Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 26, NWS Twin Cities, MN

May 2, 2012Goodhue County, Rice County, Steele County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 2, 2012, 6:45 PM CDT for Goodhue County, Rice County, Steele County, Minnesota. It was in force for 60 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 2, 2012, 6:45 PM CDT (23:45 UTC)
Expired: May 2, 2012, 7:45 PM CDT
In force: 60 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Goodhue County, MN, Rice County, MN, Steele County, MN

The radar

The Minneapolis radar (KMPX), 92 km from the middle of the area, began a volume at 23:47 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 2, 7:00 PM CDT	HAIL 0.88	6 Wnw West Concord, MN	MULTIPLE REPORTS OF PEA TO NICKEL SIZE HAIL COVERING THE GROUND ACROSS FAR NORTHWEST DODGE COUNTY.

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 2, 5:25 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.8 hours before the alert went out and 94 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: 4 J/kg
Mixed-layer CIN: -280 J/kg
Mixed-layer LCL: 847 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 109 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.

361 
WUUS53 KMPX 022345
SVRMPX
MNC049-131-147-030045-
/O.NEW.KMPX.SV.W.0026.120502T2345Z-120503T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
645 PM CDT WED MAY 2 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN GOODHUE COUNTY IN SOUTHEAST MINNESOTA...
  EXTREME SOUTHEASTERN RICE COUNTY IN SOUTH CENTRAL MINNESOTA...
  NORTHEASTERN STEELE COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 745 PM CDT

* AT 642 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING HALF DOLLAR SIZE HAIL AND DAMAGING WINDS OF 60 MPH. THIS
  STORM WAS LOCATED 6 MILES EAST OF OWATONNA...AND MOVING NORTHEAST
  AT 20 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MEDFORD...
  BIXBY...
  WANAMINGO...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH AND LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4393 9307 4417 9328 4432 9279 4421 9280
      4419 9284 4419 9304 4407 9304
TIME...MOT...LOC 2345Z 232DEG 19KT 4412 9309
WIND...HAIL 60MPH 1.25IN

$$

1 follow-up statement

289 
WWUS53 KMPX 030013
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
713 PM CDT WED MAY 2 2012

MNC131-147-030028-
/O.CAN.KMPX.SV.W.0026.000000T0000Z-120503T0045Z/
RICE MN-STEELE MN-
713 PM CDT WED MAY 2 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN STEELE AND
SOUTHEASTERN RICE COUNTIES IS CANCELLED...

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

LAT...LON 4419 9304 4424 9304 4432 9279 4421 9280
      4419 9284
TIME...MOT...LOC 0013Z 232DEG 19KT 4421 9292

$$

MNC049-030045-
/O.CON.KMPX.SV.W.0026.000000T0000Z-120503T0045Z/
GOODHUE MN-
713 PM CDT WED MAY 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
GOODHUE COUNTY UNTIL 745 PM CDT...

AT 710 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR WEST
CONCORD...OR 13 MILES NORTH OF DODGE CENTER...MOVING NORTHEAST AT 20
MPH.

LOCATIONS IMPACTED INCLUDE...
  BOMBAY AND WANAMINGO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4419 9304 4424 9304 4432 9279 4421 9280
      4419 9284
TIME...MOT...LOC 0013Z 232DEG 19KT 4421 9292
WIND...HAIL 60MPH 1.25IN

$$

JRB

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 1, 7:08 PM CDT	Severe Thunderstorm Warning	MPX	Sherburne, Stearns, Wright	52 min
May 1, 7:23 PM CDT	Special Weather Statement	MPX	Isanti, Kanabec	52 min
May 1, 7:24 PM CDT	Severe Thunderstorm Warning	MPX	Carver, McLeod, Sibley	51 min
May 1, 7:30 PM CDT	Severe Thunderstorm Warning	MPX	Chisago, Isanti, Kanabec	45 min
May 1, 7:55 PM CDT	Special Weather Statement	MPX	Anoka	50 min
May 1, 8:08 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Isanti	37 min
May 1, 8:09 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Nicollet, Sibley	66 min
May 1, 8:13 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood	25 min
May 1, 9:24 PM CDT	Special Weather Statement	MPX	Nicollet, Sibley	51 min
May 1, 10:11 PM CDT	Special Weather Statement	MPX	Blue Earth, Faribault, Le Sueur, Martin, Nicollet	49 min
May 1, 11:12 PM CDT	Special Weather Statement	MPX	Freeborn, Rice, Steele, Waseca	48 min
May 2, 5:22 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Watonwan	53 min
May 2, 5:50 PM CDT	Tornado Warning	MPX	Blue Earth, Brown, Nicollet, Watonwan	40 min
May 2, 6:20 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Le Sueur, Nicollet, Waseca	55 min
May 2, 6:45 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood	60 min
May 2, 6:58 PM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Rice, Steele, Waseca	47 min

Nearby

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.