Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 100, NWS Bismarck, ND

July 8, 2021Adams County, Grant County, Hettinger County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 8, 2021, 8:42 PM MDT for Adams County, Grant County, Hettinger County, North Dakota. It was in force for 63 min. 1 report 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: Jul 8, 2021, 8:42 PM MDT (02:42 UTC)
Expired: Jul 8, 2021, 9:45 PM MDT
In force: 63 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Tornado: Possible
Hail: 1.5 in
Wind: 70.0 mph

Counties Adams County, ND, Grant County, ND, Hettinger County, ND

The radar

The Bismarck radar (KBIS), 108 km from the middle of the area, began a volume at 02:45 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
Jul 8, 8:44 PM MDT	TSTM WND GST 60	Mott, ND	60 MPH WINDS ESTIMATED IN TOWN. 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
Jul 8, 3:38 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.7 hours before the alert went out and 111 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: 624 J/kg
Mixed-layer CIN: -153 J/kg
Mixed-layer LCL: 1380 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: -41 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.8

Open this sounding in Storm Lab

The text

As transmitted.

575 
WUUS53 KBIS 090242
SVRBIS
NDC001-037-041-090345-
/O.NEW.KBIS.SV.W.0100.210709T0242Z-210709T0345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
842 PM MDT Thu Jul 8 2021

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Southeastern Hettinger County in southwestern North Dakota...
  Southwestern Grant County in south central North Dakota...
  East central Adams County in southwestern North Dakota...

* Until 945 PM MDT.

* At 841 PM MDT, a severe thunderstorm was located 6 miles east of
  Mott, moving southeast at 45 mph.

  HAZARD...70 mph wind gusts and ping pong ball size hail.

  SOURCE...Public.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           considerable tree damage. Wind damage is also likely to 
           mobile homes, roofs, and outbuildings.

* This severe thunderstorm will remain over mainly rural areas of
  southeastern Hettinger, southwestern Grant and east central Adams 
  Counties, including the following locations... Burt, Bentley, and 
  New Leipzig.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

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, closet or basement.

&&

LAT...LON 4602 10157 4602 10161 4604 10163 4601 10165
      4603 10173 4603 10175 4604 10175 4603 10184
      4607 10185 4605 10197 4610 10249 4637 10250
      4653 10220 4606 10142 4605 10146 4606 10147
      4602 10150 4603 10153 4601 10155
TIME...MOT...LOC 0241Z 304DEG 41KT 4634 10219 

TORNADO...POSSIBLE
HAIL...1.50IN
WIND...70MPH
 
$$

GALE

3 follow-up statements

310 
WWUS53 KBIS 090302
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
902 PM MDT Thu Jul 8 2021

NDC001-037-041-090345-
/O.CON.KBIS.SV.W.0100.000000T0000Z-210709T0345Z/
Hettinger ND-Grant ND-Adams ND-
902 PM MDT Thu Jul 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM MDT
FOR SOUTHEASTERN HETTINGER...SOUTHWESTERN GRANT AND EAST CENTRAL
ADAMS COUNTIES...

At 901 PM MDT, a severe thunderstorm was located 11 miles south of
New Leipzig, or 15 miles southwest of Elgin, moving southeast at 45
mph.

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

SOURCE...Law enforcement.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
New Leipzig, Burt and Bentley. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4602 10157 4602 10161 4604 10163 4601 10165
      4603 10173 4603 10175 4604 10175 4603 10184
      4607 10185 4605 10197 4610 10249 4628 10250
      4640 10201 4606 10142 4605 10146 4606 10147
      4602 10150 4603 10153 4601 10155
TIME...MOT...LOC 0301Z 306DEG 38KT 4620 10200 

HAIL...1.00IN
WIND...70MPH
 
$$

GALE

872 
WWUS53 KBIS 090317
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
917 PM MDT Thu Jul 8 2021

NDC041-090326-
/O.CAN.KBIS.SV.W.0100.000000T0000Z-210709T0345Z/
Hettinger ND-
917 PM MDT Thu Jul 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HETTINGER COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM MDT for
south central and southwestern North Dakota.

LAT...LON 4602 10157 4602 10161 4604 10163 4601 10166
      4604 10175 4603 10184 4607 10185 4605 10197
      4610 10249 4621 10250 4621 10200 4626 10200
      4626 10198 4622 10180 4606 10142 4606 10147
      4602 10150 4603 10153 4601 10155
TIME...MOT...LOC 0316Z 305DEG 43KT 4613 10191 

$$

NDC001-037-090345-
/O.CON.KBIS.SV.W.0100.000000T0000Z-210709T0345Z/
Grant ND-Adams ND-
917 PM MDT Thu Jul 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM MDT
FOR SOUTHWESTERN GRANT AND EAST CENTRAL ADAMS COUNTIES...

At 916 PM MDT, a severe thunderstorm was located 13 miles north of
Thunder Hawk, or 17 miles northeast of Lemmon, moving southeast 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 remain over mainly rural areas of
southwestern Grant and east central Adams Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4602 10157 4602 10161 4604 10163 4601 10166
      4604 10175 4603 10184 4607 10185 4605 10197
      4610 10249 4621 10250 4621 10200 4626 10200
      4626 10198 4622 10180 4606 10142 4606 10147
      4602 10150 4603 10153 4601 10155
TIME...MOT...LOC 0316Z 305DEG 43KT 4613 10191 

HAIL...1.00IN
WIND...60MPH
 
$$

GALE

048 
WWUS53 KBIS 090338
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
938 PM MDT Thu Jul 8 2021

NDC001-037-090348-
/O.EXP.KBIS.SV.W.0100.000000T0000Z-210709T0345Z/
Grant ND-Adams ND-
938 PM MDT Thu Jul 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN GRANT AND EAST
CENTRAL ADAMS COUNTIES WILL EXPIRE AT 945 PM MDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1000 PM MDT for
south central and southwestern North Dakota.

LAT...LON 4602 10157 4602 10161 4604 10163 4601 10166
      4604 10175 4603 10184 4607 10185 4605 10197
      4610 10249 4621 10250 4621 10200 4626 10200
      4626 10198 4622 10180 4606 10142 4606 10147
      4602 10150 4603 10153 4601 10155
TIME...MOT...LOC 0338Z 304DEG 41KT 4600 10163 

$$

GALE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 6:11 PM MDT	Severe Thunderstorm Warning	BIS	Billings, McKenzie	64 min
Jul 8, 6:14 PM MDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie, Mountrail	61 min
Jul 8, 6:29 PM MDT	Severe Thunderstorm Warning	BIS	Adams, Bowman	33 min
Jul 8, 6:44 PM MDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, Stark	61 min
Jul 8, 6:50 PM MDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, McKenzie	55 min
Jul 8, 6:58 PM MDT	Special Weather Statement	BIS	Burke, Mountrail, Renville, Ward	47 min
Jul 8, 8:01 PM MDT	Severe Thunderstorm Warning	BIS	Hettinger, Stark	59 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.