY BOTTOM IS OBSCURED BY TREES. NO DAMAGE REPORTS HAVE BEEN RECEIVED.
Aug 7, 7:35 PM CDTFUNNEL CLOUD1 Nw Park Rapids, MN
Aug 7, 7:45 PM CDTTSTM WND DMG5 Nne Park Rapids, MNNUMEROUS TREES BLOWN DOWN ACROSS SOUTHERN EMMA TOWNSHIP FROM POTATOE LAKE INTO BIG SAND LAKE.
Aug 7, 7:50 PM CDTHAIL 1.5Dorset, MN
Aug 7, 8:05 PM CDTTORNADO 13 W Nevis, MNA TORNADO LIKELY WRAPPED IN HEAVY RAIN AND DOWN BURST WINDS TRACKED FOR ROUGHLY 6 MILES TO AROUND 3 ESE OF NEVIS BY 825 PM CDT. IT CROSSED PORTIONS OF SHALLOW LAKE, THE NORTH END OF LAKE BELLE TAINE, AND THE SOUTH END OF EIGHTH CROW WING LAKE WHERE IN SNAPPED

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.

IssuedProductOfficeLasted
Aug 7, 3:52 PM CDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 0.4 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-pSkew-T log-p diagram, International Fa, MN at 00:00Z on 2020-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 677 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 00:00Z on 2020-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
677 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
1011 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
62 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

995 
WFUS53 KFGF 080021
TORFGF
MNC005-057-080100-
/O.NEW.KFGF.TO.W.0025.200808T0021Z-200808T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Grand Forks ND
721 PM CDT Fri Aug 7 2020

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  Southwestern Hubbard County in north central Minnesota...
  East central Becker County in northwestern Minnesota...

* Until 800 PM CDT.
    
* At 721 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Osage, or 29 miles east of Detroit Lakes, moving
  east at 25 mph.

  HAZARD...Tornado and half dollar size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Park Rapids around 740 PM CDT.
  Dorset around 755 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4688 9536 4700 9534 4704 9488 4686 9487
TIME...MOT...LOC 0021Z 273DEG 22KT 4695 9524 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

DJR
2 follow-up statements
794 
WWUS53 KFGF 080034
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
734 PM CDT Fri Aug 7 2020

MNC005-057-080100-
/O.CON.KFGF.TO.W.0025.000000T0000Z-200808T0100Z/
Hubbard MN-Becker MN-
734 PM CDT Fri Aug 7 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR
SOUTHWESTERN HUBBARD AND EAST CENTRAL BECKER COUNTIES...
        
At 734 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Park Rapids, or 33 miles east of Detroit Lakes,
moving east at 25 mph.

HAZARD...Tornado and half dollar size hail.

SOURCE...Weather spotters reported a funnel cloud.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Park Rapids around 745 PM CDT.
  Dorset around 800 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4688 9528 4701 9526 4704 9488 4686 9487
TIME...MOT...LOC 0034Z 272DEG 20KT 4693 9515 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

DJR
431 
WWUS53 KFGF 080051
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
751 PM CDT Fri Aug 7 2020

MNC005-080101-
/O.CAN.KFGF.TO.W.0025.000000T0000Z-200808T0100Z/
Becker MN-
751 PM CDT Fri Aug 7 2020

...THE TORNADO WARNING FOR EAST CENTRAL BECKER COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
north central and northwestern Minnesota.

LAT...LON 4686 9487 4687 9516 4697 9516 4698 9517
      4702 9517 4704 9488
TIME...MOT...LOC 0051Z 266DEG 17KT 4694 9504 

$$

MNC057-080100-
/O.CON.KFGF.TO.W.0025.000000T0000Z-200808T0100Z/
Hubbard MN-
751 PM CDT Fri Aug 7 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR
SOUTHWESTERN HUBBARD COUNTY...
        
At 751 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Park Rapids, or 38 miles south of Bemidji, moving
east at 20 mph.

HAZARD...Tornado and half dollar size hail.

SOURCE...Law enforcement reported a funnel cloud.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Dorset around 805 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4686 9487 4687 9516 4697 9516 4698 9517
      4702 9517 4704 9488
TIME...MOT...LOC 0051Z 266DEG 17KT 4694 9504 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

DJR

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 7:00 PM CDTSpecial Weather StatementFGFHubbard15 min
Aug 7, 7:44 PM CDTSpecial Weather StatementFGFHubbard31 min
Aug 7, 7:53 PM CDTTornado WarningFGFHubbard52 min
Aug 7, 8:47 PM CDTSevere Thunderstorm WarningFGFHubbard13 min
Aug 7, 9:00 PM CDTSevere Thunderstorm WarningFGFHubbard60 min
Aug 8, 1:58 AM CDTSevere Thunderstorm WarningFGFKittson62 min
Aug 8, 5:18 AM CDTSevere Thunderstorm WarningFGFLake of the Woods27 min
Aug 8, 9:22 AM CDTSpecial Weather StatementFGFBeltrami53 min
Aug 8, 9:27 AM CDTSpecial Weather StatementFGFBeltrami63 min
Aug 8, 10:17 AM CDTSpecial Weather StatementFGFClearwater58 min
Aug 8, 10:39 AM CDTSevere Thunderstorm WarningFGFBeltrami, Hubbard51 min
Aug 8, 11:16 AM CDTSpecial Weather StatementFGFHubbard59 min
Aug 8, 11:38 AM CDTSevere Thunderstorm WarningFGFHubbard52 min
Aug 8, 12:27 PM CDTSevere Thunderstorm WarningFGFHubbard48 min
Aug 8, 12:30 PM CDTSpecial Weather StatementFGFHubbard60 min
Aug 8, 1:10 PM CDTSevere Thunderstorm WarningFGFBecker, Hubbard44 min

Nearby

Tornado Warnings in Minnesota, 2020Every tornado warning in 2020Tornadoes 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.