Alert archive / South Dakota / Tornado Warnings in 2009
Tornado Warning 24, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Jun 18, 2009, 8:46 PM CDT for 4 counties in South Dakota. It was in force for 44 min. 3 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 18, 2009, 8:46 PM CDT (01:46 UTC)
- Expired
- Jun 18, 2009, 9:30 PM CDT
- In force
- 44 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
Counties Brookings County, SD, Kingsbury County, SD, Lake County, SD, Miner County, SD
The radar
The Sioux Falls radar (KFSD), 82 km from the middle of the area, began a volume at 01:49 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 18, 8:54 PM CDT | HAIL 2 | 3 Sw Oldham, SD | |
| Jun 18, 9:00 PM CDT | HAIL 0.75 | 3 Ene Oldham, SD | |
| Jun 18, 9:11 PM CDT | TORNADO | 12 S Arlington, SD | POSSIBLE BRIEF TOUCHDOWN OF TORNADO. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 1.8 hours before the alert went out and 118 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.
- Mixed-layer CAPE
- 350 J/kg
- Mixed-layer CIN
- -210 J/kg
- Mixed-layer LCL
- 1163 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 185 m²/s²
- 0-3 km storm-relative helicity
- 282 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KFSD 190146 TORFSD SDC011-077-079-097-190230- /O.NEW.KFSD.TO.W.0024.090619T0146Z-090619T0230Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 846 PM CDT THU JUN 18 2009 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... SOUTHWESTERN BROOKINGS COUNTY IN EAST CENTRAL SOUTH DAKOTA SOUTHEASTERN KINGSBURY COUNTY IN EAST CENTRAL SOUTH DAKOTA NORTHWESTERN LAKE COUNTY IN EAST CENTRAL SOUTH DAKOTA NORTHEASTERN MINER COUNTY IN EAST CENTRAL SOUTH DAKOTA * UNTIL 930 PM CDT * AT 846 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 8 MILES WEST OF OLDHAM...OR 21 MILES NORTHWEST OF MADISON...AND MOVING EAST AT 25 MPH. * THIS TORNADIC STORM WILL BE NEAR... OLDHAM AROUND 905 PM CDT... THIS TORNADO WARNING IS AN UPGRADE TO THE SEVERE THUNDERSTORM WARNING PREVIOUSLY ISSUED FOR THE WARNED AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS. && LAT...LON 4429 9708 4412 9707 4412 9754 4425 9753 TIME...MOT...LOC 0146Z 268DEG 24KT 4418 9747 $$ RSR
2 follow-up statements
000 WWUS53 KFSD 190206 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 906 PM CDT THU JUN 18 2009 SDC011-077-079-097-190230- /O.CON.KFSD.TO.W.0024.000000T0000Z-090619T0230Z/ MINER SD-LAKE SD-KINGSBURY SD-BROOKINGS SD- 906 PM CDT THU JUN 18 2009 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR SOUTHWESTERN BROOKINGS...SOUTHEASTERN KINGSBURY...NORTHWESTERN LAKE AND NORTHEASTERN MINER COUNTIES... AT 901 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR OLDHAM...OR 14 MILES NORTHWEST OF MADISON...MOVING EAST AT 30 MPH. THE TORNADO WILL BE NEAR... RURAL SOUTHWESTERN BROOKINGS COUNTY THROUGH 920 PM CDT RURAL NORTHERN LAKE COUNTY THROUGH 920 PM CDT AT 854 PM CDT...2 INCH DIAMETER HAIL WAS REPORTED 3 MILES SOUTHWEST OF OLDHAM. PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING GOLF BALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. && LAT...LON 4429 9708 4412 9707 4412 9754 4425 9753 TIME...MOT...LOC 0204Z 266DEG 26KT 4420 9720 $$ RSR
000 WWUS53 KFSD 190227 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 927 PM CDT THU JUN 18 2009 SDC011-077-079-097-190237- /O.EXP.KFSD.TO.W.0024.000000T0000Z-090619T0230Z/ MINER SD-LAKE SD-KINGSBURY SD-BROOKINGS SD- 927 PM CDT THU JUN 18 2009 ...THE TORNADO WARNING FOR FAR SOUTHWESTERN BROOKINGS...SOUTHEASTERN KINGSBURY...NORTHWESTERN LAKE AND NORTHEASTERN MINER COUNTIES EXPIRES AT 930 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 4429 9708 4412 9707 4412 9754 4425 9753 TIME...MOT...LOC 0227Z 266DEG 26KT 4420 9697 $$ RSR
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 8:19 PM CDT | Severe Thunderstorm Warning | FSD | Kingsbury, Lake, Miner | 41 min |
| Jun 18, 9:12 PM CDT | Tornado Warning | FSD | Brookings, Kingsbury, Lake, Moody | 48 min |
| Jun 18, 9:50 PM CDT | Tornado Warning | FSD | Brookings, Moody | 40 min |
| Jun 19, 8:31 AM CDT | River Flood Warning | FSD | Hutchinson, Yankton | 4 days |
Nearby
Tornado Warnings in South Dakota, 2009Every tornado warning in 2009Tornadoes 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.