Alert archive / South Dakota / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 65, NWS Aberdeen, SD

June 9, 1999Codington County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jun 9, 1999, 12:55 AM CDT for Codington County, South Dakota. It was in force for 65 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 9, 1999, 12:55 AM CDT (05:55 UTC)
Expired: Jun 9, 1999, 2:00 AM CDT
In force: 65 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Codington County, SD

The radar

The Aberdeen radar (KABR), 110 km from the middle of the area, began a volume at 05:56 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.

What was reported inside it

Time	Report	Where	Remark
Jun 9, 1:05 AM CDT	Hail 1	Waverly, SD

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 8, 11:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 5.9 hours before the alert went out and 96 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: 3880 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1393 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Jun 8, 9:45 PM CDT, 3 hours 10 minutes earlier.

Area forecast discussion, Jun 8, 9:45 PM CDT, 3 hours 10 minutes before

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In the hours before

Local storm report, Jun 8, 8:03 PM CDT, 4 hours 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  ABERDEEN SD
803 PM CDT TUE JUN 8 1999

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0757 PM    6 S MCINTOSH              SD   TORNADO
06/08/99   CORSON                         REPORTED BY LAW
                                          ENFORCEMENT

HARDING

Special weather statement, Jun 8, 8:10 PM CDT, 4 hours 45 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE  ABERDEEN SD
810 PM CDT TUE JUN 8 1999

SDZ003>005-009-010-015>017-033>036-045-048-090600-
CAMPBELL-CORSON-DEWEY-EDMUNDS-FAULK-HUGHES-HYDE-JONES-LYMAN-
MCPHERSON-POTTER-STANLEY-SULLY-WALWORTH-
INCLUDING THE CITIES OF EUREKA...FAULKTON...FT PIERRE...GETTYSBURG...
HIGHMORE...MCINTOSH...MOBRIDGE...MOUND CITY...MURDO...ONIDA...PIERRE...
PRESHO...ROSCOE...TIMBER LAKE

...TORNADO WATCH UNTIL 2 AM CDT/1 AM MDT...

A TORNADO WATCH IS IN EFFECT FOR CENTRAL AND NORTH CENTRAL SOUTH
DAKOTA THROUGH 2 AM CDT/1 AM MDT. SOME COMMUNITIES INCLUDED IN THIS
TORNADO WATCH ARE HIGHMORE...TIMBER LAKE...FAULKTON...MOBRIDGE...
PIERRE...MURDO...GETTYSBURG...KENNEBEC...MOUND CITY AND IPSWICH.

THUNDERSTORMS SHOULD CONTINUE TO DEVELOP ACROSS THE AREA THROUGH THE
EARLY MORNING HOURS. SOME OF THE STORMS COULD PRODUCE LARGE HAIL...
DAMAGING WINDS...AND POSSIBLE TORNADOES.

STAY TUNED TO YOUR FAVORITE LISTENING SOURCE FOR THE LATEST
STATEMENTS AND WARNINGS.

MOHR

Local storm report, Jun 8, 9:40 PM CDT, 3 hours 15 minutes before

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Special weather statement, Jun 8, 11:15 PM CDT, 1 hour 40 minutes before

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Local storm report, Jun 8, 11:37 PM CDT, 1 hour 18 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 8, 7:30 PM CDT	Severe Thunderstorm Warning	ABR	Corson	50 min
Jun 8, 7:54 PM CDT	Tornado Warning	ABR	Corson	66 min
Jun 8, 9:33 PM CDT	Tornado Warning	ABR	Corson	32 min
Jun 8, 10:56 PM CDT	Severe Thunderstorm Warning	ABR	Clark	64 min
Jun 8, 11:35 PM CDT	Severe Thunderstorm Warning	ABR	Hamlin	50 min
Jun 8, 11:45 PM CDT	Severe Thunderstorm Warning	ABR	Spink	50 min
Jun 8, 11:58 PM CDT	Severe Thunderstorm Warning	ABR	Clark	62 min
Jun 9, 12:24 AM CDT	Severe Thunderstorm Warning	ABR	Brown	66 min
Jun 9, 12:57 AM CDT	Severe Thunderstorm Warning	ABR	Deuel	63 min
Jun 9, 1:03 AM CDT	Severe Thunderstorm Warning	ABR	Grant	62 min
Jun 9, 2:05 AM CDT	Severe Thunderstorm Warning	ABR	Grant	50 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1999 Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.