Alert archive / South Dakota / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 43, NWS Aberdeen, SD

June 20, 2013Dewey County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jun 20, 2013, 5:17 PM MDT for Dewey County, South Dakota. It was in force for 58 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, 2013, 5:17 PM MDT (23:17 UTC)
Expired: Jun 20, 2013, 6:15 PM MDT
In force: 58 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Dewey County, SD

The radar

The Bismarck radar (KBIS), 180 km from the middle of the area, began a volume at 23:18 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 20, 2:26 PM MDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.3 hours before the alert went out and 180 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: 921 J/kg
Mixed-layer CIN: -317 J/kg
Mixed-layer LCL: 830 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 246 m²/s²
0-3 km storm-relative helicity: 414 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

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 20, 5:09 PM MDT, 8 minutes earlier.

Area forecast discussion, Jun 20, 5:09 PM MDT, 8 minutes before

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Hazardous weather outlook, Jun 20, 3:12 AM MDT, 14 hours 5 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ABERDEEN SD
412 AM CDT THU JUN 20 2013

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-210915-
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-
412 AM CDT THU JUN 20 2013 /312 AM MDT THU JUN 20 2013/

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

STRONG AND SEVERE STORMS ARE POSSIBLE THIS AFTERNOON AND TONIGHT
AS A FRONTAL BOUNDARY MOVES ACROSS THE REGION. THE MAIN THREATS
WILL BE LARGE HAIL AND STRONG WINDS...ALTHOUGH TORNADIC
DEVELOPMENT CANNOT BE COMPLETELY RULED OUT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THE LOW PRESSURE SYSTEM INTENSIFIES AND MOVES NORTHWARD...PUSHING
A WARM FRONT NORTH ALONG WITH IT. THIS FEATURE WILL BE OVER THE
REGION DURING PEAK HEATING HOURS ON FRIDAY. RAPID SEVERE
THUNDERSTORM DEVELOPMENT IS POSSIBLE FRIDAY AFTERNOON AND
NIGHT...WITH ALL SEVERE THREATS POSSIBLE.

THE LOW PRESSURE SYSTEM CONTINUES TO MOVE NORTHWARD...HOWEVER THE
THREAT OF SEVERE STORMS CONTINUES THROUGH THE WEEKEND. BE PREPARED
FOR RAPIDLY CHANGING CONDITIONS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT.

SERR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 10:27 PM MDT	Severe Thunderstorm Warning	ABR	Grant, Roberts	63 min
Jun 19, 11:14 PM MDT	Flash Flood Warning	ABR	Grant, Roberts	6 hr
Jun 19, 11:29 PM MDT	Severe Thunderstorm Warning	ABR	Roberts	61 min
Jun 20, 5:02 AM MDT	Flash Flood Warning	ABR	Grant, Roberts	6 hr
Jun 20, 5:06 AM MDT	Severe Thunderstorm Warning	ABR	Day	39 min
Jun 20, 5:45 AM MDT	Severe Thunderstorm Warning	ABR	Clark, Codington, Day, Grant, Marshall, Roberts	45 min
Jun 20, 7:43 AM MDT	Flash Flood Warning	ABR	Marshall, Roberts	6 hr
Jun 20, 8:20 AM MDT	River Flood Warning	ABR	Spink	77 days
Jun 20, 10:00 AM MDT	Flash Flood Watch	ABR	Brown, Clark, Codington, Day, Deuel, Grant and 4 more	68 hr

Nearby

Severe Thunderstorm Warnings in South Dakota, 2013 Every severe thunderstorm warning in 2013

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.