Alert archive / South Dakota / Tornado Warnings in 2011
Tornado Warning 26, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at May 30, 2011, 7:42 PM CDT for Hanson County, Hutchinson County, McCook County, South Dakota. It was in force for 33 min. 6 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
- May 30, 2011, 7:42 PM CDT (00:42 UTC)
- Expired
- May 30, 2011, 8:15 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), 63 km from the middle of the area, began a volume at 00:44 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 |
|---|---|---|---|
| May 30, 7:51 PM CDT | TSTM WND DMG | 3 N Clayton, SD | |
| May 30, 7:57 PM CDT | TSTM WND DMG | 2 W Bridgewater, SD | |
| May 30, 8:04 PM CDT | TSTM WND GST 73 | 3 S Salem, SD | |
| May 30, 8:04 PM CDT | HAIL 1.75 | 6 W Salem, SD | |
| May 30, 8:08 PM CDT | TSTM WND DMG | Bridgewater, SD | FARM BUILDINGS, POWER LINES, AND GRAIN BINS DAMAGED NEAR BRIDGEWATER AND SOUTH OF SALEM |
| May 30, 8:09 PM CDT | TSTM WND DMG | Bridgewater, SD | TREES DOWN IN BRIDGEWATER. |
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 |
|---|---|---|---|
| May 30, 2:08 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 0.7 hours before the alert went out and 163 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
- 1125 J/kg
- Mixed-layer CIN
- -258 J/kg
- Mixed-layer LCL
- 775 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 174 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -1.0
The text
As transmitted, in the capitals the NWS used until 2016.
918
WFUS53 KFSD 310042
TORFSD
SDC061-067-087-310115-
/O.NEW.KFSD.TO.W.0026.110531T0042Z-110531T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
742 PM CDT MON MAY 30 2011
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHERN HANSON COUNTY IN SOUTHEAST SOUTH DAKOTA...
NORTHEASTERN HUTCHINSON COUNTY IN SOUTHEAST SOUTH DAKOTA...
WESTERN MCCOOK COUNTY IN SOUTHEAST SOUTH DAKOTA...
* UNTIL 815 PM CDT
* AT 742 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
DANGEROUS STORM WAS LOCATED 8 MILES NORTHWEST OF CLAYTON...OR 20
MILES SOUTHEAST OF MITCHELL...AND MOVING NORTHEAST AT 55 MPH.
* THIS TORNADIC STORM WILL BE NEAR...
EMERY AND ALEXANDRIA AROUND 750 PM CDT...
BRIDGEWATER AND FARMER AROUND 755 PM CDT...
SPENCER AROUND 800 PM CDT...
THIS STORM WILL ALSO HAVE THE POTENTIAL TO PRODUCE HAIL TO THE SIZE
OF GOLF BALLS AS WELL AS WINDS TO 80 MPH.
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.
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.
&&
LAT...LON 4385 9746 4352 9733 4350 9737 4350 9740
4347 9740 4326 9769 4366 9797
TIME...MOT...LOC 0042Z 231DEG 47KT 4352 9776
$$
WEISSER3 follow-up statements
229
WWUS53 KFSD 310054
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
754 PM CDT MON MAY 30 2011
SDC061-067-087-310115-
/O.CON.KFSD.TO.W.0026.000000T0000Z-110531T0115Z/
MCCOOK SD-HUTCHINSON SD-HANSON SD-
754 PM CDT MON MAY 30 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN HANSON...
NORTHEASTERN HUTCHINSON AND WESTERN MCCOOK COUNTIES UNTIL 815 PM
CDT...
AT 752 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A CONFIRMED TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR
CLAYTON...OR 25 MILES WEST OF PARKER...MOVING NORTHEAST AT 50 MPH.
THIS DANGEROUS STORM WILL BE NEAR...
BRIDGEWATER AROUND 755 PM CDT...
SPENCER AROUND 800 PM CDT...
AT 751 PM CDT...LAW ENFORCEMENT REPORTED A TORNADO NORTH OF MENNO
NEAR THE HUTCHINSON...MCCOOK AND HANSON COUNTY LINE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.
&&
LAT...LON 4385 9746 4352 9733 4350 9737 4350 9740
4347 9740 4326 9769 4366 9797
TIME...MOT...LOC 0052Z 236DEG 45KT 4352 9758
$$
WEISSER554
WWUS53 KFSD 310100 CCA
SVSFSD
SEVERE WEATHER STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE SIOUX FALLS SD
754 PM CDT MON MAY 30 2011
SDC061-067-087-310115-
/O.COR.KFSD.TO.W.0026.000000T0000Z-110531T0115Z/
MCCOOK SD-HUTCHINSON SD-HANSON SD-
754 PM CDT MON MAY 30 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN HANSON...
NORTHEASTERN HUTCHINSON AND WESTERN MCCOOK COUNTIES UNTIL 815 PM
CDT...
AT 754 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A CONFIRMED TORNADO. THIS DANGEROUS STORM WAS LOCATED 2 MILES WEST
OF BRIDGEWATER...OR 24 MILES NORTHWEST OF PARKER...MOVING NORTHEAST
AT 55 MPH.
THIS DANGEROUS STORM WILL BE NEAR...
SPENCER AROUND 800 PM CDT...
SALEM AROUND 810 PM CDT...
AT 757 PM CDT...A STORM SPOTTER REPORTED A TORNADO 2 MILES WEST OF
BRIDGEWATER. THIS STORM WILL MOVE ACROSS INTERSTATE 90 FROM AROUND
THE SALEM EXIT.
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.
HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.
&&
LAT...LON 4385 9746 4352 9733 4350 9737 4350 9740
4347 9740 4326 9769 4366 9797
TIME...MOT...LOC 0054Z 232DEG 47KT 4355 9755
$$
WEISSER447
WWUS53 KFSD 310113
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
813 PM CDT MON MAY 30 2011
SDC061-067-087-310123-
/O.EXP.KFSD.TO.W.0026.000000T0000Z-110531T0115Z/
MCCOOK SD-HUTCHINSON SD-HANSON SD-
813 PM CDT MON MAY 30 2011
...THE TORNADO WARNING FOR SOUTHERN HANSON...NORTHEASTERN HUTCHINSON
AND WESTERN MCCOOK COUNTIES WILL EXPIRE AT 815 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA...HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM.
LAT...LON 4385 9746 4352 9733 4350 9737 4350 9740
4347 9740 4326 9769 4366 9797
TIME...MOT...LOC 0113Z 232DEG 47KT 4370 9728
$$
WEISSERThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 7:05 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix, Douglas, Hutchinson | 40 min |
| May 30, 7:21 PM CDT | Tornado Warning | FSD | Douglas, Hutchinson | 24 min |
| May 30, 7:29 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix, Hutchinson | 46 min |
| May 30, 8:05 PM CDT | Tornado Warning | FSD | Lake, McCook, Minnehaha | 25 min |
| May 30, 8:09 PM CDT | Tornado Warning | FSD | Brookings, Kingsbury, Lake, Miner | 51 min |
| May 30, 8:46 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Lake, Moody | 44 min |
| May 31, 3:48 AM CDT | Wind Advisory | FSD | Aurora, Beadle, Brookings, Brule, Davison, Hanson and 8 more | 15 hr |
| May 31, 10:10 AM CDT | River Flood Warning | FSD | Union | 86 days |
| May 31, 10:41 AM CDT | River Flood Warning | FSD | Turner | 24 hr |
| May 31, 10:41 AM CDT | River Flood Warning | FSD | Clay | 24 hr |
Nearby
Tornado Warnings in South Dakota, 2011Every tornado warning in 2011Tornadoes in 2011
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.