Alert archive / South Dakota / Tornado Warnings in 2009
Tornado Warning 47, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Aug 8, 2009, 1:12 PM CDT for Hanson County, Hutchinson County, McCook County, South Dakota. It was in force for 33 min. 2 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
- Aug 8, 2009, 1:12 PM CDT (18:12 UTC)
- Expired
- Aug 8, 2009, 1:45 PM CDT
- In force
- 33 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
Counties Hanson County, SD, Hutchinson County, SD, McCook County, SD
The radar
The Sioux Falls radar (KFSD), 54 km from the middle of the area, began a volume at 18:12 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 |
|---|---|---|---|
| Aug 8, 1:18 PM CDT | HAIL 1 | 3 Se Emery, SD | |
| Aug 8, 1:51 PM CDT | TSTM WND GST 70 | Canistota, SD | 70 MPH WIND GUSTS BREAKING SMALL BRANCHES OFF TREES. |
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 |
|---|---|---|---|
| Aug 8, 11:15 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 8, 12:47 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 6.2 hours before the alert went out and 166 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
- 3 J/kg
- Mixed-layer CIN
- -564 J/kg
- Mixed-layer LCL
- 1478 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- -219 m²/s²
- 0-3 km storm-relative helicity
- -319 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KFSD 081812 TORFSD SDC061-067-087-081845- /O.NEW.KFSD.TO.W.0047.090808T1812Z-090808T1845Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 112 PM CDT SAT AUG 8 2009 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN HANSON COUNTY IN SOUTHEAST SOUTH DAKOTA NORTHEASTERN HUTCHINSON COUNTY IN SOUTHEAST SOUTH DAKOTA SOUTHERN MCCOOK COUNTY IN SOUTHEAST SOUTH DAKOTA * UNTIL 145 PM CDT * AT 109 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR EMERY...OR 23 MILES SOUTHEAST OF MITCHELL... AND MOVING EAST AT 40 MPH. * THIS TORNADIC STORM WILL BE NEAR... BRIDGEWATER AROUND 120 PM CDT... CANISTOTA AROUND 135 PM CDT... LAKE VERMILLION STATE RECREATION AREA AROUND 145 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. && LAT...LON 4370 9717 4353 9715 4345 9772 4360 9777 TIME...MOT...LOC 1812Z 256DEG 34KT 4356 9761 $$ WILLIAMS
2 follow-up statements
000
WWUS53 KFSD 081829
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
129 PM CDT SAT AUG 8 2009
SDC061-067-087-081845-
/O.CON.KFSD.TO.W.0047.000000T0000Z-090808T1845Z/
HANSON SD-MCCOOK SD-HUTCHINSON SD-
129 PM CDT SAT AUG 8 2009
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 145 PM CDT FOR
NORTHEASTERN HUTCHINSON...SOUTHERN MCCOOK AND SOUTHEASTERN HANSON
COUNTIES...
AT 127 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR BRIDGEWATER...OR 22
MILES NORTHWEST OF PARKER...MOVING EAST AT 35 MPH.
THE TORNADO WILL BE NEAR...
CANISTOTA AROUND 145 PM CDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CDT SATURDAY EVENING
FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND SOUTHEASTERN SOUTH
DAKOTA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 600
PM CDT SATURDAY EVENING FOR SOUTHEASTERN SOUTH DAKOTA.
&&
LAT...LON 4361 9774 4370 9717 4361 9716 4354 9715
4349 9745 4348 9750 4347 9760
TIME...MOT...LOC 1829Z 255DEG 32KT 4360 9747
$$
WILLIAMS000
WWUS53 KFSD 081846
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
146 PM CDT SAT AUG 8 2009
SDC061-067-087-081855-
/O.EXP.KFSD.TO.W.0047.000000T0000Z-090808T1845Z/
HANSON SD-MCCOOK SD-HUTCHINSON SD-
146 PM CDT SAT AUG 8 2009
...THE TORNADO WARNING FOR NORTHEASTERN HUTCHINSON...SOUTHERN MCCOOK
AND SOUTHEASTERN HANSON COUNTIES EXPIRED AT 145 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WESTERN
PART OF THE WARNED AREA...HOWEVER A NEW TORNADO WARNING COVERS
CENTRAL MCCOOK AND NORTHWESTERN MINNEHAHA COUNTIES.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CDT SATURDAY EVENING
FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND SOUTHEASTERN SOUTH
DAKOTA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 600
PM CDT SATURDAY EVENING FOR SOUTHEASTERN SOUTH DAKOTA.
LAT...LON 4361 9774 4370 9717 4361 9716 4354 9715
4349 9745 4348 9750 4347 9760
TIME...MOT...LOC 1845Z 255DEG 32KT 4364 9728
$$
WILLIAMSThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 11:09 AM CDT | Severe Thunderstorm Warning | FSD | Brule, Charles Mix, Gregory | 36 min |
| Aug 8, 11:42 AM CDT | Severe Thunderstorm Warning | FSD | Aurora, Brule, Charles Mix, Douglas | 33 min |
| Aug 8, 12:10 PM CDT | Tornado Warning | FSD | Aurora, Davison, Douglas | 35 min |
| Aug 8, 12:44 PM CDT | Tornado Warning | FSD | Davison, Hanson | 31 min |
| Aug 8, 1:15 PM CDT | Tornado Warning | FSD | Hanson, McCook, Miner | 30 min |
| Aug 8, 1:42 PM CDT | Tornado Warning | FSD | McCook, Minnehaha | 33 min |
| Aug 8, 1:55 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix, Gregory, Hutchinson, Yankton | 50 min |
| Aug 8, 1:57 PM CDT | Severe Thunderstorm Warning | FSD | Gregory | 48 min |
| Aug 8, 1:59 PM CDT | Tornado Warning | FSD | McCook, Minnehaha | 16 min |
| Aug 8, 2:12 PM CDT | Tornado Warning | FSD | Lake, McCook, Minnehaha, Moody | 33 min |
| Aug 8, 2:25 PM CDT | Severe Thunderstorm Warning | FSD | Lake, Moody | 35 min |
| Aug 8, 2:43 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Hutchinson, Turner, Yankton | 30 min |
| Aug 8, 2:47 PM CDT | Tornado Warning | FSD | Bon Homme, Yankton | 23 min |
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.