Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 131, NWS Twin Cities, MN

June 10, 2012Blue Earth County, Le Sueur County, Nicollet County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 10, 2012, 7:35 PM CDT for Blue Earth County, Le Sueur County, Nicollet County, Minnesota. It was in force for 40 min. 2 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: Jun 10, 2012, 7:35 PM CDT (00:35 UTC)
Expired: Jun 10, 2012, 8:15 PM CDT
In force: 40 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Blue Earth County, MN, Le Sueur County, MN, Nicollet County, MN

The radar

The Minneapolis radar (KMPX), 89 km from the middle of the area, began a volume at 00:37 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
Jun 10, 7:35 PM CDT	TSTM WND DMG	Lake Crystal, MN	DELAYED REPORT. SPORADIC TREE DAMAGE ACROSS LAKE CRYSTAL INCLUDING UP TO 10 INCH DIAMETER BRANCHES DOWN. IN ADDITION, BLEACHERS WERE DAMAGED AT A CITY PARK.
Jun 10, 7:52 PM CDT	TSTM WND DMG	4 Se Lake Crystal, MN	LARGE BRANCHES DOWN.

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
Jun 10, 3:03 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.6 hours before the alert went out and 88 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: 282 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 2269 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 178 m²/s²
0-3 km storm-relative helicity: 273 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

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

706 
WUUS53 KMPX 110035
SVRMPX
MNC013-079-103-110115-
/O.NEW.KMPX.SV.W.0131.120611T0035Z-120611T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
735 PM CDT SUN JUN 10 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHERN LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHEASTERN NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 815 PM CDT

* AT 732 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING DAMAGING WINDS OF 60 MPH. THIS STORM WAS LOCATED 6 MILES
  NORTHWEST OF VERNON CENTER...OR ABOUT 17 MILES SOUTHWEST OF
  MANKATO...AND MOVING NORTHEAST AT 40 MPH.  NICKEL SIZE HAIL MAY
  ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IN THE WARNING INCLUDE...
  MANKATO...
  ST PETER...
  VERNON CENTER...
  AMBOY...
  MAPLETON...
  GOOD THUNDER...
  PEMBERTON...
  NORTH MANKATO...
  NICOLLET...
  ST CLAIR...
  EAGLE LAKE...
  KASOTA...
  CLEVELAND...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4414 9437 4437 9422 4437 9365 4419 9377
      4386 9379 4385 9435
TIME...MOT...LOC 0035Z 221DEG 37KT 4404 9423
WIND...HAIL 60MPH 0.88IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 7:07 PM CDT	Special Weather Statement	MPX	Le Sueur, Nicollet, Scott, Sibley	53 min
Jun 10, 7:35 PM CDT	Special Weather Statement	MPX	Anoka, Chisago, Hennepin, Isanti, Kanabec, Ramsey	55 min
Jun 10, 7:41 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin, Scott	49 min
Jun 10, 7:54 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Hennepin, Isanti	36 min
Jun 10, 7:55 PM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Nicollet, Scott, Sibley	50 min
Jun 10, 7:59 PM CDT	Severe Thunderstorm Warning	MPX	Carver, McLeod, Wright	46 min
Jun 10, 8:18 PM CDT	Tornado Warning	MPX	Carver, Le Sueur, Scott, Sibley	42 min
Jun 10, 8:29 PM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Scott, Steele	45 min
Jun 10, 8:32 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Hennepin, Isanti, Ramsey, Washington	58 min
Jun 10, 8:39 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Sibley	36 min
Jun 10, 8:42 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Rice	63 min
Jun 10, 8:48 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn, Steele, Waseca	36 min
Jun 10, 8:50 PM CDT	Special Weather Statement	MPX	Isanti	40 min
Jun 10, 9:29 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Isanti, Washington	61 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.