Alert archive / North Dakota / Special Weather Statements in 2021

Special Weather Statement, NWS Bismarck, ND

August 7, 2021Stark County, North Dakota

NWS Bismarck, ND issued this special weather statement at Aug 7, 2021, 4:23 AM MDT for Stark County, North Dakota. It was in force for 52 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 7, 2021, 4:23 AM MDT (10:23 UTC)
Expired: Aug 7, 2021, 5:15 AM MDT
In force: 52 min
Issued by: NWS Bismarck, ND
Hail: 0.75 in
Wind: 40

County Stark County, ND

The radar

The Bismarck radar (KBIS), 131 km from the middle of the area, began a volume at 10:25 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, 10.4 hours before the alert went out and 135 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: 14 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 1900 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

054 
WWUS83 KBIS 071023
SPSBIS

Special Weather Statement
National Weather Service Bismarck ND
423 AM MDT Sat Aug 7 2021
 
NDZ018-033-071115-
Stark ND-Dunn ND-
423 AM MDT Sat Aug 7 2021

...Strong thunderstorms will impact portions of southeastern Dunn and
eastern Stark Counties through 515 AM MDT...

At 423 AM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 10 miles east of Manning to 6 miles south of
Gladstone. Movement was northeast at 10 mph.

HAZARD...Winds in excess of 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects. Minor damage to outdoor objects is 
         possible.

Locations impacted include...
  Richardton, Halliday and Taylor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4746 10227 4679 10219 4667 10262 4723 10268
TIME...MOT...LOC 1023Z 219DEG 9KT 4719 10256 4678 10252 

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

$$

MJONES

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 1:31 AM MDT	Special Weather Statement	BIS	Billings	44 min
Aug 7, 5:46 AM MDT	Special Weather Statement	BIS	Hettinger	44 min
Aug 7, 7:55 AM MDT	Special Weather Statement	BIS	Adams	35 min
Aug 7, 8:25 AM MDT	Special Weather Statement	BIS	Grant	35 min
Aug 7, 1:53 PM MDT	Areal Flood Advisory	BIS	Grant, Morton, Sioux	3 hr
Aug 7, 3:11 PM MDT	Flash Flood Warning	BIS	Sioux	3 hr
Aug 7, 5:42 PM MDT	Special Weather Statement	BIS	Dickey	33 min

Nearby

Special Weather Statements in North Dakota, 2021 Every special weather statement 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.