Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 127, NWS Bismarck, ND

August 9, 2021Foster County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 9, 2021, 7:27 PM CDT for Foster County, North Dakota. It was in force for 48 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 9, 2021, 7:27 PM CDT (00:27 UTC)
Expired: Aug 9, 2021, 8:15 PM CDT
In force: 48 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Foster County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 119 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
Aug 9, 7:35 PM CDT	HAIL 1	5 Nnw Bordulac, ND
Aug 9, 8:08 PM CDT	HAIL 1.25	3 W Mchenry, ND	ONGOING AT TIME OF REPORT AND HAD BEEN ONGOING FOR APPROXIMATELY 10 MINUTES.
Aug 9, 8:23 PM CDT	HAIL 1	3 Ese Mchenry, ND	ALSO RECEIVED 1.00 IN OF RAIN.

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, 0.5 hours before the alert went out and 155 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.

395 
WUUS53 KBIS 100027
SVRBIS
NDC031-100115-
/O.NEW.KBIS.SV.W.0127.210810T0027Z-210810T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
727 PM CDT Mon Aug 9 2021

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Foster County in southeastern North Dakota...

* Until 815 PM CDT.

* At 726 PM CDT, a severe thunderstorm was located 5 miles northeast
  of Bordulac, or 9 miles east of Carrington, moving east at 50 mph.

  HAZARD...Ping pong ball size 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...
  Grace City around 735 PM CDT.
  Glenfield around 745 PM CDT.

Other locations in the path of this severe thunderstorm include
Mchenry.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4733 9910 4747 9919 4759 9901 4759 9850
      4733 9850
TIME...MOT...LOC 0026Z 248DEG 42KT 4746 9891 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

TELKEN

2 follow-up statements

722 
WWUS53 KBIS 100040
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
740 PM CDT Mon Aug 9 2021

NDC031-100115-
/O.CON.KBIS.SV.W.0127.000000T0000Z-210810T0115Z/
Foster ND-
740 PM CDT Mon Aug 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR FOSTER COUNTY...

At 739 PM CDT, a severe thunderstorm was located 5 miles east of
Grace City, or 20 miles east of Carrington, moving east at 50 mph.

HAZARD...Ping pong ball size 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 storm will be near...
  Glenfield and Mchenry around 745 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4737 9903 4747 9908 4759 9901 4759 9850
      4733 9850
TIME...MOT...LOC 0039Z 248DEG 42KT 4752 9869 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

TELKEN

224 
WWUS53 KBIS 100051
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
751 PM CDT Mon Aug 9 2021

NDC031-100115-
/O.CON.KBIS.SV.W.0127.000000T0000Z-210810T0115Z/
Foster ND-
751 PM CDT Mon Aug 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR NORTHEASTERN FOSTER COUNTY...

At 750 PM CDT, a severe thunderstorm was located near Mchenry, or 30
miles east of Carrington, moving east at 50 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 remain over mainly rural areas of
northeastern Foster County, including the following locations...
Juanita.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4741 9884 4747 9893 4758 9899 4759 9850
      4738 9850
TIME...MOT...LOC 0050Z 248DEG 42KT 4757 9850 

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

$$

TELKEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 7:35 PM CDT	Special Weather Statement	BIS	LaMoure	25 min
Aug 9, 7:51 PM CDT	Severe Thunderstorm Warning	BIS	LaMoure, Stutsman	24 min
Aug 9, 8:14 PM CDT	Severe Thunderstorm Warning	BIS	Foster	31 min
Aug 10, 4:02 AM CDT	Red Flag Warning	BIS	Adams, Billings, Bowman, Emmons, Golden Valley, Grant and 4 more	17 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.