Alert archive / South Dakota / Tornado Warnings in 2011

Tornado Warning 10, NWS Aberdeen, SD

July 8, 2011Marshall County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jul 8, 2011, 5:32 PM CDT for Marshall County, South Dakota. It was in force for 28 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, 5:32 PM CDT (22:32 UTC)
Expired
Jul 8, 2011, 6:00 PM CDT
In force
28 min
Issued by
NWS Aberdeen, SD
Area
Storm-based polygon

County Marshall County, SD

The radar

The Aberdeen radar (KABR), 70 km from the middle of the area, began a volume at 22:32 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, 10.5 hours before the alert went out and 113 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.

Skew-T log-pSkew-T log-p diagram, Aberdeen, SD at 12:00Z on 2011-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 626 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 12:00Z on 2011-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

424 
WFUS53 KABR 082232
TORABR
SDC091-082300-
/O.NEW.KABR.TO.W.0010.110708T2232Z-110708T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
532 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 600 PM CDT

* AT 530 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD 7
  MILES NORTHWEST OF FORT SISSETON STATE PARK...OR 8 MILES SOUTHEAST
  OF BRITTON. A TORNADO MAY DEVELOP AT ANY TIME! DOPPLER RADAR SHOWED
  THIS TORNADIC STORM MOVING NORTHEAST AT 5 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 4582 9762 4574 9745 4564 9760 4573 9777
TIME...MOT...LOC 2232Z 221DEG 6KT 4575 9760

$$
WISE

The office that day

Everything else NWS Aberdeen, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 8, 5:46 PM CDTTornado WarningABRMarshall29 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.