Alert archive / South Dakota / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 199, NWS Aberdeen, SD

July 31, 20204 counties in South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 31, 2020, 8:21 PM CDT for 4 counties in South Dakota. It was in force for 39 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 31, 2020, 8:21 PM CDT (01:21 UTC)
Expired: Jul 31, 2020, 9:00 PM CDT
In force: 39 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Brown County, SD, Clark County, SD, Day County, SD, Spink County, SD

The radar

The Aberdeen radar (KABR), 43 km from the middle of the area, began a volume at 01:21 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.

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.

In the hours before

Local storm report, Jul 31, 7:25 PM CDT, 56 minutes before

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Local storm report, Jul 31, 7:30 PM CDT, 51 minutes before

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Local storm report, Jul 31, 7:32 PM CDT, 49 minutes before

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Local storm report, Jul 31, 7:34 PM CDT, 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
734 PM CDT FRI JUL 31 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0724 PM     TSTM WND GST     9 NNW VIVIAN            44.05N 100.33W
07/31/2020  M58 MPH          LYMAN              SD   MESONET

            MESONET STATION 13 VIVIAN (SDDOT).

&&

KF

Local storm report, Jul 31, 7:46 PM CDT, 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
746 PM CDT FRI JUL 31 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0739 PM     TSTM WND GST     CRAVENS CORNER          45.45N 98.93W
07/31/2020  M78 MPH          EDMUNDS            SD   MESONET

            MESONET STATION 173 CRAVEN (SDDOT).

&&

Special weather statement, Jul 31, 8:02 PM CDT, 19 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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 31, 7:09 PM CDT	Special Weather Statement	ABR	Faulk, Hand, Hyde	51 min
Jul 31, 7:14 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk, Potter, Walworth	46 min
Jul 31, 7:25 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Hughes, Hyde, Jones, Lyman, Stanley	65 min
Jul 31, 7:29 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Walworth	31 min
Jul 31, 7:53 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, Faulk, Hand, Spink	67 min
Jul 31, 8:02 PM CDT	Special Weather Statement	ABR	Hand, Hyde	43 min
Jul 31, 8:31 PM CDT	Special Weather Statement	ABR	Buffalo, Lyman	44 min
Jul 31, 9:00 PM CDT	Special Weather Statement	ABR	Spink	45 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2020 Every severe thunderstorm warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.