Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 122, NWS Bismarck, ND

August 9, 2021Wells County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 9, 2021, 5:23 PM CDT for Wells County, North Dakota. It was in force for 52 min. 2 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, 5:23 PM CDT (22:23 UTC)
Expired: Aug 9, 2021, 6:15 PM CDT
In force: 52 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Damage threat: Considerable
Hail: 1.75 in
Wind: 60.0 mph

County Wells County, ND

The radar

The Minot AFB radar (KMBX), 120 km from the middle of the area, began a volume at 22:22 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, 5:29 PM CDT	HAIL 1.75	1 W Fessenden, ND	DELAYED REPORT FROM LATE MONDAY AFTERNOON.
Aug 9, 5:40 PM CDT	HAIL 2.75	Fessenden, ND	MOSTLY PING PONG BALLS AND GOLF BALLS WITH A FEW BASEBALLS MIXED IN. TIME ESTIMATED FROM 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 12:00Z, 10.4 hours before the alert went out and 129 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: 851 J/kg
Mixed-layer CIN: -361 J/kg
Mixed-layer LCL: 1736 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

110 
WUUS53 KBIS 092223
SVRBIS
NDC103-092315-
/O.NEW.KBIS.SV.W.0122.210809T2223Z-210809T2315Z/

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

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Northern Wells County in south central North Dakota...

* Until 615 PM CDT.

* At 522 PM CDT, a severe thunderstorm was located 7 miles west of
  Fessenden, or 9 miles southeast of Harvey, moving northeast at 45
  mph.

  HAZARD...Golf 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 remain over mainly rural areas of
  northern Wells County, including the following locations...
  Hamberg, Manfred, Heimdal, Wellsburg and Bremen.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4747 9987 4754 10000 4785 9989 4785 9931
      4784 9929 4775 9930
TIME...MOT...LOC 2222Z 211DEG 38KT 4768 9978 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

TELKEN

2 follow-up statements

303 
WWUS53 KBIS 092234
SVSBIS

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

NDC103-092315-
/O.CON.KBIS.SV.W.0122.000000T0000Z-210809T2315Z/
Wells ND-
534 PM CDT Mon Aug 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR NORTHEASTERN WELLS COUNTY...

At 534 PM CDT, a severe thunderstorm was located 10 miles north of
Fessenden, or 11 miles east of Harvey, 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.

Locations impacted include...
Fessenden, Heimdal, Bremen, Manfred, Hamberg and Wellsburg. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4748 9984 4785 9989 4785 9931 4784 9929
      4775 9930
TIME...MOT...LOC 2234Z 211DEG 38KT 4779 9968 

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

$$

TELKEN

110 
WWUS53 KBIS 092252
SVSBIS

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

NDC103-092315-
/O.CON.KBIS.SV.W.0122.000000T0000Z-210809T2315Z/
Wells ND-
552 PM CDT Mon Aug 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR NORTHEASTERN WELLS COUNTY...

At 552 PM CDT, a severe thunderstorm was located over Maddock, or 22
miles northeast of Harvey, 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.

Locations impacted include...
Fessenden, Heimdal, Bremen, Manfred, Hamberg and Wellsburg. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4785 9981 4785 9931 4784 9929 4775 9930
      4752 9976
TIME...MOT...LOC 2252Z 211DEG 38KT 4796 9953 

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 8, 10:10 PM CDT	Special Weather Statement	BIS	Golden Valley, Slope	50 min
Aug 9, 3:55 AM CDT	Fire Weather Watch	BIS	Adams, Bowman, Hettinger, Slope	24 hr
Aug 9, 2:15 PM CDT	Special Weather Statement	BIS	Ward	45 min
Aug 9, 2:49 PM CDT	Special Weather Statement	BIS	Renville	41 min
Aug 9, 5:29 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Kidder, Wells	46 min
Aug 9, 5:53 PM CDT	Special Weather Statement	BIS	Rolette	37 min
Aug 9, 6:02 PM CDT	Severe Thunderstorm Warning Destructive damage threat	BIS	Foster, Wells	43 min
Aug 9, 6:10 PM CDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce	35 min
Aug 9, 6:43 PM CDT	Severe Thunderstorm Warning Considerable damage threat	BIS	Foster	47 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.