Alert archive / Minnesota / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 97, NWS Duluth, MN

July 29, 2003Koochiching County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jul 29, 2003, 8:24 PM CDT for Koochiching County, Minnesota. It was in force for 51 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 29, 2003, 8:24 PM CDT (01:24 UTC)
Expired: Jul 29, 2003, 9:15 PM CDT
In force: 51 min
Issued by: NWS Duluth, MN
Area: Counties, with a storm outline in the text

County Koochiching County, MN

The radar

The Duluth radar (KDLH), 196 km from the middle of the area, began a volume at 01:26 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 29, 5:10 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 1.4 hours before the alert went out and 51 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: 449 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 2131 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 29, 3:15 PM CDT, 5 hours 9 minutes earlier.

Area forecast discussion, Jul 29, 3:15 PM CDT, 5 hours 9 minutes before

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Hazardous weather outlook, Jul 29, 7:30 AM CDT, 12 hours 54 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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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 29, 7:26 PM CDT	Severe Thunderstorm Warning	DLH	Cass	64 min
Jul 30, 11:29 AM CDT	Severe Thunderstorm Warning	DLH	Cass	61 min
Jul 30, 2:01 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Saint Louis	59 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2003 Every severe thunderstorm warning in 2003

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.