Post-Tropical Cyclone Lee Forecast Discussion Number 48

By | September 17, 2023

WTNT43 KNHC 170847

Post-Tropical Cyclone Lee Discussion Number  48
NWS National Hurricane Center Miami FL       AL132023
500 AM AST Sun Sep 17 2023

Satellite imagery, surface observations and Canadian radar imagery
indicates that the center of Lee is near Prince Edward Island, 
with most of the rain west of the center near New Brunswick.  
Observations from the southern coast of Nova Scotia support lowering
the intensity to 45 kt on this advisory.

Lee has turned northeastward at about 19 kt.  The system should 
accelerate in this general direction as it interacts with the 
stronger mid-latitude flow, but gradually weaken since it has lost 
any baroclinic forcing. No significant changes were made to the 
previous forecast, except to keep Lee a bit stronger in 36 hours 
based on the global model wind forecasts.


1. Tropical storm conditions and coastal flooding are occurring
across portions of Atlantic Canada. These winds could lead to 
downed trees and power outages.

2. Dangerous surf and life-threatening rip currents will continue
to affect the U.S. East Coast, Atlantic Canada, Bermuda, the
Bahamas, the Turks and Caicos Islands, Hispaniola, and Puerto
Rico through Monday.


INIT  17/0900Z 46.5N  63.7W   45 KT  50 MPH...POST-TROPICAL
 12H  17/1800Z 48.4N  60.3W   40 KT  45 MPH...POST-TROP/EXTRATROP
 24H  18/0600Z 51.2N  52.6W   35 KT  40 MPH...POST-TROP/EXTRATROP
 36H  18/1800Z 53.5N  40.0W   35 KT  40 MPH...POST-TROP/EXTRATROP
 48H  19/0600Z...DISSIPATED

Forecaster Blake

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