Alert archive / South Dakota / Special Weather Statements in 2015

Special Weather Statement, NWS Aberdeen, SD

August 9, 2015Brule County, South Dakota

NWS Aberdeen, SD issued this special weather statement at Aug 9, 2015, 2:38 AM CDT for Brule County, South Dakota. It was in force for 37 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 9, 2015, 2:38 AM CDT (07:38 UTC)
Expired: Aug 9, 2015, 3:15 AM CDT
In force: 37 min
Issued by: NWS Aberdeen, SD

County Brule County, SD

The radar

The North Platte radar (KLNX), 206 km from the middle of the area, began a volume at 07:40 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, 7.6 hours before the alert went out and 166 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: 18 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 1884 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Aug 9, 12:31 AM CDT, 2 hours 7 minutes earlier.

Area forecast discussion, Aug 9, 12:31 AM CDT, 2 hours 7 minutes before

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Hazardous weather outlook, Aug 8, 4:20 AM CDT, 22 hours 18 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ABERDEEN SD
420 AM CDT SAT AUG 8 2015

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-090930-
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-
420 AM CDT SAT AUG 8 2015

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

SCATTERED THUNDERSTORMS ARE POSSIBLE TODAY ALONG AND EAST OF A
LINE FROM SISSETON TO CLARK. SEVERE STORMS ARE NOT EXPECTED.
ADDITIONAL THUNDERSTORMS ARE POSSIBLE TONIGHT...MAINLY FOR
LOCATIONS WEST OF THE JAMES RIVER VALLEY. SOME THUNDERSTORMS COULD
PRODUCE GUSTY WINDS AND SMALL HAIL.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

SCATTERED THUNDERSTORMS ARE POSSIBLE OF SUNDAY. SOME
THUNDERSTORMS COULD PRODUCE GUSTY WINDS AND SMALL HAIL.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

SD

In the hours before

Special weather statement, Aug 9, 12:38 AM CDT, 2 hours before

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Special weather statement, Aug 9, 12:42 AM CDT, 1 hour 56 minutes before

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Special weather statement, Aug 9, 2:38 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
238 AM CDT SUN AUG 9 2015

SDZ048-090815-
LYMAN SD-
238 AM CDT SUN AUG 9 2015

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN LYMAN COUNTY UNTIL
315 AM CDT...

AT 236 AM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
HAMILL...OR 14 MILES NORTHEAST OF WINNER...MOVING EAST AT 40 MPH.

HALF INCH HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS
STORM.

LAT...LON 4366 9962 4368 9947 4365 9945 4366 9940
      4366 9937 4363 9935 4357 9933 4353 9928
      4350 9929 4350 9962
TIME...MOT...LOC 0736Z 266DEG 34KT 4356 9974

SD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 7:12 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Stanley, Sully	48 min
Aug 8, 8:08 PM CDT	Special Weather Statement	ABR	Potter	52 min
Aug 8, 8:23 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Potter	52 min
Aug 8, 9:19 PM CDT	Severe Thunderstorm Warning	ABR	Jones	56 min
Aug 9, 12:38 AM CDT	Special Weather Statement	ABR	Dewey, Walworth	67 min
Aug 9, 12:42 AM CDT	Special Weather Statement	ABR	Jones	33 min
Aug 9, 3:08 AM CDT	Special Weather Statement	ABR	Edmunds, Faulk	52 min
Aug 9, 3:59 AM CDT	Special Weather Statement	ABR	Edmunds	61 min
Aug 9, 5:17 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Day	24 min
Aug 9, 7:31 AM CDT	Severe Thunderstorm Warning	ABR	Codington, Day, Grant	21 min
Aug 9, 1:00 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Potter, Walworth	45 min
Aug 9, 2:20 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk	40 min
Aug 9, 2:36 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo	39 min
Aug 9, 2:52 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Hand, Hyde, Potter	38 min
Aug 9, 3:29 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Hand, Hyde	46 min
Aug 9, 4:01 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Hand, Spink	44 min
Aug 9, 4:47 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Spink	43 min
Aug 9, 5:30 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Hamlin, Spink	45 min

Nearby

Special Weather Statements in South Dakota, 2015 Every special weather statement in 2015

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.