Alert archive / Minnesota / Tornado Warnings in 2018

Tornado Warning 23, NWS Grand Forks, ND

July 8, 2018Becker County, Otter Tail County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jul 8, 2018, 7:02 PM CDT for Becker County, Otter Tail County, Minnesota. It was in force for 43 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: Jul 8, 2018, 7:02 PM CDT (00:02 UTC)
Expired: Jul 8, 2018, 7:45 PM CDT
In force: 43 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

Counties Becker County, MN, Otter Tail County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 161 km from the middle of the area, began a volume at 00:01 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 8, 7:12 PM CDT	TSTM WND DMG	5 N Perham, MN	A FEW LARGE TREE BRANCHES AND LIMBS DOWN AROUND THE NORTH SIDE OF LITTLE PINE LAKE.

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 8, 3:52 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.0 hours before the alert went out and 256 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: 95 J/kg
Mixed-layer CIN: -247 J/kg
Mixed-layer LCL: 1776 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

595 
WFUS53 KFGF 090002
TORFGF
MNC005-111-090045-
/O.NEW.KFGF.TO.W.0023.180709T0002Z-180709T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Eastern ND/Grand Forks ND
702 PM CDT SUN JUL 8 2018

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  North central Otter Tail County in west central Minnesota...
  South central Becker County in northwestern Minnesota...

* Until 745 PM CDT.
    
* At 701 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Frazee, or 10 miles southeast of Detroit Lakes,
  moving east at 25 mph.

  HAZARD...Tornado and half dollar size hail.

  SOURCE...Radar indicated rotation.

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

* This dangerous storm will be near...
  Perham around 720 PM CDT.
  Evergreen around 725 PM CDT.
  Butler 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 4666 9578 4679 9572 4675 9529 4654 9543
TIME...MOT...LOC 0001Z 288DEG 20KT 4670 9569 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

DJR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 7:11 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Otter Tail	22 min
Jul 8, 7:20 PM CDT	Tornado Warning	FGF	Otter Tail	40 min
Jul 8, 7:21 PM CDT	Special Weather Statement	FGF	Wilkin	39 min
Jul 8, 7:27 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Hubbard, Otter Tail, Wadena	63 min
Jul 8, 7:37 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Wilkin	23 min
Jul 8, 8:04 PM CDT	Severe Thunderstorm Warning	FGF	Otter Tail	26 min
Jul 8, 8:26 PM CDT	Severe Thunderstorm Warning	FGF	Otter Tail, Wadena	34 min
Jul 8, 8:36 PM CDT	Severe Thunderstorm Warning	FGF	Otter Tail	24 min
Jul 8, 8:59 PM CDT	Special Weather Statement	FGF	Otter Tail, Wadena	61 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.