Alert archive / South Dakota / Tornado Warnings in 2009

Tornado Warning 40, NWS Sioux Falls, SD

July 7, 2009Brookings County, Kingsbury County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jul 7, 2009, 3:43 PM CDT for Brookings County, Kingsbury County, South Dakota. It was in force for 32 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: Jul 7, 2009, 3:43 PM CDT (20:43 UTC)
Expired: Jul 7, 2009, 4:15 PM CDT
In force: 32 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon

Counties Brookings County, SD, Kingsbury County, SD

The radar

The Sioux Falls radar (KFSD), 104 km from the middle of the area, began a volume at 20:46 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
Jul 7, 3:58 PM CDT	TSTM WND GST 60	3 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
Jul 7, 2:13 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 8.7 hours before the alert went out and 110 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: 224 J/kg
Mixed-layer CIN: -184 J/kg
Mixed-layer LCL: 1260 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KFSD 072043
TORFSD
SDC011-077-072115-
/O.NEW.KFSD.TO.W.0040.090707T2043Z-090707T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
343 PM CDT TUE JUL 7 2009

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN BROOKINGS COUNTY IN EAST CENTRAL SOUTH DAKOTA
  NORTHEASTERN KINGSBURY COUNTY IN EAST CENTRAL SOUTH DAKOTA

* UNTIL 415 PM CDT

* AT 343 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 5 MILES WEST OF BADGER...OR 21 MILES WEST OF
  ESTELLINE...AND MOVING SOUTHEAST AT 20 MPH.

* THIS TORNADIC STORM WILL BE NEAR...
   BADGER AROUND 355 PM CDT...
   HETLAND AROUND 405 PM CDT...
   ARLINGTON AROUND 415 PM CDT...

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.

IN ADDITION TO THE TORNADO...THIS STORM IS EXPECTED TO PRODUCE 
GOLFBALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS IN EXCESS OF 
70 MPH WELL AWAY FROM THE STORM CENTER.

&&

LAT...LON 4449 9691 4429 9704 4446 9749 4455 9743
      4455 9711
TIME...MOT...LOC 2043Z 295DEG 19KT 4450 9732

$$

BT

2 follow-up statements

000 
WWUS53 KFSD 072058
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
358 PM CDT TUE JUL 7 2009

SDC011-077-072115-
/O.CON.KFSD.TO.W.0040.000000T0000Z-090707T2115Z/
KINGSBURY SD-BROOKINGS SD-
358 PM CDT TUE JUL 7 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM CDT FOR 
NORTHWESTERN BROOKINGS AND NORTHEASTERN KINGSBURY COUNTIES...

AT 358 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR BADGER...OR 13
MILES SOUTHWEST OF ESTELLINE...MOVING EAST AT 30 MPH.

THE TORNADO WILL BE NEAR...
  RURAL NORTHWESTERN BROOKINGS COUNTY THROUGH 410 PM CDT

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A SEVERE THUNDERSTORM 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 4449 9691 4429 9704 4446 9749 4455 9743
      4455 9711
TIME...MOT...LOC 2058Z 275DEG 24KT 4448 9712

$$

BT

000 
WWUS53 KFSD 072101
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
401 PM CDT TUE JUL 7 2009

SDC011-077-072115-
/O.CON.KFSD.TO.W.0040.000000T0000Z-090707T2115Z/
KINGSBURY SD-BROOKINGS SD-
401 PM CDT TUE JUL 7 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM CDT FOR
NORTHWESTERN BROOKINGS AND NORTHEASTERN KINGSBURY COUNTIES...

AT 359 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR BADGER...OR 13
MILES SOUTHWEST OF ESTELLINE...MOVING EAST AT 30 MPH.

AT 358 PM...A TRAINED WEATHER SPOTTER REPORTED 60 MPH WINDS THREE 
MILES NORTHEAST OF BADGER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A SEVERE THUNDERSTORM 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 4449 9691 4429 9704 4446 9749 4455 9743
      4455 9711
TIME...MOT...LOC 2101Z 275DEG 24KT 4448 9709

$$

BT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 3:23 PM CDT	Severe Thunderstorm Warning	FSD	Kingsbury	52 min
Jul 7, 4:09 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Kingsbury, Lake, Miner, Moody	51 min
Jul 7, 5:23 PM CDT	Severe Thunderstorm Warning	FSD	Kingsbury, Lake	37 min
Jul 7, 5:58 PM CDT	Severe Thunderstorm Warning	FSD	Lake, Minnehaha, Moody	47 min
Jul 7, 6:50 PM CDT	Severe Thunderstorm Warning	FSD	McCook, Minnehaha	40 min

Nearby

Tornado Warnings in South Dakota, 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.