Alert archive / South Dakota / Tornado Warnings in 2003

Tornado Warning 1, NWS Sioux Falls, SD

June 9, 2003Gregory County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jun 9, 2003, 7:32 PM CDT for Gregory County, South Dakota. It was in force for 28 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: Jun 9, 2003, 7:32 PM CDT (00:32 UTC)
Expired: Jun 9, 2003, 8:00 PM CDT
In force: 28 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

County Gregory County, SD

The radar

The North Platte radar (KLNX), 171 km from the middle of the area, began a volume at 00:31 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
Jun 9, 2:55 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.5 hours before the alert went out and 203 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: 39 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 1765 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 97 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.

576 
WFUS53 KFSD 100032
TORFSD
SDC053-100100-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
731 PM CDT MON JUN 9 2003

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWEST GREGORY COUNTY IN SOUTH CENTRAL SOUTH DAKOTA

* UNTIL 800 PM CDT

* AT 731 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADIC THUNDERSTORM 7 MILES WEST OF GREGORY...MOVING SOUTHEAST AT
  35 MPH.

* SOME LOCATIONS AFFECTED...
  GREGORY AROUND 740 PM CDT
  BURKE AROUND 750 PM CDT

AT 715 PM WEATHER SPOTTERS REPORTED A TORNADO WITH THIS STORM IN 
TRIPP COUNTY. 

IF YOU ARE IN THE PATH OF THIS STORM...TAKE COVER IMMEDIATELY.

IF YOU ARE CAUGHT OUTSIDE...FIND SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT.

LAT...LON 4337 9954 4302 9952 4301 9913 4328 9913

$$

BOUSTEAD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 7:07 PM CDT	Severe Thunderstorm Warning	FSD	Sanborn	38 min
Jun 9, 7:47 PM CDT	Severe Thunderstorm Warning	FSD	Sanborn	43 min
Jun 9, 8:00 PM CDT	Tornado Warning	FSD	Gregory	30 min
Jun 9, 8:18 PM CDT	Severe Thunderstorm Warning	FSD	Miner	42 min
Jun 9, 8:39 PM CDT	Severe Thunderstorm Warning	FSD	Hanson	36 min
Jun 9, 8:42 PM CDT	Severe Thunderstorm Warning	FSD	McCook	63 min
Jun 9, 9:25 PM CDT	Severe Thunderstorm Warning	FSD	Hutchinson, Turner	35 min
Jun 9, 10:00 PM CDT	Severe Thunderstorm Warning	FSD	Turner	45 min

Nearby

Tornado Warnings in South Dakota, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.