Alert archive / South Dakota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 59, NWS Sioux Falls, SD

May 5, 2012Aurora County, Davison County, Sanborn County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 5, 2012, 8:52 AM CDT for Aurora County, Davison County, Sanborn County, South Dakota. It was in force for 23 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
May 5, 2012, 8:52 AM CDT (13:52 UTC)
Expired
May 5, 2012, 9:15 AM CDT
In force
23 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon
Hail
1.0 in
Wind
58.0 mph

Counties Aurora County, SD, Davison County, SD, Sanborn County, SD

The radar

The Sioux Falls radar (KFSD), 138 km from the middle of the area, began a volume at 13:52 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.

IssuedProductOfficeLasted
May 5, 6:49 AM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 1.9 hours before the alert went out and 122 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 2012-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 12:00Z on 2012-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
554 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

666 
WUUS53 KFSD 051352
SVRFSD
SDC003-035-111-051415-
/O.NEW.KFSD.SV.W.0059.120505T1352Z-120505T1415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
852 AM CDT SAT MAY 5 2012

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  AURORA COUNTY IN SOUTH CENTRAL SOUTH DAKOTA...
  NORTHWESTERN DAVISON COUNTY IN SOUTHEAST SOUTH DAKOTA...
  SOUTHWESTERN SANBORN COUNTY IN EAST CENTRAL SOUTH DAKOTA...

* UNTIL 915 AM CDT

* AT 852 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
  HAIL.  THIS STORM WAS LOCATED 6 MILES NORTHEAST OF WHITE LAKE...OR
  7 MILES NORTHWEST OF PLANKINTON...AND MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MOUNT VERNON AROUND 910 AM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

&&

LAT...LON 4394 9824 4360 9824 4359 9868 4394 9868
TIME...MOT...LOC 1352Z 260DEG 35KT 4379 9854
WIND...HAIL <58MPH 1.00IN

$$

CJ
1 follow-up statement
524 
WWUS53 KFSD 051402
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
902 AM CDT SAT MAY 5 2012

SDC003-035-111-051415-
/O.CON.KFSD.SV.W.0059.000000T0000Z-120505T1415Z/
SANBORN SD-DAVISON SD-AURORA SD-
902 AM CDT SAT MAY 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
AURORA...NORTHWESTERN DAVISON AND SOUTHWESTERN SANBORN COUNTIES UNTIL
915 AM CDT...

AT 902 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED 2 MILES NORTH OF PLANKINTON...MOVING EAST AT 40
MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  MOUNT VERNON AROUND 910 AM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

&&

LAT...LON 4393 9861 4394 9824 4360 9824 4359 9859
TIME...MOT...LOC 1402Z 260DEG 35KT 4381 9841
WIND...HAIL <58MPH 1.00IN

$$

HANKO

The office that day

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

IssuedProductOfficeCountiesLasted
May 5, 6:37 AM CDTSevere Thunderstorm WarningFSDBrule, Charles Mix, Gregory23 min
May 5, 6:53 AM CDTSevere Thunderstorm WarningFSDBrule, Charles Mix, Gregory37 min
May 5, 7:24 AM CDTSevere Thunderstorm WarningFSDAurora, Brule36 min
May 5, 7:50 AM CDTSevere Thunderstorm WarningFSDAurora, Brule40 min
May 5, 8:03 AM CDTSevere Thunderstorm WarningFSDBrule27 min
May 5, 8:16 AM CDTSevere Thunderstorm WarningFSDAurora, Davison29 min
May 5, 8:23 AM CDTSevere Thunderstorm WarningFSDAurora, Brule, Jerauld37 min
May 5, 8:40 AM CDTSevere Thunderstorm WarningFSDDavison, Hanson35 min
May 5, 9:08 AM CDTSevere Thunderstorm WarningFSDHanson, Lake, McCook, Miner37 min
May 5, 9:11 AM CDTSevere Thunderstorm WarningFSDAurora, Davison, Hanson34 min
May 5, 9:35 AM CDTSevere Thunderstorm WarningFSDLake, McCook, Miner, Minnehaha25 min
May 5, 9:40 AM CDTSevere Thunderstorm WarningFSDHanson, McCook, Miner35 min
May 5, 9:53 AM CDTSevere Thunderstorm WarningFSDLake, McCook, Minnehaha, Moody37 min
May 5, 10:11 AM CDTSevere Thunderstorm WarningFSDMcCook, Minnehaha34 min
May 5, 10:25 AM CDTSevere Thunderstorm WarningFSDMoody35 min
May 5, 10:30 AM CDTFlash Flood WarningFSDLake, Moody3 hr
May 5, 10:36 AM CDTSevere Thunderstorm WarningFSDBeadle24 min
May 5, 10:42 AM CDTSevere Thunderstorm WarningFSDMinnehaha48 min
May 5, 12:18 PM CDTSevere Thunderstorm WarningFSDBrookings, Kingsbury27 min
May 5, 12:40 PM CDTSevere Thunderstorm WarningFSDBrookings23 min
May 5, 3:06 PM CDTFlash Flood WatchFSDAurora, Beadle, Bon Homme, Brookings, Brule, Charles Mix and 18 more13 hr
May 5, 6:20 PM CDTSevere Thunderstorm WarningFSDAurora, Davison, Sanborn25 min
May 5, 6:40 PM CDTSevere Thunderstorm WarningFSDDavison, Hanson, Miner, Sanborn50 min
May 5, 6:51 PM CDTSevere Thunderstorm WarningFSDAurora, Beadle, Davison, Kingsbury, Miner, Sanborn39 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2012Every severe thunderstorm warning 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.