Alert archive / South Dakota / Special Weather Statements in 2021

Special Weather Statement, NWS Aberdeen, SD

June 20, 2021Brown County, South Dakota

NWS Aberdeen, SD issued this special weather statement at Jun 20, 2021, 2:06 AM CDT for Brown 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: Jun 20, 2021, 2:06 AM CDT (07:06 UTC)
Expired: Jun 20, 2021, 2:30 AM CDT
In force: 24 min
Issued by: NWS Aberdeen, SD

County Brown County, SD

The radar

The Aberdeen radar (KABR), 21 km from the middle of the area, began a volume at 07:06 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, 7.1 hours before the alert went out and 78 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: 2341 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 20, 12:37 AM CDT, 1 hour 29 minutes earlier.

Area forecast discussion, Jun 20, 12:37 AM CDT, 1 hour 29 minutes before

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Hazardous weather outlook, Jun 19, 12:13 PM CDT, 13 hours 53 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Aberdeen SD
1213 PM CDT Sat Jun 19 2021

MNZ039-046-SDZ004>011-016>023-034-036-037-201715-
Traverse-Big Stone-Campbell-McPherson-Brown-Marshall-Roberts-
Walworth-Edmunds-Day-Potter-Faulk-Spink-Clark-Codington-Grant-Hamlin-
Deuel-Sully-Hyde-Hand-
1213 PM CDT Sat Jun 19 2021

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

.DAY ONE...This afternoon and tonight.

Thunderstorms will be possible later tonight. Lightning will be the
main threat.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

SDZ003-015-033-035-045-048-051-201715-
Corson-Dewey-Stanley-Hughes-Jones-Lyman-Buffalo-
1213 PM CDT Sat Jun 19 2021 /1113 AM MDT Sat Jun 19 2021/

This Hazardous Weather Outlook is for central South Dakota and
north central South Dakota.

.DAY ONE...This afternoon and tonight.

A few strong to severe thunderstorms are possible this afternoon and
into the nighttime hours.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

SD

In the hours before

Local storm report, Jun 20, 12:22 AM CDT, 1 hour 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
1222 AM CDT SUN JUN 20 2021

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

1159 PM     NON-TSTM WND GST 13 N VIVIAN             44.12N 100.30W
06/19/2021  M56 MPH          LYMAN              SD   MESONET

            MESONET STATION RFPS2 VIVIAN 13 N.

&&

MC

Special weather statement, Jun 20, 12:30 AM CDT, 1 hour 36 minutes before

Special Weather Statement
National Weather Service Aberdeen SD
1230 AM CDT Sun Jun 20 2021

SDZ035-048-051-200600-
Hughes-Buffalo-Lyman-
1230 AM CDT Sun Jun 20 2021

...A SHOWER WILL AFFECT SOUTHEASTERN HUGHES...EASTERN LYMAN AND
BUFFALO COUNTIES...

At 1228 AM CDT, a shower was located near Oacoma, or 7 miles north of
Chamberlain, moving east at 45 mph.

Wind gusts of 50 to 55 mph are possible with this shower.

Locations impacted include...
Lower Brule, Fort Thompson, Oacoma, Kennebec, Reliance, Shelby, Iona,
Cedar Creek Rec Area, Crow Creek Housing, Tailrace Rec Area, Joe
Creek Rec Area, Lyman, Medicine Butte, Counselor Creek Boat Access
Area, Dude Ranch, Lake Sharpe, Etbauer Hill, Gann Valley, Byre Lake
and Lees Corner.

LAT...LON 4377 9965 4373 9967 4375 9968 4376 9968
      4376 9969 4372 9972 4374 9976 4371 9975
      4370 9986 4367 9987 4370 9996 4420 9994
      4419 9893 4394 9893 4393 9936 4386 9931
      4367 9947 4365 9936 4350 9930 4350 9963
TIME...MOT...LOC 0528Z 276DEG 37KT 4388 9933

Connelly

Special weather statement, Jun 20, 1:02 AM CDT, 1 hour 4 minutes before

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Special weather statement, Jun 20, 2:06 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 20, 12:30 AM CDT	Special Weather Statement	ABR	Buffalo, Lyman	30 min
Jun 20, 1:02 AM CDT	Special Weather Statement	ABR	McPherson	28 min
Jun 20, 4:54 AM CDT	Special Weather Statement	ABR	Jones	36 min

Nearby

Special Weather Statements in South Dakota, 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.