Alert archive / Minnesota / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 262, NWS Sioux Falls, SD

August 30, 2010Murray County, Pipestone County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 30, 2010, 10:24 PM CDT for Murray County, Pipestone County, Minnesota. It was in force for 36 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: Aug 30, 2010, 10:24 PM CDT (03:24 UTC)
Expired: Aug 30, 2010, 11:00 PM CDT
In force: 36 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Murray County, MN, Pipestone County, MN

The radar

The Sioux Falls radar (KFSD), 75 km from the middle of the area, began a volume at 03:25 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
Aug 30, 6:44 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 3.4 hours before the alert went out and 213 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: 875 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1007 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.2

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 Sioux Falls, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 30, 8:30 PM CDT, 1 hour 54 minutes earlier.

Area forecast discussion, Aug 30, 8:30 PM CDT, 1 hour 54 minutes before

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Hazardous weather outlook, Aug 30, 10:04 AM CDT, 12 hours 20 minutes before

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In the hours before

Local storm report, Aug 30, 6:44 PM CDT, 3 hours 40 minutes before

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Local storm report, Aug 30, 7:30 PM CDT, 2 hours 54 minutes before

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Local storm report, Aug 30, 8:01 PM CDT, 2 hours 23 minutes before

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Local storm report, Aug 30, 8:23 PM CDT, 2 hours 1 minute before

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Local storm report, Aug 30, 9:26 PM CDT, 58 minutes before

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Local storm report, Aug 30, 9:29 PM CDT, 55 minutes before

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The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 30, 7:07 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison, Hanson, Sanborn	23 min
Aug 30, 7:19 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Hutchinson, Turner, Yankton	26 min
Aug 30, 10:33 PM CDT	Flash Flood Warning	FSD	Aurora, Davison, Sanborn	3 hr
Aug 31, 4:13 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista	47 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2010 Every severe thunderstorm warning 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.