Alert archive / North Dakota / Tornado Warnings in 2017

Tornado Warning 12, NWS Grand Forks, ND

June 9, 2017Cavalier County, Pembina County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jun 9, 2017, 6:38 PM CDT for Cavalier County, Pembina County, North Dakota. It was in force for 37 min. 7 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 9, 2017, 6:38 PM CDT (23:38 UTC)
Expired: Jun 9, 2017, 7:15 PM CDT
In force: 37 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Cavalier County, ND, Pembina County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 144 km from the middle of the area, began a volume at 23:37 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 9, 6:45 PM CDT	TORNADO 2	8 Ene Langdon, ND	A TORNADO WAS PARTIALLY ENGULFED IN DOWNBURST WINDS AND HAIL AS IT TRACKED FOR NEARLY 20 MILES TO AROUND 3 MILES S OF MOUNTAIN BY 715 PM CDT. LARGE WOODEN POWER POLES WERE SNAPPED, ROOFING WAS STRIPPED OFF OF HOMES, STEEL POLE SHEDS WERE TOTALLY DIMANTLED, NUM
Jun 9, 6:52 PM CDT	HAIL 1	1 Nw Olga, ND
Jun 9, 7:00 PM CDT	TSTM WND DMG	4 Ne Milton, ND	LARGE PORTIONS OF ALMA AND EAST ALMA TOWNSHIPS WERE STRIPPED OF SMALL GRAIN AND BEAN CROPS BY EXTREME DOWNBURST WINDS AND WIND DRIVEN HAIL.
Jun 9, 7:02 PM CDT	HAIL 1	Concrete, ND
Jun 9, 7:10 PM CDT	TSTM WND GST 90	Mountain, ND	NUMEROUS LARGE TREE BRANCHES AND LIMBS BROKEN DOWN AROUND ACROSS MUCH OF THINGVALLA TOWNSHIP. SOME TREES SNAPPED. SHEET METAL ROOFING AND SHINGLES BLOWN OFF BUILDINGS IN VARIOUS LOCATIONS.
Jun 9, 7:15 PM CDT	TSTM WND DMG	15 E Langdon, ND	SEVERAL BUILDINGS DOWN,TYPE AND EXTENT OF DAMAGE UNKNOWN AT PRESENT.
Jun 9, 7:15 PM CDT	TSTM WND DMG	Milton, ND	EXTENSIVE DAMAGE IN MILTON. UNQUANTIFIED AT THIS TIME.

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 9, 4:58 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.6 hours before the alert went out and 297 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: 1764 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 310 m²/s²
0-3 km storm-relative helicity: 390 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

696 
WFUS53 KFGF 092338
TORFGF
NDC019-067-100015-
/O.NEW.KFGF.TO.W.0012.170609T2338Z-170610T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Eastern ND/Grand Forks ND
638 PM CDT FRI JUN 9 2017

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  Southeastern Cavalier County in northeastern North Dakota...
  West central Pembina County in northeastern North Dakota...

* Until 715 PM CDT.

* At 637 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles west of Olga, or 8 miles east of Langdon,
  moving southeast at 35 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...
  Osnabrock and Olga around 650 PM CDT. 
  Concrete and Milton around 700 PM CDT. 
  Mountain around 710 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 4874 9774 4854 9798 4880 9837 4889 9822
TIME...MOT...LOC 2337Z 304DEG 28KT 4879 9820 

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

$$

Knutsvig

1 follow-up statement

731 
WWUS53 KFGF 092356
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
656 PM CDT FRI JUN 9 2017

NDC019-067-100015-
/O.CON.KFGF.TO.W.0012.000000T0000Z-170610T0015Z/
Cavalier ND-Pembina ND-
656 PM CDT FRI JUN 9 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR EAST
CENTRAL CAVALIER AND WEST CENTRAL PEMBINA COUNTIES...
    
At 655 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Concrete, or 19 miles east of Langdon, moving east
at 35 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...
  Mountain around 705 PM 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 4859 9793 4874 9809 4882 9798 4874 9774
TIME...MOT...LOC 2355Z 288DEG 31KT 4875 9794 

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

$$

Knutsvig

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 5:34 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Towner	56 min
Jun 9, 5:37 PM CDT	Severe Thunderstorm Warning	FGF	Benson	53 min
Jun 9, 6:30 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Walsh	45 min
Jun 9, 6:48 PM CDT	Severe Thunderstorm Warning	FGF	Benson	57 min

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.