Alert archive / South Dakota / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 103, NWS Aberdeen, SD

July 17, 1996Corson County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 17, 1996, 3:04 PM MDT for Corson County, South Dakota. It was in force for 46 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: Jul 17, 1996, 3:04 PM MDT (21:04 UTC)
Expired: Jul 17, 1996, 3:50 PM MDT
In force: 46 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Corson County, SD

The radar

The Bismarck radar (KBIS), 123 km from the middle of the area, began a volume at 21:04 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
Jul 17, 3:10 PM MDT	Hail 0.75	Glad Valley, 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 nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 9.1 hours before the alert went out and 124 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: 163 J/kg
Mixed-layer CIN: -333 J/kg
Mixed-layer LCL: 1086 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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.

In the hours before

Special weather statement, Jul 17, 9:34 AM MDT, 5 hours 30 minutes before

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Special weather statement, Jul 17, 2:42 PM MDT, 22 minutes before

SDZ003>005-009-010-015>017-033>037-045-048-051-180250-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
343 PM CDT (243 PM MDT) WED JUL 17 1996

...TORNADO WATCH IN EFFECT FOR CENTRAL AND PARTS OF NORTHEAST SOUTH
DAKOTA UNTIL 10 PM CDT...

A TORNADO WATCH IS IN EFFECT FOR MUCH OF CENTRAL AND PARTS OF
NORTHEAST SOUTH DAKOTA.  THIS MEANS THAT SEVERE THUNDERSTORMS AND
EVEN TORNADOES WILL BE A POSSIBILITY IN THE WATCH AREA THROUGH 10
PM.  THE WATCH AREA GENERALLY STRETCHES OVER AN AREA FROM MOBRIDGE
SOUTH TO PIERRE AND EAST TO JUST WEST OF BROWN AND SPINK COUNTY.

EVEN YOU ARE IN THE WATCH AREA PLEASE STAY CLOSE TO A RADIO OR TV IN
CASE WARNINGS ARE ISSUED.

TDK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 1:17 AM MDT	Severe Thunderstorm Warning	ABR	Stanley	63 min
Jul 17, 3:32 PM MDT	Severe Thunderstorm Warning	ABR	Dewey	48 min
Jul 17, 5:46 PM MDT	Severe Thunderstorm Warning	ABR	Brown	49 min
Jul 17, 5:52 PM MDT	Tornado Warning	ABR	Brown	48 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1996 Every severe thunderstorm warning in 1996

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.