000
WTNT44 KNHC 241159
TCDAT4

TROPICAL STORM DEBBY SPECIAL DISCUSSION NUMBER   4
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL042012
700 AM CDT SUN JUN 24 2012

THE PURPOSE OF THIS SPECIAL ADVISORY IS TO ISSUE A TROPICAL STORM
WARNING FROM THE MISSISSIPPI ALABAMA BORDER EASTWARD TO THE
OCHOLOCKONEE RIVER. THIS IS BASED ON THE EXPANSION OF TROPICAL
STORM FORCE WINDS IN THE NORTHEAST QUADRANT. THERE HAVE BEEN NO
CHANGES TO THE FORECAST TRACK NOR INTENSITY.


FORECAST POSITIONS AND MAX WINDS

INIT  24/1200Z 27.5N  87.0W   50 KT  60 MPH
 12H  24/1800Z 27.5N  87.4W   50 KT  60 MPH
 24H  25/0600Z 27.9N  87.8W   50 KT  60 MPH
 36H  25/1800Z 28.2N  88.4W   55 KT  65 MPH
 48H  26/0600Z 28.3N  89.0W   60 KT  70 MPH
 72H  27/0600Z 28.5N  90.5W   65 KT  75 MPH
 96H  28/0600Z 28.5N  92.0W   70 KT  80 MPH
120H  29/0600Z 28.5N  93.5W   70 KT  80 MPH

$$
FORECASTER AVILA

000
WTNT44 KNHC 242034
TCDAT4

TROPICAL STORM DEBBY DISCUSSION NUMBER   6
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL042012
400 PM CDT SUN JUN 24 2012

THERE HAS BEEN A SIGNIFICANT CHANGE IN THE FORECAST TRACK WITH THIS
ADVISORY. THE OFFICIAL FORECAST NO LONGER BRINGS DEBBY WESTWARD
ALONG THE NORTHERN GULF OF MEXICO AND INSTEAD KEEPS THE CYCLONE
MEANDERING OVER THE NORTHEASTERN GULF FOR THE NEXT 3 TO 4 DAYS.
THIS FORECAST IS A COMPROMISE BETWEEN THE CONSISTENT EASTWARD
SOLUTION PROVIDED BY THE GFS FOR THE PAST SEVERAL DAYS AND THE NEW
TWIST OF THE ECMWF. THE ECMWF MODEL...WHICH HAS BEEN
FORECASTING DEBBY TO MOVE WESTWARD ALONG THE GULF OF MEXICO... NOW
HAS THE CYCLONE MEANDERING FOR THE NEXT 3 DAYS OVER THE
NORTHEASTERN GULF. SINCE THESE TWO RELIABLE MODELS ARE IN
MARGINALLY BETTER AGREEMENT...I AM A LITTLE MORE CONFIDENT...BUT
NOT COMPLETELY...THAT DEBBY IS NOT GOING TO TURN WESTWARD OVER THE
GULF. HOWEVER...NEW OFFICIAL TRACK REMAINS A LOW-CONFIDENCE
FORECAST.

DEBBY IS A SPRAWLING SYSTEM...WITH MOST OF THE THUNDERSTORM ACTIVITY
IN A CURVED BAND WELL REMOVED FROM THE CENTER.  DATA FROM THE
RECONNAISSANCE PLANE A FEW HOURS AGO INDICATE THAT THE INITIAL
INTENSITY REMAINS 50 KNOTS. THE SHEAR IS NOT EXPECTED TO CHANGE
MUCH FOR THE NEXT DAY OR SO...BUT BECAUSE DEBBY IS FORECAST TO
REMAIN OVER WATER...THERE WILL BE SOME OPPORTUNITY FOR A SLIGHT
STRENGTHENING BEFORE THE CENTER MOVES INLAND. HOWEVER...THE CYCLONE
WILL LOCATED BE NORTH OF THE AREA OF HIGH OCEANIC HEAT CONTENT AND
THE UPWELLING COULD HALT THE INTENSIFICATION.


FORECAST POSITIONS AND MAX WINDS

INIT  24/2100Z 28.4N  85.8W   50 KT  60 MPH
 12H  25/0600Z 28.7N  85.5W   50 KT  60 MPH
 24H  25/1800Z 29.0N  85.5W   50 KT  60 MPH
 36H  26/0600Z 29.0N  85.5W   55 KT  65 MPH
 48H  26/1800Z 29.0N  85.5W   60 KT  70 MPH
 72H  27/1800Z 29.5N  85.5W   60 KT  70 MPH
 96H  28/1800Z 30.0N  85.5W   40 KT  45 MPH
120H  29/1800Z 30.5N  85.5W   30 KT  35 MPH...INLAND

$$
FORECASTER AVILA