Alert archive / Indiana / Special Weather Statements in 2012

Special Weather Statement, NWS Louisville, KY

March 30, 2012Jefferson County, Indiana

NWS Louisville, KY issued this special weather statement at Mar 30, 2012, 8:18 PM EDT for Jefferson County, Indiana. It was in force for 27 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
Mar 30, 2012, 8:18 PM EDT (00:18 UTC)
Expired
Mar 30, 2012, 8:45 PM EDT
In force
27 min
Issued by
NWS Louisville, KY

County Jefferson County, IN

The radar

The Louisville radar (KLVX), 106 km from the middle of the area, began a volume at 00:18 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 0.3 hours before the alert went out and 152 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, Cncnati-Daytn, OH at 00:00Z on 2012-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 381 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 00:00Z on 2012-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 square meters per square second.19395878Sfc1 km3 km6 km9 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
381 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
1859 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
155 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Louisville, KY wrote its last area forecast discussion before this special weather statement went out at Mar 30, 7:02 PM EDT, 1 hour 16 minutes earlier.

Area forecast discussion, Mar 30, 7:02 PM EDT, 1 hour 16 minutes before
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Hazardous weather outlook, Mar 30, 4:19 PM EDT, 3 hours 59 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOUISVILLE KY
419 PM EDT FRI MAR 30 2012

INZ076>079-083-084-089>092-KYZ023>043-045>049-053>057-061>067-
070>078-081-082-312030-
ORANGE IN-WASHINGTON IN-SCOTT IN-JEFFERSON IN-DUBOIS IN-
CRAWFORD IN-PERRY IN-HARRISON IN-FLOYD IN-CLARK IN-HANCOCK KY-
BRECKINRIDGE KY-MEADE KY-OHIO KY-GRAYSON KY-HARDIN KY-BULLITT KY-
JEFFERSON KY-OLDHAM KY-TRIMBLE KY-HENRY KY-SHELBY KY-FRANKLIN KY-
SCOTT KY-HARRISON KY-SPENCER KY-ANDERSON KY-WOODFORD KY-
FAYETTE KY-BOURBON KY-NICHOLAS KY-NELSON KY-WASHINGTON KY-
MERCER KY-JESSAMINE KY-CLARK KY-LARUE KY-MARION KY-BOYLE KY-
GARRARD KY-MADISON KY-BUTLER KY-EDMONSON KY-HART KY-GREEN KY-
TAYLOR KY-CASEY KY-LINCOLN KY-LOGAN KY-WARREN KY-SIMPSON KY-
ALLEN KY-BARREN KY-MONROE KY-METCALFE KY-ADAIR KY-RUSSELL KY-
CUMBERLAND KY-CLINTON KY-
419 PM EDT FRI MAR 30 2012 /319 PM CDT FRI MAR 30 2012/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
INDIANA AND CENTRAL KENTUCKY.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A COLD FRONT LOCATED FROM CENTRAL ILLINOIS TO CENTRAL OHIO WILL
SLOWLY SAG SOUTHWARD TONIGHT. A LINE OF SHOWERS AND THUNDERSTORMS
AHEAD OF THE COLD FRONT IS EXPECTED TO MOVE ACROSS SOUTHERN
INDIANA AND PORTIONS OF NORTHERN KENTUCKY THIS EVENING. SOME OF
THESE STORMS MAY BE STRONG TO SEVERE WITH DAMAGING WINDS...LARGE
HAIL AND DANGEROUS CLOUD TO GROUND LIGHTNING BEING THE PRIMARY
SEVERE WEATHER THREATS. AS THE LINE DROPS SOUTH INTO KENTUCKY LATE
TONIGHT...IT IS EXPECTED TO WEAKEN IN INTENSITY.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

ISOLATED TO SCATTERED STORMS WILL RETURN TO THE FORECAST AREA EARLY
MONDAY THROUGH WEDNESDAY...AS ANOTHER STORM SYSTEM COMBINES WITH
OUR WARM AND MOIST AIR MASS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED TONIGHT.

MJ/BJS

In the hours before

Local storm report, Mar 30, 3:41 PM EDT, 4 hours 37 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
341 PM EDT FRI MAR 30 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0338 PM     HAIL             LEBANON                 37.57N  85.25W
03/30/2012  E0.88 INCH       MARION             KY   CO-OP OBSERVER

&&

EVENT NUMBER LMK1200490

MRC
Special weather statement, Mar 30, 8:18 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
818 PM EDT FRI MAR 30 2012

INZ079-310045-
JEFFERSON-
818 PM EDT FRI MAR 30 2012

...STRONG THUNDERSTORM WITH DANGEROUS LIGHTNING...HEAVY RAIN...HALF
INCH HAIL...AND 40 MPH WINDS...

AT 713 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 9 MILES EAST OF VERNON...AND MOVING SOUTHEAST AT
30 MPH.

FREQUENT CLOUD TO GROUND LIGHTNING...HEAVY RAIN WITH RAINFALL RATES
OF AROUND ONE INCH PER HOUR REDUCING VISIBILITIES TO LESS THAN ONE
MILE...PEA SIZE TO HALF INCH HAIL...AND GUSTY WINDS OF AROUND 35 TO
40 MPH...ARE EXPECTED WITH THIS STORM.

* THIS STORM WILL ALSO IMPACT...
  MADISON...
  BRYANTSBURG AND BELLEVIEW...
  CANAAN AND BARBERSVILLE...
  CHINA AND MANVILLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER INDOORS AND STAY
AWAY FROM WINDOWS. STAY TUNED TO NOAA ALL HAZARDS RADIO...
WEATHER.GOV/LOUISVILLE ON THE INTERNET...OR LOCAL MEDIA FOR LATER
UPDATES AND POSSIBLE WARNINGS.

&&

LAT...LON 3891 8520 3878 8520 3873 8533 3874 8542
      3872 8545 3869 8546 3868 8547 3890 8555
      3891 8554 3892 8554 3892 8521
TIME...MOT...LOC 0018Z 320DEG 24KT 3899 8542

AMS

The office that day

Everything else NWS Louisville, KY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 30, 10:41 PM EDTSpecial Weather StatementLMKTrimble34 min
Mar 31, 12:43 AM EDTSpecial Weather StatementLMKOhio32 min
Mar 31, 4:25 AM EDTSpecial Weather StatementLMKBreckinridge35 min
Mar 31, 4:36 AM EDTSevere Thunderstorm WarningLMKBreckinridge24 min
Mar 30, 8:35 PM EDTSpecial Weather StatementLMKOrange25 min
Mar 30, 8:56 PM EDTSpecial Weather StatementLMKDubois, Orange, Washington34 min
Mar 30, 9:13 PM EDTSevere Thunderstorm WarningLMKWashington32 min
Mar 30, 9:34 PM EDTSpecial Weather StatementLMKClark, Crawford, Dubois, Floyd, Harrison41 min
Mar 30, 9:39 PM EDTSpecial Weather StatementLMKFloyd36 min
Mar 30, 9:45 PM EDTSpecial Weather StatementLMKJefferson, Scott45 min

Nearby

Special Weather Statements in Indiana, 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.