Alert archive / North Dakota / Tornado Warnings in 2017

Tornado Warning 27, NWS Grand Forks, ND

July 11, 2017Grand Forks County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 11, 2017, 6:01 PM CDT for Grand Forks County, North Dakota. It was in force for 44 min. 8 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, 6:01 PM CDT (23:01 UTC)
Expired: Jul 11, 2017, 6:45 PM CDT
In force: 44 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Grand Forks County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 48 km from the middle of the area, began a volume at 23:05 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, 6:03 PM CDT	HAIL 1.75	7 W Larimore, ND
Jul 11, 6:08 PM CDT	FUNNEL CLOUD	3 Sw Larimore, ND	WALL CLOUD REPORTED AROUND 558 PM CDT ABOUT 6W OF LARIMORE. SUBSEQUENT FUNNEL WAS REPORTED AND PHOTO POSTED TO SOCIAL MEDIA.
Jul 11, 6:12 PM CDT	TSTM WND DMG	N Larimore, ND	NUMEROUS LARGE TREE BRANCHES AND LIMBS BROKEN DOWN IN SHELTER BELTS ACROSS NORTHEAST ELM GROVE TOWNSHIP.
Jul 11, 6:15 PM CDT	HAIL 1	Larimore, ND	QUARTER SIZED HAIL REPORTED WITH PHOTO ON SOCIAL MEDIA. TIME ESTIMATED BASED ON RADAR.
Jul 11, 6:15 PM CDT	HAIL 1	Larimore, ND
Jul 11, 6:25 PM CDT	TORNADO 1	5 Nnw Northwood, ND	THIS PARTIALLY RAIN WRAPPED TORNADO TRACKED INTERMITTENTLY TO THE SOUTHEAST FOR NEARLY 5 MILES TO AROUND 3 ENE OF NORTHWOOD BY 640 PM CDT. THE TORNADO BROKE DOWN LARGE BRANCHES AND SNAPPED A FEW TREE TRUNKS IN SHELTER BELTS ALONG IT PATH. MAXIMUM WIDTH ESTIMAT
Jul 11, 6:25 PM CDT	TORNADO 1	5 Nnw Northwood, ND	THIS PARTIALLY RAIN WRAPPED TORNADO TRACKED INTERMITTENTLY TO THE SOUTHEAST FOR NEARLY 5 MILES TO AROUND 3 ENE OF NORTHWOOD BY 642 PM CDT. THE TORNADO BROKE DOWN LARGE BRANCHES AND SNAPPED A FEW TREE TRUNKS IN SHELTER BELTS ALONG IT PATH. MAXIMUM WIDTH ESTIMAT
Jul 11, 6:42 PM CDT	HAIL 1.75	7 Ene Northwood, ND	LARGE HAIL AND STRONG WINDS DAMAGED CROPS ACROSS SOUTHERN PLEASANT VIEW TOWNSHIP.

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

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.0 hours before the alert went out and 260 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: 34 J/kg
Mixed-layer CIN: -303 J/kg
Mixed-layer LCL: 2064 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

757 
WFUS53 KFGF 112301
TORFGF
NDC035-112345-
/O.NEW.KFGF.TO.W.0027.170711T2301Z-170711T2345Z/

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

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  Southwestern Grand Forks County in northeastern North Dakota...

* Until 645 PM CDT.

* At 600 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Larimore, or 31 miles west of Grand Forks, moving
  east at 25 mph.

  HAZARD...Tornado and quarter size hail. 

  SOURCE...Radar indicated rotation. A wall cloud was reported 6 
           miles west of Larimore at 557 PM CDT.

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

* This dangerous storm will be near...
  Larimore around 615 PM CDT. 
  Kempton around 620 PM CDT. 
  Turtle River State Park around 625 PM CDT. 
  Arvilla around 630 PM CDT. 
  Emerado around 640 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 4782 9788 4805 9784 4804 9733 4772 9740
TIME...MOT...LOC 2300Z 282DEG 21KT 4789 9775 

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

$$

JH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 5:09 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson	66 min
Jul 11, 5:15 PM CDT	Tornado Warning Tornado observed	FGF	Cavalier, Towner	45 min
Jul 11, 5:25 PM CDT	Tornado Warning	FGF	Walsh	50 min
Jul 11, 5:35 PM CDT	Tornado Warning	FGF	Grand Forks, Walsh	40 min
Jul 11, 5:45 PM CDT	Severe Thunderstorm Warning	FGF	Pembina, Walsh	60 min
Jul 11, 5:46 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	59 min
Jul 11, 5:48 PM CDT	Tornado Warning	FGF	Cavalier, Ramsey, Walsh	42 min
Jul 11, 6:16 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Walsh	44 min
Jul 11, 6:21 PM CDT	Tornado Warning	FGF	Grand Forks, Walsh	39 min
Jul 11, 6:27 PM CDT	Tornado Warning	FGF	Cavalier, Pembina, Walsh	48 min
Jul 11, 6:42 PM CDT	Tornado Warning	FGF	Grand Forks, Steele, Traill	48 min
Jul 11, 6:49 PM CDT	Areal Flood Advisory	FGF	Walsh	2 hr

Nearby

Tornado Warnings in North Dakota, 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.