Alert archive / Minnesota / Tornado Warnings in 2010

Tornado Warning 17, NWS Duluth, MN

June 21, 2010Aitkin County, Itasca County, Saint Louis County, Minnesota

NWS Duluth, MN issued this tornado warning at Jun 21, 2010, 5:15 PM CDT for Aitkin County, Itasca County, Saint Louis County, Minnesota. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 21, 2010, 5:15 PM CDT (22:15 UTC)
Expired: Jun 21, 2010, 6:00 PM CDT
In force: 45 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon

Counties Aitkin County, MN, Itasca County, MN, Saint Louis County, MN

The radar

The Duluth radar (KDLH), 85 km from the middle of the area, began a volume at 22:15 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 12:00Z, 10.3 hours before the alert went out and 149 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: 145 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 1184 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this tornado warning 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 tornado warning went out at Jun 21, 3:50 PM CDT, 1 hour 25 minutes earlier.

Area forecast discussion, Jun 21, 3:50 PM CDT, 1 hour 25 minutes before

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Hazardous weather outlook, Jun 21, 2:45 PM CDT, 2 hours 30 minutes before

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In the hours before

Special weather statement, Jun 21, 2:50 PM CDT, 2 hours 25 minutes before

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Special weather statement, Jun 21, 3:45 PM CDT, 1 hour 30 minutes before

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Special weather statement, Jun 21, 3:49 PM CDT, 1 hour 26 minutes before

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Special weather statement, Jun 21, 4:27 PM CDT, 48 minutes before

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Special weather statement, Jun 21, 4:33 PM CDT, 42 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
Jun 21, 6:24 AM CDT	Special Weather Statement	DLH	Pine	51 min
Jun 21, 3:49 PM CDT	Special Weather Statement	DLH	Koochiching	26 min
Jun 21, 4:12 PM CDT	Tornado Warning	DLH	Koochiching	33 min
Jun 21, 4:27 PM CDT	Special Weather Statement	DLH	Carlton	18 min
Jun 21, 4:57 PM CDT	Tornado Warning	DLH	Carlton, Saint Louis	33 min
Jun 21, 5:34 PM CDT	Tornado Warning	DLH	Carlton, Saint Louis	26 min
Jun 21, 6:10 PM CDT	Special Weather Statement	DLH	Carlton	20 min
Jun 21, 6:19 PM CDT	Special Weather Statement	DLH	Koochiching	56 min
Jun 21, 6:35 PM CDT	Special Weather Statement	DLH	Carlton	25 min
Jun 21, 6:36 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Koochiching	54 min
Jun 21, 6:42 PM CDT	Special Weather Statement	DLH	Cass	63 min
Jun 21, 6:53 PM CDT	Tornado Warning	DLH	Itasca, Koochiching	52 min
Jun 21, 2:50 PM CDT	Special Weather Statement	DLH	Price	25 min
Jun 21, 3:45 PM CDT	Special Weather Statement	DLH	Ashland, Iron	60 min
Jun 21, 4:33 PM CDT	Special Weather Statement	DLH	Ashland, Iron, Sawyer	57 min
Jun 21, 5:30 PM CDT	Special Weather Statement	DLH	Ashland, Iron, Price	30 min
Jun 21, 5:56 PM CDT	Special Weather Statement	DLH	Iron, Price	34 min

Nearby

Tornado Warnings in Minnesota, 2010 Every tornado warning in 2010 Tornadoes in 2010

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.