Alert archive / South Dakota / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 77, NWS Aberdeen, SD

June 21, 2014Stanley County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jun 21, 2014, 4:44 PM MDT for Stanley County, South Dakota. It was in force for 46 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 21, 2014, 4:44 PM MDT (22:44 UTC)
Expired: Jun 21, 2014, 5:30 PM MDT
In force: 46 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Stanley County, SD

The radar

The Rapid City radar (KUDX), 170 km from the middle of the area, began a volume at 22:43 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jun 21, 1:56 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Rapid City, SD (KRAP), launched 12:00Z, 10.7 hours before the alert went out and 175 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: 219 J/kg
Mixed-layer CIN: -328 J/kg
Mixed-layer LCL: 2000 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 21, 2:49 PM MDT, 1 hour 55 minutes earlier.

Area forecast discussion, Jun 21, 2:49 PM MDT, 1 hour 55 minutes before

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Hazardous weather outlook, Jun 21, 2:50 AM MDT, 13 hours 54 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ABERDEEN SD
350 AM CDT SAT JUN 21 2014

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-220900-
TRAVERSE-BIG STONE-CORSON-CAMPBELL-MCPHERSON-BROWN-MARSHALL-
ROBERTS-WALWORTH-EDMUNDS-DAY-DEWEY-POTTER-FAULK-SPINK-CLARK-
CODINGTON-GRANT-HAMLIN-DEUEL-STANLEY-SULLY-HUGHES-HYDE-HAND-JONES-
LYMAN-BUFFALO-
350 AM CDT SAT JUN 21 2014 /250 AM MDT SAT JUN 21 2014/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL
MINNESOTA...CENTRAL SOUTH DAKOTA...NORTH CENTRAL SOUTH DAKOTA AND
NORTHEAST SOUTH DAKOTA.

.DAY ONE...TODAY AND TONIGHT

A FRONT WILL MOVE FROM WEST TO EAST ACROSS THE REGION. THUNDERSTORMS
ARE EXPECTED TO DEVELOP ALONG THE FRONT LATER THIS AFTERNOON AND
PERSIST THROUGH THE NIGHT. STORMS MAY BECOME SEVERE...WITH STRONG WINDS
AND DAMAGING HAIL THE MAIN THREAT...BUT LOCALLY HEAVY RAINFALL IS
ALSO OF CONCERN.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

THE FRONT WILL LINGER ACROSS EASTERN SOUTH DAKOTA AND WEST
CENTRAL MINNESOTA SUNDAY...WITH ADDITIONAL THUNDERSTORMS POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY TODAY.

SERR

In the hours before

Local storm report, Jun 21, 2:58 PM MDT, 1 hour 46 minutes before

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Local storm report, Jun 21, 3:18 PM MDT, 1 hour 26 minutes before

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Local storm report, Jun 21, 3:48 PM MDT, 56 minutes before

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Special weather statement, Jun 21, 4:05 PM MDT, 39 minutes before

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Local storm report, Jun 21, 4:29 PM MDT, 15 minutes before

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Local storm report, Jun 21, 4:42 PM MDT, 2 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 20, 11:00 PM MDT	River Flood Warning	ABR	Dewey	10 hr
Jun 21, 11:48 AM MDT	Flash Flood Watch	ABR	Brown, Campbell, Clark, Codington, Day, Deuel and 10 more	15 hr
Jun 21, 1:40 PM MDT	Severe Thunderstorm Warning	ABR	Campbell, Corson	50 min
Jun 21, 2:27 PM MDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, McPherson, Walworth	48 min
Jun 21, 3:12 PM MDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, McPherson, Walworth	63 min
Jun 21, 3:21 PM MDT	Severe Thunderstorm Warning	ABR	McPherson	39 min
Jun 21, 3:51 PM MDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk, McPherson, Walworth	54 min
Jun 21, 4:43 PM MDT	Severe Thunderstorm Warning	ABR	Edmunds	47 min
Jun 21, 5:17 PM MDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, Faulk, Spink	43 min
Jun 21, 5:18 PM MDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Stanley, Sully	57 min
Jun 21, 5:29 PM MDT	Severe Thunderstorm Warning	ABR	McPherson	46 min
Jun 21, 5:45 PM MDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, Faulk, Spink	45 min
Jun 21, 5:47 PM MDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Sully, Walworth	58 min
Jun 21, 5:50 PM MDT	Severe Thunderstorm Warning	ABR	Dewey	22 min
Jun 21, 5:56 PM MDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk, Spink	49 min
Jun 21, 9:37 AM MDT	Areal Flood Warning	ABR	Traverse	36 hr

Nearby

Severe Thunderstorm Warnings in South Dakota, 2014 Every severe thunderstorm warning in 2014

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.