Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 265, NWS Sioux Falls, SD

August 11, 2002Hanson County, Miner County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 11, 2002, 9:36 PM CDT for Hanson County, Miner County, South Dakota. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 11, 2002, 9:36 PM CDT (02:36 UTC)
Expired: Aug 11, 2002, 10:00 PM CDT
In force: 24 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

Counties Hanson County, SD, Miner County, SD

The radar

The Sioux Falls radar (KFSD), 87 km from the middle of the area, began a volume at 02:35 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 watch it was issued in

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

Issued	Product	Office	Lasted
Aug 11, 7:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 2.6 hours before the alert went out and 137 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: 2317 J/kg
Mixed-layer CIN: -146 J/kg
Mixed-layer LCL: 2063 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 92 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

481 
WUUS53 KFSD 120236
SVRFSD
SDC061-097-120300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
937 PM CDT SUN AUG 11 2002

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MINER COUNTY IN EAST CENTRAL SOUTH DAKOTA
  HANSON COUNTY IN SOUTHEAST SOUTH DAKOTA

* UNTIL 1000 PM CDT

* AT 937 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES WEST OF FULTON...OR ABOUT 4 MILES EAST
  OF MITCHELL...MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FULTON AROUND 945 PM CDT
  ALEXANDRIA AROUND 950 PM CDT
  FARMER...VILAS AROUND 955 PM CDT

THIS STORM WILL PRODUCE DAMAGING WIND. GO INSIDE A STURDY BUILDING
AND STAY AWAY FROM WINDOWS.

LAT...LON 4381 9787 4354 9794 4352 9765 4409 9758

BOUSTEAD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 7:58 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld	47 min
Aug 11, 8:10 PM CDT	Severe Thunderstorm Warning	FSD	Brule	50 min
Aug 11, 8:28 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	32 min
Aug 11, 8:47 PM CDT	Severe Thunderstorm Warning	FSD	Jerauld	43 min
Aug 11, 8:53 PM CDT	Severe Thunderstorm Warning	FSD	Aurora	37 min
Aug 11, 8:56 PM CDT	Severe Thunderstorm Warning	FSD	Sanborn	49 min
Aug 11, 9:00 PM CDT	Severe Thunderstorm Warning	FSD	Brule	15 min
Aug 11, 9:05 PM CDT	Severe Thunderstorm Warning	FSD	Beadle	25 min
Aug 11, 9:30 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison	30 min
Aug 11, 10:00 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Douglas	30 min
Aug 11, 10:14 PM CDT	Severe Thunderstorm Warning	FSD	Hutchinson	46 min
Aug 11, 10:22 PM CDT	Severe Thunderstorm Warning	FSD	Hanson	53 min
Aug 11, 10:49 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Minnehaha	26 min
Aug 11, 11:17 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Minnehaha	43 min
Aug 12, 12:46 AM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Minnehaha	44 min
Aug 12, 12:53 AM CDT	Severe Thunderstorm Warning	FSD	Clay	37 min
Aug 12, 1:18 AM CDT	Severe Thunderstorm Warning	FSD	Lincoln	42 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.