Alert archive / Minnesota / Tornado Warnings in 2017

Tornado Warning 41, NWS Grand Forks, ND

September 19, 2017Norman County, Polk County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Sep 19, 2017, 7:23 PM CDT for Norman County, Polk County, Minnesota. It was in force for 52 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: Sep 19, 2017, 7:23 PM CDT (00:23 UTC)
Expired: Sep 19, 2017, 8:15 PM CDT
In force: 52 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Norman County, MN, Polk County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 53 km from the middle of the area, began a volume at 00:25 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
Sep 19, 7:50 PM CDT	TORNADO 1	3 Nne Lockhart, MN	THE TORNADO TRACKED INTERMITTENTLY NORTHWARD ALONG THE HIGHWAY 9 CORRIDOR FOR ABOUT 4 MILES AND ENDED JUST PAST THE COMMUNITY OF BELTRAMI BY 801 PM CDT. AS THE NASCENT TORNADO CROSSED FROM NORMAN COUNTY INTO POLK COUNTY DEBRIS BROKE WINDOWS IN A VEHICLE. THE T

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
Sep 19, 3:37 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 0.4 hours before the alert went out and 276 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: 77 J/kg
Mixed-layer CIN: -138 J/kg
Mixed-layer LCL: 861 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

941 
WFUS53 KFGF 200023
TORFGF
MNC107-119-200115-
/O.NEW.KFGF.TO.W.0041.170920T0023Z-170920T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Eastern ND/Grand Forks ND
723 PM CDT TUE SEP 19 2017

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  Northwestern Norman County in northwestern Minnesota...
  South central Polk County in northwestern Minnesota...

* Until 815 PM CDT.

* At 723 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Lockhart, or 38 miles north of Fargo, moving north
  at 30 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

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

* This dangerous storm will be near...
  Beltrami around 740 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4738 9662 4740 9675 4764 9673 4760 9642
TIME...MOT...LOC 0023Z 196DEG 26KT 4743 9665 

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

$$

TG

3 follow-up statements

385 
WWUS53 KFGF 200042
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
742 PM CDT TUE SEP 19 2017

MNC107-119-200115-
/O.CON.KFGF.TO.W.0041.000000T0000Z-170920T0115Z/
Norman MN-Polk MN-
742 PM CDT TUE SEP 19 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR
NORTHWESTERN NORMAN AND SOUTH CENTRAL POLK COUNTIES...
    
At 741 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Lockhart, or 38 miles southeast of Grand Forks,
moving north at 15 mph.

HAZARD...TORNADO. 

SOURCE...Radar indicated rotation. 

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

This dangerous storm will be near...
  Beltrami around 815 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4738 9662 4740 9675 4764 9673 4760 9642
TIME...MOT...LOC 0041Z 196DEG 12KT 4744 9664 

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

$$

TG

562 
WWUS53 KFGF 200049
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
749 PM CDT TUE SEP 19 2017

MNC107-119-200115-
/O.CON.KFGF.TO.W.0041.000000T0000Z-170920T0115Z/
Norman MN-Polk MN-
749 PM CDT TUE SEP 19 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR NORTH
CENTRAL NORMAN AND SOUTH CENTRAL POLK COUNTIES...
    
At 749 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Lockhart, or 35 miles southeast of Grand Forks,
moving north at 15 mph.

HAZARD...TORNADO. 

SOURCE...Radar indicated rotation. 

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

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4743 9657 4749 9674 4764 9673 4760 9642
TIME...MOT...LOC 0049Z 196DEG 14KT 4750 9662 

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

$$

TG

825 
WWUS53 KFGF 200100
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
800 PM CDT TUE SEP 19 2017

MNC107-200109-
/O.CAN.KFGF.TO.W.0041.000000T0000Z-170920T0115Z/
Norman MN-
800 PM CDT TUE SEP 19 2017

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

A tornado watch remains in effect until midnight CDT for northwestern
Minnesota.

LAT...LON 4756 9646 4750 9651 4750 9659 4751 9664
      4762 9659 4760 9642
TIME...MOT...LOC 0059Z 206DEG 15KT 4754 9653 

$$

MNC119-200115-
/O.CON.KFGF.TO.W.0041.000000T0000Z-170920T0115Z/
Polk MN-
800 PM CDT TUE SEP 19 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR
SOUTHWESTERN POLK COUNTY...
    
At 759 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Beltrami, or 36 miles southeast of Grand Forks,
moving northeast at 20 mph.

HAZARD...TORNADO. 

SOURCE...Radar indicated rotation. 

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

This tornadic thunderstorm will remain over mainly rural areas of
southwestern Polk County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4756 9646 4750 9651 4750 9659 4751 9664
      4762 9659 4760 9642
TIME...MOT...LOC 0059Z 206DEG 15KT 4754 9653 

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

$$

TG

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 19, 8:16 PM CDT	Tornado Warning	FGF	Polk, Red Lake	44 min
Sep 19, 8:57 PM CDT	Areal Flood Advisory	FGF	Norman	5 hr
Sep 19, 9:02 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater, Mahnomen, Pennington, Polk, Red Lake	58 min
Sep 19, 9:52 PM CDT	High Wind Warning	FGF	Kittson, Roseau	97 min
Sep 19, 10:10 PM CDT	Special Weather Statement	FGF	Wilkin	35 min
Sep 19, 10:13 PM CDT	Special Weather Statement	FGF	Clay, Norman	32 min
Sep 19, 10:49 PM CDT	Special Weather Statement	FGF	Becker, Clearwater, Mahnomen	26 min
Sep 19, 10:50 PM CDT	Special Weather Statement	FGF	Grant, Otter Tail	25 min
Sep 19, 11:02 PM CDT	Special Weather Statement	FGF	Beltrami, Clearwater	28 min
Sep 19, 11:17 PM CDT	Special Weather Statement	FGF	Becker, Otter Tail	28 min
Sep 19, 11:18 PM CDT	Special Weather Statement	FGF	Clearwater, Mahnomen	27 min
Sep 19, 11:32 PM CDT	Special Weather Statement	FGF	Beltrami, Clearwater	58 min
Sep 19, 11:46 PM CDT	Severe Thunderstorm Warning	FGF	Grant, Otter Tail	44 min
Sep 19, 11:49 PM CDT	Special Weather Statement	FGF	Becker, Clearwater, Hubbard	56 min
Sep 20, 12:26 AM CDT	Special Weather Statement	FGF	Otter Tail, Wadena	34 min

Nearby

Tornado Warnings in Minnesota, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.