Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 97, NWS Sioux Falls, SD

May 5, 20124 counties in Minnesota; Brookings County, Lake County, Moody County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 5, 2012, 11:25 PM CDT for 4 counties in Minnesota; Brookings County, Lake County, Moody County, South Dakota. It was in force for 65 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 5, 2012, 11:25 PM CDT (04:25 UTC)
Expired: May 6, 2012, 12:30 AM CDT
In force: 65 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 70.0 mph

Counties Lincoln County, MN, Lyon County, MN, Murray County, MN, Pipestone County, MN, Brookings County, SD, Lake County, SD, Moody County, SD

The radar

The Sioux Falls radar (KFSD), 73 km from the middle of the area, began a volume at 04:29 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, 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, 4.4 hours before the alert went out and 193 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.

130 
WUUS53 KFSD 060425
SVRFSD
MNC081-083-101-117-SDC011-079-101-060530-
/O.NEW.KFSD.SV.W.0097.120506T0425Z-120506T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1125 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...
  WESTERN MURRAY COUNTY IN SOUTHWEST MINNESOTA...
  PIPESTONE COUNTY IN SOUTHWEST MINNESOTA...
  SOUTHEASTERN BROOKINGS COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  EASTERN LAKE COUNTY IN EAST CENTRAL SOUTH DAKOTA...
  MOODY COUNTY IN EAST CENTRAL SOUTH DAKOTA...

* UNTIL 1230 AM CDT

* AT 1124 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING MULTIPLE SEVERE THUNDERSTORMS CAPABLE OF PRODUCING HALF
  DOLLAR SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. 
  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM PIPESTONE
  NATIONAL MONUMENT TO EGAN TO WENTWORTH...AND MOVING EAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  EDGERTON AROUND 1135 PM CDT...
  WOODSTOCK AROUND 1145 PM CDT...
  FLANDREAU AROUND 1150 PM CDT...
  LAKE WILSON AND CHANDLER AROUND 1205 AM CDT...
  HOLLAND AROUND 1210 AM CDT...
  CURRENT LAKE...WARD AND LAKE SHETEK STATE PARK AROUND 1230 AM
  CDT...

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 4436 9559 4386 9571 4385 9713 4420 9707
TIME...MOT...LOC 0424Z 255DEG 18KT 4406 9627 4402 9660
          4400 9693
WIND...HAIL 70MPH 1.25IN

$$

JH

1 follow-up statement

656 
WWUS53 KFSD 060449
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1149 PM CDT SAT MAY 5 2012

MNC081-083-101-117-SDC011-079-101-060530-
/O.CON.KFSD.SV.W.0097.000000T0000Z-120506T0530Z/
LINCOLN MN-LYON MN-MURRAY MN-PIPESTONE MN-MOODY SD-LAKE SD-
BROOKINGS SD-
1149 PM CDT SAT MAY 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
BROOKINGS...EASTERN LAKE...MOODY...PIPESTONE...WESTERN MURRAY...
SOUTHERN LYON AND SOUTHERN LINCOLN COUNTIES UNTIL 1230 AM CDT...

AT 1148 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM HOLLAND TO 7 MILES NORTHWEST
OF PIPESTONE NATIONAL MONUMENT TO NEAR COLMAN...MOVING EAST AT 20 
MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  FLANDREAU AROUND MIDNIGHT CDT...
  LAKE WILSON AROUND 1205 AM CDT...
  HOLLAND AROUND 1215 AM CDT...
  CURRENT LAKE...WARD...LAKE SHETEK STATE PARK AND CURRIE AROUND 1230
  AM 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 4436 9559 4386 9571 4385 9713 4420 9707
TIME...MOT...LOC 0448Z 255DEG 18KT 4409 9611 4405 9644
          4403 9674
WIND...HAIL 60MPH 1.00IN

$$

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, 10:28 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Lyon, Murray, Nobles, Pipestone, Rock	62 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.