Alert archive / South Dakota / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 38, NWS Aberdeen, SD

June 20, 20158 counties in South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jun 20, 2015, 12:54 AM CDT for 8 counties in 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 20, 2015, 12:54 AM CDT (05:54 UTC)
Expired: Jun 20, 2015, 1:40 AM CDT
In force: 46 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Buffalo County, SD, Faulk County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Lyman County, SD, Stanley County, SD, Sully County, SD

The radar

The Aberdeen radar (KABR), 150 km from the middle of the area, began a volume at 05:56 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 19, 10:57 PM CDT	Severe Thunderstorm Watch PDS	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 5.9 hours before the alert went out and 114 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: 44 J/kg
Mixed-layer CIN: -284 J/kg
Mixed-layer LCL: 1093 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 25 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 19, 4:11 PM CDT, 8 hours 43 minutes earlier.

Area forecast discussion, Jun 19, 4:11 PM CDT, 8 hours 43 minutes before

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Hazardous weather outlook, Jun 19, 3:45 AM CDT, 21 hours 9 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ABERDEEN SD
345 AM CDT FRI JUN 19 2015

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-201000-
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-
345 AM CDT FRI JUN 19 2015

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

SCATTERED SHOWERS AND THUNDERSTORMS ARE POSSIBLE EARLY THIS
MORNING AND INTO THE AFTERNOON HOURS. HOWEVER...OF MORE CONCERN IS
THE LOW PRESSURE SYSTEM THAT WILL MOVE FROM WEST TO EAST ACROSS
THE DAKOTAS AND INTO WEST CENTRAL MINNESOTA TONIGHT. CONDITIONS
WILL BE PRIME FOR SEVERE STORMS...WITH DAMAGING WINDS AND LARGE
HAIL A SIGNIFICANT THREAT TONIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

ON AND OFF CHANCES FOR THUNDERSTORMS EXIST THROUGH THE WEEKEND AND
INTO NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY TONIGHT.

SERR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 11:44 PM CDT	Special Weather Statement	ABR	Sully	46 min
Jun 20, 12:11 AM CDT	Severe Thunderstorm Warning	ABR	Hughes, Jones, Lyman, Stanley	49 min
Jun 20, 12:29 AM CDT	Areal Flood Warning	ABR	Hand, Hyde, Sully	60 hr
Jun 20, 1:29 AM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Hand, Hyde, Lyman, Spink, Sully	46 min
Jun 20, 5:53 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Stanley, Sully	37 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2015 Every severe thunderstorm warning in 2015

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.