Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 36, NWS Grand Forks, ND

June 11, 20215 counties in North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 11, 2021, 4:07 AM CDT for 5 counties in North Dakota. It was in force for 38 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 11, 2021, 4:07 AM CDT (09:07 UTC)
Expired: Jun 11, 2021, 4:45 AM CDT
In force: 38 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Barnes County, ND, Cass County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND

The radar

The Aberdeen radar (KABR), 109 km from the middle of the area, began a volume at 09:07 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 11, 4:25 AM CDT	TSTM WND GST 59	Gwinner, ND	59MPH GUST IN GWINNER AP ND FROM AWOS.
Jun 11, 4:25 AM CDT	TSTM WND GST 72	2 W Lisbon, ND	72 MPH GUST REPORTED BY NDAWN IN LISBON ND.
Jun 11, 4:25 AM CDT	TSTM WND GST 72	2 W Lisbon, ND	PEAK WIND MEASURED AT AN NDAWN STATION AT 3 METERS.
Jun 11, 4:30 AM CDT	HAIL 1.75	Fort Ransom, ND	RELAYED VIA SOCIAL MEDIA; SIZE ESTIMATED FROM IMAGE; TIME ESTIMATED FROM RADAR.
Jun 11, 4:30 AM CDT	HAIL 1.75	Fort Ransom, ND	REPORT AND PHOTO POSTED VIA SOCIAL MEDIA. TIME ESTIMATED BASED ON RADAR.
Jun 11, 4:35 AM CDT	TSTM WND GST 59	1 Se Gwinner, ND	PEAK WIND MEASURED AT THE GWINNER AIRPORT /KGWR/.
Jun 11, 4:55 AM CDT	TSTM WND GST 67	6 N Mcleod, ND	PEAK WIND MEASURED AT A RAWS STATION. TIME ESTIMATED BASED ON RADAR.

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 11, 1:58 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 9.1 hours before the alert went out and 169 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: 1337 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 2725 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

293 
WUUS53 KFGF 110907
SVRFGF
NDC003-017-073-077-081-110945-
/O.NEW.KFGF.SV.W.0036.210611T0907Z-210611T0945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
407 AM CDT Fri Jun 11 2021

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Ransom County in southeastern North Dakota...
  Southwestern Cass County in southeastern North Dakota...
  Southern Barnes County in southeastern North Dakota...
  Western Richland County in southeastern North Dakota...
  Sargent County in southeastern North Dakota...

* Until 445 AM CDT.

* At 407 AM CDT, severe thunderstorms were located along a line
  extending from near Valley City to near Straubville, moving east at
  60 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Casselton, Lisbon, Enderlin, Gwinner, Milnor, Lidgerwood and
  Forman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4593 9801 4628 9801 4628 9803 4663 9803
      4663 9843 4680 9844 4698 9718 4593 9707
TIME...MOT...LOC 0907Z 264DEG 51KT 4688 9796 4597 9796 

HAIL...0.75IN
WIND...60MPH
 
$$

Lynch

1 follow-up statement

490 
WWUS53 KFGF 110933
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
433 AM CDT Fri Jun 11 2021

NDC003-017-073-077-081-110945-
/O.CON.KFGF.SV.W.0036.000000T0000Z-210611T0945Z/
Ransom ND-Cass ND-Barnes ND-Richland ND-Sargent ND-
433 AM CDT Fri Jun 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 AM CDT
FOR RANSOM...SOUTHWESTERN CASS...SOUTHERN BARNES...WESTERN RICHLAND
AND SARGENT COUNTIES...

At 433 AM CDT, severe thunderstorms were located along a line
extending from near Wheatland to Lake Traverse Reservation, moving
east at 60 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Casselton, Lisbon, Enderlin, Gwinner, Milnor, Lidgerwood and Forman. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4593 9801 4628 9801 4628 9803 4663 9803
      4663 9843 4680 9844 4698 9718 4593 9707
TIME...MOT...LOC 0933Z 264DEG 51KT 4692 9744 4601 9745 

HAIL...0.75IN
WIND...70MPH
 
$$

Lynch

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 3:23 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Griggs, Nelson, Ramsey, Steele	67 min
Jun 11, 3:36 AM CDT	Special Weather Statement	FGF	Barnes, Griggs, Steele	54 min
Jun 11, 3:48 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Griggs, Steele	57 min
Jun 11, 4:11 AM CDT	Special Weather Statement	FGF	Benson, Cavalier, Pembina, Ramsey, Towner, Walsh	64 min
Jun 11, 4:19 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Grand Forks, Nelson, Steele, Traill, Walsh	56 min
Jun 11, 4:28 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Griggs, Nelson, Ramsey, Steele	62 min
Jun 11, 4:36 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Nelson, Pembina, Ramsey, Towner, Walsh	54 min
Jun 11, 4:42 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom, Richland, Sargent	63 min
Jun 11, 4:47 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Griggs, Steele	28 min
Jun 11, 5:07 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Grand Forks, Nelson, Steele, Traill, Walsh	68 min
Jun 11, 5:27 AM CDT	Special Weather Statement	FGF	Cavalier, Pembina, Ramsey, Towner, Walsh	33 min
Jun 11, 5:39 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	66 min
Jun 11, 9:57 AM CDT	Wind Advisory	FGF	Barnes, Benson, Cavalier, Eddy, Griggs, Nelson and 4 more	11 hr

Nearby

Severe Thunderstorm Warnings in North Dakota, 2021 Every severe thunderstorm warning in 2021

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.