Alert archive / South Dakota / Special Weather Statements in 2018

Special Weather Statement, NWS Aberdeen, SD

June 11, 2018Walworth County, South Dakota

NWS Aberdeen, SD issued this special weather statement at Jun 11, 2018, 12:39 AM CDT for Walworth County, 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 outline as issued.

The facts

Issued: Jun 11, 2018, 12:39 AM CDT (05:39 UTC)
Expired: Jun 11, 2018, 1:30 AM CDT
In force: 51 min
Issued by: NWS Aberdeen, SD

County Walworth County, SD

The radar

The Aberdeen radar (KABR), 104 km from the middle of the area, began a volume at 05:42 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 nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 5.7 hours before the alert went out and 178 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: 1503 J/kg
Mixed-layer CIN: -160 J/kg
Mixed-layer LCL: 2075 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 261 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jun 11, 12:38 AM CDT, 1 minute earlier.

Area forecast discussion, Jun 11, 12:38 AM CDT, 1 minute before

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Hazardous weather outlook, Jun 10, 3:38 AM CDT, 21 hours 1 minute before

Hazardous Weather Outlook
National Weather Service Aberdeen SD
338 AM CDT Sun Jun 10 2018

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-110845-
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-
338 AM CDT Sun Jun 10 2018 /238 AM MDT Sun Jun 10 2018/

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

Showers and thunderstorms are expected to develop across the
western part of the state late this afternoon, then will track
east across the remainder of the state this evening and through
the overnight hours. Severe weather is possible, with gusty winds
being the main threat, however, some of the storms may produce
large hail as well.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be requested. Weather spotters are
encouraged to submit reports to the National Weather Service in
Aberdeen. The public can submit reports on our web page, Facebook
page, or our Twitter feed.

Parkin

In the hours before

Special weather statement, Jun 10, 11:35 PM CDT, 1 hour 4 minutes before

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Special weather statement, Jun 10, 11:39 PM CDT, 1 hour before

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Special weather statement, Jun 10, 11:51 PM CDT, 48 minutes before

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Special weather statement, Jun 11, 12:03 AM CDT, 36 minutes before

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Local storm report, Jun 11, 12:24 AM CDT, 15 minutes before

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Special weather statement, Jun 11, 12:39 AM CDT, 0 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 10, 8:21 PM CDT	Special Weather Statement	ABR	Corson	39 min
Jun 10, 9:00 PM CDT	Severe Thunderstorm Warning	ABR	Corson	25 min
Jun 10, 9:27 PM CDT	Special Weather Statement	ABR	Corson	48 min
Jun 10, 10:51 PM CDT	Special Weather Statement	ABR	Campbell	39 min
Jun 10, 11:27 PM CDT	Severe Thunderstorm Warning	ABR	Campbell	20 min
Jun 10, 11:35 PM CDT	Special Weather Statement	ABR	Campbell	25 min
Jun 10, 11:39 PM CDT	Special Weather Statement	ABR	Dewey	36 min
Jun 10, 11:51 PM CDT	Special Weather Statement	ABR	Campbell	39 min
Jun 11, 12:03 AM CDT	Special Weather Statement	ABR	Walworth	42 min
Jun 11, 12:09 AM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	12 min
Jun 11, 1:25 AM CDT	Special Weather Statement	ABR	Edmunds, Faulk, Hand, Hyde	50 min
Jun 11, 3:14 AM CDT	Special Weather Statement	ABR	Lyman	46 min
Jun 11, 3:39 AM CDT	Severe Thunderstorm Warning	ABR	Lyman	36 min
Jun 11, 4:07 AM CDT	Severe Thunderstorm Warning	ABR	Buffalo, Hand, Hyde, Lyman	23 min
Jun 11, 10:54 AM CDT	Areal Flood Warning	ABR	Codington	3 hr

Nearby

Special Weather Statements in South Dakota, 2018 Every special weather statement in 2018

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.