Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 117, NWS Duluth, MN

July 22, 2012Koochiching County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jul 22, 2012, 2:19 PM CDT for Koochiching County, Minnesota. It was in force for 41 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 22, 2012, 2:19 PM CDT (19:19 UTC)
Expired: Jul 22, 2012, 3:00 PM CDT
In force: 41 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Koochiching County, MN

The radar

The Duluth radar (KDLH), 196 km from the middle of the area, began a volume at 19:20 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, 7.3 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1489 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 93 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 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 22, 1:25 PM CDT, 54 minutes earlier.

Area forecast discussion, Jul 22, 1:25 PM CDT, 54 minutes before

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Hazardous weather outlook, Jul 22, 6:36 AM CDT, 7 hours 43 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 22, 2:57 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	63 min
Jul 22, 3:54 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	66 min
Jul 22, 4:46 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Koochiching, Saint Louis	44 min
Jul 22, 5:23 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Koochiching, Saint Louis	37 min
Jul 22, 5:42 PM CDT	Special Weather Statement	DLH	Koochiching	33 min
Jul 22, 5:54 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Koochiching, Saint Louis	66 min
Jul 22, 6:06 PM CDT	Tornado Warning	DLH	Saint Louis	39 min
Jul 22, 6:18 PM CDT	Special Weather Statement	DLH	Itasca	12 min
Jul 22, 6:32 PM CDT	Special Weather Statement	DLH	Itasca	28 min
Jul 22, 6:44 PM CDT	Special Weather Statement	DLH	Saint Louis	31 min
Jul 22, 6:49 PM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	41 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012 Every severe thunderstorm warning in 2012

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.