Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 116, NWS Bismarck, ND

July 23, 2021Grant County, Sioux County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 23, 2021, 6:31 PM MDT for Grant County, Sioux County, North Dakota. It was in force for 32 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: Jul 23, 2021, 6:31 PM MDT (00:31 UTC)
Expired: Jul 23, 2021, 7:03 PM MDT
In force: 32 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Grant County, ND, Sioux County, ND

The radar

The Bismarck radar (KBIS), 115 km from the middle of the area, began a volume at 00:33 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 23, 6:02 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.5 hours before the alert went out and 118 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: 568 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 2719 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

990 
WUUS53 KBIS 240031
SVRBIS
NDC037-085-240115-
/O.NEW.KBIS.SV.W.0116.210724T0031Z-210724T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
731 PM CDT Fri Jul 23 2021

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Southwestern Sioux County in south central North Dakota...
  South central Grant County in south central North Dakota...

* Until 815 PM CDT/715 PM MDT/.

* At 730 PM CDT/630 PM MDT/, a severe thunderstorm was located 6
  miles north of Keldron, or 17 miles east of Lemmon, moving
  southeast at 25 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 south central Grant Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4602 10196 4611 10190 4595 10118 4594 10183
TIME...MOT...LOC 0030Z 294DEG 22KT 4603 10182 

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

Telken

3 follow-up statements

564 
WWUS53 KBIS 240041
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
741 PM CDT Fri Jul 23 2021

NDC037-085-240115-
/O.CON.KBIS.SV.W.0116.000000T0000Z-210724T0115Z/
Sioux ND-Grant ND-
741 PM CDT Fri Jul 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM
CDT/715 PM MDT/ FOR SOUTHWESTERN SIOUX AND SOUTH CENTRAL GRANT
COUNTIES...

At 741 PM CDT/641 PM MDT/, a severe thunderstorm was located near
Morristown, or 20 miles east of Lemmon, moving southeast at 25 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
southwestern Sioux and south central Grant Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4599 10184 4609 10183 4595 10118 4596 10177
TIME...MOT...LOC 0041Z 294DEG 22KT 4600 10173 

HAIL...1.50IN
WIND...60MPH
 
$$

Telken

507 
WWUS53 KBIS 240052
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
752 PM CDT Fri Jul 23 2021

NDC037-085-240115-
/O.CON.KBIS.SV.W.0116.000000T0000Z-210724T0115Z/
Sioux ND-Grant ND-
752 PM CDT Fri Jul 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM
CDT/715 PM MDT/ FOR SOUTHWESTERN SIOUX AND SOUTH CENTRAL GRANT
COUNTIES...

At 752 PM CDT/652 PM MDT/, a severe thunderstorm was located near
Morristown, or 24 miles east of Lemmon, moving southeast at 25 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 south central Grant Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4598 10178 4607 10174 4595 10118 4596 10177
TIME...MOT...LOC 0052Z 294DEG 22KT 4597 10164 

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

Telken

920 
WWUS53 KBIS 240103
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
803 PM CDT Fri Jul 23 2021

NDC037-085-240112-
/O.CAN.KBIS.SV.W.0116.000000T0000Z-210724T0115Z/
Sioux ND-Grant ND-
803 PM CDT Fri Jul 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SIOUX AND SOUTH
CENTRAL GRANT COUNTIES IS CANCELLED...
                
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 cancelled.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT/100 AM
MDT/ for south central North Dakota.

Remember, a Severe Thunderstorm Warning still remains in effect for
southeastern Grant County and north central Sioux County.

LAT...LON 4598 10178 4607 10174 4595 10118 4596 10177
TIME...MOT...LOC 0057Z 294DEG 22KT 4594 10156 

$$

Telken

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 6:26 PM MDT	Special Weather Statement	BIS	Grant	49 min
Jul 23, 6:40 PM MDT	Severe Thunderstorm Warning	BIS	Grant, Morton, Sioux	35 min
Jul 23, 7:20 PM MDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Sioux	55 min
Jul 23, 7:33 PM MDT	Special Weather Statement	BIS	Emmons	42 min
Jul 23, 8:10 PM MDT	Special Weather Statement	BIS	Emmons, Logan, McIntosh	65 min
Jul 23, 8:30 PM MDT	Severe Thunderstorm Warning	BIS	Emmons, Logan, McIntosh	60 min
Jul 23, 9:09 PM MDT	Severe Thunderstorm Warning	BIS	Dickey	66 min
Jul 23, 10:22 PM MDT	Special Weather Statement	BIS	Dickey	38 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.