Alert archive / South Dakota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 160, NWS Aberdeen, SD

August 13, 20174 counties in South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 13, 2017, 11:29 AM CDT for 4 counties in South Dakota. It was in force for 32 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 13, 2017, 11:29 AM CDT (16:29 UTC)
Expired: Aug 13, 2017, 12:01 PM CDT
In force: 32 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Clark County, SD, Codington County, SD, Deuel County, SD, Hamlin County, SD

The radar

The Aberdeen radar (KABR), 119 km from the middle of the area, began a volume at 16:32 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 12:00Z, 4.5 hours before the alert went out and 96 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: 308 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 693 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 178 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 Aberdeen, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 13, 6:28 AM CDT, 5 hours 1 minute earlier.

Area forecast discussion, Aug 13, 6:28 AM CDT, 5 hours 1 minute before

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Hazardous weather outlook, Aug 13, 3:46 AM CDT, 7 hours 43 minutes before

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In the hours before

Local storm report, Aug 13, 9:20 AM CDT, 2 hours 9 minutes before

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Special weather statement, Aug 13, 9:49 AM CDT, 1 hour 40 minutes before

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Local storm report, Aug 13, 10:27 AM CDT, 1 hour 2 minutes before

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Special weather statement, Aug 13, 10:31 AM CDT, 58 minutes before

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Local storm report, Aug 13, 10:46 AM CDT, 43 minutes before

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Special weather statement, Aug 13, 11:25 AM CDT, 4 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
Aug 12, 7:14 PM CDT	Severe Thunderstorm Warning	ABR	Corson	46 min
Aug 12, 7:20 PM CDT	Special Weather Statement	ABR	Roberts	25 min
Aug 12, 7:54 PM CDT	Severe Thunderstorm Warning	ABR	Corson	51 min
Aug 12, 8:20 PM CDT	Special Weather Statement	ABR	Dewey	55 min
Aug 12, 8:32 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Sully	43 min
Aug 12, 9:12 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Sully	63 min
Aug 12, 9:42 PM CDT	Flash Flood Warning	ABR	Corson	6 hr
Aug 12, 10:34 PM CDT	Areal Flood Warning	ABR	Codington	6 hr
Aug 13, 7:22 AM CDT	Special Weather Statement	ABR	Clark	53 min
Aug 13, 9:49 AM CDT	Special Weather Statement	ABR	Hamlin	41 min
Aug 13, 10:31 AM CDT	Special Weather Statement	ABR	Deuel	44 min
Aug 13, 11:25 AM CDT	Special Weather Statement	ABR	Hamlin	50 min
Aug 13, 4:30 PM CDT	Special Weather Statement	ABR	Big Stone	30 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2017 Every severe thunderstorm warning in 2017

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.