Alert archive / Minnesota / Tornado Warnings in 2017

Tornado Warning 33, NWS Grand Forks, ND

July 11, 2017Pennington County, Polk County, Red Lake County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jul 11, 2017, 7:47 PM CDT for Pennington County, Polk County, Red Lake County, Minnesota. It was in force for 27 min. 3 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: Jul 11, 2017, 7:47 PM CDT (00:47 UTC)
Expired: Jul 11, 2017, 8:14 PM CDT
In force: 27 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Pennington County, MN, Polk County, MN, Red Lake County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 86 km from the middle of the area, began a volume at 00:48 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, 7:54 PM CDT	FUNNEL CLOUD	3 Ne Euclid, MN	PERSISTENT ALL CLOUD WITH POSSIBLE FUNNEL.
Jul 11, 7:54 PM CDT	FUNNEL CLOUD	4 Ne Euclid, MN	PERSISTENT WALL CLOUD WITH POSSIBLE FUNNEL.
Jul 11, 8:15 PM CDT	HAIL 1	2 Ne Dorothy, MN

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
Jul 11, 4:48 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 0.8 hours before the alert went out and 242 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 841 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 374 m²/s²
0-3 km storm-relative helicity: 636 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

942 
WFUS53 KFGF 120047
TORFGF
MNC113-119-125-120130-
/O.NEW.KFGF.TO.W.0033.170712T0047Z-170712T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Eastern ND/Grand Forks ND
747 PM CDT TUE JUL 11 2017

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  Northwestern Red Lake County in northwestern Minnesota...
  North central Polk County in northwestern Minnesota...
  Western Pennington County in northwestern Minnesota...

* Until 830 PM CDT.

* At 746 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Angus, or 21 miles west of Thief River Falls,
  moving east at 30 mph.

  HAZARD...Tornado and quarter size hail. 

  SOURCE...Radar indicated rotation. 

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

* This dangerous storm will be near...
  Carpenters Corner around 805 PM CDT. 
  Wylie around 815 PM CDT. 
  St. Hilaire and Hazel around 830 PM CDT. 

Other locations impacted by this tornadic thunderstorm include Thief
River Falls Airport.

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 4801 9673 4817 9678 4817 9608 4786 9604
TIME...MOT...LOC 0046Z 279DEG 24KT 4806 9663 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Gust

2 follow-up statements

782 
WWUS53 KFGF 120108
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
808 PM CDT TUE JUL 11 2017

MNC113-119-125-120130-
/O.CON.KFGF.TO.W.0033.000000T0000Z-170712T0130Z/
Red Lake MN-Polk MN-Pennington MN-
808 PM CDT TUE JUL 11 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
NORTHWESTERN RED LAKE...NORTH CENTRAL POLK AND WESTERN PENNINGTON
COUNTIES...
    
At 807 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Wylie, or 14 miles southwest of Thief River Falls,
moving east at 25 mph.

HAZARD...TORNADO and quarter size hail. 

SOURCE...Radar indicated rotation. 

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

This dangerous storm will be near...
  Wylie around 820 PM CDT. 
  St. Hilaire and Hazel around 830 PM CDT. 

Other locations impacted by this tornadic thunderstorm include Thief
River Falls Airport.

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 4799 9662 4817 9665 4817 9608 4786 9604
TIME...MOT...LOC 0107Z 288DEG 23KT 4802 9644 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Gust

521 
WWUS53 KFGF 120114
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
814 PM CDT TUE JUL 11 2017

MNC113-119-125-120124-
/O.CAN.KFGF.TO.W.0033.000000T0000Z-170712T0130Z/
Red Lake MN-Polk MN-Pennington MN-
814 PM CDT TUE JUL 11 2017

...THE TORNADO WARNING FOR NORTHWESTERN RED LAKE...NORTH CENTRAL POLK
AND WESTERN PENNINGTON COUNTIES 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 tornado watch remains in effect until 1100 PM CDT for northwestern
Minnesota.

LAT...LON 4799 9662 4817 9665 4817 9608 4786 9604
TIME...MOT...LOC 0113Z 279DEG 24KT 4801 9637 

$$

Gust

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 7:02 PM CDT	Tornado Warning	FGF	Polk	43 min
Jul 11, 7:12 PM CDT	Severe Thunderstorm Warning	FGF	Marshall, Polk	36 min
Jul 11, 7:19 PM CDT	Tornado Warning Tornado observed	FGF	Norman, Polk	41 min
Jul 11, 7:59 PM CDT	Tornado Warning	FGF	Clay, Norman, Polk	46 min
Jul 11, 8:19 PM CDT	Severe Thunderstorm Warning	FGF	Pennington, Polk, Red Lake	56 min
Jul 11, 8:34 PM CDT	Tornado Warning	FGF	Becker, Clay, Mahnomen, Norman	41 min
Jul 11, 9:14 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Mahnomen, Norman, Otter Tail	61 min
Jul 11, 9:25 PM CDT	Severe Thunderstorm Warning	FGF	Grant	35 min
Jul 11, 9:43 PM CDT	Severe Thunderstorm Warning	FGF	Grant, Otter Tail	62 min
Jul 11, 10:08 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Hubbard, Otter Tail, Wadena	67 min
Jul 11, 10:38 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Otter Tail	67 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.