Alert archive / Minnesota / Special Weather Statements in 2021

Special Weather Statement, NWS Duluth, MN

August 10, 2021Koochiching County, Minnesota

NWS Duluth, MN issued this special weather statement at Aug 10, 2021, 3:21 AM CDT for Koochiching County, Minnesota. It was in force for 24 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 10, 2021, 3:21 AM CDT (08:21 UTC)
Expired: Aug 10, 2021, 3:45 AM CDT
In force: 24 min
Issued by: NWS Duluth, MN
Hail: 0.25 in
Wind: 30

County Koochiching County, MN

The radar

The Duluth radar (KDLH), 249 km from the middle of the area, began a volume at 08:23 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

International Fa, MN (KINL), launched 00:00Z, 8.4 hours before the alert went out and 71 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: 1281 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 1326 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 220 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 5.0

Open this sounding in Storm Lab

The text

As transmitted.

600 
WWUS83 KDLH 100821
SPSDLH

Special Weather Statement
National Weather Service Duluth MN
321 AM CDT Tue Aug 10 2021
 
MNZ010-100845-
Koochiching MN-
321 AM CDT Tue Aug 10 2021

...Strong thunderstorms will impact portions of northwestern
Koochiching County through 345 AM CDT...

At 319 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 12 miles east of Baudette, to near Waskish.
Movement was east at 30 mph.

HAZARD...Winds in excess of 30 mph and pea 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.

These storms will remain over mainly rural areas of northwestern
Koochiching County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4870 9428 4870 9426 4866 9426 4865 9423
      4863 9391 4819 9410 4815 9442 4863 9443
      4871 9440 4870 9435 4871 9430
TIME...MOT...LOC 0819Z 249DEG 26KT 4875 9432 4821 9456 

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH

$$

KSE

The office that day

Everything else NWS Duluth, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 9, 7:15 PM CDT	Marine Dense Fog Advisory	DLH		15 hr
Aug 10, 3:38 AM CDT	Dense Fog Advisory	DLH	Carlton, Cook, Lake, Saint Louis	6 hr
Aug 10, 3:45 AM CDT	Special Weather Statement	DLH	Koochiching	15 min
Aug 10, 3:56 AM CDT	Special Weather Statement	DLH	Cass	19 min
Aug 10, 4:14 AM CDT	Special Weather Statement	DLH	Cass	16 min
Aug 10, 4:29 AM CDT	Special Weather Statement	DLH	Aitkin	16 min
Aug 10, 4:52 AM CDT	Special Weather Statement	DLH	Aitkin	23 min
Aug 10, 4:54 AM CDT	Special Weather Statement	DLH	Koochiching	36 min
Aug 10, 5:22 AM CDT	Special Weather Statement	DLH	Carlton	23 min
Aug 10, 5:27 AM CDT	Special Weather Statement	DLH		33 min
Aug 10, 5:58 AM CDT	Special Weather Statement	DLH		32 min
Aug 10, 12:20 PM CDT	Special Marine Warning	DLH		55 min
Aug 10, 1:33 PM CDT	Special Marine Warning	DLH		57 min
Aug 10, 1:40 PM CDT	Special Weather Statement	DLH	Cook	35 min
Aug 10, 11:04 AM CDT	Special Weather Statement	DLH	Burnett	26 min
Aug 10, 11:18 AM CDT	Special Weather Statement	DLH	Washburn	27 min
Aug 10, 11:30 AM CDT	Special Weather Statement	DLH	Bayfield	30 min
Aug 10, 11:39 AM CDT	Special Weather Statement	DLH	Douglas	36 min
Aug 10, 11:46 AM CDT	Special Weather Statement	DLH	Bayfield	44 min
Aug 10, 11:52 AM CDT	Severe Thunderstorm Warning	DLH	Ashland, Bayfield, Sawyer	38 min
Aug 10, 12:21 PM CDT	Severe Thunderstorm Warning	DLH	Ashland, Iron	39 min

Nearby

Special Weather Statements in Minnesota, 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.