Alert archive / South Dakota / Tornado Warnings in 2009

Tornado Warning 22, NWS Sioux Falls, SD

June 16, 2009Bon Homme County, Clay County, Yankton County, South Dakota; Dixon County, Nebraska

NWS Sioux Falls, SD issued this tornado warning at Jun 16, 2009, 9:05 PM CDT for Bon Homme County, Clay County, Yankton County, South Dakota; Dixon County, Nebraska. It was in force for 25 min. 4 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: Jun 16, 2009, 9:05 PM CDT (02:05 UTC)
Expired: Jun 16, 2009, 9:30 PM CDT
In force: 25 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon

Counties Dixon County, NE, Bon Homme County, SD, Clay County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 92 km from the middle of the area, began a volume at 02:09 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
Jun 16, 9:30 PM CDT	TSTM WND GST 60	7 N Vermillion, SD
Jun 16, 9:35 PM CDT	TSTM WND GST 65	1 Nnw Vermillion, SD	IN ADDITION TO ESTIMATED 65 MPH WIND GUSTS, CONSTRUCTION SIGNS WERE BLOWN OVER ON THE EAST SIDE OF VERMILLION.
Jun 16, 9:37 PM CDT	HAIL 0.75	1 Nnw Vermillion, SD
Jun 16, 9:40 PM CDT	TSTM WND GST 60	Vermillion, 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
Jun 16, 4:16 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 2.1 hours before the alert went out and 183 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: 264 J/kg
Mixed-layer CIN: -115 J/kg
Mixed-layer LCL: 1545 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KFSD 170205
TORFSD
NEC051-SDC009-027-135-170230-
/O.NEW.KFSD.TO.W.0022.090617T0205Z-090617T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
905 PM CDT TUE JUN 16 2009

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  EXTREME NORTHWESTERN DIXON COUNTY IN NORTHEAST NEBRASKA
  EASTERN BON HOMME COUNTY IN SOUTHEAST SOUTH DAKOTA
  CLAY COUNTY IN SOUTHEAST SOUTH DAKOTA
  SOUTHERN YANKTON COUNTY IN SOUTHEAST SOUTH DAKOTA

* UNTIL 930 PM CDT

* AT 900 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING A TORNADO. THESE
  DANGEROUS STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 7 MILES
  SOUTHEAST OF WAKONDA TO MISSION HILL TO UTICA...AND MOVING
  SOUTHEAST AT 20 MPH.

* THESE TORNADIC STORMS WILL BE NEAR...
   YANKTON AROUND 910 PM CDT...
   LEWIS AND CLARK STATE PARK AROUND 915 PM CDT...
   MECKLING AROUND 920 PM CDT...
   VERMILLION AROUND 930 PM CDT...

THIS TORNADO WARNING IS AN UPGRADE TO THE SEVERE THUNDERSTORM WARNING
PREVIOUSLY ISSUED FOR THE WARNED AREA.

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES SEVERAL AREAS OF 
CIRCULATION ALONG THE LEADING EDGE THAT ARE CAPABLE OF PRODUCING A 
TORNADO. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.

TORNADOES ARE DIFFICULT TO SEE AT NIGHT...SO DO NOT WAIT. TAKE COVER
NOW

&&

LAT...LON 4275 9702 4277 9713 4282 9723 4285 9724
      4286 9741 4284 9746 4286 9754 4304 9771
      4296 9733 4303 9694 4274 9682 4269 9703
TIME...MOT...LOC 0204Z 326DEG 16KT 4293 9699 4288 9725
          4294 9752

$$

2 follow-up statements

000 
WWUS53 KFSD 170210
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
910 PM CDT TUE JUN 16 2009

NEC051-SDC009-027-135-170230-
/O.CON.KFSD.TO.W.0022.000000T0000Z-090617T0230Z/
DIXON NE-YANKTON SD-BON HOMME SD-CLAY SD-
910 PM CDT TUE JUN 16 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR CLAY...
EASTERN BON HOMME...SOUTHERN YANKTON AND EXTREME NORTHWESTERN DIXON
COUNTIES...

AT 905 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF TORNADO PRODUCING STORMS. THESE TORNADO PRODUCING
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 7 MILES NORTHEAST OF
MECKLING TO MISSION HILL TO UTICA...MOVING SOUTHEAST AT 20 MPH.

TORNADO PRODUCING STORMS WILL BE NEAR...
LEWIS AND CLARK STATE PARK AROUND 915 PM CDT...
MECKLING AROUND 920 PM CDT...
VERMILLION AROUND 930 PM CDT...

AT 902 PM...A TRAINED WEATHER SPOTTER REPORTED QUARTER SIZED HAIL 
AND 40 TO 60 MPH ONE MILE NORTH OF UTICA.

NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINES TO INDICATE SEVERAL 
CIRCULATIONS ALONG THE LEADING EDGE OF THIS STORM.  THE STRONGEST 
CIRCULATIONS ARE ALONG THE WESTERN EDGE OF THIS TROM NEAR YANKTON.  
IF YOU ARE IN THE PATH OF THIS LIFE THREATENING STORM...SEEK SHELTER 
IMMEDIATELY  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
GOLFBALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

TORNADOES ARE DIFFICULT TO SEE AT NIGHT...SO DO NOT WAIT. TAKE COVER
NOW

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT TUESDAY EVENING
FOR NORTHWEST IOWA AND NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA.

&&

LAT...LON 4275 9702 4277 9713 4282 9723 4285 9724
      4286 9741 4284 9746 4286 9754 4304 9771
      4296 9733 4303 9694 4274 9682 4269 9703
TIME...MOT...LOC 0207Z 326DEG 16KT 4292 9698 4287 9724
          4293 9751

$$


BT

000 
WWUS53 KFSD 170220
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
920 PM CDT TUE JUN 16 2009

NEC051-SDC009-027-135-170230-
/O.CON.KFSD.TO.W.0022.000000T0000Z-090617T0230Z/
DIXON NE-YANKTON SD-BON HOMME SD-CLAY SD-
920 PM CDT TUE JUN 16 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR CLAY...
EASTERN BON HOMME...SOUTHERN YANKTON AND EXTREME NORTHWESTERN DIXON
COUNTIES...

AT 919 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF TORNADO PRODUCING STORMS. THESE TORNADO PRODUCING
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 7 MILES NORTH OF
VERMILLION TO GAYVILLE TO LEWIS AND CLARK STATE PARK...MOVING
SOUTHEAST AT 20 MPH.

TORNADO PRODUCING STORMS WILL BE NEAR...
VERMILLION AROUND 930 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
QUARTER SIZE 
HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUES TO INDICATE AREAS 
OF CIRUCLATION ALONG THE LEADING EDGE OF THE STORM. 

TORNADOES ARE DIFFICULT TO SEE AT NIGHT...SO DO NOT WAIT. TAKE COVER
NOW

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT TUESDAY EVENING
FOR NORTHWEST IOWA AND NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA.

&&

LAT...LON 4275 9702 4277 9713 4282 9723 4285 9724
      4286 9741 4284 9746 4286 9754 4304 9771
      4296 9733 4303 9694 4274 9682 4269 9703
TIME...MOT...LOC 0219Z 326DEG 16KT 4288 9694 4283 9720
          4289 9747

$$

BT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 7:12 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Hutchinson, McCook	48 min
Jun 16, 7:39 PM CDT	Tornado Warning	FSD	Hutchinson, Turner, Yankton	36 min
Jun 16, 8:10 PM CDT	Tornado Warning	FSD	Bon Homme, Clay, Hutchinson, Turner, Yankton	35 min
Jun 16, 8:36 PM CDT	Tornado Warning	FSD	Bon Homme, Clay, Turner, Yankton	24 min
Jun 16, 8:58 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Clay, Yankton	32 min
Jun 16, 9:27 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Union, Yankton	48 min
Jun 16, 9:55 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Union	50 min
Jun 16, 10:47 PM CDT	Severe Thunderstorm Warning	FSD	Union	43 min
Jun 17, 3:59 AM CDT	Dense Fog Advisory	FSD	Lake, Lincoln, Minnehaha, Moody	5 hr
Jun 17, 5:43 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	47 min
Jun 17, 5:54 PM CDT	Tornado Warning	FSD	Gregory	36 min
Jun 17, 6:31 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	44 min

Nearby

Tornado Warnings in South Dakota, 2009 Tornado Warnings in Nebraska, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.