Alert archive / South Dakota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 120, NWS Aberdeen, SD

July 21, 20174 counties in South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 21, 2017, 8:09 PM CDT for 4 counties in South Dakota. It was in force for 51 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 21, 2017, 8:09 PM CDT (01:09 UTC)
Expired: Jul 21, 2017, 9:00 PM CDT
In force: 51 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Faulk County, SD, Hyde County, SD, Potter County, SD, Sully County, SD

The radar

The Aberdeen radar (KABR), 120 km from the middle of the area, began a volume at 01:08 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 21, 3:07 PM CDT	Severe Thunderstorm Watch	SPC	10 hr

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 21, 6:34 PM CDT, 1 hour 35 minutes earlier.

Area forecast discussion, Jul 21, 6:34 PM CDT, 1 hour 35 minutes before

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Hazardous weather outlook, Jul 21, 3:41 PM CDT, 4 hours 28 minutes before

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In the hours before

Special weather statement, Jul 21, 7:21 PM CDT, 48 minutes before

Special Weather Statement
National Weather Service Aberdeen SD
721 PM CDT FRI JUL 21 2017

SDZ004-005-220045-
Campbell SD-McPherson SD-
721 PM CDT FRI JUL 21 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN CAMPBELL AND
NORTHWESTERN MCPHERSON COUNTIES UNTIL 745 PM CDT...

At 720 PM CDT, Doppler radar was tracking a strong thunderstorm near
Zeeland, or 19 miles northwest of Eureka, moving southeast at 25 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Artas and Greenway.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A severe thunderstorm watch remains in effect until 1100 PM CDT for
north central South Dakota.

LAT...LON 4594 10003 4594 9963 4574 9988 4593 10009
      4595 10007
TIME...MOT...LOC 0020Z 311DEG 21KT 4595 9993

Lueck

Special weather statement, Jul 21, 7:46 PM CDT, 23 minutes before

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Special weather statement, Jul 21, 7:52 PM CDT, 17 minutes before

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Special weather statement, Jul 21, 7:58 PM CDT, 11 minutes before

Special Weather Statement
National Weather Service Aberdeen SD
758 PM CDT FRI JUL 21 2017

SDZ003-004-015-220130-
Dewey SD-Campbell SD-Corson SD-
758 PM CDT FRI JUL 21 2017

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN CORSON...WEST CENTRAL
CAMPBELL AND NORTHEASTERN DEWEY COUNTIES UNTIL 830 PM CDT/730 PM
MDT/...

At 758 PM CDT/658 PM MDT/, Doppler radar was tracking a strong
thunderstorm near Mclaughlin, moving southeast at 45 mph.

Dime size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Wakpala, Indian Memorial Rec Area, Grand River Casino, Mahto and
Little Eagle.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A severe thunderstorm watch remains in effect until 1100 PM CDT/1000
PM MDT/ for north central South Dakota.

LAT...LON 4569 10088 4586 10069 4573 10028 4546 10062
TIME...MOT...LOC 0058Z 307DEG 38KT 4576 10078

Lueck

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 7:21 PM CDT	Special Weather Statement	ABR	Campbell	24 min
Jul 21, 7:31 PM CDT	Severe Thunderstorm Warning	ABR	Corson	44 min
Jul 21, 7:46 PM CDT	Special Weather Statement	ABR	Edmunds	44 min
Jul 21, 7:49 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds	41 min
Jul 21, 7:52 PM CDT	Special Weather Statement	ABR	Campbell	23 min
Jul 21, 7:58 PM CDT	Special Weather Statement	ABR	Corson	32 min
Jul 21, 8:14 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, McPherson	28 min
Jul 21, 8:20 PM CDT	Special Weather Statement	ABR	Edmunds	40 min
Jul 21, 8:25 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk	50 min
Jul 21, 8:52 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Hand	38 min
Jul 21, 9:21 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Walworth	11 min
Jul 21, 9:34 PM CDT	Special Weather Statement	ABR	Spink	26 min
Jul 21, 9:48 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Hand, Spink	42 min
Jul 21, 9:58 PM CDT	Severe Thunderstorm Warning	ABR	Potter	18 min
Jul 21, 10:21 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Hand, Spink	39 min
Jul 21, 10:27 PM CDT	Severe Thunderstorm Warning	ABR	Hand, Spink	48 min
Jul 21, 10:42 PM CDT	Severe Thunderstorm Warning	ABR	Spink	48 min
Jul 21, 10:44 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Spink	46 min
Jul 21, 11:11 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Spink	64 min
Jul 21, 11:13 PM CDT	Severe Thunderstorm Warning	ABR	Hand, Spink	32 min
Jul 21, 11:18 PM CDT	Severe Thunderstorm Warning	ABR	Hand, Hyde	42 min
Jul 21, 11:27 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Codington, Day, Hamlin, Spink	63 min
Jul 21, 11:47 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Hand, Hyde	28 min
Jul 22, 12:28 AM CDT	Severe Thunderstorm Warning	ABR	Codington, Deuel, Grant, Hamlin	32 min
Jul 22, 1:06 AM CDT	Special Weather Statement	ABR	Deuel	39 min
Jul 22, 3:33 AM CDT	Red Flag Warning	ABR		16 hr
Jul 22, 4:53 AM CDT	Special Weather Statement	ABR	Traverse	37 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; radar from the NEXRAD Level II archive.