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, 3:45 AM CDT for Koochiching County, Minnesota. It was in force for 15 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, 3:45 AM CDT (08:45 UTC)
Expired: Aug 10, 2021, 4:00 AM CDT
In force: 15 min
Issued by: NWS Duluth, MN
Hail: 0.25 in
Wind: 30

County Koochiching County, MN

The radar

The Duluth radar (KDLH), 245 km from the middle of the area, began a volume at 08:48 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, 8.8 hours before the alert went out and 61 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.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Duluth, MN wrote its last area forecast discussion before this special weather statement went out at Aug 10, 1:10 AM CDT, 2 hours 35 minutes earlier.

Area forecast discussion, Aug 10, 1:10 AM CDT, 2 hours 35 minutes before

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Hazardous weather outlook, Aug 9, 7:42 PM CDT, 8 hours 3 minutes before

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In the hours before

Special weather statement, Aug 10, 3:21 AM CDT, 24 minutes before

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Special weather statement, Aug 10, 3:45 AM CDT, 0 minutes before

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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, 3:21 AM CDT	Special Weather Statement	DLH	Koochiching	24 min
Aug 10, 3:38 AM CDT	Dense Fog Advisory	DLH	Carlton, Cook, Lake, Saint Louis	6 hr
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.