Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 93, NWS Sioux Falls, SD

May 5, 20126 counties in Minnesota; Lake County, Minnehaha County, Moody County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 5, 2012, 10:28 PM CDT for 6 counties in Minnesota; Lake County, Minnehaha County, Moody County, South Dakota. It was in force for 62 min. 6 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, 10:28 PM CDT (03:28 UTC)
Expired: May 5, 2012, 11:30 PM CDT
In force: 62 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.5 in
Wind: 80.0 mph

Counties Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Lake County, SD, Minnehaha County, SD, Moody County, SD

The radar

The Sioux Falls radar (KFSD), 63 km from the middle of the area, began a volume at 03:29 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, 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.
May 5, 10:40 PM CDT	TSTM WND GST 65	4 Se Lake Benton, MN	NUMEROUS BRANCHES DOWN
May 5, 10:42 PM CDT	HAIL 1	Lake Benton, MN
May 5, 11:22 PM CDT	TSTM WND DMG	3 Sse Flandreau, SD	BILLBOARD SIGN WITH METAL FRAME COMPLETELY FLATTENED AT NORTHWEST CORNER OF HIGHWAY 34 AND HIGHWAY 13 ACROSS FROM FLANDREAU AIRPORT
May 5, 11:30 PM CDT	TSTM WND GST 60	2 Ene Wentworth, SD	SEVERAL BRANCHES DOWN. ALSO ONE HALF INCH SIZE HAIL COVERED THE GROUND.

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
May 5, 10:03 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 3.5 hours before the alert went out and 192 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.

073 
WUUS53 KFSD 060328
SVRFSD
MNC081-083-101-105-117-133-SDC079-099-101-060430-
/O.NEW.KFSD.SV.W.0093.120506T0328Z-120506T0430Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1028 PM CDT SAT MAY 5 2012

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN LINCOLN COUNTY IN SOUTHWEST MINNESOTA...
  SOUTHERN LYON COUNTY IN SOUTHWEST MINNESOTA...
  MURRAY COUNTY IN SOUTHWEST MINNESOTA...
  NORTHWESTERN NOBLES COUNTY IN SOUTHWEST MINNESOTA...
  PIPESTONE COUNTY IN SOUTHWEST MINNESOTA...
  NORTHERN ROCK COUNTY IN SOUTHWEST MINNESOTA...
  EASTERN LAKE COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  NORTHERN MINNEHAHA COUNTY IN SOUTHEAST SOUTH DAKOTA...
  MOODY COUNTY IN EAST CENTRAL SOUTH DAKOTA...

* UNTIL 1130 PM CDT

* AT 1026 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 NORTHWEST
  OF HOLLAND TO EGAN TO WENTWORTH...AND MOVING EAST AT 25 MPH.

  LOCATIONS NORTH OF A LINE FROM EGAN SOUTH DAKOTA...TO RUTHTON
  MINNESOTA...TO TRACY MINNESOTA WILL BE MORE LIKELY TO SEE LARGE
  HAIL...WHILE DAMAGING WINDS ARE A GREATER THREAT IN AREAS
  FARTHER TO THE SOUTH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  COLMAN AND BALTIC AROUND 1040 PM CDT...
  DELL RAPIDS AROUND 1045 PM CDT...
  RUTHTON...TYLER AND HOLLAND AROUND 1050 PM CDT...
  TRENT AND FLORENCE AROUND 1055 PM CDT...
  EGAN AROUND 1100 PM CDT...
  FLANDREAU AROUND 1105 PM CDT...
  BALATON AND CURRENT LAKE AROUND 1115 PM CDT...
  JASPER AROUND 1120 PM CDT...

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
GARVIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A SUPERCELL THUNDERSTORM. 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 4378 9559 4373 9713 4420 9707 4419 9648
      4420 9645 4427 9645 4433 9558
TIME...MOT...LOC 0326Z 253DEG 22KT 4414 9629 4402 9665
          4399 9694
WIND...HAIL 80MPH 1.50IN

$$

JH

1 follow-up statement

668 
WWUS53 KFSD 060410
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1110 PM CDT SAT MAY 5 2012

MNC081-083-101-105-117-133-SDC079-099-101-060430-
/O.CON.KFSD.SV.W.0093.000000T0000Z-120506T0430Z/
LINCOLN MN-LYON MN-MURRAY MN-NOBLES MN-PIPESTONE MN-ROCK MN-MOODY SD-
MINNEHAHA SD-LAKE SD-
1110 PM CDT SAT MAY 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
LAKE...NORTHERN MINNEHAHA...MOODY...NORTHERN ROCK...PIPESTONE...
NORTHWESTERN NOBLES...MURRAY...SOUTHERN LYON AND SOUTHERN LINCOLN
COUNTIES UNTIL 1130 PM CDT...

AT 1109 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A LINE OF 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 TYLER TO 5 MILES
NORTHWEST OF PIPESTONE NATIONAL MONUMENT TO EGAN TO MADISON...MOVING
EAST AT 20 MPH.

LOCATIONS NORTH OF A LINE FROM WENTWORTH AND EGAN SOUTH DAKOTA...TO 
HOLLAND AND TRACY MINNESOTA...WILL BE MORE LIKELY TO SEE LARGE   
HAIL...WHILE DAMAGING WINDS ARE A GREATER THREAT IN AREAS FARTHER TO 
THE SOUTH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  WENTWORTH AND CHESTER AROUND 1115 PM CDT...
  FLORENCE AROUND 1125 PM CDT...
  CURRENT LAKE AROUND 1130 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 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 4378 9559 4373 9713 4420 9707 4419 9648
      4420 9645 4427 9645 4433 9558
TIME...MOT...LOC 0409Z 254DEG 18KT 4423 9614 4408 9635
          4405 9670 4403 9702
WIND...HAIL 80MPH 1.25IN

$$

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, 9:42 PM CDT	Severe Thunderstorm Warning	FSD	Pipestone, Rock	48 min
May 5, 10:07 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Lyon	38 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 Minnesota, 2012 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.