Alert archive / Minnesota / Special Weather Statements in 2009

Special Weather Statement, NWS Duluth, MN

August 15, 2009Saint Louis County, Minnesota

NWS Duluth, MN issued this special weather statement at Aug 15, 2009, 2:21 AM CDT for Saint Louis County, Minnesota. It was in force for 39 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 15, 2009, 2:21 AM CDT (07:21 UTC)
Expired: Aug 15, 2009, 3:00 AM CDT
In force: 39 min
Issued by: NWS Duluth, MN

County Saint Louis County, MN

The radar

The Duluth radar (KDLH), 31 km from the middle of the area, began a volume at 07:24 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, 7.4 hours before the alert went out and 181 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: 1758 J/kg
Mixed-layer CIN: -158 J/kg
Mixed-layer LCL: 1404 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 221 m²/s²
0-3 km storm-relative helicity: 243 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 10.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 14, 7:15 PM CDT	Special Weather Statement	DLH	Koochiching	45 min
Aug 14, 8:02 PM CDT	Special Weather Statement	DLH		43 min
Aug 14, 8:39 PM CDT	Special Weather Statement	DLH	Koochiching	51 min
Aug 14, 9:00 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	43 min
Aug 14, 9:45 PM CDT	Special Weather Statement	DLH	Koochiching	45 min
Aug 14, 10:17 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	39 min
Aug 14, 11:04 PM CDT	Special Weather Statement	DLH	Koochiching	86 min
Aug 14, 11:23 PM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	67 min
Aug 14, 11:45 PM CDT	Special Weather Statement	DLH	Cass	45 min
Aug 15, 1:49 AM CDT	Special Weather Statement	DLH	Carlton	56 min
Aug 15, 2:05 AM CDT	Special Weather Statement	DLH	Lake, Saint Louis	85 min
Aug 15, 2:24 AM CDT	Special Weather Statement	DLH	Carlton	36 min
Aug 15, 2:26 AM CDT	Special Weather Statement	DLH	Carlton	34 min
Aug 15, 2:54 AM CDT	Special Weather Statement	DLH	Lake	51 min
Aug 15, 2:57 AM CDT	Special Weather Statement	DLH	Carlton	48 min
Aug 15, 3:17 AM CDT	Severe Thunderstorm Warning	DLH	Lake	23 min
Aug 15, 3:39 AM CDT	Special Weather Statement	DLH	Cook	36 min
Aug 15, 3:48 AM CDT	Special Weather Statement	DLH	Saint Louis	42 min
Aug 15, 4:10 AM CDT	Special Weather Statement	DLH	Lake	50 min
Aug 15, 5:09 AM CDT	Special Weather Statement	DLH	Koochiching	66 min
Aug 15, 6:38 AM CDT	Special Weather Statement	DLH	Koochiching	52 min
Aug 15, 3:48 PM CDT	Special Weather Statement	DLH	Koochiching	42 min
Aug 15, 4:56 PM CDT	Special Weather Statement	DLH	Koochiching	49 min
Aug 15, 5:49 PM CDT	Special Weather Statement	DLH		26 min

Nearby

Special Weather Statements in Minnesota, 2009 Every special weather statement in 2009

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.