Alert archive / North Dakota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 39, NWS Grand Forks, ND

June 13, 2017Ransom County, Sargent County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 13, 2017, 7:27 PM CDT for Ransom County, Sargent County, North Dakota. It was in force for 48 min. 2 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 13, 2017, 7:27 PM CDT (00:27 UTC)
Expired: Jun 13, 2017, 8:15 PM CDT
In force: 48 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Ransom County, ND, Sargent County, ND

The radar

The Aberdeen radar (KABR), 103 km from the middle of the area, began a volume at 00:31 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 13, 7:35 PM CDT	HAIL 1.25	1 S Brampton, ND	HAIL AND HEAVY RAIN.
Jun 13, 8:15 PM CDT	TSTM WND DMG	5 N Gwinner, ND	A FEW LARGE 4-6 INCH DIAMTER TREE LIMBS BROKEN DOWN.

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 13, 5:56 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.5 hours before the alert went out and 156 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: 118 J/kg
Mixed-layer CIN: -325 J/kg
Mixed-layer LCL: 1575 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 279 m²/s²
0-3 km storm-relative helicity: 479 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 10.8

Open this sounding in Storm Lab

The text

As transmitted.

883 
WUUS53 KFGF 140027
SVRFGF
NDC073-081-140115-
/O.NEW.KFGF.SV.W.0039.170614T0027Z-170614T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Eastern ND/Grand Forks ND
727 PM CDT TUE JUN 13 2017

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Southeastern Ransom County in southeastern North Dakota...
  Sargent County in southeastern North Dakota...

* Until 815 PM CDT.

* At 726 PM CDT, a severe thunderstorm was located over Brampton, or
  14 miles north of Britton, moving northeast at 25 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...
  Brampton around 730 PM CDT. 
  Cogswell around 745 PM CDT. 
  Forman around 755 PM CDT. 
  Stirum around 800 PM CDT. 
  Gwinner around 810 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4593 9801 4648 9775 4629 9728 4628 9728
      4628 9726 4625 9726 4593 9768
TIME...MOT...LOC 0026Z 211DEG 23KT 4598 9783 

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

Lee

1 follow-up statement

227 
WWUS53 KFGF 140048
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
748 PM CDT TUE JUN 13 2017

NDC073-081-140115-
/O.CON.KFGF.SV.W.0039.000000T0000Z-170614T0115Z/
Ransom ND-Sargent ND-
748 PM CDT TUE JUN 13 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR SOUTHEASTERN RANSOM AND SARGENT COUNTIES...

At 748 PM CDT, a severe thunderstorm was located near Cogswell, or 22
miles north of Britton, moving northeast at 45 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 storm will be near...
  Forman and Stirum around 750 PM CDT. 
  Gwinner around 755 PM CDT. 
  Milnor around 805 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4593 9801 4648 9775 4629 9728 4628 9728
      4628 9726 4625 9726 4593 9768
TIME...MOT...LOC 0048Z 210DEG 56KT 4611 9772 

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

Lee

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 7:11 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	49 min
Jun 13, 8:11 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland, Sargent	49 min
Jun 13, 8:14 PM CDT	Tornado Warning	FGF	Barnes, Cass, Ransom	31 min
Jun 13, 8:44 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Richland, Traill	46 min
Jun 13, 8:54 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	66 min
Jun 13, 9:24 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Grand Forks, Steele, Traill	41 min
Jun 13, 9:32 PM CDT	Areal Flood Advisory	FGF	Cass	2 hr

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.