Alert archive / South Dakota / Tornado Warnings in 2011
Tornado Warning 11, NWS Aberdeen, SD
NWS Aberdeen, SD issued this tornado warning at Jul 8, 2011, 5:46 PM CDT for Marshall County, South Dakota. It was in force for 29 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 8, 2011, 5:46 PM CDT (22:46 UTC)
- Expired
- Jul 8, 2011, 6:15 PM CDT
- In force
- 29 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
County Marshall County, SD
The radar
The Aberdeen radar (KABR), 78 km from the middle of the area, began a volume at 22:45 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, 10.8 hours before the alert went out and 121 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
- 626 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 1133 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
376 WFUS53 KABR 082246 TORABR SDC091-082315- /O.NEW.KABR.TO.W.0011.110708T2246Z-110708T2315Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ABERDEEN SD 546 PM CDT FRI JUL 8 2011 THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A * TORNADO WARNING FOR... CENTRAL MARSHALL COUNTY IN NORTHEAST SOUTH DAKOTA... * UNTIL 615 PM CDT * AT 542 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD 7 MILES NORTHWEST OF LAKE CITY...OR 10 MILES EAST OF BRITTON. A TORNADO MAY DEVELOP AT ANY TIME! DOPPLER RADAR SHOWED THIS TORNADIC STORM MOVING NORTHEAST AT 8 MPH. * THE TORNADO WILL AFFECT MAINLY RURAL AREAS OF CENTRAL MARSHALL COUNTY. 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 4590 9755 4579 9736 4566 9752 4577 9772 TIME...MOT...LOC 2246Z 219DEG 6KT 4579 9754 $$ WISE
1 follow-up statement
374 WWUS53 KABR 082307 SVSABR SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ABERDEEN SD 607 PM CDT FRI JUL 8 2011 SDC091-082317- /O.EXP.KABR.TO.W.0011.000000T0000Z-110708T2315Z/ MARSHALL SD- 607 PM CDT FRI JUL 8 2011 ...THE TORNADO WARNING FOR CENTRAL MARSHALL COUNTY WILL EXPIRE AT 615 PM CDT/515 PM MDT/... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY...HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM. A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT SATURDAY MORNING FOR WEST CENTRAL MINNESOTA AND NORTHEAST SOUTH DAKOTA. LAT...LON 4590 9755 4579 9736 4566 9752 4577 9772 TIME...MOT...LOC 2307Z 219DEG 6KT 4582 9751 $$ SD
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 5:32 PM CDT | Tornado Warning | ABR | Marshall | 28 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.