Alert archive / South Dakota / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 140, NWS Aberdeen, SD

July 23, 2015Brown County, Day County, Marshall County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 23, 2015, 10:02 PM CDT for Brown County, Day County, Marshall County, South Dakota. It was in force for 58 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 23, 2015, 10:02 PM CDT (03:02 UTC)
Expired: Jul 23, 2015, 11:00 PM CDT
In force: 58 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Brown County, SD, Day County, SD, Marshall County, SD

The radar

The Aberdeen radar (KABR), 46 km from the middle of the area, began a volume at 03:03 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

Aberdeen, SD (KABR), launched 00:00Z, 3.0 hours before the alert went out and 86 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: 3528 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1264 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 209 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 12.1

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 Aberdeen, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 23, 9:25 PM CDT, 37 minutes earlier.

Area forecast discussion, Jul 23, 9:25 PM CDT, 37 minutes before

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In the hours before

Local storm report, Jul 23, 8:09 PM CDT, 1 hour 53 minutes before

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Local storm report, Jul 23, 8:26 PM CDT, 1 hour 36 minutes before

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Local storm report, Jul 23, 8:29 PM CDT, 1 hour 33 minutes before

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Local storm report, Jul 23, 8:30 PM CDT, 1 hour 32 minutes before

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Local storm report, Jul 23, 8:43 PM CDT, 1 hour 19 minutes before

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Special weather statement, Jul 23, 9:34 PM CDT, 28 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 7:01 PM CDT	Special Weather Statement	ABR	Corson	44 min
Jul 23, 7:20 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson	40 min
Jul 23, 7:49 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson	41 min
Jul 23, 8:24 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, McPherson	51 min
Jul 23, 9:34 PM CDT	Special Weather Statement	ABR	Brown	56 min
Jul 23, 9:48 PM CDT	Severe Thunderstorm Warning	ABR	Brown, McPherson	42 min
Jul 23, 10:19 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, McPherson	41 min
Jul 23, 10:57 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Marshall	63 min
Jul 23, 11:48 PM CDT	Severe Thunderstorm Warning	ABR	Marshall, Roberts	42 min
Jul 24, 12:16 AM CDT	Severe Thunderstorm Warning	ABR	Marshall, Roberts	44 min
Jul 24, 12:54 AM CDT	Severe Thunderstorm Warning	ABR	Roberts	28 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2015 Every severe thunderstorm warning in 2015

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.