Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 114, NWS Bismarck, ND

July 22, 20214 counties in North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 22, 2021, 4:12 PM MDT for 4 counties in 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 22, 2021, 4:12 PM MDT (22:12 UTC)
Expired: Jul 22, 2021, 5:15 PM MDT
In force: 63 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Adams County, ND, Bowman County, ND, Hettinger County, ND, Slope County, ND

The radar

The Bismarck radar (KBIS), 201 km from the middle of the area, began a volume at 22:13 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 22, 4:53 PM MDT	TSTM WND GST 60	1 Nnw Hettinger, ND	ASOS STATION KHEI HETTINGER AIRPORT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 10.2 hours before the alert went out and 205 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: 104 J/kg
Mixed-layer CIN: -415 J/kg
Mixed-layer LCL: 1354 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

319 
WUUS53 KBIS 222212
SVRBIS
NDC001-011-041-087-222315-
/O.NEW.KBIS.SV.W.0114.210722T2212Z-210722T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
412 PM MDT Thu Jul 22 2021

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Bowman County in southwestern North Dakota...
  Western Hettinger County in southwestern North Dakota...
  Slope County in southwestern North Dakota...
  Western Adams County in southwestern North Dakota...

* Until 515 PM MDT.

* At 411 PM MDT, severe thunderstorms were located along a line
  extending from 11 miles northwest of New England to 10 miles north
  of Ludlow, moving southeast at 20 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  New England and Regent.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4595 10395 4663 10348 4663 10241 4595 10249
TIME...MOT...LOC 2211Z 306DEG 19KT 4664 10305 4598 10335 

HAIL...0.75IN
WIND...70MPH
 
$$

ANGLIN

4 follow-up statements

407 
WWUS53 KBIS 222234
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
434 PM MDT Thu Jul 22 2021

NDC001-011-041-087-222315-
/O.CON.KBIS.SV.W.0114.000000T0000Z-210722T2315Z/
Bowman ND-Hettinger ND-Slope ND-Adams ND-
434 PM MDT Thu Jul 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MDT
FOR BOWMAN...WESTERN HETTINGER...SLOPE AND WESTERN ADAMS COUNTIES...

At 434 PM MDT, severe thunderstorms were located along a line
extending from near New England to 9 miles northeast of Ludlow,
moving southeast at 20 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Bowman, Hettinger, Amidon, New England, Scranton, Rhame, Reeder,
Regent, Mud Buttes, Griffin, Bucyrus, Havelock, Gascoyne, Bowman
Haley Dam and Buffalo Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4595 10382 4663 10348 4663 10241 4595 10249
TIME...MOT...LOC 2234Z 306DEG 19KT 4658 10293 4592 10323 

HAIL...0.75IN
WIND...60MPH
 
$$

ANGLIN

928 
WWUS53 KBIS 222247
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
447 PM MDT Thu Jul 22 2021

NDC001-011-041-087-222315-
/O.CON.KBIS.SV.W.0114.000000T0000Z-210722T2315Z/
Bowman ND-Hettinger ND-Slope ND-Adams ND-
447 PM MDT Thu Jul 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MDT
FOR EASTERN BOWMAN...WESTERN HETTINGER...EASTERN SLOPE AND WESTERN
ADAMS COUNTIES...

At 446 PM MDT, severe thunderstorms were located along a line
extending from New England to 9 miles northwest of Ralph, moving
southeast at 20 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Bowman, Hettinger, Amidon, New England, Scranton, Reeder, Regent,
Bucyrus, Havelock, Gascoyne, Bowman Haley Dam and Buffalo Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4595 10325 4606 10336 4619 10343 4663 10341
      4663 10241 4595 10249
TIME...MOT...LOC 2246Z 306DEG 19KT 4655 10288 4589 10318 

HAIL...0.75IN
WIND...60MPH
 
$$

ANGLIN

990 
WWUS53 KBIS 222303
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
503 PM MDT Thu Jul 22 2021

NDC001-011-041-087-222315-
/O.CON.KBIS.SV.W.0114.000000T0000Z-210722T2315Z/
Bowman ND-Hettinger ND-Slope ND-Adams ND-
503 PM MDT Thu Jul 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MDT
FOR NORTHEASTERN BOWMAN...WESTERN HETTINGER...EASTERN SLOPE AND
WESTERN ADAMS COUNTIES...

At 502 PM MDT, severe thunderstorms were located along a line
extending from near New England to 5 miles north of Ralph, moving
southeast at 20 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...At 453 PM MDT the Hettinger Airport recorded 60 MPH wind 
         gusts.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Hettinger, Amidon, New England, Scranton, Reeder, Regent, Bucyrus,
Havelock, Gascoyne and Buffalo Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4595 10298 4608 10320 4624 10336 4663 10332
      4663 10241 4595 10249
TIME...MOT...LOC 2302Z 306DEG 19KT 4651 10280 4585 10310 

HAIL...0.75IN
WIND...60MPH
 
$$

ANGLIN

940 
WWUS53 KBIS 222312
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
512 PM MDT Thu Jul 22 2021

NDC001-011-041-087-222322-
/O.EXP.KBIS.SV.W.0114.000000T0000Z-210722T2315Z/
Bowman ND-Hettinger ND-Slope ND-Adams ND-
512 PM MDT Thu Jul 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BOWMAN...WESTERN
HETTINGER...EASTERN SLOPE AND WESTERN ADAMS COUNTIES WILL EXPIRE AT
515 PM MDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with these thunderstorms.

LAT...LON 4595 10298 4608 10320 4624 10336 4663 10332
      4663 10241 4595 10249
TIME...MOT...LOC 2312Z 306DEG 19KT 4648 10275 4582 10305 

$$

ANGLIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 2:15 PM MDT	Special Weather Statement	BIS	Billings, Golden Valley, McKenzie	30 min
Jul 22, 2:43 PM MDT	Special Weather Statement	BIS	McKenzie	32 min
Jul 22, 3:02 PM MDT	Special Weather Statement	BIS	Billings, Bowman, Golden Valley, Slope	28 min
Jul 22, 3:15 PM MDT	Special Weather Statement	BIS	Dunn	45 min
Jul 22, 3:23 PM MDT	Severe Thunderstorm Warning	BIS	McKenzie, Mountrail, Williams	42 min
Jul 22, 3:46 PM MDT	Special Weather Statement	BIS	Bowman, Slope, Stark	44 min
Jul 22, 3:58 PM MDT	Special Weather Statement	BIS	Dunn, Mountrail	32 min
Jul 22, 4:25 PM MDT	Special Weather Statement	BIS	Dunn, Mercer, Stark	50 min
Jul 22, 5:10 PM MDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger, Sioux	65 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.