Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 142, NWS Bismarck, ND

August 27, 2021McKenzie County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 27, 2021, 6:23 PM CDT for McKenzie County, North Dakota. It was in force for 52 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: Aug 27, 2021, 6:23 PM CDT (23:23 UTC)
Expired: Aug 27, 2021, 7:15 PM CDT
In force: 52 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County McKenzie County, ND

The radar

The Minot AFB radar (KMBX), 185 km from the middle of the area, began a volume at 23:26 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
Aug 27, 6:36 PM CDT	HAIL 1	1 N Watford City, ND	A LOT OF SMALL HAIL WITH THE LARGEST STONE 1 INCH. HAIL DAMAGED A PICKUP TRUCK. REPORT RELAYED VIA SOCIAL MEDIA.
Aug 27, 6:38 PM CDT	HAIL 0.7	8 Ne Watford City, ND	ALSO HAD 40 MPH STORM WIND AROUND THE TIME OF THE HAIL. HAIL STARTED AROUND 638 PM AND THEN LASTED LESS THAN 5 MINUTES. RAIN TOTAL FROM THE STORM WAS 0.75 INCHES.

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, 11.4 hours before the alert went out and 226 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: 234 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 475 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted.

470 
WUUS53 KBIS 272323
SVRBIS
NDC053-280015-
/O.NEW.KBIS.SV.W.0142.210827T2323Z-210828T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
623 PM CDT Fri Aug 27 2021

The National Weather Service in Bismarck has issued a

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

* Until 715 PM CDT.

* At 623 PM CDT, a severe thunderstorm was located near Arnegard, or
  5 miles northwest of Watford City, moving northeast at 35 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Watford City around 630 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4775 10343 4788 10355 4808 10300 4784 10274
TIME...MOT...LOC 2323Z 246DEG 28KT 4784 10340 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

TELKEN

3 follow-up statements

782 
WWUS53 KBIS 272335
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
635 PM CDT Fri Aug 27 2021

NDC053-280015-
/O.CON.KBIS.SV.W.0142.000000T0000Z-210828T0015Z/
McKenzie ND-
635 PM CDT Fri Aug 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR NORTHEASTERN MCKENZIE COUNTY...

At 635 PM CDT, a severe thunderstorm was located 5 miles north of
Watford City, moving northeast at 30 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

This severe thunderstorm will remain over mainly rural areas of
northeastern McKenzie County, including the following locations...
Keene.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4777 10327 4792 10344 4808 10300 4784 10274
TIME...MOT...LOC 2335Z 246DEG 28KT 4788 10327 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

TELKEN

300 
WWUS53 KBIS 272347
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
647 PM CDT Fri Aug 27 2021

NDC053-280015-
/O.CON.KBIS.SV.W.0142.000000T0000Z-210828T0015Z/
McKenzie ND-
647 PM CDT Fri Aug 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR NORTHEASTERN MCKENZIE COUNTY...

At 646 PM CDT, a severe thunderstorm was located 10 miles northeast
of Watford City, moving northeast 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.

Locations impacted include...
Keene.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4780 10314 4797 10331 4808 10300 4784 10274
TIME...MOT...LOC 2346Z 246DEG 28KT 4792 10314 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

TELKEN

321 
WWUS53 KBIS 272353
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
653 PM CDT Fri Aug 27 2021

NDC053-280015-
/O.CON.KBIS.SV.W.0142.000000T0000Z-210828T0015Z/
McKenzie ND-
653 PM CDT Fri Aug 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR NORTHEASTERN MCKENZIE COUNTY...

At 652 PM CDT, a severe thunderstorm was located 13 miles northeast
of Watford City, moving northeast at 30 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Keene.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4780 10309 4788 10317 4800 10322 4808 10300
      4784 10274
TIME...MOT...LOC 2352Z 246DEG 28KT 4794 10307 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

TELKEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 5:58 PM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	47 min
Aug 27, 6:43 PM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	18 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.