Alert archive / South Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 90, NWS Sioux Falls, SD

May 30, 20116 counties in South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 30, 2011, 12:14 AM CDT for 6 counties in South Dakota. It was in force for 31 min. 1 report 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, 12:14 AM CDT (05:14 UTC)
Expired: May 30, 2011, 12:45 AM CDT
In force: 31 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 58.0 mph

Counties Bon Homme County, SD, Charles Mix County, SD, Douglas County, SD, Hutchinson County, SD, Turner County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 97 km from the middle of the area, began a volume at 05:15 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, 12:28 AM CDT	HAIL 1.5	5 Nnw Scotland, 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 29, 10:58 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 5.2 hours before the alert went out and 177 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: 1349 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 561 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.

250 
WUUS53 KFSD 300514
SVRFSD
SDC009-023-043-067-125-135-300545-
/O.NEW.KFSD.SV.W.0090.110530T0514Z-110530T0545Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1214 AM CDT MON MAY 30 2011

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BON HOMME COUNTY IN SOUTHEAST SOUTH DAKOTA...
  CENTRAL CHARLES MIX COUNTY IN SOUTH CENTRAL SOUTH DAKOTA...
  DOUGLAS COUNTY IN SOUTH CENTRAL SOUTH DAKOTA...
  HUTCHINSON COUNTY IN SOUTHEAST SOUTH DAKOTA...
  CENTRAL TURNER COUNTY IN SOUTHEAST SOUTH DAKOTA...
  NORTHERN YANKTON COUNTY IN SOUTHEAST SOUTH DAKOTA...

* UNTIL 1245 AM CDT

* AT 1215 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
  QUARTER SIZE HAIL.  THESE STORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM ARMOUR TO MAYFIELD...AND MOVING NORTHEAST AT 35 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CORSICA AND MAYFIELD AROUND 1220 AM CDT...
  MENNO AROUND 1225 AM CDT...
  PARKSTON AROUND 1235 AM CDT...
  FREEMAN...CLAYTON...HURLEY AND DAVIS AROUND 1245 AM CDT...

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
OLIVET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4350 9839 4350 9763 4331 9693 4297 9735
      4331 9862
TIME...MOT...LOC 0515Z 221DEG 31KT 4335 9841 4308 9737
WIND...HAIL <58MPH 1.00IN

$$

BT

3 follow-up statements

745 
WWUS53 KFSD 300519
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1219 AM CDT MON MAY 30 2011

SDC009-023-043-067-125-135-300545-
/O.CON.KFSD.SV.W.0090.000000T0000Z-110530T0545Z/
HUTCHINSON SD-DOUGLAS SD-CHARLES MIX SD-BON HOMME SD-TURNER SD-
YANKTON SD-
1219 AM CDT MON MAY 30 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
YANKTON...CENTRAL TURNER...NORTHEASTERN BON HOMME...CENTRAL CHARLES
MIX...DOUGLAS AND HUTCHINSON COUNTIES UNTIL 1245 AM CDT...

AT 1219 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
ARMOUR TO MAYFIELD...MOVING NORTHEAST AT 35 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  MENNO AROUND 1225 AM CDT...
  PARKSTON AROUND 1235 AM CDT...
  FREEMAN...CLAYTON...HURLEY AND DAVIS AROUND 1245 AM CDT...

OTHER LOCATIONS IMPACTED BY THIS LINE OF SEVERE THUNDERSTORMS INCLUDE
OLIVET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4350 9839 4350 9763 4331 9693 4297 9735
      4331 9862
TIME...MOT...LOC 0519Z 221DEG 31KT 4338 9838 4310 9734
WIND...HAIL <58MPH 1.00IN

$$

BT

794 
WWUS53 KFSD 300528
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1228 AM CDT MON MAY 30 2011

SDC009-023-043-067-125-135-300545-
/O.CON.KFSD.SV.W.0090.000000T0000Z-110530T0545Z/
HUTCHINSON SD-DOUGLAS SD-CHARLES MIX SD-BON HOMME SD-TURNER SD-
YANKTON SD-
1228 AM CDT MON MAY 30 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
YANKTON...CENTRAL TURNER...NORTHEASTERN BON HOMME...CENTRAL CHARLES
MIX...DOUGLAS AND HUTCHINSON COUNTIES UNTIL 1245 AM CDT...

AT 1227 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WALNUT
SIZE HAIL.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
CORSICA TO 7 MILES NORTH OF MAYFIELD...MOVING NORTHEAST AT 35 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  HURLEY...FREEMAN AND DIMOCK AROUND 1240 AM CDT...
  CLAYTON AND DAVIS AROUND 1245 AM CDT...

AT 1227 AM...A TRAINED SPOTTER REPORTED WALNUT SIZED HAIL IN OLIVET. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4350 9839 4350 9763 4331 9693 4297 9735
      4331 9862
TIME...MOT...LOC 0527Z 221DEG 31KT 4343 9832 4320 9724
WIND...HAIL <58MPH 1.50IN

$$

BT

665 
WWUS53 KFSD 300541
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1241 AM CDT MON MAY 30 2011

SDC009-023-043-067-125-135-300551-
/O.EXP.KFSD.SV.W.0090.000000T0000Z-110530T0545Z/
HUTCHINSON SD-DOUGLAS SD-CHARLES MIX SD-BON HOMME SD-TURNER SD-
YANKTON SD-
1241 AM CDT MON MAY 30 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN YANKTON...CENTRAL
TURNER...NORTHEASTERN BON HOMME...CENTRAL CHARLES MIX...DOUGLAS AND
HUTCHINSON COUNTIES WILL EXPIRE AT 1245 AM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR 
PROPERTY...HOWEVER BRIEF HEAVY RAIN IS STILL POSSIBLE WITH THESE 
THUNDERSTORMS.

LAT...LON 4350 9839 4350 9763 4331 9693 4297 9735
      4331 9862
TIME...MOT...LOC 0541Z 221DEG 31KT 4352 9821 4329 9713

$$

BT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 11:03 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix	42 min
May 29, 11:30 PM CDT	Severe Thunderstorm Warning	FSD	Hutchinson, Turner	45 min
May 29, 11:39 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix, Douglas, Gregory, Hutchinson, Turner and 1 more	36 min
May 30, 12:53 AM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Miner, Sanborn	37 min
May 30, 1:46 AM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld	44 min
May 30, 2:39 AM CDT	Severe Thunderstorm Warning	FSD	Beadle	36 min
May 30, 3:36 AM CDT	Severe Thunderstorm Warning	FSD	Brookings	39 min
May 30, 9:28 AM CDT	River Flood Warning	FSD	Minnehaha	71 hr
May 30, 5:08 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	37 min
May 30, 5:37 PM CDT	Severe Thunderstorm Warning	FSD	Jerauld	23 min
May 30, 5:48 PM CDT	Tornado Warning	FSD	Bon Homme, Charles Mix	42 min
May 30, 6:26 PM CDT	Tornado Warning	FSD	Bon Homme, Charles Mix, Douglas, Hutchinson	34 min
May 30, 6:33 PM CDT	Tornado Warning	FSD	Beadle	27 min
May 30, 6:38 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Gregory	52 min
May 30, 6:51 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Miner, Sanborn	39 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2011 Every severe thunderstorm warning 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.