Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 88, NWS Bismarck, ND

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

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 8, 2021, 5:53 PM CDT for McKenzie County, Williams County, North Dakota. It was in force for 37 min. 2 reports 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, 5:53 PM CDT (22:53 UTC)
Expired: Jul 8, 2021, 6:30 PM CDT
In force: 37 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties McKenzie County, ND, Williams County, ND

The radar

The Minot AFB radar (KMBX), 207 km from the middle of the area, began a volume at 22:54 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, 5:59 PM CDT	TSTM WND GST 59	9 Nw Williston, ND	ASOS STATION KXWA WILLISTON AIRPORT.
Jul 8, 5:59 PM CDT	TSTM WND GST 61	5 Wsw Williston, ND	NDAWN STATION 5SW WILLISTON. GUST AT 10 METERS.

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, 10.9 hours before the alert went out and 219 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.

901 
WUUS53 KBIS 082253
SVRBIS
NDC053-105-082330-
/O.NEW.KBIS.SV.W.0088.210708T2253Z-210708T2330Z/

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

The National Weather Service in Bismarck has issued a

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

* Until 630 PM CDT.

* At 552 PM CDT, a severe thunderstorm was located 7 miles northwest
  of Williston, moving east 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.

* This severe thunderstorm will be near...
  Williston around 600 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4839 10387 4821 10321 4786 10325 4800 10404
TIME...MOT...LOC 2252Z 282DEG 28KT 4821 10375 

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

HOLLAN

1 follow-up statement

337 
WWUS53 KBIS 082307
SVSBIS

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

NDC053-105-082330-
/O.CON.KBIS.SV.W.0088.000000T0000Z-210708T2330Z/
McKenzie ND-Williams ND-
607 PM CDT Thu Jul 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR NORTHWESTERN MCKENZIE AND SOUTHWESTERN WILLIAMS COUNTIES...

At 606 PM CDT, a severe thunderstorm was located near Williston,
moving southeast at 40 mph.

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

SOURCE...Radar indicated. At 559 PM CDT, a 61 mph wind gust was 
         reported 5 miles southwest of Williston.

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
northwestern McKenzie and southwestern Williams Counties, including
the following locations... Lewis And Clark State Park, Trenton and
Spring Brook.

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 4821 10321 4786 10325 4797 10389 4837 10378
TIME...MOT...LOC 2306Z 294DEG 34KT 4815 10355 

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, 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.