Alert archive / Iowa / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 233, NWS Sioux Falls, SD

August 10, 2010Dickinson County, Iowa; Jackson County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 10, 2010, 1:39 PM CDT for Dickinson County, Iowa; Jackson 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 10, 2010, 1:39 PM CDT (18:39 UTC)
Expired: Aug 10, 2010, 2:15 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 Dickinson County, IA, Jackson County, MN

The radar

The Sioux Falls radar (KFSD), 127 km from the middle of the area, began a volume at 18:41 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

Minneapolis, MN (KMPX), launched 12:00Z, 6.7 hours before the alert went out and 192 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: 1574 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 785 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 0 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 Sioux Falls, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 10, 12:20 PM CDT, 1 hour 19 minutes earlier.

Area forecast discussion, Aug 10, 12:20 PM CDT, 1 hour 19 minutes before

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Hazardous weather outlook, Aug 10, 12:01 PM CDT, 1 hour 38 minutes before

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In the hours before

Local storm report, Aug 10, 8:25 AM CDT, 5 hours 14 minutes before

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Local storm report, Aug 10, 8:34 AM CDT, 5 hours 5 minutes before

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Local storm report, Aug 10, 9:11 AM CDT, 4 hours 28 minutes before

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Local storm report, Aug 10, 10:28 AM CDT, 3 hours 11 minutes before

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Local storm report, Aug 10, 11:10 AM CDT, 2 hours 29 minutes before

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Local storm report, Aug 10, 11:11 AM CDT, 2 hours 28 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 10, 3:10 AM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Douglas, Gregory	35 min
Aug 10, 4:25 AM CDT	Flash Flood Warning	FSD	Lincoln, Minnehaha	2 hr
Aug 10, 9:03 AM CDT	River Flood Warning	FSD	Lincoln, Union	5 days
Aug 10, 9:03 AM CDT	River Flood Warning	FSD	Union	5 days
Aug 10, 9:03 AM CDT	River Flood Warning	FSD	Bon Homme, Charles Mix	50 days
Aug 10, 9:03 AM CDT	River Flood Warning	FSD	Bon Homme	118 days
Aug 10, 9:03 AM CDT	River Flood Warning	FSD	Bon Homme	118 days
Aug 10, 9:09 AM CDT	River Flood Warning	FSD	Turner	24 hr
Aug 10, 4:22 AM CDT	Heat Advisory	FSD	Buena Vista, Cherokee, Ida, Woodbury	7 hr
Aug 10, 6:47 AM CDT	Flash Flood Warning	FSD	Clay, Dickinson, O'Brien, Osceola	3 hr
Aug 10, 9:03 AM CDT	River Flood Warning	FSD	O'Brien	49 hr
Aug 10, 9:03 AM CDT	River Flood Warning	FSD	Sioux	4 days
Aug 10, 9:03 AM CDT	River Flood Warning	FSD	Plymouth	12 hr
Aug 10, 9:03 AM CDT	River Flood Warning	FSD	Clay	4 days
Aug 10, 9:03 AM CDT	River Flood Warning	FSD	Clay	6 days
Aug 10, 9:03 AM CDT	River Flood Warning	FSD	Cherokee	8 days
Aug 10, 9:03 AM CDT	River Flood Warning	FSD	Lyon	12 hr
Aug 10, 4:55 AM CDT	Severe Thunderstorm Warning	FSD	Rock	35 min
Aug 10, 5:42 AM CDT	Flash Flood Warning	FSD	Nobles, Rock	67 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2010 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.