Alert archive / South Dakota / Special Weather Statements in 2021

Special Weather Statement, NWS Aberdeen, SD

August 24, 2021Day County, Roberts County, South Dakota; Traverse County, Minnesota

NWS Aberdeen, SD issued this special weather statement at Aug 24, 2021, 6:06 AM CDT for Day County, Roberts County, South Dakota; Traverse County, Minnesota. 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: Aug 24, 2021, 6:06 AM CDT (11:06 UTC)
Expired: Aug 24, 2021, 6:30 AM CDT
In force: 24 min
Issued by: NWS Aberdeen, SD
Hail: 0.88 in
Wind: 55

Counties Traverse County, MN, Day County, SD, Roberts County, SD

The radar

The Aberdeen radar (KABR), 105 km from the middle of the area, began a volume at 11:09 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 00:00Z, 11.1 hours before the alert went out and 129 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: 142 J/kg
Mixed-layer CIN: -222 J/kg
Mixed-layer LCL: 2124 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 173 m²/s²
0-3 km storm-relative helicity: 342 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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 Aug 24, 4:31 AM CDT, 1 hour 35 minutes earlier.

Area forecast discussion, Aug 24, 4:31 AM CDT, 1 hour 35 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, Aug 24, 5:54 AM CDT, 12 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>

In the hours before

Local storm report, Aug 24, 12:45 AM CDT, 5 hours 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
1245 AM CDT TUE AUG 24 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1233 AM     TSTM WND GST     7 N FREDERICK           45.93N 98.53W
08/24/2021  M91 MPH          BROWN              SD   MESONET

            MESONET STATION 49 FREDERICK (SDDOT).

&&

KS

Local storm report, Aug 24, 1:41 AM CDT, 4 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
141 AM CDT TUE AUG 24 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1228 AM     TSTM WND GST     17 W POLO               44.78N 99.45W
08/24/2021  M62 MPH          HYDE               SD   MESONET

            MESONET STATION 215 JCT SD47/SD26 (SDDOT).

&&

TMT

Local storm report, Aug 24, 1:47 AM CDT, 4 hours 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
147 AM CDT TUE AUG 24 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1228 AM     HAIL             3 W BURKMERE            45.05N 99.37W
08/24/2021  E1.00 INCH       FAULK              SD   STORM CHASER

&&

TMT

Special weather statement, Aug 24, 2:52 AM CDT, 3 hours 14 minutes before

Special Weather Statement
National Weather Service Aberdeen SD
252 AM CDT Tue Aug 24 2021

MNZ039-046-SDZ008-020-021-240900-
Traverse MN-Big Stone MN-Grant SD-Codington SD-Roberts SD-
252 AM CDT Tue Aug 24 2021

...Strong thunderstorms will impact portions of Traverse, Big Stone,
eastern Roberts, Grant and northeastern Codington Counties through
400 AM CDT...

At 252 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Immanuel Church to near South Shore.
Movement was east at 40 mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Strong thunderstorms will be near...
  Tintah and Immanuel Church around 300 AM CDT.
  Charlesville around 305 AM CDT.
  Strandburg around 310 AM CDT.

Other locations in the path of these storms include Milbank, La Bolt,
Revillo and Albee.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 900 AM CDT for
west central Minnesota.

&&

LAT...LON 4522 9627 4525 9629 4527 9645 4498 9646
      4498 9654 4511 9707 4602 9648 4602 9627
      4542 9624 4541 9612 4518 9610
TIME...MOT...LOC 0752Z 276DEG 35KT 4591 9647 4515 9695

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

TDK

Local storm report, Aug 24, 5:58 AM CDT, 8 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>

Special weather statement, Aug 24, 6:06 AM CDT, 0 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>

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 23, 7:12 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	48 min
Aug 23, 8:42 PM CDT	Severe Thunderstorm Warning	ABR	Corson	48 min
Aug 23, 9:13 PM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	47 min
Aug 23, 9:39 PM CDT	Tornado Warning	ABR	Corson	25 min
Aug 23, 10:01 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, Dewey, Walworth	59 min
Aug 23, 10:17 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Walworth	43 min
Aug 23, 10:45 PM CDT	Special Weather Statement	ABR	Campbell	30 min
Aug 23, 10:56 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Walworth	64 min
Aug 23, 11:02 PM CDT	Special Weather Statement	ABR	Campbell	43 min
Aug 23, 11:51 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Faulk, Potter	54 min
Aug 24, 12:01 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, McPherson	59 min
Aug 24, 12:56 AM CDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Brown, Day, Marshall	64 min
Aug 24, 1:05 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, Faulk, Hand, Spink	55 min
Aug 24, 2:52 AM CDT	Special Weather Statement	ABR	Grant	68 min
Aug 24, 6:50 AM CDT	Special Weather Statement	ABR	Grant	25 min

Nearby

Special Weather Statements in South Dakota, 2021 Special Weather Statements in Minnesota, 2021 Every special weather statement in 2021

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.