Alert archive / South Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 212, NWS Aberdeen, SD

August 28, 2011Faulk County, Hand County, Spink County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 28, 2011, 6:46 AM CDT for Faulk County, Hand County, Spink County, South Dakota. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 28, 2011, 6:46 AM CDT (11:46 UTC)
Expired: Aug 28, 2011, 7:30 AM CDT
In force: 44 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Faulk County, SD, Hand County, SD, Spink County, SD

The radar

The Aberdeen radar (KABR), 75 km from the middle of the area, began a volume at 11:47 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, 11.8 hours before the alert went out and 34 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: 2184 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 341 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Aug 28, 4:18 AM CDT, 2 hours 28 minutes earlier.

Area forecast discussion, Aug 28, 4:18 AM CDT, 2 hours 28 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ABERDEEN SD
418 AM CDT SUN AUG 28 2011

.SHORT TERM...TODAY THROUGH TUESDAY
ELEVATED MCS CONTINUES TO SLIDE SOUTHEAST ACROSS SOUTH CENTRAL ND
AND NOW ENTERING FAR NORTHERN SD. LOW LEVEL WAA AND ISENTROPIC
FORCING ACROSS THE AREA THIS MORNING ALONG WITH STEEP MID LEVEL
LAPSE RATES. MUCAPE VALUES ALSO ON THE ORDER OF 1000 TO 2000 J/KG.
SHEAR DECENT AS WELL SO CANNOT RULE OUT A COUPLE SEVERE STORMS
WITH PRIMARILY LARGE HAIL. HAVE INCREASED POPS TO LIKELY ACROSS
THE NORTHERN AND NORTHEAST CWA THROUGH THE MORNING HOURS. BY THE
AFTERNOON IT APPEARS THIS COMPLEX WILL HAVE SLID SOUTHEAST OF THE
AREA LEAVING BEHIND MOSTLY SUNNY SKIES. SFC HIGH BUILDS IN
OVERNIGHT WITH LIGHT WINDS AND FAIR SKIES. ADDED PATCHY FOG ACROSS
THE EASTERN CWA AS GUIDANCE HINTING AT FOG IN ABR AND ATY.
SOUNDINGS SOMEWHAT FAVORABLE AS WELL WITH DECENT INVERSION SETTING
UP. UPPER LEVEL ENERGY CONTINUES TO MOVE ACROSS THE NORTHERN
PLAINS MONDAY AFTERNOON THROUGH TUESDAY SO WILL CONTINUE THE
CHANCE OF SHOWERS AND STORMS. A BIT OF A LOW LEVEL JET SETS UP
MONDAY NIGHT BUT WEAKENS BY 12Z TUESDAY.

.LONG TERM...TUESDAY NIGHT THROUGH FRIDAY
A SHORTWAVE ALOFT AND SOME LEE SIDE TROFING AT THE SFC WILL KEEP
TSTORM CHANCES AROUND TUESDAY NIGHT AND INTO EARLY WEDNESDAY
MORNING. ANOTHER SHORTWAVE WILL MOVE THROUGH THE REGION ON
WEDNESDAY BUT SHOULD REMAIN A LITTLE FARTHER NORTH SO KEPT PRECIP
CHANCES JUST IN THE NORTHERN COUNTIES. A COLD FRONT WILL MOVE
THROUGH ON THURSDAY. DRIER AIR AND CAPPING AT THE SFC AHEAD OF THE
FRONT WILL KEEP PRECIP TO A MINIMUM UNTIL AFTER FROPA...BUT KEPT
SLIGHT CHANCES IN THROUGH THE PERIOD BECAUSE OF TIMING CONCERNS AT
THIS POINT. WITH SOUTHWEST FLOW ALOFT AND SOUTHEASTERLY SFC FLOW
AHEAD OF THE LEE SIDE TROUGH TEMPERATURES WILL BE WARM...HIGHS IN
THE UPPER 80S TO LOWER 90S...UNTIL AFTER COLD FROPA ON THURSDAY.

&&

.AVIATION...
TAFS FOR THE KABR...KATY...KPIR AND KMBG TERMINALS

VFR CONDITIONS ARE EXPECTED FOR ALL TAF LOCATIONS THIS EVENING.
EXPECT SOME SHOWERS AND THUNDERSTORMS TO MOVE SOUTHEAST ACROSS
THE REGION OUT OF NORTH DAKOTA INTO THE MORNING HOURS. SOME OF THESE
COULD AFFECT THE TAF LOCATIONS ESPECIALLY KABR. INSERTED VCTS IN THE
TAFS FOR EARLY MORNING. MAY HAVE TO AMEND AFTER STORM MOTION
BECOMES MORE CERTAIN.

&&

.ABR WATCHES/WARNINGS/ADVISORIES...
SD...NONE.
MN...NONE.
&&

SHORT TERM...TMT
LONG TERM...WISE
AVIATION...WISE

WEATHER.GOV/ABERDEEN

Hazardous weather outlook, Aug 28, 5:40 AM CDT, 1 hour 6 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ABERDEEN SD
540 AM CDT SUN AUG 28 2011

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-291045-
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-
540 AM CDT SUN AUG 28 2011 /440 AM MDT SUN AUG 28 2011/

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 WILL MOVE SOUTHEAST ACROSS PORTIONS OF THE
AREA THROUGH THE EARLY MORNING HOURS. SEVERE STORMS ARE POSSIBLE
WITH LARGE HAIL AND GUSTY WINDS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

ON AND OFF CHANCES FOR THUNDERSTORMS ARE IN THE FORECAST THROUGH
THE TIME PERIOD.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY EARLY THIS MORNING BETWEEN THE
JAMES AND MISSOURI RIVERS.

TMT

In the hours before

Local storm report, Aug 28, 5:34 AM CDT, 1 hour 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
534 AM CDT SUN AUG 28 2011

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

0445 AM     HAIL             HERREID                 45.84N 100.07W
08/28/2011  E1.00 INCH       CAMPBELL           SD   TRAINED SPOTTER

&&

TMT

Local storm report, Aug 28, 5:54 AM CDT, 52 minutes before

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Local storm report, Aug 28, 5:57 AM CDT, 49 minutes before

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Local storm report, Aug 28, 6:05 AM CDT, 41 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 4:27 AM CDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, McPherson, Walworth	63 min
Aug 28, 5:04 AM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk, Potter, Walworth	41 min
Aug 28, 5:20 AM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk, Potter, Walworth	40 min
Aug 28, 5:51 AM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk, Hand, Hyde, Potter, Spink and 1 more	54 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2011 Every severe thunderstorm warning in 2011

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.