Alert archive / South Dakota / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 84, NWS Aberdeen, SD

July 19, 2019Corson County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 19, 2019, 2:41 AM MDT for Corson County, South Dakota. It was in force for 49 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 19, 2019, 2:41 AM MDT (08:41 UTC)
Expired: Jul 19, 2019, 3:30 AM MDT
In force: 49 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.0 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 08:43 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

Rapid City, SD (KUNR), launched 00:00Z, 8.7 hours before the alert went out and 225 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: 1645 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1566 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 304 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 13.3

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 19, 1:08 AM MDT, 1 hour 33 minutes earlier.

Area forecast discussion, Jul 19, 1:08 AM MDT, 1 hour 33 minutes before

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Hazardous weather outlook, Jul 18, 3:18 AM MDT, 23 hours 23 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 19, 2:54 AM MDT	Heat Advisory	ABR	Buffalo, Clark, Codington, Deuel, Grant, Hamlin and 3 more	16 hr
Jul 19, 3:29 AM MDT	Severe Thunderstorm Warning	ABR	Corson	46 min
Jul 19, 4:16 AM MDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	44 min
Jul 19, 4:36 AM MDT	Severe Thunderstorm Warning	ABR	Dewey	27 min
Jul 19, 6:05 AM MDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk, Potter, Walworth	40 min
Jul 19, 6:39 AM MDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, Faulk, McPherson, Spink	51 min
Jul 19, 7:28 AM MDT	Special Weather Statement	ABR	Brown	32 min
Jul 19, 7:48 AM MDT	Severe Thunderstorm Warning	ABR	Brown, Day, Marshall, Spink	42 min
Jul 19, 8:24 AM MDT	Severe Thunderstorm Warning	ABR	Brown, Day, Marshall, Roberts	36 min
Jul 19, 9:09 AM MDT	Severe Thunderstorm Warning	ABR	Day, Roberts	24 min
Jul 19, 9:48 AM MDT	Special Weather Statement	ABR	Roberts	27 min
Jul 19, 9:54 AM MDT	Severe Thunderstorm Warning	ABR	Roberts	36 min
Jul 19, 10:17 AM MDT	Severe Thunderstorm Warning	ABR	Big Stone, Traverse	27 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2019 Every severe thunderstorm warning in 2019

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.