Alert archive / North Dakota / Special Weather Statements in 2021

Special Weather Statement, NWS Bismarck, ND

July 21, 2021McLean County, North Dakota

NWS Bismarck, ND issued this special weather statement at Jul 21, 2021, 4:13 AM CDT for McLean 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 21, 2021, 4:13 AM CDT (09:13 UTC)
Expired
Jul 21, 2021, 4:45 AM CDT
In force
32 min
Issued by
NWS Bismarck, ND

County McLean County, ND

The radar

The Minot AFB radar (KMBX), 99 km from the middle of the area, began a volume at 09:14 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, 9.2 hours before the alert went out and 122 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-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 2021-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 2021-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
5 J/kg
Mixed-layer CIN
-255 J/kg
Mixed-layer LCL
2572 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
105 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

352 
WWUS83 KBIS 210913
SPSBIS

Special Weather Statement
National Weather Service Bismarck ND
413 AM CDT Wed Jul 21 2021
 
NDZ021-210945-
McLean ND-
413 AM CDT Wed Jul 21 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL MCLEAN COUNTY UNTIL
445 AM CDT...

At 413 AM CDT, a strong thunderstorm was located 9 miles southeast of
Roseglen, or 12 miles west of Garrison, moving east at 15 mph.

Penny size hail and wind gusts to 40 mph will be possible with this
storm.

Locations impacted include...
Garrison and Emmet. 

LAT...LON 4761 10173 4768 10180 4781 10152 4762 10138
TIME...MOT...LOC 0913Z 249DEG 14KT 4766 10168 

$$

GALE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 9:48 PM CDTSpecial Weather StatementBISMcKenzie27 min
Jul 20, 10:15 PM CDTSpecial Weather StatementBISMountrail45 min
Jul 21, 3:44 AM CDTSpecial Weather StatementBISMcLean31 min
Jul 21, 4:43 AM CDTSpecial Weather StatementBISMcLean32 min

Nearby

Special Weather Statements in North Dakota, 2021Every 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.