Alert archive / South Dakota / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 185, NWS Aberdeen, SD

August 25, 2005Brown County, Day County, Spink County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 25, 2005, 5:31 PM CDT for Brown County, Day 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 25, 2005, 5:31 PM CDT (22:31 UTC)
Expired
Aug 25, 2005, 6:15 PM CDT
In force
44 min
Issued by
NWS Aberdeen, SD
Area
Counties, with a storm outline in the text

Counties Brown County, SD, Day County, SD, Spink County, SD

The radar

The Aberdeen radar (KABR), 30 km from the middle of the area, began a volume at 22:33 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 25, 3:45 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 10.5 hours before the alert went out and 50 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 12:00Z on 2005-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1435 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 12:00Z on 2005-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
1435 J/kg
Mixed-layer CIN
-185 J/kg
Mixed-layer LCL
511 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
100 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 25, 3:10 PM CDT, 2 hours 21 minutes earlier.

Area forecast discussion, Aug 25, 3:10 PM CDT, 2 hours 21 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ABERDEEN SD
310 PM CDT THU AUG 25 2005

.SHORT TERM...TONIGHT THROUGH SUNDAY NIGHT
MAIN FORECAST CHALLENGE IS CONVECTION CHANCES IN THE EASTERN CWA
TONIGHT...WITH A FAIRLY BENIGN PATTERN SETTING UP FOR THE REMAINDER
OF THE PERIOD. A SHORTWAVE ASSOCIATED WITH AN UPPER LOW OVER
MANITOBA WILL SWING JUST NORTH OF THE STATE TONIGHT...WITH ANOTHER
SET TO MOVE THROUGH ON FRIDAY. AFTER THAT...THE UPPER FLOW BECOMES
NORTHWESTERLY AND REMAIN THAT WAY THROUGH LATE SUNDAY.

AT THE SURFACE...A COLD FRONT EXTENDED FROM NEAR BRITTON TO GANN
VALLEY AT 20Z AND WAS PUSHING FAIRLY STEADILY EASTWARD. MAIN CONCERN
FOR CONVECTIVE CHANCES ALONG THE FRONT CENTER ON THE FACT THAT MUCH
OF THE EASTERN CWA WAS UNDER SOLID CLOUD COVER MOST OF THE DAY...BUT
SATELLITE NOW SHOWING AN AREA OF BREAKS IN THE CLOUDS JUST AHEAD OF
THE FRONT. THIS SHOULD HELP TO DESTABILIZE THAT AREA OVER THE NEXT
FEW HOURS...WITH THE POTENTIAL STILL THERE FOR STORMS TO DEVELOP.
12Z ETA RUN HAD A BIT LESS INSTABILITY FORECAST...WITH CAPES IN THE
1000-1500 J/KG RANGE. CURRENT LAPS DATA SHOWING A BIT MORE THAN
THAT...ESPECIALLY IN THE CLEARING AREA. WILL KEEP A CHANCE OF TRW
GOING IN THE FAR EASTERN CWA THROUGH ABOUT 06Z...THOUGH FEEL THAT
LACK OF HEATING TIME MAY HINDER CHANCES FOR SEVERE. HIGH PRESSURE
CENTERED OVER THE ROCKIES BEGINS TO NOSE OVER THE PLAINS ON
FRIDAY...THEN REMAINS THE DOMINANT FEATURE THROUGH SUNDAY NIGHT.
THEREFORE...WILL GO WITH A DRY FORECAST FROM FRIDAY THROUGH THE END
OF THE SHORT TERM.

NO BIG CHANGES MADE TO TEMPERATURES...AS H85 TEMPS REMAIN IN THE
TEENS TO LOWER 20S THROUGHOUT THE PERIOD. LOOKING FOR HIGHS TO BE IN
THE UPPER 70S TO MID 80S...WITH OVERNIGHT LOWS MAINLY IN THE 50S.

.LONG TERM...MONDAY THROUGH THURSDAY
EXTENDED LOOKS ON TRACK...BUT LATEST GFS/ECMWF/DGEX SHOW TUESDAY
INTO WEDNESDAY SHORTWAVE TAKING MORE OF A NORTHERLY TRACK.
THEREFORE HAVE REMOVED SOME OF THE PRECIP CHANCES FOR TUESDAY NIGHT
AND WEDNESDAY. MOST OF THE LIFT LOOKS TO STAY NORTH INTO NORTH
DAKOTA AND CANADA...WITH THE MAIN JET TRACK STAYING JUST NORTH OF
THE CWA. LARGER TROUGH TO PUSH INTO THE PACIFIC NORTHWEST AND
BRITISH COLUMBIA WEDNESDAY. AS A WEAK SHORTWAVE GETS SHOVED EAST
FROM THE MAIN UPPER TROUGH...COULD SEE A CHANCE FOR SOME PRECIP
WEDNESDAY NIGHT AND THURSDAY ACROSS THE EASTERN CWA. TEMPERATURES
LOOKED GOOD...WITH THE EXCEPTION OF WEDNESDAY NIGHT THURSDAY...WHEN
LOOKS LIKE GET SOME WAA AHEAD OF THAT NEXT SYSTEM. THEREFORE BUMPED
UP MIN TEMPS WED NIGHT. OTHERWISE CHANGES WERE MINIMAL.

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

PARKIN/ALBRECHT
Hazardous weather outlook, Aug 25, 5:53 AM CDT, 11 hours 38 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ABERDEEN SD
553 AM CDT THU AUG 25 2005

SDZ003>005-009-010-015>017-033>036-045-261100-
CORSON-CAMPBELL-MCPHERSON-WALWORTH-EDMUNDS-DEWEY-POTTER-FAULK-
STANLEY-SULLY-HUGHES-HYDE-JONES-
553 AM CDT THU AUG 25 2005 /453 AM MDT THU AUG 25 2005/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL SOUTH
DAKOTA AND NORTH CENTRAL SOUTH DAKOTA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS WILL BE POSSIBLE ACROSS THE AREA TODAY. THE MAIN
THREAT WILL BE LIGHTNING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SDZ006-007-011-018-019-037-048-051-261100-
BROWN-MARSHALL-DAY-SPINK-CLARK-HAND-LYMAN-BUFFALO-
553 AM CDT THU AUG 25 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST SOUTH
DAKOTA AND CENTRAL SOUTH DAKOTA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS WILL BE POSSIBLE ACROSS THE AREA TODAY...WITH THE
BEST CHANCE COMING THIS AFTERNOON. SEVERE THUNDERSTORMS ARE
POSSIBLE WITH THE MAIN THREATS BEING DAMAGING WINDS AND LARGE
HAIL. THE THREAT FOR THUNDERSTORMS WILL DECREASE QUICKLY DURING
THE EVENING HOURS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON OR EARLY THIS
EVENING.

MNZ039-046-SDZ008-020>023-261100-
TRAVERSE-BIG STONE-ROBERTS-CODINGTON-GRANT-HAMLIN-DEUEL-
553 AM CDT THU AUG 25 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST SOUTH
DAKOTA AND WEST CENTRAL MINNESOTA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS WILL BE POSSIBLE ACROSS THE AREA TODAY...WITH THE
BEST CHANCE COMING THIS AFTERNOON. SEVERE THUNDERSTORMS ARE
POSSIBLE WITH THE MAIN THREATS BEING DAMAGING WINDS...LARGE
HAIL...AND TORNADOES. THE THREAT FOR THUNDERSTORMS WILL CONTINUE
INTO THE EVENING HOURS...BUT IS EXPECTED TO END BY MIDNIGHT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON OR THIS EVENING.

KNUTSVIG

In the hours before

Special weather statement, Aug 25, 3:54 PM CDT, 1 hour 37 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
354 PM CDT THU AUG 25 2005

MNZ039-046-SDZ007>008-011-018>023-260400-
BIG STONE-TRAVERSE-CLARK-CODINGTON-DAY-DEUEL-GRANT-HAMLIN-
MARSHALL-ROBERTS-SPINK-
354 PM CDT THU AUG 25 2005

...THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
745 IN EFFECT UNTIL 11 PM CDT FOR THE FOLLOWING AREA...

IN MINNESOTA THIS WATCH INCLUDES 2 COUNTIES

IN WEST CENTRAL MINNESOTA

BIG STONE... TRAVERSE...

IN SOUTH DAKOTA THIS WATCH INCLUDES 9 COUNTIES

IN NORTHEAST SOUTH DAKOTA

CLARK... CODINGTON... DAY...
DEUEL... GRANT... HAMLIN...
MARSHALL... ROBERTS... SPINK...

THIS INCLUDES THE CITIES OF...BRITTON...CASTLEWOOD...CLARK...
CLEAR LAKE...MILBANK...ORTONVILLE...REDFIELD...SISSETON...
WATERTOWN...WEBSTER AND WHEATON.

PARKIN
Local storm report, Aug 25, 5:05 PM CDT, 26 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 25, 4:24 PM CDTSevere Thunderstorm WarningABRClark, Spink51 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2005Every severe thunderstorm warning in 2005

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.