Alert archive / South Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 147, NWS Sioux Falls, SD

July 1, 2011Lake County, McCook County, Miner County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 1, 2011, 2:14 PM CDT for Lake County, McCook County, Miner County, South Dakota. It was in force for 46 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: Jul 1, 2011, 2:14 PM CDT (19:14 UTC)
Expired: Jul 1, 2011, 3:00 PM CDT
In force: 46 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Lake County, SD, McCook County, SD, Miner County, SD

The radar

The Sioux Falls radar (KFSD), 73 km from the middle of the area, began a volume at 19:17 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
Jul 1, 2:15 PM CDT	HAIL 2.5	5 Ese Canova, 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
Jul 1, 2:08 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 7.2 hours before the alert went out and 125 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: 407 J/kg
Mixed-layer CIN: -374 J/kg
Mixed-layer LCL: 983 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: -270 m²/s²
0-3 km storm-relative helicity: -229 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

330 
WUUS53 KFSD 011914
SVRFSD
SDC079-087-097-012000-
/O.NEW.KFSD.SV.W.0147.110701T1914Z-110701T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
214 PM CDT FRI JUL 1 2011

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN LAKE COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  NORTHWESTERN MCCOOK COUNTY IN SOUTHEAST SOUTH DAKOTA...
  EASTERN MINER COUNTY IN EAST CENTRAL SOUTH DAKOTA...

* UNTIL 300 PM CDT

* AT 214 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR
  SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
  LOCATED NEAR CANOVA...OR 21 MILES SOUTHWEST OF MADISON...AND MOVING
  NORTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  VILAS AROUND 225 PM CDT...
  WINFRED...HOWARD AND ORLAND AROUND 230 PM CDT...
  LAKE HERMAN STATE PARK AROUND 240 PM CDT...
  RAMONA AROUND 250 PM CDT...

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 4419 9761 4420 9703 4386 9718 4370 9759
TIME...MOT...LOC 1914Z 204DEG 32KT 4384 9744
WIND...HAIL 60MPH 1.25IN

$$

WEISSER

3 follow-up statements

640 
WWUS53 KFSD 011927
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
227 PM CDT FRI JUL 1 2011

SDC079-087-097-012000-
/O.CON.KFSD.SV.W.0147.000000T0000Z-110701T2000Z/
MINER SD-MCCOOK SD-LAKE SD-
227 PM CDT FRI JUL 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN
LAKE...NORTHWESTERN MCCOOK AND EASTERN MINER COUNTIES UNTIL 300 PM
CDT...

AT 227 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE HAIL UP TO HEN
EGG SIZE...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR CANOVA...OR 19 MILES SOUTHWEST OF MADISON...MOVING
NORTHEAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  VILAS AROUND 240 PM CDT...
  HOWARD AROUND 245 PM CDT...
  ORLAND AROUND 250 PM CDT...
  WINFRED AROUND 255 PM CDT...
  LAKE HERMAN STATE PARK AND RAMONA AROUND 300 PM CDT...

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.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR LARGE DESTRUCTIVE HAIL CAPABLE OF PRODUCING
SIGNIFICANT DAMAGE. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

&&

LAT...LON 4419 9761 4420 9703 4386 9718 4370 9759
TIME...MOT...LOC 1927Z 208DEG 18KT 4386 9741
WIND...HAIL 60MPH 2.00IN

$$

WEISSER

412 
WWUS53 KFSD 011953
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
253 PM CDT FRI JUL 1 2011

SDC087-097-012003-
/O.CAN.KFSD.SV.W.0147.000000T0000Z-110701T2000Z/
MINER SD-MCCOOK SD-
253 PM CDT FRI JUL 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MCCOOK AND
EASTERN MINER COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED EAST OF THE WARNED 
AREA.

LAT...LON 4419 9704 4386 9718 4385 9737 4419 9736
      4420 9704
TIME...MOT...LOC 1953Z 228DEG 29KT 4403 9710

$$

SDC079-012000-
/O.CON.KFSD.SV.W.0147.000000T0000Z-110701T2000Z/
LAKE SD-
253 PM CDT FRI JUL 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN LAKE
COUNTY UNTIL 300 PM CDT...

AT 253 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE HAIL UP TO HEN
EGG SIZE...AND DESTRUCTIVE WINDS IN EXCESS OF 80 MPH.  THIS STORM WAS
LOCATED NEAR MADISON...MOVING NORTHEAST AT 35 MPH.

THIS SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF WESTERN
LAKE COUNTY.

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.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR LARGE DESTRUCTIVE HAIL CAPABLE OF PRODUCING
SIGNIFICANT DAMAGE. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS IF YOU ARE IN
THE PATH OF THIS STORM. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

&&

LAT...LON 4419 9704 4386 9718 4385 9737 4419 9736
      4420 9704
TIME...MOT...LOC 1953Z 228DEG 29KT 4403 9710
WIND...HAIL 80MPH 2.00IN

$$

WEISSER

266 
WWUS53 KFSD 012001
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
301 PM CDT FRI JUL 1 2011

SDC079-012011-
/O.EXP.KFSD.SV.W.0147.000000T0000Z-110701T2000Z/
LAKE SD-
301 PM CDT FRI JUL 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN LAKE COUNTY HAS
EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA...HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS 
THUNDERSTORM...ESPECIALLY IN THE MADISON AND NUNDA LOCATIONS. THIS 
COMPLEX OF THUNDERSTORMS IS APPROACHING INTERSTATE 29.

LAT...LON 4419 9704 4386 9718 4385 9737 4419 9736
      4420 9704
TIME...MOT...LOC 1953Z 228DEG 29KT 4403 9710

$$

WEISSER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 10:07 PM CDT	Severe Thunderstorm Warning	FSD	Brule, Charles Mix, Gregory	38 min
Jun 30, 10:47 PM CDT	Severe Thunderstorm Warning	FSD	Brule	43 min
Jun 30, 11:38 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Douglas, Gregory	37 min
Jul 1, 12:10 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld	35 min
Jul 1, 12:40 PM CDT	Severe Thunderstorm Warning	FSD	Beadle	35 min
Jul 1, 1:11 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld	49 min
Jul 1, 2:18 PM CDT	Severe Thunderstorm Warning	FSD	Hutchinson, McCook, Turner	42 min
Jul 1, 2:42 PM CDT	Severe Thunderstorm Warning	FSD	Lake, McCook, Minnehaha, Moody	63 min
Jul 1, 3:13 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Minnehaha, Moody	62 min
Jul 1, 3:18 PM CDT	Tornado Warning	FSD	Moody	27 min
Jul 1, 3:31 PM CDT	Tornado Warning	FSD	Moody	29 min
Jul 1, 3:41 PM CDT	Flash Flood Warning	FSD	Brookings, Moody	100 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.