Alert archive / Minnesota / Special Weather Statements in 2012

Special Weather Statement, NWS Twin Cities, MN

July 6, 2012Le Sueur County, Minnesota

NWS Twin Cities, MN issued this special weather statement at Jul 6, 2012, 7:28 PM CDT for Le Sueur County, Minnesota. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 6, 2012, 7:28 PM CDT (00:28 UTC)
Expired
Jul 6, 2012, 8:00 PM CDT
In force
32 min
Issued by
NWS Twin Cities, MN

County Le Sueur County, MN

The radar

The Minneapolis radar (KMPX), 48 km from the middle of the area, began a volume at 00:29 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.5 hours before the alert went out and 47 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2012-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1097 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2012-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.1939Sfc1 km3 km6 kmRMLM
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
1097 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
1600 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
37 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.

380 
WWUS83 KMPX 070028
SPSMPX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
728 PM CDT FRI JUL 6 2012

MNZ067-075-076-070100-
LE SUEUR-NICOLLET-SIBLEY-
728 PM CDT FRI JUL 6 2012

AT 724 PM CDT...WEATHER SERVICE RADAR WAS TRACKING A STRONG
THUNDERSTORM NEAR HENDERSON. THIS STORM WAS MOVING EAST AT 25 MPH.

WINDS UP TO 50 MPH ARE EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  HENDERSON.
  ST THOMAS.
  ST HENRY.
  LE CENTER.
  HEIDELBERG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR THE AREA.

&&

LAT...LON 4447 9405 4455 9395 4452 9352 4427 9353
TIME...MOT...LOC 0028Z 286DEG 21KT 4451 9392

$$

JRB

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 9:39 PM CDTSevere Thunderstorm WarningMPXMeeker, Wright36 min
Jul 6, 10:40 PM CDTSpecial Weather StatementMPXCarver65 min
Jul 6, 10:45 PM CDTSpecial Weather StatementMPXRamsey60 min
Jul 6, 11:00 PM CDTSpecial Weather StatementMPXWashington45 min
Jul 6, 7:29 PM CDTSpecial Weather StatementMPXRusk46 min
Jul 6, 11:48 PM CDTSpecial Weather StatementMPXDunn42 min
Jul 6, 11:49 PM CDTSpecial Weather StatementMPXRusk41 min

Nearby

Special Weather Statements in Minnesota, 2012Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.