Alert archive / Minnesota / Tornado Warnings in 2020

Tornado Warning 11, NWS Grand Forks, ND

June 17, 2020Roseau County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jun 17, 2020, 6:07 PM CDT for Roseau County, Minnesota. It was in force for 13 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 17, 2020, 6:07 PM CDT (23:07 UTC)
Expired: Jun 17, 2020, 6:20 PM CDT
In force: 13 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.5 in

County Roseau County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 193 km from the middle of the area, began a volume at 23:05 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.

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 17, 5:21 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 11.1 hours before the alert went out and 180 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: 1121 J/kg
Mixed-layer CIN: -349 J/kg
Mixed-layer LCL: 1518 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 228 m²/s²
0-3 km storm-relative helicity: 228 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.9

Open this sounding in Storm Lab

The text

As transmitted.

216 
WFUS53 KFGF 172307
TORFGF
MNC135-180000-
/O.NEW.KFGF.TO.W.0011.200617T2307Z-200618T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Grand Forks ND
607 PM CDT Wed Jun 17 2020

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  North central Roseau County in northwestern Minnesota...

* Until 700 PM CDT.
    
* At 607 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Fox, or 8 miles southwest of Roseau, moving
  northeast at 30 mph.

  HAZARD...Tornado and ping pong ball size hail.

  SOURCE...Radar indicated rotation.

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

* Locations impacted include...
  Roseau, Salol, Fox, Ross and Badger. 

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 4889 9541 4874 9598 4882 9604 4900 9585
      4900 9551
TIME...MOT...LOC 2307Z 234DEG 27KT 4880 9593 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

CJ

1 follow-up statement

328 
WWUS53 KFGF 172320
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
620 PM CDT Wed Jun 17 2020

MNC135-172330-
/O.CAN.KFGF.TO.W.0011.000000T0000Z-200618T0000Z/
Roseau MN-
620 PM CDT Wed Jun 17 2020

...THE TORNADO WARNING FOR NORTH CENTRAL ROSEAU COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until midnight CDT for
northwestern Minnesota.

LAT...LON 4889 9541 4874 9598 4882 9604 4900 9585
      4900 9551
TIME...MOT...LOC 2318Z 234DEG 27KT 4886 9581 

$$

CJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 4:45 PM CDT	Severe Thunderstorm Warning	FGF	Kittson, Marshall, Roseau	60 min
Jun 17, 5:27 PM CDT	Tornado Warning	FGF	Roseau	48 min
Jun 17, 6:16 PM CDT	Special Weather Statement	FGF	Kittson	59 min
Jun 17, 6:45 PM CDT	Severe Thunderstorm Warning	FGF	Kittson, Marshall	60 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.