Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 100, NWS Grand Forks, ND

August 22, 2021Eddy County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 22, 2021, 5:58 PM CDT for Eddy County, North Dakota. It was in force for 47 min. 3 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 22, 2021, 5:58 PM CDT (22:58 UTC)
Expired: Aug 22, 2021, 6:45 PM CDT
In force: 47 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Damage threat: Considerable
Hail: 2.0 in
Wind: 60.0 mph

County Eddy County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 121 km from the middle of the area, began a volume at 23:01 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 22, 6:01 PM CDT	HAIL 1	3 Se New Rockford, ND	CORRECTS PREVIOUS HAIL REPORT FROM 3 SE NEW ROCKFORD. PEAS TO QUARTERS (REPORT TRANSMITTED VIA EM).
Aug 22, 6:05 PM CDT	HAIL 1	4 Se New Rockford, ND	PEA TO QUARTER SIZED HAIL.
Aug 22, 6:30 PM CDT	HAIL 1	3 Se New Rockford, ND	PEAS TO QUARTERS (REPORT TRANSMITTED VIA EM).

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 22, 3:36 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.0 hours before the alert went out and 167 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: 1536 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 311 m²/s²
0-3 km storm-relative helicity: 445 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

976 
WUUS53 KFGF 222258
SVRFGF
NDC027-222345-
/O.NEW.KFGF.SV.W.0100.210822T2258Z-210822T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
558 PM CDT Sun Aug 22 2021

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Southern Eddy County in northeastern North Dakota...

* Until 645 PM CDT.

* At 558 PM CDT, a severe thunderstorm was located over Barlow, or 39
  miles south of Devils Lake, moving northeast at 45 mph.

  HAZARD...Two inch hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Brantford around 610 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4771 9899 4771 9855 4759 9884 4759 9925
TIME...MOT...LOC 2258Z 240DEG 38KT 4756 9911 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

DJR

2 follow-up statements

397 
WWUS53 KFGF 222314
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
614 PM CDT Sun Aug 22 2021

NDC027-222345-
/O.CON.KFGF.SV.W.0100.000000T0000Z-210822T2345Z/
Eddy ND-
614 PM CDT Sun Aug 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR SOUTHEASTERN EDDY COUNTY...

At 614 PM CDT, a severe thunderstorm was located over Brantford, or
34 miles south of Devils Lake, moving northeast at 30 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.

This severe storm will be near...
  Brantford around 615 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4771 9899 4771 9855 4759 9884 4759 9913
TIME...MOT...LOC 2314Z 238DEG 28KT 4762 9897 

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

$$

DJR

593 
WWUS53 KFGF 222328
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
628 PM CDT Sun Aug 22 2021

NDC027-222345-
/O.CON.KFGF.SV.W.0100.000000T0000Z-210822T2345Z/
Eddy ND-
628 PM CDT Sun Aug 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR SOUTHEASTERN EDDY COUNTY...

At 628 PM CDT, a severe thunderstorm was located near Brantford, or
32 miles south of Devils Lake, moving northeast at 30 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.

This severe thunderstorm will remain over mainly rural areas of
southeastern Eddy County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4771 9894 4771 9855 4759 9884 4759 9904
TIME...MOT...LOC 2328Z 240DEG 24KT 4765 9889 

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

$$

DJR

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 10:01 AM CDT	Wind Advisory	FGF	Barnes, Benson, Cass, Cavalier, Eddy, Grand Forks and 11 more	10 hr
Aug 22, 4:19 PM CDT	Severe Thunderstorm Warning	FGF	Benson	41 min
Aug 22, 4:25 PM CDT	Tornado Warning	FGF	Benson	35 min
Aug 22, 6:37 PM CDT	Severe Thunderstorm Warning	FGF	Eddy, Nelson	40 min
Aug 22, 6:48 PM CDT	Severe Thunderstorm Warning	FGF	Griggs	57 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.