Alert archive / Minnesota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 129, NWS Duluth, MN

July 11, 2008Saint Louis County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jul 11, 2008, 12:15 PM CDT for 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: Jul 11, 2008, 12:15 PM CDT (17:15 UTC)
Expired: Jul 11, 2008, 1:00 PM CDT
In force: 45 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon

County Saint Louis County, MN

The radar

The Duluth radar (KDLH), 86 km from the middle of the area, began a volume at 17:18 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, 5.3 hours before the alert went out and 126 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1039 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jul 11, 10:02 AM CDT, 2 hours 13 minutes earlier.

Area forecast discussion, Jul 11, 10:02 AM CDT, 2 hours 13 minutes before

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Hazardous weather outlook, Jul 11, 10:56 AM CDT, 1 hour 19 minutes before

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In the hours before

Local storm report, Jul 11, 7:41 AM CDT, 4 hours 34 minutes before

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Local storm report, Jul 11, 10:30 AM CDT, 1 hour 45 minutes before

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Local storm report, Jul 11, 10:43 AM CDT, 1 hour 32 minutes before

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Local storm report, Jul 11, 10:49 AM CDT, 1 hour 26 minutes before

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Local storm report, Jul 11, 11:11 AM CDT, 1 hour 4 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
Jul 11, 1:34 AM CDT	Severe Thunderstorm Warning	DLH	Pine	56 min
Jul 11, 2:28 AM CDT	Severe Thunderstorm Warning	DLH	Pine	62 min
Jul 11, 6:52 AM CDT	Severe Thunderstorm Warning	DLH	Koochiching	53 min
Jul 11, 7:40 AM CDT	Severe Thunderstorm Warning	DLH	Koochiching	35 min
Jul 11, 8:24 AM CDT	Severe Thunderstorm Warning	DLH	Koochiching	66 min
Jul 11, 9:02 AM CDT	Severe Thunderstorm Warning	DLH	Koochiching, Saint Louis	27 min
Jul 11, 9:06 AM CDT	Dense Fog Advisory	DLH	Carlton, Lake, Saint Louis	4 hr
Jul 11, 10:17 AM CDT	Severe Thunderstorm Warning	DLH	Koochiching, Saint Louis	58 min
Jul 11, 11:29 AM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	31 min
Jul 11, 3:21 PM CDT	Severe Thunderstorm Warning	DLH	Cook, Lake	39 min
Jul 11, 3:23 PM CDT	Severe Thunderstorm Warning	DLH	Cook	54 min
Jul 11, 3:48 PM CDT	Special Marine Warning	DLH		72 min
Jul 11, 4:48 PM CDT	Severe Thunderstorm Warning	DLH	Cass, Crow Wing, Itasca	57 min
Jul 11, 5:41 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Cass, Crow Wing	64 min
Jul 11, 5:55 PM CDT	Severe Thunderstorm Warning	DLH	Cass, Itasca, Koochiching, Saint Louis	50 min
Jul 11, 6:27 PM CDT	Tornado Warning	DLH	Crow Wing	33 min
Jul 11, 6:35 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Itasca, Saint Louis	55 min
Jul 11, 6:44 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Crow Wing, Pine	61 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2008 Every severe thunderstorm warning in 2008

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.