FXCN31 CWHX 291800
TROPICAL CYCLONE TECHNICAL INFORMATION STATEMENT ISSUED BY THE 
CANADIAN HURRICANE CENTRE OF ENVIRONMENT CANADA AT 3.00 PM ADT
MONDAY 29 AUGUST 2011.

THE NEXT STATEMENT WILL BE ISSUED BY 9.00 PM ADT

1. CURRENT POSITION, STRENGTH, CENTRAL PRESSURE AND MOTION

AT 3.00 PM ADT, POST-TROPICAL STORM IRENE WAS LOCATED NEAR
LATITUDE 51.0 N AND LONGITUDE 65.5 W , ABOUT 55 NAUTICAL MILES
OR 100 KM NORTH NORTHEAST OF SEPT ILES. MAXIMUM SUSTAINED
WINDS ARE ESTIMATED AT 50 KNOTS ( 93 KM/H ) AND CENTRAL
PRESSURE AT 987 MB. IRENE IS MOVING NORTHEAST AT 25 KNOTS ( 46
KM/H ).

2. FORECAST POSITION, CENTRAL PRESSURE AND STRENGTH

DATE     TIME     LAT    LON   MSLP  MAX WIND
          ADT                    MB  KTS  KMH
AUG 29  3.00 PM  51.0N  65.5W   987   50   93 POST-TROPICAL
AUG 30  3.00 AM  54.0N  59.0W   988   45   83 POST-TROPICAL
AUG 30  3.00 PM  55.8N  52.9W   988   45   83 POST-TROPICAL
AUG 31  3.00 AM  57.5N  46.1W   988   45   83 POST-TROPICAL

3. TECHNICAL DISCUSSION

A. ANALYSIS
POST-TROPICAL STORM IRENE HAS ALMOST FULLY COMPLETED TRANSFORMATION 
INTO A PURELY BAROCLINIC SYSTEM. THERE IS CLEAR ELONGATION AND 
FRONTAL TROUGHING OF THE PRESSURE PATTERN AHEAD OF THE STORM, WITH A 
TIGHTENING OF THE PRESSURE GRADIENT BEHIND IT. STRONG AND GUSTY
WINDS ARE STILL OCCURRING WELL SOUTHEAST OF THE STORM TRACK, AND
WITH THE INCREASED BAROCLINICITY A SECOND WIND MAXIMUM IS DEVELOPING 
BEHIND THE SYSTEM. INITIAL MOTION IS TOWARD THE NORTHEAST AT 25 
KNOTS.


B. PROGNOSTIC
NO CHANGE TO PREVIOUS TRACK OR INTENSITY REASONING. WITH IRENE
NOW A NEARLY PURE BAROCLINIC SYSTEM, THE LAST FEW RUNS OF GLOBAL 
DYNAMICAL MODELS HAVE GOTTEN AN INCREASINGLY BETTER HANDLE ON THE 
PRESSURE, WIND AND PRECIPITATION FIELDS. THE CURRENT TRACK PRETTY 
MUCH FOLLOWS THE LATEST GEM-REGIONAL RUN. AS SUCH, THIS WILL LIKELY 
BE THE LAST TRACK AND TECHNICAL INFORMATION STATEMENT ON IRENE
FROM THE CHC.

NOTE THAT THIS SYSTEM MAY REINTENSIFY SLIGHTLY AS IT CROSSES THE 
LABRADOR SEA ON TUESDAY WITH THE POSSIBILITY OF STORM FORCE WINDS
IN THE TIGHTENING GRADIENT IN THE SOUTHWESTERN HALF OF THE LOW.


C. PREDICTED WIND RADII (NM)

TIME          GALES           STORMS            HURRICANE
         NE  SE  SW  NW    NE  SE  SW  NW    NE  SE  SW  NW
29/18Z  210 335 160  85    75  95  25   5     0   0   0   0
30/06Z  200 335 175  75     0   0   0   0     0   0   0   0
30/18Z  190 330 180  75     0   0   0   0     0   0   0   0
31/06Z  180 320 180  75     0   0   0   0     0   0   0   0

END/BORGEL