Alert archive / North Dakota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 13, NWS Grand Forks, ND

June 9, 2017Benson County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 9, 2017, 6:48 PM CDT for Benson County, North Dakota. It was in force for 57 min. 10 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, 6:48 PM CDT (23:48 UTC)
Expired: Jun 9, 2017, 7:45 PM CDT
In force: 57 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Benson County, ND

The radar

The Minot AFB radar (KMBX), 99 km from the middle of the area, began a volume at 23:49 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, 7:08 PM CDT	TORNADO 2	6 Ssw Knox, ND	A TORNADO TRACKED IN AN EAST-SOUTHEAST DIRECTION ALONG A ROUGHLY 8 MILE INTERMITTENT TRACK TO AROUND 2 WNW OF HARLOW BY 720 PM CDT. THIS TORNADO AND CORRESPONDING REAR FLANK DOWNDRAFT WIND PRODUCED WIDESPREAD DUST WHICH GREATLY REDUCED VISIBILITY. NUMEROUS ASH
Jun 9, 7:18 PM CDT	TSTM WND GST 56	1 N Baker, ND	PEAK WINDS MEASURED AT THE BAKER NDAWN.
Jun 9, 7:18 PM CDT	TORNADO	2 W Harlow, ND	BRIEF TOUCHDOWN NOTED WEST OF HARLOW.
Jun 9, 7:19 PM CDT	TSTM WND GST 119	13 Nne Esmond, ND	MEASURED ON MOBILE MESONET EQUIPMENT.
Jun 9, 7:19 PM CDT	TSTM WND GST 119	3 Wnw Harlow, ND	MEASURED ON MOBILE MESONET EQUIPMENT.
Jun 9, 7:20 PM CDT	TSTM WND GST 70	4 Ne Baker, ND	LARGE PINE TREE BLOWN DOWN.
Jun 9, 7:24 PM CDT	HAIL 1.25	4 Nw Harlow, ND	REPORTED 3 ENE BAKER
Jun 9, 7:34 PM CDT	TORNADO 0	3 S Brinsmade, ND	A TORNADO TRACKED EASTWARD OVER LARGELY OPEN COUNTRY FOR NEARLY 2 MILES TO AROUND 4 NNW OF MINNEWAUKAN BY AROUND 737 PM CDT. THE GROUND SWIRL OF THIS TORNADO WAS VIDEOED BY STORM CHASERS NEAR THE WEST BAY OF DEVILS LAKE THOUGH VERY DUSTY CONDITION MADE DETECTI
Jun 9, 7:35 PM CDT	HAIL 0.88	1 W Leeds, ND	HAIL COVERING THE GROUND, RANGING FROM PEA TO NICKEL SIZE, ALSO REPORTED SEEING WALL CLOUD TO THE SOUTH FROM THAT POINT AROUND 0730 PM CDT
Jun 9, 7:35 PM CDT	HAIL 2	1 E Leeds, ND

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, 11.8 hours before the alert went out and 185 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.

815 
WUUS53 KFGF 092348
SVRFGF
NDC005-100045-
/O.NEW.KFGF.SV.W.0013.170609T2348Z-170610T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Eastern ND/Grand Forks ND
648 PM CDT FRI JUN 9 2017

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Western Benson County in northeastern North Dakota...

* Until 745 PM CDT.

* At 647 PM CDT, a severe thunderstorm was located near Silva, or 45
  miles southeast of Bottineau, moving east at 30 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* This severe thunderstorm will be near...
  Fillmore around 705 PM CDT. 
  Baker around 715 PM CDT. 
  Harlow around 730 PM CDT. 
  Brinsmade around 745 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4837 9984 4837 9920 4834 9920 4791 9934
      4810 9985
TIME...MOT...LOC 2347Z 286DEG 28KT 4826 9996 

HAIL...1.00IN
WIND...60MPH
 
$$

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, 6:38 PM CDT	Tornado Warning	FGF	Cavalier, Pembina	37 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2017 Every severe thunderstorm warning 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.