Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 85, NWS Bismarck, ND

July 8, 2021Williams County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 8, 2021, 5:36 PM CDT for Williams County, North Dakota. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 8, 2021, 5:36 PM CDT (22:36 UTC)
Expired: Jul 8, 2021, 6:30 PM CDT
In force: 54 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Williams County, ND

The radar

The Minot AFB radar (KMBX), 206 km from the middle of the area, began a volume at 22:38 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.

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, 10.6 hours before the alert went out and 220 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.

387 
WUUS53 KBIS 082236
SVRBIS
NDC105-082330-
/O.NEW.KBIS.SV.W.0085.210708T2236Z-210708T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
536 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...

* Until 630 PM CDT.

* At 536 PM CDT, severe thunderstorms were located along a line
  extending from 9 miles east of Grenora to 4 miles east of
  Bonetrail, moving southeast at 25 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.

* Severe thunderstorms will be near...
  Alamo around 605 PM CDT.
  Epping around 620 PM CDT.

Other locations impacted by these severe thunderstorms include Zahl,
Appam, Wheelock, Hanks, Spring Brook, Corinth and Blacktail Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4864 10386 4863 10320 4813 10322 4838 10386
      4853 10391
TIME...MOT...LOC 2236Z 297DEG 22KT 4864 10372 4841 10375 

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

HOLLAN

2 follow-up statements

487 
WWUS53 KBIS 082257
SVSBIS

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

NDC105-082330-
/O.CON.KBIS.SV.W.0085.000000T0000Z-210708T2330Z/
Williams ND-
557 PM CDT Thu Jul 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR NORTHWESTERN WILLIAMS COUNTY...

At 556 PM CDT, severe thunderstorms were located along a line
extending from near Alamo to 9 miles northwest of Epping, moving
southeast at 30 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.

These severe storms will be near...
  Epping around 615 PM CDT.

Other locations impacted by these severe thunderstorms include Zahl,
Appam, Wheelock, Hanks, Spring Brook, Corinth, and Blacktail Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4864 10386 4863 10320 4813 10322 4838 10386
      4853 10391
TIME...MOT...LOC 2256Z 296DEG 24KT 4857 10352 4834 10355 

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

HOLLAN

006 
WWUS53 KBIS 082309
SVSBIS

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

NDC105-082330-
/O.CON.KBIS.SV.W.0085.000000T0000Z-210708T2330Z/
Williams ND-
609 PM CDT Thu Jul 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR NORTH CENTRAL WILLIAMS COUNTY...

At 608 PM CDT, severe thunderstorms were located along a line
extending from near Alamo to 5 miles northwest of Epping, moving
southeast at 25 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.

These severe storms will be near...
  Epping around 620 PM CDT.

Other locations impacted by these severe thunderstorms include Zahl,
Spring Brook, Corinth, Appam, and Wheelock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4863 10320 4813 10322 4832 10370 4846 10370
      4864 10371
TIME...MOT...LOC 2308Z 297DEG 22KT 4854 10343 4831 10346 

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, 5:38 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.