Alert archive / South Dakota / Special Weather Statements in 2021

Special Weather Statement, NWS Aberdeen, SD

May 24, 20215 counties in South Dakota

NWS Aberdeen, SD issued this special weather statement at May 24, 2021, 1:00 AM CDT for 5 counties in South Dakota. It was in force for 60 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 24, 2021, 1:00 AM CDT (06:00 UTC)
Expired
May 24, 2021, 2:00 AM CDT
In force
60 min
Issued by
NWS Aberdeen, SD

Counties Codington County, SD, Deuel County, SD, Grant County, SD, Hamlin County, SD, Roberts County, SD

The radar

The Aberdeen radar (KABR), 117 km from the middle of the area, began a volume at 05:59 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, 6.0 hours before the alert went out and 118 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-pSkew-T log-p diagram, Aberdeen, SD at 00:00Z on 2021-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 407 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 2021-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 97 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
407 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
2081 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
97 m²/s²
0-3 km storm-relative helicity
173 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

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 May 24, 12:29 AM CDT, 31 minutes earlier.

Area forecast discussion, May 24, 12:29 AM CDT, 31 minutes before
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Hazardous weather outlook, May 23, 4:43 AM CDT, 20 hours 17 minutes before
Hazardous Weather Outlook
National Weather Service Aberdeen SD
443 AM CDT Sun May 23 2021

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-240945-
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-
443 AM CDT Sun May 23 2021 /343 AM MDT Sun May 23 2021/

This Hazardous Weather Outlook is for west central Minnesota,
central South Dakota, north central South Dakota and northeast
South Dakota.

.DAY ONE...Today and tonight.

Strong to severe storms are expected to develop this afternoon across
eastern Wyoming and western South Dakota, then move into central
South Dakota by this evening. Large hail up to golf ball size and
damaging winds in excess of 70 mph are possible. There is a threat
for a couple tornadoes as well, mainly west of the Missouri River.
The severe threat looks to diminish as storms approach the James
River later tonight.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be requested this evening. 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.

TMT

In the hours before

Special weather statement, May 24, 12:14 AM CDT, 46 minutes before
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Local storm report, May 24, 12:22 AM CDT, 38 minutes before
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Local storm report, May 24, 12:30 AM CDT, 30 minutes before
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Local storm report, May 24, 12:44 AM CDT, 16 minutes before
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Special weather statement, May 24, 12:55 AM CDT, 5 minutes before
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Special weather statement, May 24, 1:00 AM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 23, 7:59 PM CDTSevere Thunderstorm WarningABRDewey46 min
May 23, 9:37 PM CDTSpecial Weather StatementABRHughes23 min
May 23, 10:04 PM CDTSevere Thunderstorm WarningABRBuffalo, Hughes, Lyman41 min
May 23, 10:14 PM CDTSevere Thunderstorm WarningABRBuffalo, Faulk, Hand, Hughes, Hyde, Lyman and 2 more46 min
May 23, 10:46 PM CDTSevere Thunderstorm WarningABRBuffalo, Faulk, Hand, Hyde, Potter, Sully44 min
May 23, 11:06 PM CDTSpecial Weather StatementABREdmunds, Walworth24 min
May 23, 11:23 PM CDTSpecial Weather StatementABRSpink37 min
May 23, 11:30 PM CDTSevere Thunderstorm WarningABRCampbell, Edmunds, Faulk, McPherson, Walworth45 min
May 24, 12:03 AM CDTSpecial Weather StatementABRBrown42 min
May 24, 12:11 AM CDTSevere Thunderstorm WarningABRBrown, Day, McPherson, Marshall, Spink49 min
May 24, 12:14 AM CDTSpecial Weather StatementABRClark, Day46 min
May 24, 12:55 AM CDTSpecial Weather StatementABRMarshall35 min
May 24, 1:17 AM CDTSpecial Weather StatementABRRoberts43 min
May 24, 2:59 PM CDTWind AdvisoryABRBrown, Campbell, Corson, Day, Dewey, Edmunds and 4 more28 hr
May 24, 1:48 AM CDTSpecial Weather StatementABRBig Stone, Traverse42 min

Nearby

Special Weather Statements in South Dakota, 2021Every 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.