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Post-Tropical Cyclone Lee Advisory Number 44
NWS National Hurricane Center Miami FL AL132023
500 AM AST Sat Sep 16 2023
...LEE BECOMES POST-TROPICAL AS IT APPROACHES NOVA SCOTIA, BUT IT
IS STILL PRODUCING HURRICANE-FORCE WINDS...
...NHC ADVISORIES WILL CONTINUE...
SUMMARY OF 500 AM AST...0900 UTC...INFORMATION
ABOUT 230 MI...365 KM SSW OF HALIFAX NOVA SCOTIA
ABOUT 220 MI...355 KM SSE OF EASTPORT MAINE
MAXIMUM SUSTAINED WINDS...80 MPH...130 KM/H
PRESENT MOVEMENT...N OR 355 DEGREES AT 25 MPH...41 KM/H
MINIMUM CENTRAL PRESSURE...965 MB...28.50 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Hurricane Watch is in effect for...
* New Brunswick from the U.S./Canada border to Point Lepreau,
including Grand Manan Island
* Nova Scotia from Digby to Ecum Secum
A Tropical Storm Warning is in effect for...
* Westport Massachusetts northward to the U.S./Canada border
* Martha's Vineyard
* New Brunswick from the U.S./Canada border to Fort Lawrence,
including Grand Manan Island
* New Brunswick from Shediac to Tidnish
* Nova Scotia from Fort Lawrence to Point Tupper
A Tropical Storm Watch is in effect for...
* Prince Edward Island
* Magdalen Islands
* New Brunswick from Belledune to Shediac
* Nova Scotia from Tidnish to Aulds Cove
* Nova Scotia from Aulds Cove to Meat Cove to Point Tupper
A Hurricane Watch means that hurricane conditions are possible
within the watch area, in this case later today.
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning, in this case today through
For storm information specific to your area in the United States,
including possible inland watches and warnings, please monitor
products issued by your local National Weather Service forecast
office. For storm information specific to your area outside of the
United States, please monitor products issued by your national
DISCUSSION AND OUTLOOK
At 500 AM AST (0900 UTC), the center of Post-Tropical Cyclone Lee
was located near latitude 41.8 North, longitude 66.0 West. Lee is
moving toward the north near 25 mph (41 km/h). A northward motion
but at a slower forward speed is expected later today, and the
center of Lee is forecast to reach western Nova Scotia around
midday. Lee is then expected to turn toward the north-northeast and
northeast and move across Atlantic Canada tonight and Sunday.
Data from an Air Force Reserve Hurricane Hunter aircraft indicate
that maximum sustained winds remain near 80 mph (130 km/h) with
higher gusts. Lee is expected to be at or just below hurricane
strength when it reaches Nova Scotia later today. Weakening is
forecast tonight and Sunday while Lee moves across Atlantic Canada.
Hurricane-force winds extend outward up to 140 miles (220 km) from
the center and tropical-storm-force winds extend outward up to 390
miles (630 km). A sustained wind of 47 mph (76 km/h) and a gust to
56 mph (91 km/h) was recently reported at Brier Island, Nova
Scotia. A sustained wind of 43 mph (69 km/h) and a gust to 59 mph
(94 km/h) were recently measured at Dennis, Massachusetts.
The minimum central pressure based on dropsonde data is 965 mb
HAZARDS AFFECTING LAND
Key messages for Lee can be found in the Tropical Cyclone Discussion
under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the
web at hurricanes.gov/text/MIATCDAT3.shtml
WIND: Hurricane conditions are possible in the Hurricane Watch
areas in Atlantic Canada later today. Tropical storm conditions
are occurring along the coasts of New England and Nova Scotia and
will spread northward within the Tropical Storm Warning areas today
and tonight. The strong winds are likely to lead to downed trees
and potential power outages.
SURF: Swells generated by Lee are affecting the U.S. Virgin
Islands, Puerto Rico, Hispaniola, the Turks and Caicos Islands, the
Bahamas, Bermuda, the east coast of the United States, and Atlantic
Canada. These swells are likely to cause life-threatening surf and
rip current conditions. Please consult products from your local
RAINFALL: Through tonight, Lee is expected to produce rainfall
amounts of 1 to 4 inches (25 to 100 millimeters) over far eastern
Massachusetts, eastern Maine, western Nova Scotia, and New
Brunswick. This may produce localized urban and small stream
STORM SURGE: The combination of storm surge and tide will cause
normally dry areas near the coast to be flooded by rising waters
moving inland from the shoreline. The water could reach the
following heights above ground somewhere in the indicated areas if
the peak surge occurs at the time of high tide...
Watch Hill, RI to the U.S./Canada border...1-3 ft
Cape Cod...1-3 ft
Martha's Vineyard and Nantucket...1-3 ft
Boston Harbor...1-3 ft
The deepest water will occur along the immediate coast where the
surge will be accompanied by large and destructive waves.
Surge-related flooding depends on the relative timing of the surge
and the tidal cycle, and can vary greatly over short distances. For
information specific to your area, please see products issued by
your local National Weather Service forecast office.
A dangerous storm surge will produce coastal flooding within the
wind warning areas in Atlantic Canada in areas of onshore winds.
Near the coast, the surge will be accompanied by large and
Next intermediate advisory at 800 AM AST.
Next complete advisory at 1100 AM AST.