474  
WTNT35 KNHC 222030  
TCPAT5  
 
BULLETIN  
POST-TROPICAL CYCLONE ERIN ADVISORY NUMBER 46  
NWS NATIONAL HURRICANE CENTER MIAMI FL AL052025  
500 PM AST FRI AUG 22 2025  
   
..ERIN BECOMES POST-TROPICAL, THIS IS THE LAST ADVISORY  
 
...SWIMMING AT MANY U.S. EAST COAST BEACHES IS LIKELY TO REMAIN  
DANGEROUS THROUGH THE WEEKEND...  
 
 
SUMMARY OF 500 PM AST...2100 UTC...INFORMATION  
----------------------------------------------  
LOCATION...40.0N 59.7W  
ABOUT 605 MI...970 KM NNE OF BERMUDA  
ABOUT 375 MI...605 KM SSE OF HALIFAX NOVA SCOTIA  
MAXIMUM SUSTAINED WINDS...90 MPH...150 KM/H  
PRESENT MOVEMENT...ENE OR 65 DEGREES AT 33 MPH...54 KM/H  
MINIMUM CENTRAL PRESSURE...957 MB...28.26 INCHES  
 
 
WATCHES AND WARNINGS  
--------------------  
THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.  
 
 
DISCUSSION AND OUTLOOK  
----------------------  
AT 500 PM AST (2100 UTC), THE CENTER OF POST-TROPICAL CYCLONE ERIN  
WAS LOCATED NEAR LATITUDE 40.0 NORTH, LONGITUDE 59.7 WEST. THE  
POST-TROPICAL CYCLONE IS MOVING TOWARD THE EAST-NORTHEAST NEAR 33  
MPH (54 KM/H). THIS GENERAL MOTION WITH AN INCREASE IN FORWARD  
SPEED IS EXPECTED LATER TODAY, FOLLOWED BY A TURN BACK TO THE  
NORTHEAST ON SUNDAY. ON THE FORECAST TRACK, THE CENTER OF ERIN  
WILL PASS SOUTH OF ATLANTIC CANADA TODAY AND TONIGHT, AND THEN RACE  
ACROSS THE NORTH ATLANTIC WATERS.  
 
MAXIMUM SUSTAINED WINDS REMAIN NEAR 90 MPH (150 KM/H) WITH HIGHER  
GUSTS. ERIN IS LIKELY TO REMAIN A LARGE AND POWERFUL  
HURRICANE-FORCE LOW PRESSURE SYSTEM THROUGH THE WEEKEND.  
 
HURRICANE-FORCE WINDS EXTEND OUTWARD UP TO 125 MILES (205 KM) FROM  
THE CENTER AND TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 435  
MILES (705 KM).  
 
THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 957 MB (28.26 INCHES).  
 
 
HAZARDS AFFECTING LAND  
----------------------  
KEY MESSAGES FOR ERIN CAN BE FOUND IN THE TROPICAL CYCLONE  
DISCUSSION UNDER AWIPS HEADER MIATCDAT5 AND WMO HEADER WTNT45 KNHC.  
 
WIND: GALE-FORCE WIND GUSTS ARE POSSIBLE ALONG PORTIONS OF THE  
COAST OF NOVA SCOTIA TODAY AND THE AVALON PENINSULA OF NEWFOUNDLAND  
ON SATURDAY.  
 
SURF: SWELLS GENERATED BY ERIN WILL AFFECT THE BAHAMAS, BERMUDA,  
THE EAST COAST OF THE UNITED STATES, AND ATLANTIC CANADA DURING THE  
NEXT FEW DAYS. THESE ROUGH OCEAN CONDITIONS ARE EXPECTED TO  
CAUSE LIFE-THREATENING SURF AND RIP CURRENTS. PLEASE CONSULT  
PRODUCTS FROM YOUR LOCAL WEATHER FORECAST OFFICE FOR MORE  
INFORMATION.  
 
A DEPICTION OF RIP CURRENT RISK FOR THE UNITED STATES CAN BE FOUND  
AT: HURRICANES.GOV/GRAPHICS_AT5.SHTML?RIPCURRENTS  
 
STORM SURGE: SOME COASTAL FLOODING IS EXPECTED AT TIMES OF HIGH  
TIDE ALONG PORTIONS OF THE U.S. MID-ATLANTIC AND NEW ENGLAND COASTS  
THROUGH TONIGHT, MAKING SOME ROADS IMPASSABLE. SEE UPDATES FROM  
YOUR LOCAL NATIONAL WEATHER SERVICE OFFICE FOR DETAILS.  
 
 
NEXT ADVISORY  
-------------  
THIS IS THE LAST PUBLIC ADVISORY ISSUED BY THE NATIONAL HURRICANE  
CENTER ON THIS SYSTEM. ADDITIONAL INFORMATION ON THIS SYSTEM CAN BE  
FOUND IN HIGH SEAS FORECASTS ISSUED BY THE NATIONAL WEATHER  
SERVICE, UNDER AWIPS HEADER NFDHSFAT1, WMO HEADER FZNT01 KWBC, AND  
ONLINE AT OCEAN.WEATHER.GOV/SHTML/NFDHSFAT1.PHP  
 
 
FORECASTER BLAKE  
 
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