Alert archive / South Dakota / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 102, NWS Aberdeen, SD

June 28, 2018Corson County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jun 28, 2018, 4:32 AM MDT for Corson County, South Dakota. It was in force for 43 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: Jun 28, 2018, 4:32 AM MDT (10:32 UTC)
Expired: Jun 28, 2018, 5:15 AM MDT
In force: 43 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Corson County, SD

The radar

The Bismarck radar (KBIS), 123 km from the middle of the area, began a volume at 10:35 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

Bismarck Municip, ND (KBIS), launched 00:00Z, 10.5 hours before the alert went out and 124 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: 2452 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 79 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 Jun 28, 2:32 AM MDT, 2 hours earlier.

Area forecast discussion, Jun 28, 2:32 AM MDT, 2 hours before

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Hazardous weather outlook, Jun 28, 2:43 AM MDT, 1 hour 49 minutes before

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In the hours before

Special weather statement, Jun 28, 4:18 AM MDT, 14 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
Jun 28, 4:18 AM MDT	Special Weather Statement	ABR	Corson	42 min
Jun 28, 5:10 AM MDT	Severe Thunderstorm Warning	ABR	Corson	37 min
Jun 28, 6:37 AM MDT	Special Weather Statement	ABR	Corson	23 min
Jun 28, 7:20 AM MDT	Special Weather Statement	ABR	Campbell	40 min
Jun 28, 7:34 AM MDT	Severe Thunderstorm Warning	ABR	Campbell, Corson	9 min
Jun 28, 7:42 AM MDT	Special Weather Statement	ABR	Jones	48 min
Jun 28, 8:09 AM MDT	Special Weather Statement	ABR	Campbell	51 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2018 Every severe thunderstorm warning in 2018

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.