Alert archive / South Dakota / Special Weather Statements in 2018

Special Weather Statement, NWS Aberdeen, SD

May 23, 2018Day County, South Dakota

NWS Aberdeen, SD issued this special weather statement at May 23, 2018, 5:21 PM CDT for Day County, South Dakota. It was in force for 24 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: May 23, 2018, 5:21 PM CDT (22:21 UTC)
Expired: May 23, 2018, 5:45 PM CDT
In force: 24 min
Issued by: NWS Aberdeen, SD

County Day County, SD

The radar

The Aberdeen radar (KABR), 56 km from the middle of the area, began a volume at 22:20 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

Aberdeen, SD (KABR), launched 12:00Z, 10.4 hours before the alert went out and 73 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1843 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 176 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

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 May 23, 3:51 PM CDT, 1 hour 30 minutes earlier.

Area forecast discussion, May 23, 3:51 PM CDT, 1 hour 30 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, May 23, 3:48 PM CDT, 1 hour 33 minutes before

Hazardous Weather Outlook
National Weather Service Aberdeen SD
348 PM CDT Wed May 23 2018

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-242100-
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-
348 PM CDT Wed May 23 2018 /248 PM MDT Wed May 23 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...This Afternoon and Tonight

Thunderstorms are possible through this evening, with large hail
and damaging winds being the main threats especially along and
west of the James River Valley

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Strong to severe storms are possible across eastern South Dakota
and west central Minnesota Thursday afternoon and evening. Large
hail and strong winds are the main threats.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be necessary late this afternoon and
evening.

In the hours before

Special weather statement, May 23, 5:06 PM CDT, 15 minutes before

Special Weather Statement
National Weather Service Aberdeen SD
506 PM CDT WED MAY 23 2018

SDZ006-232230-
Brown SD-
506 PM CDT WED MAY 23 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL BROWN COUNTY UNTIL
530 PM CDT...

At 505 PM CDT, Doppler radar was tracking a strong thunderstorm near
Westport, or 12 miles north of Aberdeen, moving north at 30 mph.

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

Locations impacted include...
Frederick, Columbia, Westport, Barnard, Sand Lake Wildlife Refuge and
Houghton.

LAT...LON 4556 9829 4552 9842 4557 9854 4585 9855
      4582 9814
TIME...MOT...LOC 2205Z 185DEG 26KT 4564 9841

Telken

Special weather statement, May 23, 5:21 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Aberdeen SD
521 PM CDT WED MAY 23 2018

SDZ011-232245-
Day SD-
521 PM CDT WED MAY 23 2018

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN DAY COUNTY UNTIL 545 PM
CDT...

At 521 PM CDT, Doppler radar was tracking a strong thunderstorm over
Butler, or 11 miles west of Webster, moving north at 35 mph.

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

Locations impacted include...
Bristol, Roslyn, Pierpont and Butler.

LAT...LON 4519 9768 4525 9786 4556 9791 4551 9742
TIME...MOT...LOC 2221Z 189DEG 32KT 4529 9774

Telken

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 1:40 AM CDT	Special Weather Statement	ABR	Buffalo, Lyman	65 min
May 23, 1:44 AM CDT	Special Weather Statement	ABR	Stanley	46 min
May 23, 2:36 AM CDT	Special Weather Statement	ABR	Dewey	39 min
May 23, 3:09 AM CDT	Special Weather Statement	ABR	Dewey	51 min
May 23, 5:32 AM CDT	Special Weather Statement	ABR	Day	43 min
May 23, 6:06 AM CDT	Special Weather Statement	ABR	Codington	39 min
May 23, 5:06 PM CDT	Special Weather Statement	ABR	Brown	24 min
May 23, 6:29 PM CDT	Special Weather Statement	ABR	Brown	31 min
May 23, 6:43 PM CDT	Severe Thunderstorm Warning	ABR	Brown	32 min

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.