Alert archive / Minnesota / Tornado Warnings in 2018

Tornado Warning 17, NWS Grand Forks, ND

June 29, 2018Mahnomen County, Norman County, Polk County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jun 29, 2018, 4:32 AM CDT for Mahnomen County, Norman County, Polk County, Minnesota. It was in force for 28 min. 5 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, 4:32 AM CDT (09:32 UTC)
Expired: Jun 29, 2018, 5:00 AM CDT
In force: 28 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated

Counties Mahnomen County, MN, Norman County, MN, Polk County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 75 km from the middle of the area, began a volume at 09:32 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, 4:41 AM CDT	TSTM WND DMG	3 Nnw Fertile, MN	NUMEROUS LARGE POPLAR AND BOX ELDER TREE SNAPS EVIDENT IN SHELTER BELTS AND GROVES IN SOUTHEAST ONSTAD AND WESTERN GARFIELD TOWNSHIPS. TIME ESTIMATED BASED ON RADAR.
Jun 29, 4:49 AM CDT	TSTM WND DMG	1 W Rindal, MN	SIDING RIPPED OFF FAABERG LUTHERAN CHURCH. LOTS OF UP TO 3 INCH DIAMETER BRANCHES DOWN. POWER OUT FOR SEVERAL HOURS.
Jun 29, 4:49 AM CDT	TSTM WND DMG	Rindal, MN	SIDING RIPPED OFF FAABERG LUTHERAN CHURCH. LOTS OF UP TO 3 INCH DIAMETER BRANCHES DOWN. POWER OUT FOR SEVERAL HOURS.
Jun 29, 4:54 AM CDT	TORNADO	2 Wnw Winger, MN	THIS TORNADO WAS LIKELY WRAPPED IN DOWNBURST WINDS AND HEAVY RAIN FOR MOST OF ITS PATH. IT TRACKED NEARLY DUE EAST AT ABOUT 60 MPH, FOR AT LEAST 15 MILES, AND ENDED ROUGHLY 2 MILES ESE OF FOSSTON BY 509 PM CDT. IT TORE DOWN TREES IN SHELTER BELTS, TORE ROOFING
Jun 29, 4:56 AM CDT	TORNADO 1	2 Sse Erskine, MN	A TORNADO WHICH WAS PARTIALLY WRAPPED IN DOWNBURST WINDS AND HEAVY RAIN LIKELY TRACKED FOR ROUGHLY 2.5 MLES TO THE EAST AND LIFTED BY 459 PM CDT. THIS TORNADO SNAPPED VARIOUS HARDWOOD AND PINE TREES AT ONE FARMSTEAD. AFTER CROSSING HIGHWAY 2, ROUGHLY 2 MILES E

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, 9.5 hours before the alert went out and 254 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.

123 
WFUS53 KFGF 290932
TORFGF
MNC087-107-119-291000-
/O.NEW.KFGF.TO.W.0017.180629T0932Z-180629T1000Z/

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

The National Weather Service in Grand Forks has issued a

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

* Until 500 AM CDT.
    
* At 432 AM CDT, a severe thunderstorm capable of producing a tornado
  was located over Beltrami, or 38 miles southeast of Grand Forks,
  moving east at 55 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

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

* This dangerous storm will be near...
  Fertile and Flaming around 445 AM CDT.
  Rindal and Ranum around 450 AM CDT.
  Winger and Bejou around 500 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 4746 9656 4755 9659 4765 9597 4744 9596
TIME...MOT...LOC 0932Z 264DEG 47KT 4750 9651 

TORNADO...RADAR INDICATED
HAIL...<.75

$$

Knutsvig

1 follow-up statement

542 
WWUS53 KFGF 290944
SVSFGF

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

MNC087-107-119-291000-
/O.CON.KFGF.TO.W.0017.000000T0000Z-180629T1000Z/
Norman MN-Polk MN-Mahnomen MN-
444 AM CDT FRI JUN 29 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 AM CDT FOR
NORTHEASTERN NORMAN...SOUTH CENTRAL POLK AND NORTHWESTERN MAHNOMEN
COUNTIES...
    
At 443 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Fertile, or 41 miles south of Thief River Falls,
moving east at 55 mph.

HAZARD...TORNADO.

SOURCE...Radar indicated rotation.

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

This dangerous storm will be near...
  Rindal and Ranum around 450 AM CDT.
  Winger and Bejou around 500 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 4746 9634 4756 9638 4765 9597 4744 9596
TIME...MOT...LOC 0943Z 264DEG 47KT 4752 9628 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

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, 4:42 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, 4:59 AM CDT	Tornado Warning	FGF	Clearwater, Polk	31 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.