Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 84, NWS Bismarck, ND

July 8, 2021Divide County, Williams County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 8, 2021, 5:00 PM CDT for Divide County, Williams County, North Dakota. It was in force for 60 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, 5:00 PM CDT (22:00 UTC)
Expired: Jul 8, 2021, 6:00 PM CDT
In force: 60 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Divide County, ND, Williams County, ND

The radar

The Glasgow radar (KGGW), 207 km from the middle of the area, began a volume at 22:02 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, 5:25 PM CDT	TSTM WND GST 58	4 S Hanks, ND	NDAWN STATION 4S HANKS.

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, 10.0 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: 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.

034 
WUUS53 KBIS 082200
SVRBIS
NDC023-105-082300-
/O.NEW.KBIS.SV.W.0084.210708T2200Z-210708T2300Z/

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

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Northwestern Williams County in northwestern North Dakota...
  Southwestern Divide County in northwestern North Dakota...

* Until 600 PM CDT.

* At 459 PM CDT, a severe thunderstorm was located near Grenora, or 
  27 miles east of Plentywood, moving east at 5 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Grenora.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

&&

LAT...LON 4879 10405 4888 10370 4847 10371 4855 10405
TIME...MOT...LOC 2159Z 278DEG 6KT 4864 10399 

HAIL...1.25IN
WIND...60MPH
 
$$

HOLLAN

2 follow-up statements

079 
WWUS53 KBIS 082215
SVSBIS

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

NDC023-105-082300-
/O.CON.KBIS.SV.W.0084.000000T0000Z-210708T2300Z/
Williams ND-Divide ND-
515 PM CDT Thu Jul 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR NORTHWESTERN WILLIAMS AND SOUTHWESTERN DIVIDE COUNTIES...

At 515 PM CDT, a severe thunderstorm was located over Grenora, or 30
miles east of Plentywood, moving east at 10 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Grenora and Hanks. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4879 10405 4888 10370 4847 10371 4855 10405
TIME...MOT...LOC 2215Z 281DEG 10KT 4863 10392 

HAIL...1.25IN
WIND...60MPH
 
$$

HOLLAN

105 
WWUS53 KBIS 082229
SVSBIS

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

NDC023-105-082300-
/O.CON.KBIS.SV.W.0084.000000T0000Z-210708T2300Z/
Williams ND-Divide ND-
529 PM CDT Thu Jul 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR NORTHWESTERN WILLIAMS AND SOUTHWESTERN DIVIDE COUNTIES...

At 528 PM CDT, a severe thunderstorm was located 5 miles southeast of
Grenora, or 30 miles north of Williston, moving southeast at 20 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated. At 522 PM CDT, a 58 mph wind gust was 
         reported 4 miles south of Hanks.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Grenora and Hanks. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4881 10397 4882 10370 4847 10371 4854 10400
      4880 10401
TIME...MOT...LOC 2228Z 302DEG 19KT 4858 10383 

HAIL...1.25IN
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, 5:36 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, 6:38 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie	37 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.