Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 83, NWS Grand Forks, ND

August 9, 2021Cavalier County, Ramsey County, Towner County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 9, 2021, 7:04 PM CDT for Cavalier County, Ramsey County, Towner County, North Dakota. It was in force for 56 min. 4 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: Aug 9, 2021, 7:04 PM CDT (00:04 UTC)
Expired: Aug 9, 2021, 8:00 PM CDT
In force: 56 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Cavalier County, ND, Ramsey County, ND, Towner County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 153 km from the middle of the area, began a volume at 00:08 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
Aug 9, 7:16 PM CDT	TORNADO 1	5 W Starkweather, ND	A TORNADO TOUCHED DOWN IN NORTHEAST COOLIN TOWNSHIP AND TRACKED INTERMITTENTLY TO THE NORTHEAST FOR ROUGHLY 4 MILES TO AROUND 4 NW STARKWEATHER IN WESTCENTRAL KLINGSTRUP TOWNSHIP /RAMSEY COUNTY/ BY 723 PM CDT. THE TORNADO SNAPPED OR UPROOTED SEVERAL LARGE COTT
Aug 9, 7:27 PM CDT	HAIL 1.25	2 S Starkweather, ND	QUARTER TO HALF DOLLAR SIZED HAIL FOR A FEW MINUTES.
Aug 9, 7:40 PM CDT	TSTM WND GST 50	1 Se Hampden, ND	PEAK WIND MEASURED AT A RAWS STATION. TIME ESTIMATED BASED ON RADAR.
Aug 9, 7:45 PM CDT	TSTM WND GST 50	1 Se Hampden, 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
Aug 9, 4:01 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.1 hours before the alert went out and 246 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: 296 J/kg
Mixed-layer CIN: -462 J/kg
Mixed-layer LCL: 1238 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: -40 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

999 
WUUS53 KFGF 100004
SVRFGF
NDC019-071-095-100100-
/O.NEW.KFGF.SV.W.0083.210810T0004Z-210810T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
704 PM CDT Mon Aug 9 2021

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Southeastern Towner County in northeastern North Dakota...
  Cavalier County in northeastern North Dakota...
  Northern Ramsey County in northeastern North Dakota...

* Until 800 PM CDT.

* At 704 PM CDT, a severe thunderstorm was located 7 miles west of
  Starkweather, or 25 miles north of Devils Lake, moving northeast at
  50 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...
  Starkweather around 710 PM CDT.
  Calio around 720 PM CDT.

Other locations in the path of this severe thunderstorm include
Alsen, Munich, Hampden, Loma, Dresden and Langdon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4900 9856 4865 9795 4854 9822 4855 9832
      4850 9832 4820 9907 4831 9920 4837 9920
      4837 9927 4841 9932
TIME...MOT...LOC 0004Z 229DEG 41KT 4847 9903 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Lee

1 follow-up statement

534 
WWUS53 KFGF 100045
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
745 PM CDT Mon Aug 9 2021

NDC019-071-095-100100-
/O.CON.KFGF.SV.W.0083.000000T0000Z-210810T0100Z/
Towner ND-Cavalier ND-Ramsey ND-
745 PM CDT Mon Aug 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR SOUTHEASTERN TOWNER...CAVALIER AND NORTHERN RAMSEY COUNTIES...

At 745 PM CDT, a severe thunderstorm was located near Dresden, or
near Langdon, moving northeast at 45 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
  Langdon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This thunderstorm is capable of producing all types of severe weather
including extremely large hail, destructive straight line winds and
tornadoes. Move quickly to a safe shelter, such as an interior room,
a bathroom or closet or basement.

&&

LAT...LON 4900 9856 4865 9795 4854 9822 4855 9832
      4850 9832 4829 9886 4833 9906 4846 9926
TIME...MOT...LOC 0045Z 229DEG 41KT 4878 9849 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Lynch

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 7:11 PM CDT	Tornado Warning	FGF	Cavalier, Ramsey, Towner	34 min
Aug 9, 7:29 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	Eddy, Griggs, Nelson	46 min
Aug 9, 7:57 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina, Ramsey, Walsh	63 min
Aug 9, 8:08 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson	27 min
Aug 9, 8:12 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	Eddy, Griggs, Nelson	63 min
Aug 9, 8:28 PM CDT	Tornado Warning	FGF	Griggs, Nelson	32 min
Aug 9, 8:52 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina	38 min
Aug 9, 9:09 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	Grand Forks, Griggs, Nelson, Steele	66 min
Aug 9, 9:20 PM CDT	Tornado Warning	FGF	Grand Forks, Nelson, Steele	40 min
Aug 9, 9:42 PM CDT	Tornado Warning	FGF	Grand Forks	48 min
Aug 9, 9:54 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	Grand Forks, Steele	66 min
Aug 9, 10:08 PM CDT	Special Weather Statement	FGF	Pembina	52 min
Aug 9, 10:30 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	Grand Forks, Steele, Traill	30 min
Aug 9, 10:42 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FGF	Grand Forks, Traill	63 min

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.