Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 293, NWS Sioux Falls, SD

August 16, 2002Clay County, South Dakota; Dixon County, Nebraska

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 16, 2002, 11:42 AM CDT for Clay County, South Dakota; Dixon County, Nebraska. It was in force for 33 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 16, 2002, 11:42 AM CDT (16:42 UTC)
Expired: Aug 16, 2002, 12:15 PM CDT
In force: 33 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

Counties Dixon County, NE, Clay County, SD

The radar

The Sioux Falls radar (KFSD), 90 km from the middle of the area, began a volume at 16:42 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
Aug 16, 11:55 AM CDT	Hail 1	Vermillion, 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

Omaha, NE (KOAX), launched 12:00Z, 4.7 hours before the alert went out and 174 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: 2380 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 189 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

983 
WUUS53 KFSD 161642
SVRFSD
NEC051-SDC027-161715-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1141 AM CDT FRI AUG 16 2002

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN DIXON COUNTY IN NORTHEAST NEBRASKA
  SOUTHERN CLAY COUNTY IN SOUTHEAST SOUTH DAKOTA

* UNTIL 1215 PM CDT

* AT 1141 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES SOUTH OF MECKLING...OR ABOUT 9 MILES
  WEST OF VERMILLION...MOVING EAST AT 45 MPH.

* THE STORM WILL REMAIN OVER RURAL AREAS OF NORTHERN DIXON AND   
  SOUTHERN CLAY COUNTIES.

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS.

LAT...LON 4291 9715 4268 9717 4263 9681 4290 9684

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 10:56 AM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Douglas, Hutchinson	34 min
Aug 16, 11:24 AM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Hutchinson, Yankton	36 min
Aug 16, 11:58 AM CDT	Severe Thunderstorm Warning	FSD	Turner, Yankton	32 min
Aug 16, 12:25 PM CDT	Severe Thunderstorm Warning	FSD	Clay	35 min
Aug 16, 12:44 PM CDT	Severe Thunderstorm Warning	FSD	Union	31 min
Aug 16, 1:19 PM CDT	Severe Thunderstorm Warning	FSD	Union	41 min
Aug 16, 1:36 PM CDT	Severe Thunderstorm Warning	FSD	Clay	14 min
Aug 16, 1:37 PM CDT	Severe Thunderstorm Warning	FSD	Clay	13 min
Aug 16, 2:01 PM CDT	Severe Thunderstorm Warning	FSD	Union	29 min
Aug 16, 2:30 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Union	30 min
Aug 16, 3:13 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Minnehaha	32 min
Aug 16, 6:06 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme	39 min
Aug 16, 6:30 PM CDT	Severe Thunderstorm Warning	FSD	Yankton	45 min
Aug 16, 6:44 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme	31 min
Aug 16, 12:08 PM CDT	Severe Thunderstorm Warning	FSD	Dixon	37 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2002 Severe Thunderstorm Warnings in Nebraska, 2002 Every severe thunderstorm warning in 2002

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.