Alert archive / Minnesota / Tornado Warnings in 2020

Tornado Warning 23, NWS Grand Forks, ND

July 11, 2020Becker County, Clay County, Otter Tail County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jul 11, 2020, 1:07 PM CDT for Becker County, Clay County, Otter Tail County, Minnesota. It was in force for 38 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: Jul 11, 2020, 1:07 PM CDT (18:07 UTC)
Expired: Jul 11, 2020, 1:45 PM CDT
In force: 38 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Observed
Hail: 0.0 in

Counties Becker County, MN, Clay County, MN, Otter Tail County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 135 km from the middle of the area, began a volume at 18:09 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
Jul 11, 1:25 PM CDT	FUNNEL CLOUD	3 E Pelican Rapids, MN	FUNNEL VIEWED NEAR THE CLOUD BASE, LOOKING TOWARDS LAKE LIDA FROM PELICAN RAPIDS.

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

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 6.1 hours before the alert went out and 265 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: 550 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 1119 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

772 
WFUS53 KFGF 111807
TORFGF
MNC005-027-111-111845-
/O.NEW.KFGF.TO.W.0023.200711T1807Z-200711T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Grand Forks ND
107 PM CDT Sat Jul 11 2020

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  Eastern Clay County in northwestern Minnesota...
  Northwestern Otter Tail County in west central Minnesota...
  Southwestern Becker County in northwestern Minnesota...

* Until 145 PM CDT.

* At 107 PM CDT, a confirmed tornado was located near Cormorant, or
  14 miles southwest of Detroit Lakes, moving southeast at 15 mph.

  HAZARD...Tornado.

  SOURCE...Public confirmed tornado.

  IMPACT...Expect damage to mobile homes, roofs, and vehicles.

* The tornado will be near...
  Cormorant around 115 PM CDT.
  Dunvilla around 135 PM CDT.
  Pelican Rapids around 140 PM CDT.
  Northwestern Lake Lida around 145 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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 4653 9608 4675 9625 4682 9611 4665 9589
TIME...MOT...LOC 1807Z 321DEG 13KT 4672 9613 

TORNADO...OBSERVED
HAIL...0.00IN

$$

Knutsvig

2 follow-up statements

789 
WWUS53 KFGF 111826
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
126 PM CDT Sat Jul 11 2020

MNC005-027-111835-
/O.CAN.KFGF.TO.W.0023.000000T0000Z-200711T1845Z/
Clay MN-Becker MN-
126 PM CDT Sat Jul 11 2020

...THE TORNADO WARNING FOR EASTERN CLAY AND SOUTHWESTERN BECKER
COUNTIES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 4653 9608 4667 9613 4670 9604 4665 9589
TIME...MOT...LOC 1825Z 327DEG 13KT 4662 9603 

$$

MNC111-111845-
/O.CON.KFGF.TO.W.0023.000000T0000Z-200711T1845Z/
Otter Tail MN-
126 PM CDT Sat Jul 11 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 145 PM CDT FOR
NORTHWESTERN OTTER TAIL COUNTY...
        
At 125 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Dunvilla, or 16 miles southwest of Detroit Lakes,
moving southeast at 15 mph.

HAZARD...TORNADO.

SOURCE...Weather spotters reported a funnel cloud.

IMPACT...Expect damage to mobile homes, roofs, and vehicles.

This dangerous storm will be near...
  Northwestern Lake Lida around 145 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 4653 9608 4667 9613 4670 9604 4665 9589
TIME...MOT...LOC 1825Z 327DEG 13KT 4662 9603 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

Knutsvig

998 
WWUS53 KFGF 111843
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
143 PM CDT Sat Jul 11 2020

MNC111-111853-
/O.EXP.KFGF.TO.W.0023.000000T0000Z-200711T1845Z/
Otter Tail MN-
143 PM CDT Sat Jul 11 2020

...THE TORNADO WARNING FOR NORTHWESTERN OTTER TAIL COUNTY WILL EXPIRE
AT 145 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.

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

LAT...LON 4653 9608 4667 9613 4670 9604 4665 9589
TIME...MOT...LOC 1843Z 321DEG 13KT 4657 9597 

$$

Knutsvig

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 12:08 PM CDT	Special Weather Statement	FGF	Otter Tail	67 min
Jul 11, 2:27 PM CDT	Special Weather Statement	FGF	Grant	48 min

Nearby

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