WOCN31 CWHX 071200
POST-TROPICAL STORM HANNA INFORMATION STATEMENT ISSUED BY THE
CANADIAN HURRICANE CENTRE OF ENVIRONMENT CANADA AT 9.00 AM ADT
SUNDAY 07 SEPTEMBER 2008.
THE NEXT STATEMENT WILL BE ISSUED BY 12.00 PM ADT
... POST-TROPICAL STORM HANNA TO CROSS THE MARITIMES
TODAY AND NEWFOUNDLAND TONIGHT...
1. CURRENT POSITION, STRENGTH, CENTRAL PRESSURE AND MOTION
AT 9.00 AM ADT... POST-TROPICAL STORM HANNA WAS LOCATED NEAR
LATITUDE 42.9 N AND LONGITUDE 68.7 W... ABOUT 80 NAUTICAL MILES
OR 155 KM EAST SOUTHEAST OF PORTLAND . MAXIMUM SUSTAINED WINDS
ARE ESTIMATED AT 45 KNOTS... 83 KM/H... AND CENTRAL PRESSURE AT 995
MB. HANNA IS MOVING NORTHEAST AT 39 KNOTS... 72 KM/H.
2. FORECAST POSITION, CENTRAL PRESSURE AND STRENGTH
DATE TIME LAT LON MSLP MAX WIND
ADT MB KTS KMH
SEP 07 9.00 AM 42.9N 68.7W 995 45 83 POST-TROPICAL
SEP 07 3.00 PM 45.4N 64.5W 996 45 83 POST-TROPICAL
SEP 07 9.00 PM 46.8N 60.8W 996 45 83 POST-TROPICAL
SEP 08 3.00 AM 47.9N 57.0W 996 45 83 POST-TROPICAL
SEP 08 9.00 AM 48.9N 53.3W 994 45 83 POST-TROPICAL
SEP 08 3.00 PM 49.5N 50.9W 991 45 83 POST-TROPICAL
SEP 08 9.00 PM 50.3N 48.8W 988 45 83 POST-TROPICAL
SEP 09 3.00 AM 51.3N 44.6W 985 50 93 POST-TROPICAL
SEP 09 9.00 AM 52.2N 40.2W 984 50 93 POST-TROPICAL
SEP 09 3.00 PM 53.2N 35.2W 984 50 93 POST-TROPICAL
SEP 09 9.00 PM 54.2N 30.2W 984 50 93 POST-TROPICAL
3. PUBLIC WEATHER IMPACTS AND WARNINGS SUMMARY
POST-TROPICAL STORM HANNA IS BRINGING PERIODS OF HEAVY
RAIN TO THE CENTRAL MARITIMES. RAINFALL WARNINGS ARE IN EFFECT
FOR SOUTHERN NEW BRUNSWICK..PEI AND NORTHERN AND WESTERN NOVA
SCOTIA. TOTAL RAINFALLS OF UP TO 130 MM ARE POSSIBLE LOCALLY
ACROSS SOUTHERN NEW BRUNSWICK. WINDS GUSTING UP TO 70 KM/H
CAN BE EXPECTED OVER NOVA SCOTIA. WINDS WILL NOT BE MUCH OF A
FACTOR OVER NEW BRUNSWICK.
RAIN AT TIMES HEAVY HAS BEGUN OVER SOUTHERN NEWFOUNDLAND AND
WILL PERSIST OVER PORTIONS OF THE ISLAND TONIGHT AND MONDAY.
GUSTY NORTHERLY WINDS CAN BE EXPECTED OVER EASTERN PORTIONS
OF NEWFOUNDLAND AS POST-TROPICAL HANNA MOVES EAST OF THE
ISLAND ON MONDAY. RAINFALL WARNINGS HAVE BEEN ISSUED BY THE
NEWFOUNDLAND AND LABRADOR WEATHER OFFICE FOR PORTIONS OF
NEWFOUNDLAND AS A RESULT.
4. MARINE WEATHER IMPACTS AND WARNINGS SUMMARY
GALES ARE FORECAST OVER MARITIME WATERS SOUTH OF THE TRACK OF
POST-TROPICAL STORM HANNA TODAY. WAVE HEIGHTS ASSOCIATED WITH
THESE WINDS SHOULD REACH NEAR 5 METRES IN THE OFFSHORE REGIONS
BY LATE SUNDAY.
GALES WILL SPREAD INTO EASTERN AND SOUTHERN NEWFOUNDLAND WATERS
TONIGHT AND MONDAY.
5. TECHNICAL DISCUSSION FOR METEOROLOGISTS
A. ANALYSIS
THE CENTRE OF HANNA IS OVER THE GULF OF MAINE. THE LATEST
RADAR DATA SHOWS THE BULK OF THE HEAVIEST RAIN IS LEFT
OF THE STORM'S TRACK WHICH IS TYPICAL FOR EXTRATROPICAL
TRANSITIONING SYSTEMS. A COUPLE OF AUTOMATIC REPORTING
STATIONS - POINT LEPREAU AND MECHANIC SETTLEMENT IN SOUTHERN
NEW BRUNSWICK - HAVE OBSERVED RAINFALL RATES IN EXCESS OF 30
MILLIMETERS PER HOUR IN THE PAST 3 HOURS. THE STRONGEST WINDS
OBSERVED ARE TO THE RIGHT OF HANNA'S TRACK..ALSO TYPICAL OF
EXTRATROPICAL TRANSITION.
B. PROGNOSTIC
THE GREATEST CONCERN WITH POST-TROPICAL HANNA IS RAINFALL.
COMPUTER MODELS ARE STILL CONSISTENT WITH REGARDS TO THE TRACK
AND INTENSITY OF HANNA..WITH THE CONSENSUS TAKING THE CENTRE
OF POST-TROPICAL HANNA ALONG A PATH IN THE VICINITY OF THE BAY
OF FUNDY AROUND NOON TODAY AND OVER CABOT STRAIT NEAR MIDNIGHT
TONIGHT. POST-TROPICAL HANNA WILL THEN TRACK NORTHEASTWARD TO
LIE NEAR THE EAST COAST OF NEWFOUNDLAND MONDAY MORNING. A
SHORTWAVE TROUGH INTERACTING WITH POST-TROPICAL HANNA WILL CAUSE
THE SYSTEM TO SLOW DOWN AND INTENSIFY MONDAY. MONDAY NIGHT
POST-TROPICAL HANNA WILL EXIT CANADIAN WATERS AS AN INTENSIFYING
BAROCLINIC STORM OVER THE NORTH ATLANTIC.
C. PUBLIC WEATHER
SEE ABOVE.
D. MARINE WEATHER
THESE WIND RADII REPRESENT BOTH HANNA AND THE LARGE SCALE CIRCULATION
AT THE OUTER EDGES OF THE STORM.
PREDICTED WIND RADII (NM)
TIME GALES STORMS HURRICANE
NE SE SW NW NE SE SW NW NE SE SW NW
07/12Z 0 175 150 0 0 0 0 0 0 0 0 0
07/18Z 0 175 175 0 0 0 0 0 0 0 0 0
08/00Z 0 175 175 0 0 0 0 0 0 0 0 0
08/06Z 175 175 175 0 0 0 0 0 0 0 0 0
08/12Z 200 225 175 0 0 0 0 0 0 0 0 0
08/18Z 250 250 200 60 0 0 0 0 0 0 0 0
09/00Z 250 250 200 90 0 0 0 0 0 0 0 0
09/06Z 250 250 200 150 0 0 90 90 0 0 0 0
09/12Z 250 250 150 150 0 0 90 90 0 0 0 0
09/18Z 250 250 150 150 0 0 90 90 0 0 0 0
10/00Z 250 250 150 150 0 0 90 90 0 0 0 0
END HATT/LAFORTUNE/SAULNIER
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ZCZC MIATCPAT3 ALL
TTAA00 KNHC DDHHMM
BULLETIN
TROPICAL STORM HANNA ADVISORY NUMBER 42
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL082008
500 AM EDT SUN SEP 07 2008
...HANNA LOSES TROPICAL CHARACTERISTICS AS IT MOVES THROUGH NEW
ENGLAND...
AT 5 AM EDT...0900 UTC...ALL COASTAL TROPICAL STORM WARNINGS ARE
DISCONTINUED.
FOR STORM INFORMATION SPECIFIC TO YOUR AREA...INCLUDING POSSIBLE
INLAND WATCHES AND WARNINGS...PLEASE MONITOR PRODUCTS ISSUED
BY YOUR LOCAL WEATHER OFFICE.
AT 500 AM EDT...0900Z...THE CENTER OF TROPICAL STORM HANNA WAS
LOCATED NEAR LATITUDE 42.6 NORTH...LONGITUDE 70.0 WEST OR ABOUT 60
MILES...100 KM...NORTH OF CHATHAM MASSACHUSETTS AND ABOUT 350 MILES
...560 KM...WEST-SOUTHWEST OF HALIFAX NOVA SCOTIA.
HANNA IS MOVING TOWARD THE NORTHEAST NEAR 36 MPH...57 KM/HR...AND
THIS MOTION IS EXPECTED TO CONTINUE FOR THE NEXT 24 HOURS.
MAXIMUM SUSTAINED WINDS ARE NEAR 50 MPH...85 KM/HR...WITH HIGHER
GUSTS. LITTLE CHANGE IN STRENGTH IS FORECAST DURING THE NEXT 24
HOURS.
TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 200 MILES...325 KM
...MAINLY OVER WATER TO THE EAST AND SOUTH OF THE CENTER.
ESTIMATED MINIMUM CENTRAL PRESSURE IS 995 MB...29.38 INCHES.
HANNA IS EXPECTED TO PRODUCE ADDITIONAL RAINFALL ACCUMULATIONS OF 1
TO 2 INCHES ACROSS CENTRAL TO SOUTHERN MAINE EARLY SUNDAY
MORNING...WITH THE RAINFALL ENDING ACROSS MAINE BY AROUND SUNRISE.
REPEATING THE 500 AM EDT POSITION...42.6 N...70.0 W. MOVEMENT
TOWARD...NORTHEAST NEAR 36 MPH. MAXIMUM SUSTAINED WINDS...50 MPH.
MINIMUM CENTRAL PRESSURE...995 MB.
THIS IS THE LAST PUBLIC ADVISORY ISSUED BY THE NATIONAL HURRICANE
CENTER ON THIS SYSTEM. FUTURE INFORMATION ON THIS SYSTEM CAN BE
FOUND IN HIGH SEAS FORECASTS ISSUED BY THE NATIONAL WEATHER
SERVICE OCEAN PREDICTION CENTER...UNDER AWIPS HEADER NFDHSFAT1 AND
WMO HEADER FZNT01 KWBC.
$$
FORECASTER FRANKLIN
NNNN
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ZCZC MIATCDAT3 ALL
TTAA00 KNHC DDHHMM
TROPICAL STORM HANNA DISCUSSION NUMBER 42
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL082008
500 AM EDT SUN SEP 07 2008
THE CLOUD PATTERN ASSOCIATED WITH HANNA IS SPREADING OUT WELL AHEAD
OF THE SURFACE CENTER...WITH THE CLOSEST DEEP CONVECTION NOW
DISPLACED ABOUT 125 NMI TO THE NORTH AND NORTHEAST. THE
CIRCULATION IS ALSO CLOSE TO...BUT NOT QUITE ENTANGLED WITH...A
FRONTAL BOUNDARY. BASED ON THE LOSS OF CONVECTION NEAR THE
CORE...HANNA IS NO LONGER CONSIDERED TO BE A TROPICAL CYCLONE AND
THIS WILL BE THE LAST ADVISORY.
MAXIMUM WINDS ARE ESTIMATED TO BE 45 KT BASED ON SHIP REPORTS...AND
HANNA IS EXPECTED TO REMAIN A VIGOROUS EXTRATROPICAL CYCLONE DURING
ITS PASSAGE OVER THE NORTH ATLANTIC. THE OFFICIAL FORECAST IS IN
GOOD AGREEMENT WITH THE GFS.
FUTURE INFORMATION ON THIS SYSTEM CAN BE FOUND IN HIGH SEAS
FORECASTS ISSUED BY THE NATIONAL WEATHER SERVICE OCEAN PREDICTION
CENTER...UNDER AWIPS HEADER NFDHSFAT1 AND WMO HEADER FZNT01 KWBC.
FORECAST POSITIONS AND MAX WINDS
INITIAL 07/0900Z 42.6N 70.0W 45 KT...EXTRATROPICAL
12HR VT 07/1800Z 45.4N 64.5W 45 KT...EXTRATROPICAL
24HR VT 08/0600Z 48.4N 57.1W 45 KT...EXTRATROPICAL
36HR VT 08/1800Z 50.0N 50.0W 45 KT...EXTRATROPICAL
48HR VT 09/0600Z 51.0N 43.0W 45 KT...EXTRATROPICAL
72HR VT 10/0600Z 53.5N 27.0W 45 KT...EXTRATROPICAL
96HR VT 11/0600Z 58.0N 16.0W 40 KT...EXTRATROPICAL
120HR VT 12/0600Z...ABSORBED WITHIN EXTRATROPICAL LOW
$$
FORECASTER FRANKLIN
NNNN
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WOCN31 CWHX 070600
TROPICAL STORM HANNA INFORMATION STATEMENT ISSUED BY THE
CANADIAN HURRICANE CENTRE OF ENVIRONMENT CANADA AT 3.00 AM ADT
SUNDAY 07 SEPTEMBER 2008.
THE NEXT STATEMENT WILL BE ISSUED BY 9.00 AM ADT
... POST-TROPICAL STORM HANNA TO CROSS THE MARITIMES
TODAY AND NEWFOUNDLAND TONIGHT...
1. CURRENT POSITION, STRENGTH, CENTRAL PRESSURE AND MOTION
AT 3.00 AM ADT... TROPICAL STORM HANNA WAS LOCATED NEAR LATITUDE
41.6 N AND LONGITUDE 71.9 W... ABOUT 20 NAUTICAL MILES OR 40 KM
WEST SOUTHWEST OF PROVIDENCE RHODE ISLAND. MAXIMUM SUSTAINED WINDS
ARE ESTIMATED AT 50 KNOTS... 93 KM/H... AND CENTRAL PRESSURE
AT 992 MB. HANNA IS MOVING EAST NORTHEAST AT 29 KNOTS... 54 KM/H.
2. FORECAST POSITION, CENTRAL PRESSURE AND STRENGTH
DATE TIME LAT LON MSLP MAX WIND
ADT MB KTS KMH
SEP 07 3.00 AM 41.6N 71.9W 992 45 83 TRANSITIONING
SEP 07 9.00 AM 42.9N 68.7W 994 45 83 POST-TROPICAL
SEP 07 3.00 PM 45.1N 64.9W 996 45 83 POST-TROPICAL
SEP 07 9.00 PM 46.8N 60.8W 996 45 83 POST-TROPICAL
SEP 08 3.00 AM 47.9N 57.0W 996 45 83 POST-TROPICAL
SEP 08 9.00 AM 48.9N 53.3W 994 45 83 POST-TROPICAL
SEP 08 3.00 PM 49.5N 50.9W 991 45 83 POST-TROPICAL
SEP 08 9.00 PM 50.3N 48.8W 988 50 93 POST-TROPICAL
SEP 09 3.00 AM 51.3N 44.6W 985 50 93 POST-TROPICAL
SEP 09 9.00 AM 52.2N 40.2W 984 50 93 POST-TROPICAL
SEP 09 3.00 PM 53.2N 35.2W 984 50 93 POST-TROPICAL
3. PUBLIC WEATHER IMPACTS AND WARNINGS SUMMARY
POST-TROPICAL STORM HANNA WILL BRING PERIODS OF HEAVY
RAIN TO THE MARITIMES TODAY. RAINFALL WARNINGS HAVE BEEN ISSUED
BY THE ATLANTIC STORM PREDICTION CENTRE FOR SOUTHERN
NEW BRUNSWICK..PEI AND NORTHERN AND WESTERN NOVA SCOTIA WITH 40 TO
80 MM LIKELY.. WITH SOME COMPUTER GUIDANCE SUGGESTING NEAR 100 MM
POSSIBLE IN SOME AREAS. GUSTY WINDS CAN BE EXPECTED OVER NOVA
SCOTIA..GUSTING TO AROUND 70 KM/H. WINDS SHOULD NOT BE MUCH OF A
FACTOR OVER NEW BRUNSWICK.
RAIN AT TIMES HEAVY WILL BEGIN OVER SOUTHERN NEWFOUNDLAND
TODAY AND WILL PERSIST OVER PORTIONS OF THE ISLAND TONIGHT AND
MONDAY. GUSTY NORTHERLY WINDS CAN BE EXPECTED OVER EASTERN
PORTIONS OF NEWFOUNDLAND AS POST-TROPICAL HANNA MOVES EAST OF
THE ISLAND ON MONDAY. RAINFALL WARNINGS HAVE BEEN ISSUED BY THE
NEWFOUNDLAND AND LABRADOR WEATHER OFFICE FOR PORTIONS OF
NEWFOUNDLAND AS A RESULT.
4. MARINE WEATHER IMPACTS AND WARNINGS SUMMARY
GALES ARE FORECAST OVER MARITIME WATERS SOUTH OF THE TRACK OF
POST-TROPICAL STORM HANNA TODAY. WAVE HEIGHTS ASSOCIATED WITH
THESE WINDS SHOULD REACH NEAR 5 METRES IN THE OFFSHORE REGIONS
BY LATE SUNDAY.
GALES WILL SPREAD INTO EASTERN AND SOUTHERN NEWFOUNDLAND WATERS
TONIGHT AND MONDAY.
5. TECHNICAL DISCUSSION FOR METEOROLOGISTS
A. ANALYSIS
THE CENTRE OF HANNA IS OVER SOUTHEASTERN CONNECTICUT. THE LATEST
RADAR DATA SHOWS THE BULK OF HEAVIEST RAIN BANDS HAVE SHIFTED LEFT
OF THE STORM'S TRACK WHICH IS TYPICAL FOR EXTRATROPICAL
TRANSITIONING SYSTEMS. THE STRONGEST WINDS OBSERVED ARE TO THE
RIGHT OF HANNA'S TRACK..ALSO TYPICAL OF EXTRATROPICAL TRANSITION.
B. PROGNOSTIC
THE GREATEST CONCERN WITH POST-TROPICAL HANNA WILL BE RAINFALL.
COMPUTER MODELS ARE STILL CONSISTENT WITH REGARDS TO THE TRACK
AND INTENSITY OF HANNA..WITH THE CONSENSUS TAKING THE CENTRE
OF POST-TROPICAL HANNA ALONG A PATH IN THE VICINITY OF THE BAY
OF FUNDY AROUND NOON TODAY AND OVER CABOT STRAIT NEAR MIDNIGHT
TONIGHT. POST-TROPICAL HANNA WILL THEN TRACK NORTHEASTWARD TO
LIE NEAR THE EAST COAST OF NEWFOUNDLAND MONDAY MORNING. A
SHORTWAVE TROUGH INTERACTING WITH POST-TROPICAL HANNA WILL CAUSE
THE SYSTEM TO SLOW DOWN AND INTENSIFY MONDAY. MONDAY NIGHT
POST-TROPICAL HANNA WILL EXIT CANADIAN WATERS AS AN INTENSIFYING
BAROCLINIC STORM OVER THE NORTH ATLANTIC.
CYCLONE PHASE SPACE DIAGRAMS CONTINUE SUGGESTING EXTRATROPICAL
TRANSITION WILL BE COMPLETE PRIOR TO IT REACHING CANADIAN WATERS.
THIS INDICATES THAT THE WIND FIELD SHOULD BEHAVE GENERALLY LIKE A
TRADITIONAL BAROCLINIC CYCLONE AS IT CROSSES THE MARITIMES.
C. PUBLIC WEATHER
SEE ABOVE.
D. MARINE WEATHER
THESE WIND RADII REPRESENT BOTH HANNA AND THE LARGE SCALE CIRCULATION
AT THE OUTER EDGES OF THE STORM.
PREDICTED WIND RADII (NM)
TIME GALES STORMS HURRICANE
NE SE SW NW NE SE SW NW NE SE SW NW
07/06Z 150 220 40 20 0 60 0 0 0 0 0 0
07/12Z 150 240 100 40 0 0 0 0 0 0 0 0
07/18Z 150 250 150 40 0 0 0 0 0 0 0 0
08/00Z 150 250 150 40 0 0 0 0 0 0 0 0
08/06Z 150 250 150 40 0 0 0 0 0 0 0 0
08/12Z 150 250 150 40 0 0 0 0 0 0 0 0
08/18Z 170 250 150 60 0 0 0 0 0 0 0 0
09/00Z 180 250 150 150 0 0 0 0 0 0 0 0
09/06Z 190 250 150 150 0 0 90 90 0 0 0 0
09/12Z 190 250 150 150 0 0 90 90 0 0 0 0
09/18Z 190 250 150 150 0 0 90 90 0 0 0 0
END HATT/LAFORTUNE
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ZCZC MIATCPAT3 ALL
TTAA00 KNHC DDHHMM
BULLETIN
TROPICAL STORM HANNA INTERMEDIATE ADVISORY NUMBER 41A
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL082008
200 AM EDT SUN SEP 07 2008
...HANNA BEGINNING TO LOSE TROPICAL CHARACTERISTICS...
AT 2 AM EDT...0600 UTC...THE TROPICAL STORM WARNING IS DISCONTINUED
FROM WATCH HILL RHODE ISLAND SOUTHWARD. A TROPICAL STORM WARNING IS
NOW IN EFFECT FROM NORTH OF WATCH HILL NORTHWARD TO MERRIMACK RIVER
MASSACHUSETTS...INCLUDING BLOCK ISLAND...MARTHA'S VINEYARD AND
NANTUCKET.
FOR STORM INFORMATION SPECIFIC TO YOUR AREA...INCLUDING POSSIBLE
INLAND WATCHES AND WARNINGS...PLEASE MONITOR PRODUCTS ISSUED
BY YOUR LOCAL WEATHER OFFICE.
AT 200 AM EDT...0600Z...THE CENTER OF TROPICAL STORM HANNA WAS
LOCATED NEAR LATITUDE 41.6 NORTH...LONGITUDE 71.9 WEST OR OVER
EXTREME EASTERN CONNECTICUT.
HANNA IS MOVING TOWARD THE NORTHEAST NEAR 33 MPH...54 KM/HR. THIS
GENERAL MOTION IS EXPECTED TO CONTINUE WITH AN INCREASE IN FORWARD
SPEED DURING THE NEXT COUPLE OF DAYS.
MAXIMUM SUSTAINED WINDS ARE NEAR 50 MPH...85 KM/HR... WITH HIGHER
GUSTS...OVER WATER WELL TO THE EAST OF THE CENTER. HANNA IS
EXPECTED TO BECOME EXTRATROPICAL DURING THE NEXT FEW HOURS.
TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 200 MILES...325 KM
...TO THE EAST AND SOUTHEAST OF THE CENTER.
THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 994 MB...29.35 INCHES.
STORM SURGE FLOODING OF 1 TO 3 FEET ABOVE NORMAL TIDE LEVELS...WITH
LOCALLY HIGHER LEVELS IN BAYS...IS EXPECTED IN THE WARNING AREA.
HANNA IS EXPECTED TO PRODUCE RAINFALL ACCUMULATIONS OF 2 TO 4 INCHES
ACROSS NEW ENGLAND...WITH ISOLATED MAXIMUM AMOUNTS OF 6 INCHES
POSSIBLE. THESE RAINS COULD PRODUCE FLASH FLOODS ACROSS THE REGION.
ISOLATED TORNADOES ARE POSSIBLE TONIGHT OVER THE COASTAL AREAS OF
SOUTHERN NEW ENGLAND.
REPEATING THE 200 AM EDT POSITION...41.6 N...71.9 W. MOVEMENT
TOWARD...NORTHEAST NEAR 33 MPH. MAXIMUM SUSTAINED WINDS...50 MPH.
MINIMUM CENTRAL PRESSURE...994 MB.
THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT
500 AM EDT.
$$
FORECASTER FRANKLIN
NNNN
