Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 115, NWS Bismarck, ND

July 22, 20214 counties in North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 22, 2021, 5:10 PM MDT for 4 counties in North Dakota. It was in force for 65 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: Jul 22, 2021, 5:10 PM MDT (23:10 UTC)
Expired: Jul 22, 2021, 6:15 PM MDT
In force: 65 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Bismarck radar (KBIS), 116 km from the middle of the area, began a volume at 23:10 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
Jul 22, 5:37 PM MDT	TSTM WND GST 61	2 N Bentley, ND	MESONET STATION TT584 12 E MOTT.

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, 11.2 hours before the alert went out and 120 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: 104 J/kg
Mixed-layer CIN: -415 J/kg
Mixed-layer LCL: 1354 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

183 
WUUS53 KBIS 222310
SVRBIS
NDC001-037-041-085-230015-
/O.NEW.KBIS.SV.W.0115.210722T2310Z-210723T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
510 PM MDT Thu Jul 22 2021

The National Weather Service in Bismarck has issued a

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

* Until 615 PM MDT.

* At 509 PM MDT, severe thunderstorms were located along a line
  extending from 14 miles northeast of Reeder to near Hettinger,
  moving east at 30 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Severe thunderstorms will be near...
  Haynes around 525 PM MDT.

Other locations in the path of these severe thunderstorms include
Mott and New Leipzig.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4595 10251 4663 10242 4663 10210 4665 10210
      4665 10172 4594 10163
TIME...MOT...LOC 2309Z 252DEG 24KT 4624 10272 4603 10265 

HAIL...0.75IN
WIND...60MPH
 
$$

Telken

1 follow-up statement

604 
WWUS53 KBIS 230011
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
611 PM MDT Thu Jul 22 2021

NDC001-037-041-085-230021-
/O.EXP.KBIS.SV.W.0115.000000T0000Z-210723T0015Z/
Sioux ND-Hettinger ND-Grant ND-Adams ND-
611 PM MDT Thu Jul 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SIOUX...EASTERN
HETTINGER...WESTERN GRANT AND SOUTHEASTERN ADAMS COUNTIES WILL EXPIRE
AT 615 PM MDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

LAT...LON 4595 10251 4663 10242 4663 10210 4665 10210
      4665 10172 4594 10163
TIME...MOT...LOC 0011Z 252DEG 24KT 4637 10216 4616 10209 

$$

Telken

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 2:15 PM MDT	Special Weather Statement	BIS	Billings, Golden Valley, McKenzie	30 min
Jul 22, 2:43 PM MDT	Special Weather Statement	BIS	McKenzie	32 min
Jul 22, 3:02 PM MDT	Special Weather Statement	BIS	Billings, Bowman, Golden Valley, Slope	28 min
Jul 22, 3:15 PM MDT	Special Weather Statement	BIS	Dunn	45 min
Jul 22, 3:23 PM MDT	Severe Thunderstorm Warning	BIS	McKenzie, Mountrail, Williams	42 min
Jul 22, 3:46 PM MDT	Special Weather Statement	BIS	Bowman, Slope, Stark	44 min
Jul 22, 3:58 PM MDT	Special Weather Statement	BIS	Dunn, Mountrail	32 min
Jul 22, 4:12 PM MDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Hettinger, Slope	63 min
Jul 22, 4:25 PM MDT	Special Weather Statement	BIS	Dunn, Mercer, Stark	50 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.