Alert archive / South Dakota / Tornado Warnings in 2012
Tornado Warning 3, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Apr 15, 2012, 2:56 PM CDT for Bon Homme County, South Dakota. It was in force for 34 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
- Apr 15, 2012, 2:56 PM CDT (19:56 UTC)
- Expired
- Apr 15, 2012, 3:30 PM CDT
- In force
- 34 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
County Bon Homme County, SD
The radar
The Sioux Falls radar (KFSD), 102 km from the middle of the area, began a volume at 19:59 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 nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 7.9 hours before the alert went out and 213 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
- 484 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 656 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
037
WFUS53 KFSD 151956
TORFSD
SDC009-152030-
/O.NEW.KFSD.TO.W.0003.120415T1956Z-120415T2030Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
256 PM CDT SUN APR 15 2012
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* TORNADO WARNING FOR...
BON HOMME COUNTY IN SOUTHEAST SOUTH DAKOTA...
* UNTIL 330 PM CDT
* AT 256 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A SEVERE THUNDERSTORM WITH A HISTORY OF PRODUCING A
TORNADO. THIS TORNADIC STORM WAS LOCATED NEAR TYNDALL...OR 23 MILES
WEST OF YANKTON...AND MOVING NORTH AT 35 MPH.
* THIS TORNADIC STORM WILL BE NEAR...
SCOTLAND AROUND 325 PM CDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4285 9774 4290 9800 4317 9785 4317 9773
4317 9767 4316 9764 4310 9764
TIME...MOT...LOC 1956Z 199DEG 29KT 4295 9784
$$
MJF2 follow-up statements
906
WWUS53 KFSD 152009
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
309 PM CDT SUN APR 15 2012
SDC009-152030-
/O.CON.KFSD.TO.W.0003.000000T0000Z-120415T2030Z/
BON HOMME SD-
309 PM CDT SUN APR 15 2012
...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN BON HOMME
COUNTY UNTIL 330 PM CDT...
AT 307 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM WITH A HISTORY OF OF PRODUCING TORNADOES.
THIS DANGEROUS STORM WAS LOCATED NEAR TYNDALL...OR 21 MILES WEST OF
YANKTON...MOVING NORTH AT 35 MPH.
THIS DANGEROUS STORM WILL BE NEAR...
SCOTLAND AROUND 325 PM CDT...
THE STRONGEST ROTATION WAS TRACKING JUST EAST OF TYNDALL. THIS STORM
HAS PRODUCED BRIEF TORNADO TOUCHDOWNS IN KNOX COUNTY NEBRASKA AND
ALSO LIKELY NEAR THE MISSOURI RIVER JUST NORTH OF SANTEE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4290 9773 4296 9795 4317 9785 4317 9767
4316 9764 4310 9764
TIME...MOT...LOC 2007Z 199DEG 29KT 4301 9778
$$
MJF456
WWUS53 KFSD 152032
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
332 PM CDT SUN APR 15 2012
SDC009-152041-
/O.EXP.KFSD.TO.W.0003.000000T0000Z-120415T2030Z/
BON HOMME SD-
332 PM CDT SUN APR 15 2012
...THE TORNADO WARNING FOR NORTHEASTERN BON HOMME COUNTY HAS
EXPIRED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
NON SUPERCELL TORNADOES CAN TOUCH THE GROUND WITH LITTLE ADVANCED
WARNING. STORMS WHICH ARE MOVING UP THE JAMES RIVER VALLEY HAVE
PRODUCED FUNNEL CLOUDS. BE VERY ALERT FOR CHANGING WEATHER
CONDITIONS AND ANY FUTURE STATEMENTS AND WARNINGS.
LAT...LON 4290 9773 4296 9795 4317 9785 4317 9767
4316 9764 4310 9764
TIME...MOT...LOC 2009Z 199DEG 29KT 4303 9777
$$
MJFThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 11:22 AM CDT | Severe Thunderstorm Warning | FSD | Davison, Hanson, Miner, Sanborn | 23 min |
| Apr 15, 11:45 AM CDT | Severe Thunderstorm Warning | FSD | Beadle, Kingsbury, Miner, Sanborn | 45 min |
| Apr 15, 3:19 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Moody | 16 min |
| Apr 15, 5:10 PM CDT | High Wind Warning | FSD | Aurora, Beadle, Bon Homme, Brookings, Brule, Charles Mix and 17 more | 11 hr |
| Apr 15, 5:10 PM CDT | Wind Advisory | FSD | Aurora, Brule, Charles Mix, Douglas, Gregory, Jerauld | 3 hr |
Nearby
Tornado Warnings in South Dakota, 2012Every tornado warning in 2012Tornadoes in 2012
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.