Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 140, NWS Bismarck, ND

August 26, 2021Adams County, Grant County, Sioux County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 26, 2021, 2:52 AM MDT for Adams County, Grant County, Sioux County, North Dakota. It was in force for 23 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: Aug 26, 2021, 2:52 AM MDT (08:52 UTC)
Expired: Aug 26, 2021, 3:15 AM MDT
In force: 23 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Adams County, ND, Grant County, ND, Sioux County, ND

The radar

The Bismarck radar (KBIS), 117 km from the middle of the area, began a volume at 08:53 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 nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 8.9 hours before the alert went out and 121 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: 2183 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 281 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

755 
WUUS53 KBIS 260852
SVRBIS
NDC001-037-085-260915-
/O.NEW.KBIS.SV.W.0140.210826T0852Z-210826T0915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
252 AM MDT Thu Aug 26 2021

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Southwestern Sioux County in south central North Dakota...
  Southwestern Grant County in south central North Dakota...
  Southeastern Adams County in southwestern North Dakota...

* Until 315 AM MDT.

* At 251 AM MDT, a severe thunderstorm was located 6 miles northeast
  of Thunder Hawk, or 13 miles northeast of Lemmon, moving east at 35
  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 remain over mainly rural areas of
  southwestern Sioux, southwestern Grant and southeastern Adams
  Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4595 10234 4621 10234 4621 10200 4627 10200
      4636 10140 4594 10139
TIME...MOT...LOC 0851Z 260DEG 30KT 4603 10191 

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

$$

GALE

2 follow-up statements

994 
WWUS53 KBIS 260902
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
302 AM MDT Thu Aug 26 2021

NDC001-260911-
/O.CAN.KBIS.SV.W.0140.000000T0000Z-210826T0915Z/
Adams ND-
302 AM MDT Thu Aug 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ADAMS COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4595 10200 4627 10200 4636 10140 4594 10139
TIME...MOT...LOC 0901Z 260DEG 30KT 4605 10178 

$$

NDC037-085-260915-
/O.CON.KBIS.SV.W.0140.000000T0000Z-210826T0915Z/
Sioux ND-Grant ND-
302 AM MDT Thu Aug 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 AM MDT
FOR SOUTHWESTERN SIOUX AND SOUTHWESTERN GRANT COUNTIES...

At 301 AM MDT, a severe thunderstorm was located 7 miles north of
Keldron, or 19 miles east of Lemmon, moving east at 35 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 remain over mainly rural areas of
southwestern Sioux and southwestern Grant Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4595 10200 4627 10200 4636 10140 4594 10139
TIME...MOT...LOC 0901Z 260DEG 30KT 4605 10178 

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

$$

GALE

989 
WWUS53 KBIS 260916
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
316 AM MDT Thu Aug 26 2021

NDC037-085-260926-
/O.EXP.KBIS.SV.W.0140.000000T0000Z-210826T0915Z/
Sioux ND-Grant ND-
316 AM MDT Thu Aug 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SIOUX AND
SOUTHWESTERN GRANT COUNTIES HAS EXPIRED...
                
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 has been allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 4595 10200 4627 10200 4636 10140 4594 10139
TIME...MOT...LOC 0916Z 260DEG 30KT 4607 10164 

$$

GALE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 12:58 AM MDT	Special Weather Statement	BIS	Bowman	32 min
Aug 26, 1:18 AM MDT	Severe Thunderstorm Warning	BIS	Adams, Bowman	27 min
Aug 26, 1:43 AM MDT	Severe Thunderstorm Warning	BIS	Adams, Bowman	32 min
Aug 26, 2:17 AM MDT	Special Weather Statement	BIS	Adams, Hettinger	43 min
Aug 26, 2:28 AM MDT	Severe Thunderstorm Warning	BIS	Adams	32 min
Aug 26, 12:40 PM MDT	Special Weather Statement	BIS	Dickey	20 min
Aug 26, 12:58 PM MDT	Special Weather Statement	BIS	LaMoure	32 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.