Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 33, NWS Sioux Falls, SD

May 5, 2002McCook County, Minnehaha County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 5, 2002, 6:02 PM CDT for McCook County, Minnehaha County, South Dakota. It was in force for 43 min. 10 reports 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: May 5, 2002, 6:02 PM CDT (23:02 UTC)
Expired: May 5, 2002, 6:45 PM CDT
In force: 43 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

Counties McCook County, SD, Minnehaha County, SD

The radar

The Sioux Falls radar (KFSD), 27 km from the middle of the area, began a volume at 23:05 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
May 5, 6:10 PM CDT	Hail 1.75	Canistota, SD
May 5, 6:12 PM CDT	Hail 0.75	Humboldt, SD
May 5, 6:21 PM CDT	Hail 0.75	Hartford, SD
May 5, 6:23 PM CDT	Hail 1	Hartford, SD
May 5, 6:28 PM CDT	Hail 1.25	Hartford, SD
May 5, 6:30 PM CDT	Hail 1.75	Hartford, SD
May 5, 6:35 PM CDT	Hail 1	Crooks, SD
May 5, 6:36 PM CDT	Hail 0.75	(Fsd)Joe Foss Fld Si, SD
May 5, 6:36 PM CDT	Hail 0.75	Renner, SD
May 5, 6:36 PM CDT	Hail 0.75	(Fsd)Joe Foss Fld Si, 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

Aberdeen, SD (KABR), launched 12:00Z, 11.0 hours before the alert went out and 180 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: 1795 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 323 m²/s²
0-3 km storm-relative helicity: 472 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.

000 
WUUS53 KFSD 052302
SVRFSD
SDC087-099-052345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
602 PM CDT SUN MAY 5 2002

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN MCCOOK COUNTY IN SOUTHEAST SOUTH DAKOTA
  MINNEHAHA COUNTY IN SOUTHEAST SOUTH DAKOTA

* UNTIL 645 PM CDT

* AT 602 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES SOUTHEAST OF CANISTOTA...OR ABOUT 9
  MILES NORTH OF MARION...MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HUMBOLDT AROUND 610 PM CDT
  HARTFORD AROUND 620 PM CDT
  CROOKS AROUND 635 PM CDT
  SIOUX FALLS AROUND 640 PM CDT

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

LAT...LON 4364 9733 4352 9730 4352 9668 4369 9665

The office that day

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

Issued	Product	Office	Counties	Lasted
May 5, 5:29 PM CDT	Severe Thunderstorm Warning	FSD	McCook	31 min
May 5, 5:37 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix	38 min
May 5, 5:40 PM CDT	Severe Thunderstorm Warning	FSD	Brookings	35 min
May 5, 6:24 PM CDT	Severe Thunderstorm Warning	FSD	Lake, Moody	36 min
May 5, 6:45 PM CDT	Severe Thunderstorm Warning	FSD	Minnehaha	30 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 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.