Alert archive / South Dakota / Tornado Warnings in 2006

Tornado Warning 8, NWS Sioux Falls, SD

May 2, 2006Brookings County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at May 2, 2006, 6:35 PM CDT for Brookings County, South Dakota. It was in force for 17 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: May 2, 2006, 6:35 PM CDT (23:35 UTC)
Expired: May 2, 2006, 6:52 PM CDT
In force: 17 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

County Brookings County, SD

The radar

The Sioux Falls radar (KFSD), 99 km from the middle of the area, began a volume at 23:38 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
May 2, 6:45 PM CDT	HAIL 0.75	5 Ene Badger, SD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
May 2, 3:06 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.6 hours before the alert went out and 122 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: 1725 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 63 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 
WFUS53 KFSD 022337
TORFSD
SDC011-030000-
/O.NEW.KFSD.TO.W.0008.060502T2335Z-060503T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
635 PM CDT TUE MAY 2 2006

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWEST BROOKINGS COUNTY IN EAST CENTRAL SOUTH DAKOTA

* UNTIL 700 PM CDT

* AT 635 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 16 MILES WEST OF
  BRUCE...OR ABOUT 16 MILES WEST OF ESTELLINE...MOVING EAST AT 20    
  MPH. A SECOND STORM CAPABLE OF PRODUCING A TORNADO WAS LOCATED 6   
  MILES SOUTH OF BADGER...ALSO MOVING EAST A 20 MPH.  

* THE TORNADO WILL BE NEAR...
   BRUCE AROUND 700 PM CDT...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT TUESDAY EVENING
FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND NORTHEAST NEBRASKA AND
SOUTHEASTERN SOUTH DAKOTA.

LAT...LON 4442 9703 4443 9705 4443 9712 4454 9712
      4454 9680 4442 9680

$$

LIEBL

1 follow-up statement

000 
WWUS53 KFSD 022352
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
652 PM CDT TUE MAY 2 2006

SDC011-030002-
/O.CAN.KFSD.TO.W.0008.000000T0000Z-060503T0000Z/
BROOKINGS SD-
652 PM CDT TUE MAY 2 2006

...THE TORNADO WARNING FOR BROOKINGS COUNTY IS CANCELLED...

THE STORM HAS WEAKENED AND IS NO LONGER SEVERE.

LAT...LON 4442 9703 4443 9705 4443 9712 4454 9712
      4454 9680 4442 9680

$$

LIEBL

The office that day

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

Issued	Product	Office	Counties	Lasted
May 2, 4:20 PM CDT	Severe Thunderstorm Warning	FSD	Clay	25 min
May 2, 4:35 PM CDT	Severe Thunderstorm Warning	FSD	Union	25 min
May 2, 4:59 PM CDT	Severe Thunderstorm Warning	FSD	Union	31 min
May 2, 6:20 PM CDT	Tornado Warning	FSD	Kingsbury	25 min
May 2, 6:41 PM CDT	Tornado Warning	FSD	Kingsbury	8 min

Nearby

Tornado Warnings in South Dakota, 2006 Every tornado warning in 2006 Tornadoes in 2006

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.