Alert archive / South Dakota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 128, NWS Aberdeen, SD

July 2, 2007Brown County, Day County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 2, 2007, 4:16 AM CDT for Brown County, Day County, South Dakota. It was in force for 29 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: Jul 2, 2007, 4:16 AM CDT (09:16 UTC)
Expired: Jul 2, 2007, 4:45 AM CDT
In force: 29 min
Issued by: NWS Aberdeen, SD
Area: Counties, with a storm outline in the text

Counties Brown County, SD, Day County, SD

The radar

The Aberdeen radar (KABR), 34 km from the middle of the area, began a volume at 09:16 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

Bismarck Municip, ND (KBIS), launched 00:00Z, 9.3 hours before the alert went out and 254 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: 2388 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1263 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 5.6

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 Jul 2, 4:16 AM CDT, 0 minutes earlier.

Area forecast discussion, Jul 2, 4:16 AM CDT, 0 minutes before

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Hazardous weather outlook, Jul 1, 5:06 AM CDT, 23 hours 10 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ABERDEEN SD
506 AM CDT SUN JUL 1 2007

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-021015-
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-
506 AM CDT SUN JUL 1 2007 /406 AM MDT SUN JUL 1 2007/

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

THUNDERSTORMS MAY SKIRT THE FAR NORTHEAST CORNER OF SOUTH
DAKOTA...INCLUDING WEST CENTRAL MINNESOTA...LATE TONIGHT...MAINLY
ALONG AND NORTH OF A LINE FROM MCLAUGHLIN TO MILBANK. SEVERE
THUNDERSTORMS ARE NOT ANTICIPATED TODAY OR TONIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

BY MONDAY EVENING...MORE THUNDERSTORMS MAY DEVELOP ALONG A
COLD FRONT SLIPPING SOUTHWARD ACROSS CENTRAL SOUTH DAKOTA
STRETCHING EASTWARD INTO EAST CENTRAL SOUTH DAKOTA MONDAY NIGHT.
THUNDERSTORMS WOULD LIKELY DEVELOP JUST NORTH AND WEST OF THIS
FORECAST AREA AFTER 7 PM CDT MONDAY EVENING...AND MOVE SOUTH AND
EAST INTO THIS FORECAST AREA. LARGE HAIL...DAMAGING WINDS AND AN
ISOLATED TORNADO ARE THE THREATS ASSOCIATED WITH THUNDERSTORMS
THAT DEVELOP MONDAY EVENING AND MONDAY NIGHT.

A SECONDARY COLD FRONTAL BOUNDARY WILL SWEEP THROUGH THE FORECAST
AREA TUESDAY EVENING AND NIGHT...ONCE AGAIN...INTRODUCING THE
POTENTIAL FOR A FEW THUNDERSTORMS TO DEVELOP...WITH LARGE HAIL
BEING THE MAIN THREAT TUESDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT.

DORN

In the hours before

Local storm report, Jul 2, 12:01 AM CDT, 4 hours 15 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE ABERDEEN SD
1201 AM CDT MON JUL 02 2007

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

0638 PM     HAIL             MCINTOSH                45.92N 101.35W
07/01/2007  E0.88 INCH       CORSON             SD   TRAINED SPOTTER

0640 PM     TSTM WND GST     5 N ISABEL              45.47N 101.43W
07/01/2007  E70.00 MPH       DEWEY              SD   TRAINED SPOTTER

0651 PM     HAIL             9 N ISABEL              45.53N 101.43W
07/01/2007  E1.00 INCH       CORSON             SD   PUBLIC

0720 PM     HAIL             4 SE FIRESTEEL          45.38N 101.23W
07/01/2007  E0.75 INCH       DEWEY              SD   PUBLIC

&&

WFOABR

Local storm report, Jul 2, 3:56 AM CDT, 20 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
Jul 1, 7:14 PM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	33 min
Jul 2, 3:23 AM CDT	Severe Thunderstorm Warning	ABR	Brown	52 min
Jul 2, 4:48 AM CDT	Severe Thunderstorm Warning	ABR	Day	27 min
Jul 2, 5:17 AM CDT	Severe Thunderstorm Warning	ABR	Day	32 min
Jul 2, 5:36 AM CDT	Severe Thunderstorm Warning	ABR	Marshall	25 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2007 Every severe thunderstorm warning in 2007

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.