Alert archive / South Dakota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 90, NWS Sioux Falls, SD

May 5, 2012Pipestone County, Rock County, Minnesota; 4 counties in South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 5, 2012, 9:42 PM CDT for Pipestone County, Rock County, Minnesota; 4 counties in South Dakota. It was in force for 48 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, 9:42 PM CDT (02:42 UTC)
Expired: May 5, 2012, 10:30 PM CDT
In force: 48 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 80.0 mph

Counties Pipestone County, MN, Rock County, MN, Lake County, SD, McCook County, SD, Minnehaha County, SD, Moody County, SD

The radar

The Sioux Falls radar (KFSD), 52 km from the middle of the area, began a volume at 02:43 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, 9:57 PM CDT	TSTM WND GST 72	1 S Flandreau, SD
May 5, 10:29 PM CDT	TSTM WND DMG	7 Wnw Pipestone, MN	SEVERAL TREES DOWN AND CANOPY BLOWN OFF TRAILER
May 5, 10:29 PM CDT	TSTM WND DMG	Sw Flandreau, SD	NUMEROUS BUILDINGS AND TREES DAMAGED IN SOUTHWESTERN FLANDREAU. ROOFS ON APPARTMENT BUILDINGS DAMAGED. NO KNOWN INJURIES.

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, 6:46 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 2.7 hours before the alert went out and 176 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: 657 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 201 m²/s²
0-3 km storm-relative helicity: 278 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

544 
WUUS53 KFSD 060242
SVRFSD
MNC117-133-SDC079-087-099-101-060330-
/O.NEW.KFSD.SV.W.0090.120506T0242Z-120506T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
942 PM CDT SAT MAY 5 2012

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  PIPESTONE COUNTY IN SOUTHWEST MINNESOTA...
  NORTHERN ROCK COUNTY IN SOUTHWEST MINNESOTA...
  LAKE COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  NORTHEASTERN MCCOOK COUNTY IN SOUTHEAST SOUTH DAKOTA...
  NORTHERN MINNEHAHA COUNTY IN SOUTHEAST SOUTH DAKOTA...
  MOODY COUNTY IN EAST CENTRAL SOUTH DAKOTA...

* UNTIL 1030 PM CDT

* AT 942 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING MULTIPLE SEVERE THUNDERSTORMS CAPABLE OF PRODUCING HALF
  DOLLAR SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 80 MPH. 
  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM EGAN TO 6
  MILES SOUTHWEST OF WENTWORTH TO 6 MILES WEST OF ORLAND...AND MOVING
  NORTHEAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  JASPER AROUND 955 PM CDT...
  LAKE HERMAN STATE PARK AROUND 1000 PM CDT...
  HARDWICK...WENTWORTH...RAMONA AND MADISON AROUND 1010 PM CDT...
  TROSKY AROUND 1015 PM CDT...
  PIPESTONE NATIONAL MONUMENT AND PIPESTONE AROUND 1020 PM CDT...
  EDGERTON AROUND 1025 PM CDT...
  WARD...HOLLAND AND NUNDA AROUND 1030 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE SUPERCELL THUNDERSTORMS. DUE TO THE ROTATING NATURE OF THESE 
STORMS...THEY ARE CAPABLE OF PRODUCING ALL TYPES OF SEVERE WEATHER...
INCLUDING EXTREMELY LARGE HAIL...DESTRUCTIVE STRAIGHT LINE WINDS AND 
POSSIBLY TORNADOES. MOVE QUICKLY TO A SAFE SHELTER...PREFERABLY INTO 
AN INTERIOR ROOM...SUCH AS A BATHROOM OR A CLOSET...OR INTO A 
BASEMENT.

&&

LAT...LON 4419 9608 4377 9606 4369 9738 4415 9737
      4420 9626
TIME...MOT...LOC 0242Z 242DEG 19KT 4404 9664 4394 9701
          4392 9729
WIND...HAIL 80MPH 1.25IN

$$

JH

1 follow-up statement

998 
WWUS53 KFSD 060316
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1016 PM CDT SAT MAY 5 2012

MNC117-133-SDC079-087-099-101-060330-
/O.CON.KFSD.SV.W.0090.000000T0000Z-120506T0330Z/
PIPESTONE MN-ROCK MN-MOODY SD-MINNEHAHA SD-MCCOOK SD-LAKE SD-
1016 PM CDT SAT MAY 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR LAKE...
NORTHEASTERN MCCOOK...NORTHERN MINNEHAHA...MOODY...NORTHERN ROCK AND
PIPESTONE COUNTIES UNTIL 1030 PM CDT...

AT 1015 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING MULTIPLE SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WALNUT
SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 80 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES SOUTHEAST OF WARD TO
COLMAN TO 4 MILES OF SOUTHEAST OF MADISON...MOVING EAST AT 25 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  COLTON AND COLMAN AROUND 1020 PM CDT...
  CHESTER...WENTWORTH...NUNDA AND EGAN AROUND 1025 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE SUPERCELL THUNDERSTORMS. DUE TO THE ROTATING NATURE OF 
SUPERCELLS...THEY ARE CAPABLE OF PRODUCING ALL TYPES OF SEVERE 
WEATHER...INCLUDING EXTREMELY LARGE HAIL...DESTRUCTIVE STRAIGHT LINE 
WINDS AND POSSIBLY TORNADOES. BE PREPARED TO ACT QUICKLY SHOULD A 
TORNADO OCCUR OR A TORNADO WARNING BE ISSUED.

&&

LAT...LON 4419 9608 4377 9606 4369 9738 4415 9737
      4420 9626
TIME...MOT...LOC 0315Z 254DEG 21KT 4408 9637 4398 9674
          4397 9702
WIND...HAIL 80MPH 1.50IN

$$

JH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 5, 9:29 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln	46 min
May 5, 10:07 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Lyon	38 min
May 5, 10:28 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Lyon, Murray, Nobles, Pipestone, Rock	62 min
May 5, 11:25 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Lyon, Murray, Pipestone	65 min
May 6, 12:01 AM CDT	Flash Flood Warning	FSD	Lincoln, Lyon, Murray, Pipestone	4 hr
May 6, 12:28 AM CDT	Severe Thunderstorm Warning	FSD	Murray, Pipestone	47 min
May 6, 1:08 AM CDT	Areal Flood Warning	FSD	Lincoln, Lyon, Murray, Nobles, Pipestone, Rock	33 hr
May 6, 4:08 AM CDT	River Flood Warning	FSD	Pipestone	23 hr
May 6, 8:24 AM CDT	River Flood Warning	FSD	Lyon	71 hr
May 6, 6:58 PM CDT	River Flood Warning	FSD	Rock	3 days
May 5, 7:05 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, McCook, Miner	25 min
May 5, 7:29 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Lake, McCook, Miner, Sanborn	46 min
May 5, 7:30 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Kingsbury, Miner, Sanborn	45 min
May 5, 7:37 PM CDT	Flash Flood Warning	FSD	Davison, Hanson, Miner, Sanborn	7 hr
May 5, 7:41 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Kingsbury	36 min
May 5, 7:59 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Gregory	46 min
May 5, 8:11 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Lake, McCook, Miner, Minnehaha and 1 more	49 min
May 5, 8:16 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Kingsbury	29 min
May 5, 8:42 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Kingsbury	48 min
May 5, 8:46 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Charles Mix	44 min
May 5, 8:57 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Hanson, Lake, McCook, Miner, Minnehaha and 1 more	48 min
May 5, 9:05 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Kingsbury, Miner, Sanborn	25 min
May 5, 9:07 PM CDT	Flash Flood Warning	FSD	Lake, Miner	7 hr
May 5, 9:26 PM CDT	Severe Thunderstorm Warning	FSD	Kingsbury, Miner, Sanborn	23 min
May 5, 9:27 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule	28 min
May 5, 10:02 PM CDT	Severe Thunderstorm Warning	FSD	Kingsbury, Miner, Sanborn	28 min
May 5, 10:15 PM CDT	Flash Flood Warning	FSD	Moody	4 hr
May 5, 10:31 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Lake, Miner	29 min
May 5, 10:57 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Lake	33 min
May 5, 11:08 PM CDT	Severe Thunderstorm Warning	FSD	Hanson, Lake, McCook, Miner	37 min
May 5, 11:45 PM CDT	Severe Thunderstorm Warning	FSD	Lake, McCook, Miner, Minnehaha	45 min
May 6, 12:22 AM CDT	Severe Thunderstorm Warning	FSD	Lake, McCook, Minnehaha, Moody	38 min
May 6, 4:45 AM CDT	River Flood Warning	FSD	Brookings, Moody	29 hr
May 6, 4:45 AM CDT	River Flood Warning	FSD	Minnehaha, Moody	3 days
May 6, 4:45 AM CDT	River Flood Warning	FSD	Minnehaha	4 days
May 6, 4:45 AM CDT	River Flood Warning	FSD	Lincoln, Minnehaha	4 days
May 6, 4:45 AM CDT	River Flood Warning	FSD	Lincoln, Union	7 days
May 6, 4:45 AM CDT	River Flood Warning	FSD	Union	7 days
May 6, 8:24 AM CDT	River Flood Warning	FSD	McCook	4 days
May 6, 10:31 AM CDT	River Flood Warning	FSD	Davison, Hanson	7 days
May 6, 10:31 AM CDT	River Flood Warning	FSD	Hutchinson, Yankton	5 days
May 6, 10:31 AM CDT	River Flood Warning	FSD	Yankton	44 hr
May 6, 10:31 AM CDT	River Flood Warning	FSD	Turner	71 hr
May 6, 10:31 AM CDT	River Flood Warning	FSD	Turner	5 days
May 6, 10:31 AM CDT	River Flood Warning	FSD	Clay	7 days

Nearby

Severe Thunderstorm Warnings in South Dakota, 2012 Severe Thunderstorm Warnings in Minnesota, 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.