Alert archive / Minnesota / Tornado Warnings in 2018

Tornado Warning 18, NWS Grand Forks, ND

June 29, 2018Clearwater County, Polk County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jun 29, 2018, 4:59 AM CDT for Clearwater County, Polk County, Minnesota. It was in force for 31 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: Jun 29, 2018, 4:59 AM CDT (09:59 UTC)
Expired: Jun 29, 2018, 5:30 AM CDT
In force: 31 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Clearwater County, MN, Polk County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 123 km from the middle of the area, began a volume at 09:57 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
Jun 29, 5:10 AM CDT	TSTM WND DMG	Fosston, MN	LARGE TREE BRANCHES AND LIMBS DOWN AROUND TOWN. FENCING BLOWN DOWN IN PLACES. POWER OUTAGE BEGAN PRIOR TO STORM HITTING FOSSTON.
Jun 29, 5:15 AM CDT	TSTM WND DMG	1 N Bagley, MN	FOUR WHEEL UTILITY WAGON TURNED OVER. REPORTED VIA SOCIAL MEDIA. TIME ESTIMATED ON RADAR.
Jun 29, 5:20 AM CDT	TSTM WND DMG	2 N Bagley, MN	FOUR WHEEL UTILITY WAGON TURNED OVER. REPORTED VIA SOCIAL MEDIA. TIME ESTIMATED ON RADAR.

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
Jun 28, 10:54 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 10.0 hours before the alert went out and 210 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: 968 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1276 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.5

Open this sounding in Storm Lab

The text

As transmitted.

016 
WFUS53 KFGF 290959
TORFGF
MNC029-119-291030-
/O.NEW.KFGF.TO.W.0018.180629T0959Z-180629T1030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Eastern ND/Grand Forks ND
459 AM CDT FRI JUN 29 2018

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  Southeastern Polk County in northwestern Minnesota...
  Central Clearwater County in northwestern Minnesota...

* Until 530 AM CDT.
    
* At 459 AM CDT, a severe thunderstorm capable of producing a tornado
  was located over Winger, or 40 miles south of Thief River Falls,
  moving east at 60 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...
  Fosston around 510 AM CDT.
  Lengby around 515 AM CDT.
  Weme around 520 AM CDT.
  Bagley around 525 AM CDT.
  Leonard and Shevlin around 530 AM 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 4750 9598 4760 9599 4770 9526 4751 9525
TIME...MOT...LOC 0959Z 262DEG 52KT 4755 9595 

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

$$

Knutsvig

3 follow-up statements

001 
WWUS53 KFGF 291006
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
506 AM CDT FRI JUN 29 2018

MNC029-119-291030-
/O.CON.KFGF.TO.W.0018.000000T0000Z-180629T1030Z/
Polk MN-Clearwater MN-
506 AM CDT FRI JUN 29 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 AM CDT FOR
SOUTHEASTERN POLK AND CENTRAL CLEARWATER COUNTIES...
    
At 506 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Fosston, or 40 miles west of Bemidji, moving east at
60 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...
  Lengby around 510 AM CDT.
  Weme around 515 AM CDT.
  Bagley around 520 AM CDT.
  Leonard and Shevlin around 525 AM 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 4751 9582 4762 9583 4770 9526 4751 9525
TIME...MOT...LOC 1006Z 261DEG 58KT 4757 9573 

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

$$

Knutsvig

881 
WWUS53 KFGF 291020
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
520 AM CDT FRI JUN 29 2018

MNC119-291029-
/O.CAN.KFGF.TO.W.0018.000000T0000Z-180629T1030Z/
Polk MN-
520 AM CDT FRI JUN 29 2018

...THE TORNADO WARNING FOR SOUTHEASTERN POLK 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 800 AM CDT for
northwestern Minnesota.

LAT...LON 4755 9549 4763 9551 4770 9526 4754 9525
TIME...MOT...LOC 1019Z 262DEG 52KT 4760 9544 

$$

MNC029-291030-
/O.CON.KFGF.TO.W.0018.000000T0000Z-180629T1030Z/
Clearwater MN-
520 AM CDT FRI JUN 29 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 AM CDT FOR CENTRAL
CLEARWATER COUNTY...
    
At 519 AM CDT, a severe thunderstorm capable of producing a tornado
was located near Bagley, or 27 miles west of Bemidji, moving east at
60 mph.

HAZARD...TORNADO.

SOURCE...Radar indicated rotation.

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

This dangerous storm will be near...
  Leonard around 530 AM 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 4755 9549 4763 9551 4770 9526 4754 9525
TIME...MOT...LOC 1019Z 262DEG 52KT 4760 9544 

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

$$

Knutsvig

958 
WWUS53 KFGF 291028
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
528 AM CDT FRI JUN 29 2018

MNC029-291038-
/O.EXP.KFGF.TO.W.0018.000000T0000Z-180629T1030Z/
Clearwater MN-
528 AM CDT FRI JUN 29 2018

...THE TORNADO WARNING FOR CENTRAL CLEARWATER COUNTY WILL EXPIRE AT
530 AM CDT...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.

A Severe Thunderstorm Watch remains in effect until 800 AM CDT for
northwestern Minnesota.

LAT...LON 4755 9549 4763 9551 4770 9526 4754 9525
TIME...MOT...LOC 1028Z 262DEG 52KT 4761 9535 

$$

Knutsvig

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 3:51 AM CDT	Severe Thunderstorm Warning	FGF	Clay, Norman, Polk	54 min
Jun 29, 3:58 AM CDT	Severe Thunderstorm Warning	FGF	Marshall, Polk	47 min
Jun 29, 4:06 AM CDT	Severe Thunderstorm Warning	FGF	Clay, Otter Tail, Wilkin	54 min
Jun 29, 4:25 AM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater, Kittson, Marshall, Pennington, Polk and 2 more	65 min
Jun 29, 4:31 AM CDT	Tornado Warning	FGF	Norman	29 min
Jun 29, 4:32 AM CDT	Tornado Warning	FGF	Mahnomen, Norman, Polk	28 min
Jun 29, 4:42 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Clearwater, Mahnomen, Norman, Polk	63 min
Jun 29, 4:57 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Hubbard, Otter Tail, Wadena, Wilkin	63 min
Jun 29, 5:05 AM CDT	High Wind Warning	FGF	Kittson, Marshall	4 hr
Jun 29, 5:23 AM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater	67 min
Jun 29, 5:36 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Clearwater, Hubbard	54 min

Nearby

Tornado Warnings in Minnesota, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.