Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 91, NWS Bismarck, ND

July 8, 2021McKenzie County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 8, 2021, 6:38 PM CDT for McKenzie County, North Dakota. It was in force for 37 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, 6:38 PM CDT (23:38 UTC)
Expired: Jul 8, 2021, 7:15 PM CDT
In force: 37 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County McKenzie County, ND

The radar

The Minot AFB radar (KMBX), 222 km from the middle of the area, began a volume at 23:40 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, 7:03 PM CDT	TSTM WND GST 61	2 Ene Watford City, ND	NDAWN STATION 2E WATFORD CITY.

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, 4:38 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 11.6 hours before the alert went out and 224 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: 102 J/kg
Mixed-layer CIN: -411 J/kg
Mixed-layer LCL: 1738 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 154 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

348 
WUUS53 KBIS 082338
SVRBIS
NDC053-090015-
/O.NEW.KBIS.SV.W.0091.210708T2338Z-210709T0015Z/

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

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Southern McKenzie County in northwestern North Dakota...

* Until 715 PM CDT/615 PM MDT/.

* At 638 PM CDT/538 PM MDT/, a severe thunderstorm was located near 
  Alexander, or 16 miles west of Watford City, moving east at 40 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 be near...
  Arnegard around 650 PM CDT.

Other locations in the path of this severe thunderstorm include
Watford City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4780 10404 4793 10379 4784 10309 4743 10310
      4764 10404
TIME...MOT...LOC 2338Z 279DEG 33KT 4782 10363 

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

HOLLAN

1 follow-up statement

418 
WWUS53 KBIS 082355
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
655 PM CDT Thu Jul 8 2021

NDC053-090015-
/O.CON.KBIS.SV.W.0091.000000T0000Z-210709T0015Z/
McKenzie ND-
655 PM CDT Thu Jul 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM
CDT/615 PM MDT/ FOR CENTRAL MCKENZIE COUNTY...

At 655 PM CDT/555 PM MDT/, a severe thunderstorm was located 6 miles
southwest of Watford City, moving east at 40 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 storm will be near...
  Theodore Roosevelt National Park North Unit around 705 PM CDT.

Other locations impacted by this severe thunderstorm include Rawson
and Sather Dam.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4779 10394 4790 10353 4784 10309 4743 10310
      4764 10404
TIME...MOT...LOC 2355Z 285DEG 35KT 4772 10336 

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

HOLLAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 6:43 AM CDT	Special Weather Statement	BIS	Divide	47 min
Jul 8, 7:26 AM CDT	Special Weather Statement	BIS	Divide	49 min
Jul 8, 8:16 AM CDT	Special Weather Statement	BIS	Burke	29 min
Jul 8, 4:34 PM CDT	Severe Thunderstorm Warning	BIS	Divide	41 min
Jul 8, 5:00 PM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	60 min
Jul 8, 5:36 PM CDT	Severe Thunderstorm Warning	BIS	Williams	54 min
Jul 8, 5:38 PM CDT	Severe Thunderstorm Warning	BIS	Slope	52 min
Jul 8, 5:51 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman	54 min
Jul 8, 5:53 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	37 min
Jul 8, 6:28 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	47 min
Jul 8, 6:28 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Slope	62 min
Jul 8, 6:34 PM CDT	Special Weather Statement	BIS	Stark	11 min
Jul 8, 6:51 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Stark	54 min
Jul 8, 6:52 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, McKenzie	68 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.