Alert archive / South Dakota / Tornado Warnings in 2009
Tornado Warning 42, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Jul 7, 2009, 8:51 PM CDT for Miner County, South Dakota. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 7, 2009, 8:51 PM CDT (01:51 UTC)
- Expired
- Jul 7, 2009, 9:15 PM CDT
- In force
- 24 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
County Miner County, SD
The radar
The Sioux Falls radar (KFSD), 73 km from the middle of the area, began a volume at 01:53 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.
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 00:00Z, 1.9 hours before the alert went out and 128 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1262 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 213 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 080151 TORFSD SDC097-080215- /O.NEW.KFSD.TO.W.0042.090708T0151Z-090708T0215Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 851 PM CDT TUE JUL 7 2009 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN MINER COUNTY IN EAST CENTRAL SOUTH DAKOTA * UNTIL 915 PM CDT * AT 850 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR VILAS...OR 25 MILES WEST OF MADISON...AND MOVING SOUTHEAST AT 25 MPH. * THIS TORNADIC STORM WILL BE NEAR... CANOVA AROUND 915 PM CDT... 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 4391 9738 4384 9754 4399 9765 4404 9757 TIME...MOT...LOC 0151Z 322DEG 21KT 4400 9760 $$ JM
2 follow-up statements
000 WWUS53 KFSD 080203 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 903 PM CDT TUE JUL 7 2009 SDC097-080215- /O.CON.KFSD.TO.W.0042.000000T0000Z-090708T0215Z/ MINER SD- 903 PM CDT TUE JUL 7 2009 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR SOUTHEASTERN MINER COUNTY... AT 900 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO. THIS TORNADO WAS LOCATED 6 MILES NORTHWEST OF CANOVA...OR 23 MILES WEST OF MADISON...MOVING SOUTHEAST AT 25 MPH. THE TORNADO WILL BE NEAR... CANOVA AROUND 915 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT TUESDAY EVENING FOR NORTHWEST IOWA AND SOUTHWEST MINNESOTA AND NORTHEAST NEBRASKA AND SOUTHEASTERN SOUTH DAKOTA. && LAT...LON 4395 9762 4400 9751 4391 9738 4384 9754 TIME...MOT...LOC 0203Z 322DEG 21KT 4395 9754 $$ JM
000 WWUS53 KFSD 080211 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 911 PM CDT TUE JUL 7 2009 SDC097-080221- /O.EXP.KFSD.TO.W.0042.000000T0000Z-090708T0215Z/ MINER SD- 911 PM CDT TUE JUL 7 2009 ...THE TORNADO WARNING FOR SOUTHEASTERN MINER COUNTY EXPIRES AT 915 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND NO LONGER APPEARED TO BE SEVERE. 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 4395 9762 4400 9751 4391 9738 4384 9754 TIME...MOT...LOC 0211Z 322DEG 21KT 4391 9750 $$ JM
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 7:32 PM CDT | Severe Thunderstorm Warning | FSD | Beadle, Kingsbury, Miner, Sanborn | 43 min |
| Jul 7, 7:51 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 39 min |
| Jul 7, 7:56 PM CDT | Flash Flood Warning | FSD | Lincoln, Minnehaha | 2 hr |
| Jul 7, 7:57 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Minnehaha, Turner | 33 min |
| Jul 7, 8:23 PM CDT | Tornado Warning | FSD | Kingsbury, Miner, Sanborn | 29 min |
| Jul 7, 8:58 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Union | 32 min |
| Jul 7, 9:10 PM CDT | Flash Flood Warning | FSD | Union | 3 hr |
| Jul 7, 9:14 PM CDT | Severe Thunderstorm Warning | FSD | Beadle, Miner, Sanborn | 46 min |
| Jul 7, 9:58 PM CDT | Severe Thunderstorm Warning | FSD | Davison, Hanson, McCook, Miner, Sanborn | 47 min |
| Jul 7, 10:07 PM CDT | Flash Flood Warning | FSD | Clay, Yankton | 88 min |
| Jul 7, 10:49 PM CDT | Severe Thunderstorm Warning | FSD | Union | 41 min |
| Jul 8, 2:12 AM CDT | Flash Flood Warning | FSD | Union | 3 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.