Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 141, NWS Bismarck, ND

August 27, 2021Divide County, Williams County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 27, 2021, 5:58 PM CDT for Divide County, Williams County, North Dakota. It was in force for 47 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, 5:58 PM CDT (22:58 UTC)
Expired: Aug 27, 2021, 6:45 PM CDT
In force: 47 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Divide County, ND, Williams County, ND

The radar

The Minot AFB radar (KMBX), 196 km from the middle of the area, began a volume at 22:59 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, 6:40 PM CDT	HAIL 1.5	3 N Alamo, ND	REPORT RELAYED VIA EMERGENCY MANAGEMENT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 11.0 hours before the alert went out and 230 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 950 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

601 
WUUS53 KBIS 272258
SVRBIS
NDC023-105-272345-
/O.NEW.KBIS.SV.W.0141.210827T2258Z-210827T2345Z/

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

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Northeastern Williams County in northwestern North Dakota...
  South central Divide County in northwestern North Dakota...

* Until 645 PM CDT.

* At 558 PM CDT, a severe thunderstorm was located 9 miles east of
  Bonetrail, or 19 miles north of Williston, moving northeast at 20
  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.

* Locations impacted include...
  Alamo.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4833 10361 4841 10379 4877 10353 4845 10303
TIME...MOT...LOC 2258Z 214DEG 17KT 4844 10364 

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

$$

TELKEN

3 follow-up statements

052 
WWUS53 KBIS 272307
SVSBIS

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

NDC023-105-272345-
/O.CON.KBIS.SV.W.0141.000000T0000Z-210827T2345Z/
Williams ND-Divide ND-
607 PM CDT Fri Aug 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR NORTHEASTERN WILLIAMS AND SOUTH CENTRAL DIVIDE COUNTIES...

At 606 PM CDT, a severe thunderstorm was located 9 miles southwest of
Alamo, or 22 miles north of Williston, moving northeast at 20 mph.

HAZARD...Two inch 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...
Alamo, Corinth, Blacktail Lake and Appam. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4836 10362 4844 10377 4877 10353 4845 10303
      4838 10337
TIME...MOT...LOC 2306Z 214DEG 17KT 4847 10360 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

TELKEN

963 
WWUS53 KBIS 272321
SVSBIS

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

NDC023-105-272345-
/O.CON.KBIS.SV.W.0141.000000T0000Z-210827T2345Z/
Williams ND-Divide ND-
621 PM CDT Fri Aug 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR NORTHEASTERN WILLIAMS AND SOUTH CENTRAL DIVIDE COUNTIES...

At 620 PM CDT, a severe thunderstorm was located 5 miles southwest of
Alamo, or 26 miles north of Williston, moving northeast at 20 mph.

HAZARD...Two inch 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...
Alamo, Corinth and Appam. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4839 10358 4850 10369 4877 10353 4845 10303
      4838 10337
TIME...MOT...LOC 2320Z 214DEG 17KT 4853 10354 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

JP MARTIN

387 
WWUS53 KBIS 272334
SVSBIS

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

NDC023-105-272345-
/O.CON.KBIS.SV.W.0141.000000T0000Z-210827T2345Z/
Williams ND-Divide ND-
634 PM CDT Fri Aug 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR NORTHEASTERN WILLIAMS AND SOUTH CENTRAL DIVIDE COUNTIES...

At 634 PM CDT, a severe thunderstorm was located over Alamo, or 24
miles south of Crosby, moving northeast at 20 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.

Locations impacted include...
Alamo, Corinth and Appam. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4844 10353 4851 10366 4877 10353 4845 10303
      4838 10337 4839 10347
TIME...MOT...LOC 2334Z 214DEG 17KT 4858 10348 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 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, 6:23 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie	52 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.