Alert archive / South Dakota / Tornado Warnings in 2009
Tornado Warning 23, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Jun 17, 2009, 5:54 PM CDT for Gregory County, South Dakota. It was in force for 36 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 17, 2009, 5:54 PM CDT (22:54 UTC)
- Expired
- Jun 17, 2009, 6:30 PM CDT
- In force
- 36 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
County Gregory County, SD
The radar
The North Platte radar (KLNX), 160 km from the middle of the area, began a volume at 22:57 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 17, 6:04 PM CDT | HAIL 1 | 12 Sse Gregory, SD | LARGE BRANCHES DOWN |
| Jun 17, 6:13 PM CDT | HAIL 1.75 | 12 S Burke, SD | |
| Jun 17, 6:25 PM CDT | HAIL 1 | 8 S Herrick, SD |
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 12:00Z, 10.9 hours before the alert went out and 218 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
- 368 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 831 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KFSD 172254 TORFSD SDC053-172330- /O.NEW.KFSD.TO.W.0023.090617T2254Z-090617T2330Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 554 PM CDT WED JUN 17 2009 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... EXTREME SOUTHWESTERN GREGORY COUNTY IN SOUTH CENTRAL SOUTH DAKOTA * UNTIL 630 PM CDT * AT 552 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 8 MILES NORTHWEST OF MILLS...OR 30 MILES NORTH OF BASSETT...AND MOVING EAST AT 20 MPH. * THIS TORNADIC STORM WILL BE NEAR... RURAL GREGORY COUNTY THROUGH 610 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. && LAT...LON 4310 9918 4299 9917 4299 9953 4308 9952 TIME...MOT...LOC 2254Z 274DEG 17KT 4301 9950 $$ WEISSER
3 follow-up statements
000 WWUS53 KFSD 172258 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 558 PM CDT WED JUN 17 2009 SDC053-172330- /O.CON.KFSD.TO.W.0023.000000T0000Z-090617T2330Z/ GREGORY SD- 558 PM CDT WED JUN 17 2009 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR EXTREME SOUTHWESTERN GREGORY COUNTY... AT 556 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO. THIS TORNADO WAS LOCATED OVER EXTREME SOUTHWESTERN GREGORY COUNTY...OR 29 MILES NORTH OF BASSETT...MOVING EAST AT 20 MPH. THE TORNADO WILL BE NEAR... RURAL SOUTHERN GREGORY COUNTY THROUGH 620 PM CDT PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. A FUNNEL CLOUD WAS REPORTED RECENTLY WITH THIS STORM ABOUT 7 MILES NORTHEAST OF BURTON. && LAT...LON 4310 9918 4299 9917 4299 9953 4308 9952 TIME...MOT...LOC 2258Z 274DEG 17KT 4301 9947 $$ WEISSER
000 WWUS53 KFSD 172318 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 618 PM CDT WED JUN 17 2009 SDC053-172330- /O.CON.KFSD.TO.W.0023.000000T0000Z-090617T2330Z/ GREGORY SD- 618 PM CDT WED JUN 17 2009 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR SOUTHWESTERN GREGORY COUNTY... AT 615 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO. THIS TORNADO WAS LOCATED OVER SOUTHWESTERN GREGORY COUNTY...OR ABOUT 10 MILES SOUTH OF BURKE...MOVING EAST AT 20 MPH. THE TORNADO WILL BE NEAR... RURAL SOUTHERN GREGORY COUNTY THROUGH 630 PM CDT AT 613 PM CDT...GOLF BALL SIZED HAIL WAS REPORTED 12 MILES SOUTH OF BURKE. IF YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY. HOUSE AND WINDOW DAMAGE WAS ALSO REPORTED 16 MILES SOUTHWEST OF BURKE. 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. && LAT...LON 4310 9918 4299 9917 4299 9953 4308 9952 TIME...MOT...LOC 2315Z 274DEG 17KT 4300 9936 $$ WEISSER
000 WWUS53 KFSD 172329 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 629 PM CDT WED JUN 17 2009 SDC053-172337- /O.EXP.KFSD.TO.W.0023.000000T0000Z-090617T2330Z/ GREGORY SD- 629 PM CDT WED JUN 17 2009 ...THE TORNADO WARNING FOR SOUTHWESTERN GREGORY COUNTY EXPIRES AT 630 PM CDT... HAIL AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM. THE STRONGEST ROTATION WAS JUST ON THE NEBRASKA SIDE OF THE BORDER NEAR NAPER. LARGE HAIL WILL STILL BE POSSIBLE WITH THIS STORM AROUND BONESTEEL AND FAIRFAX AND A NEW SEVERE THUNDERSTORM WILL BE ISSUED SHORTLY. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT THURSDAY MORNING FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND NORTHEAST NEBRASKA AND SOUTHEASTERN SOUTH DAKOTA. LAT...LON 4310 9918 4299 9917 4299 9953 4308 9952 TIME...MOT...LOC 2327Z 274DEG 17KT 4300 9928 $$ WEISSER
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, 9:05 PM CDT | Tornado Warning | FSD | Bon Homme, Clay, Yankton | 25 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, 6:31 PM CDT | Severe Thunderstorm Warning | FSD | Gregory | 44 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.