Alert archive / South Dakota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 53, NWS Sioux Falls, SD

May 5, 2012Aurora County, Brule County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 5, 2012, 7:24 AM CDT for Aurora County, Brule County, South Dakota. It was in force for 36 min. 3 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 5, 2012, 7:24 AM CDT (12:24 UTC)
Expired: May 5, 2012, 8:00 AM CDT
In force: 36 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 58.0 mph

Counties Aurora County, SD, Brule County, SD

The radar

The Sioux Falls radar (KFSD), 175 km from the middle of the area, began a volume at 12:24 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 5, 7:33 AM CDT	HAIL 0.75	8 Sse Kimball, SD
May 5, 7:50 AM CDT	HAIL 1.75	1 Se White Lake, SD	GOLF BALL SIZED HAIL AND ESTIMATED 60 MPH WINDS
May 5, 7:52 AM CDT	HAIL 0.88	7 Sse White Lake, SD

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 5, 6:49 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 0.4 hours before the alert went out and 140 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

821 
WUUS53 KFSD 051224
SVRFSD
SDC003-015-051300-
/O.NEW.KFSD.SV.W.0053.120505T1224Z-120505T1300Z/

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

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL AURORA COUNTY IN SOUTH CENTRAL SOUTH DAKOTA...
  BRULE COUNTY IN SOUTH CENTRAL SOUTH DAKOTA...

* UNTIL 800 AM CDT

* AT 725 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
  HAIL.  THIS STORM WAS LOCATED 9 MILES SOUTHWEST OF GRASS RANCH
  COLONY...OR 12 MILES SOUTH OF KIMBALL...AND MOVING NORTHEAST AT 30
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GRASS RANCH COLONY AROUND 735 AM CDT...
  KIMBALL AROUND 740 AM CDT...
  WHITE LAKE AROUND 755 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 4391 9879 4360 9852 4350 9900 4350 9906
      4372 9924
TIME...MOT...LOC 1225Z 233DEG 26KT 4362 9900
WIND...HAIL <58MPH 1.00IN

$$

CJ

2 follow-up statements

187 
WWUS53 KFSD 051227
SVSFSD

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

SDC003-015-051300-
/O.CON.KFSD.SV.W.0053.000000T0000Z-120505T1300Z/
BRULE SD-AURORA SD-
727 AM CDT SAT MAY 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WEST CENTRAL
AURORA AND BRULE COUNTIES UNTIL 800 AM CDT...

AT 727 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL.  THIS
STORM WAS LOCATED 7 MILES WEST OF GRASS RANCH COLONY...OR 9 MILES
SOUTH OF KIMBALL...MOVING NORTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  GRASS RANCH COLONY AROUND 735 AM CDT...
  KIMBALL AROUND 740 AM CDT...
  WHITE LAKE AROUND 755 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 4391 9879 4360 9852 4350 9900 4350 9906
      4372 9924
TIME...MOT...LOC 1227Z 233DEG 26KT 4363 9898
WIND...HAIL <58MPH 1.75IN

$$

CJ

529 
WWUS53 KFSD 051237
SVSFSD

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

SDC003-015-051300-
/O.CON.KFSD.SV.W.0053.000000T0000Z-120505T1300Z/
BRULE SD-AURORA SD-
737 AM CDT SAT MAY 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WEST CENTRAL
AURORA AND EASTERN BRULE COUNTIES UNTIL 800 AM CDT...

AT 737 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL.  THIS
STORM WAS LOCATED NEAR GRASS RANCH COLONY...OR 6 MILES SOUTH OF
KIMBALL...MOVING NORTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  WHITE LAKE AROUND 755 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 4355 9891 4377 9911 4391 9879 4360 9852
      4353 9886
TIME...MOT...LOC 1237Z 233DEG 26KT 4367 9890
WIND...HAIL <58MPH 1.75IN

$$

CJ

The office that day

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

Issued	Product	Office	Counties	Lasted
May 5, 6:37 AM CDT	Severe Thunderstorm Warning	FSD	Brule, Charles Mix, Gregory	23 min
May 5, 6:53 AM CDT	Severe Thunderstorm Warning	FSD	Brule, Charles Mix, Gregory	37 min
May 5, 7:50 AM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule	40 min
May 5, 8:03 AM CDT	Severe Thunderstorm Warning	FSD	Brule	27 min
May 5, 8:16 AM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison	29 min
May 5, 8:23 AM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Jerauld	37 min
May 5, 8:40 AM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson	35 min
May 5, 8:52 AM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison, Sanborn	23 min
May 5, 9:08 AM CDT	Severe Thunderstorm Warning	FSD	Hanson, Lake, McCook, Miner	37 min
May 5, 9:11 AM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison, Hanson	34 min
May 5, 9:35 AM CDT	Severe Thunderstorm Warning	FSD	Lake, McCook, Miner, Minnehaha	25 min
May 5, 9:40 AM CDT	Severe Thunderstorm Warning	FSD	Hanson, McCook, Miner	35 min
May 5, 9:53 AM CDT	Severe Thunderstorm Warning	FSD	Lake, McCook, Minnehaha, Moody	37 min
May 5, 10:11 AM CDT	Severe Thunderstorm Warning	FSD	McCook, Minnehaha	34 min
May 5, 10:25 AM CDT	Severe Thunderstorm Warning	FSD	Moody	35 min
May 5, 10:30 AM CDT	Flash Flood Warning	FSD	Lake, Moody	3 hr
May 5, 10:36 AM CDT	Severe Thunderstorm Warning	FSD	Beadle	24 min
May 5, 10:42 AM CDT	Severe Thunderstorm Warning	FSD	Minnehaha	48 min
May 5, 12:18 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Kingsbury	27 min
May 5, 12:40 PM CDT	Severe Thunderstorm Warning	FSD	Brookings	23 min
May 5, 3:06 PM CDT	Flash Flood Watch	FSD	Aurora, Beadle, Bon Homme, Brookings, Brule, Charles Mix and 18 more	13 hr
May 5, 6:20 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison, Sanborn	25 min
May 5, 6:40 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Miner, Sanborn	50 min
May 5, 6:51 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Beadle, Davison, Kingsbury, Miner, Sanborn	39 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2012 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.