Alert archive / North Dakota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 3, NWS Grand Forks, ND

June 2, 2017Benson County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 2, 2017, 4:48 PM CDT for Benson County, North Dakota. It was in force for 57 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: Jun 2, 2017, 4:48 PM CDT (21:48 UTC)
Expired: Jun 2, 2017, 5:45 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), 109 km from the middle of the area, began a volume at 21:51 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 2, 4:55 PM CDT	HAIL 1	9 Wsw Maddock, ND	LOTS OF DIME TO QUARTER SIZED HAIL COVERED THE GROUND.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 9.8 hours before the alert went out and 154 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: 378 J/kg
Mixed-layer CIN: -285 J/kg
Mixed-layer LCL: 1681 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

840 
WUUS53 KFGF 022148
SVRFGF
NDC005-022245-
/O.NEW.KFGF.SV.W.0003.170602T2148Z-170602T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Eastern ND/Grand Forks ND
448 PM CDT FRI JUN 2 2017

The National Weather Service in Grand Forks has issued a

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

* Until 545 PM CDT.

* At 447 PM CDT, a severe thunderstorm was located near Wellsburg, or
  40 miles southwest of Devils Lake, moving east at 20 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...
  Maddock around 520 PM CDT. 
  Flora around 530 PM CDT. 
  Oberon around 545 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4785 9980 4795 9979 4812 9924 4785 9920
TIME...MOT...LOC 2147Z 251DEG 16KT 4788 9969 

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

Voelker

1 follow-up statement

229 
WWUS53 KFGF 022219
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
519 PM CDT FRI JUN 2 2017

NDC005-022245-
/O.CON.KFGF.SV.W.0003.000000T0000Z-170602T2245Z/
Benson ND-
519 PM CDT FRI JUN 2 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHWESTERN BENSON COUNTY...

At 517 PM CDT, a severe thunderstorm was located near Maddock, or 32
miles southwest of Devils Lake, moving east at 20 mph.

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

SOURCE...Public reported 1 inch hail 9 miles southwest of Maddock 
         at 455 pm CDT. 
         

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

This severe storm will be near...
  Flora around 535 PM CDT. 
  Oberon around 545 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4785 9964 4799 9963 4812 9924 4785 9920
TIME...MOT...LOC 2217Z 251DEG 16KT 4792 9952 

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

Voelker

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 2, 4:05 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey, Towner	55 min
Jun 2, 4:15 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Ramsey, Towner	60 min
Jun 2, 5:03 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Cavalier, Ramsey, Towner	57 min
Jun 2, 5:44 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	45 min
Jun 2, 5:56 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Ramsey, Towner	64 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.