Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 144, NWS Bismarck, ND

August 27, 2021McKenzie County, McLean County, Mountrail County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 27, 2021, 7:06 PM CDT for McKenzie County, McLean County, Mountrail County, North Dakota. It was in force for 54 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: Aug 27, 2021, 7:06 PM CDT (00:06 UTC)
Expired: Aug 27, 2021, 8:00 PM CDT
In force: 54 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties McKenzie County, ND, McLean County, ND, Mountrail County, ND

The radar

The Minot AFB radar (KMBX), 130 km from the middle of the area, began a volume at 00:08 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, 7:38 PM CDT	TSTM WND GST 60	7 S 4 Bears Lodge, ND	RADAR ESTIMATED TIME.

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 00:00Z, 0.1 hours before the alert went out and 175 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: 460 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 1088 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

800 
WUUS53 KBIS 280006
SVRBIS
NDC053-055-061-280100-
/O.NEW.KBIS.SV.W.0144.210828T0006Z-210828T0100Z/

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

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Northwestern McLean County in south central North Dakota...
  East central McKenzie County in northwestern North Dakota...
  Southeastern Mountrail County in northwestern North Dakota...

* Until 800 PM CDT.

* At 706 PM CDT, a severe thunderstorm was located 13 miles northwest
  of Mandaree, or 20 miles east of Watford City, moving east at 40
  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...
  4 Bears Lodge around 725 PM CDT.

Other locations in the path of this severe thunderstorm include New
Town, Van Hook Park and Parshall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4804 10201 4775 10201 4777 10226 4778 10226
      4780 10232 4780 10235 4777 10237 4779 10258
      4782 10264 4779 10264 4782 10293 4794 10295
TIME...MOT...LOC 0006Z 267DEG 33KT 4788 10286 

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

$$

TELKEN

3 follow-up statements

162 
WWUS53 KBIS 280017
SVSBIS

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

NDC053-055-061-280100-
/O.CON.KBIS.SV.W.0144.000000T0000Z-210828T0100Z/
McLean ND-McKenzie ND-Mountrail ND-
717 PM CDT Fri Aug 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR NORTHWESTERN MCLEAN...EAST CENTRAL MCKENZIE AND SOUTHEASTERN
MOUNTRAIL COUNTIES...

At 716 PM CDT, a severe thunderstorm was located 9 miles southwest of
4 Bears Lodge, or 27 miles east of Watford City, moving east at 40
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 storm will be near...
  4 Bears Lodge around 725 PM CDT.

Other locations in the path of this severe thunderstorm include New
Town, Van Hook Park and Parshall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4804 10201 4775 10201 4777 10226 4778 10226
      4780 10232 4780 10235 4777 10237 4779 10258
      4782 10264 4779 10264 4781 10283 4795 10285
TIME...MOT...LOC 0016Z 267DEG 33KT 4789 10271 

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

$$

TELKEN

708 
WWUS53 KBIS 280032
SVSBIS

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

NDC053-055-061-280100-
/O.CON.KBIS.SV.W.0144.000000T0000Z-210828T0100Z/
McLean ND-McKenzie ND-Mountrail ND-
732 PM CDT Fri Aug 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR NORTHWESTERN MCLEAN...EAST CENTRAL MCKENZIE AND SOUTHEASTERN
MOUNTRAIL COUNTIES...

At 732 PM CDT, a severe thunderstorm was located 5 miles south of New
Town, or 29 miles south of Stanley, 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.

Locations impacted include...
  Van Hook Park and Parshall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4804 10201 4775 10201 4777 10226 4778 10226
      4780 10232 4780 10235 4777 10237 4779 10258
      4782 10264 4779 10264 4780 10271 4795 10270
      4797 10264
TIME...MOT...LOC 0032Z 267DEG 33KT 4790 10248 

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

$$

TELKEN

195 
WWUS53 KBIS 280057
SVSBIS

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

NDC053-055-061-280106-
/O.EXP.KBIS.SV.W.0144.000000T0000Z-210828T0100Z/
McLean ND-McKenzie ND-Mountrail ND-
757 PM CDT Fri Aug 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MCLEAN...EAST
CENTRAL MCKENZIE AND SOUTHEASTERN MOUNTRAIL COUNTIES WILL EXPIRE AT
800 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small hail
is still possible with this thunderstorm.

LAT...LON 4804 10201 4775 10201 4777 10226 4778 10226
      4780 10232 4780 10235 4777 10237 4779 10258
      4782 10264 4779 10264 4780 10271 4795 10270
      4797 10264
TIME...MOT...LOC 0056Z 267DEG 33KT 4791 10215 

$$

TELKEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 1:35 AM CDT	Dense Fog Advisory	BIS	Bottineau, Burke, Burleigh, Foster, Kidder, McHenry and 9 more	10 hr

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.