464  
WTNT33 KNHC 161442  
TCPAT3  
 
BULLETIN  
POST-TROPICAL CYCLONE HELENE ADVISORY NUMBER 37  
NWS NATIONAL HURRICANE CENTER MIAMI FL AL082018  
1100 AM AST SUN SEP 16 2018  
   
..HELENE NOW A POST-TROPICAL CYCLONE
 
   
..THIS IS THE LAST ADVISORY
 
 
SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION  
-----------------------------------------------  
LOCATION...43.8N 25.7W  
ABOUT 405 MI...655 KM N OF THE AZORES  
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H  
PRESENT MOVEMENT...NE OR 55 DEGREES AT 29 MPH...46 KM/H  
MINIMUM CENTRAL PRESSURE...989 MB...29.21 INCHES  
 
WATCHES AND WARNINGS  
--------------------  
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:  
 
NONE.  
 
INTERESTS IN IRELAND AND THE UNITED KINGDOM SHOULD CONSULT PRODUCTS  
FROM THEIR LOCAL METEOROLOGICAL SERVICE FOR INFORMATION ABOUT  
POTENTIAL IMPACTS FROM POST-TROPICAL HELENE IN THOSE LOCATIONS.  
LOCAL FORECASTS AND WARNINGS FOR THE UK CAN BE FOUND ON THE WEBSITE  
OF THE UK MET OFFICE AT HTTPS://WWW.METOFFICE.GOV.UK/. LOCAL  
FORECASTS AND WARNINGS FOR IRELAND CAN BE FOUND ON THE WEBSITE OF  
MET EIREANN AT HTTPS://WWW.MET.IE/.  
 
DISCUSSION AND OUTLOOK  
----------------------  
AT 1100 AM AST (1500 UTC), THE CENTER OF POST-TROPICAL CYCLONE  
HELENE WAS LOCATED NEAR LATITUDE 43.8 NORTH, LONGITUDE 25.7 WEST.  
THE POST-TROPICAL CYCLONE IS MOVING TOWARD THE NORTHEAST NEAR 29 MPH  
(46 KM/H), AND THIS MOTION IS EXPECTED TO CONTINUE WITH AN INCREASE  
IN FORWARD SPEED DURING THE NEXT 24 HOURS. ON THE FORECAST TRACK,  
THE POST-TROPICAL CYCLONE WILL APPROACH IRELAND AND THE UNITED  
KINGDOM ON MONDAY.  
 
MAXIMUM SUSTAINED WINDS ARE NEAR 50 MPH (85 KM/H) WITH HIGHER GUSTS.  
SOME SLIGHT STRENGTHENING IS POSSIBLE TODAY. SOME WEAKENING IS  
EXPECTED BY MONDAY, AND THE SYSTEM IS FORECAST TO BE ABSORBED  
BY ANOTHER LOW PRESSURE AREA BY EARLY TUESDAY.  
 
TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 230 MILES (370 KM)  
FROM THE CENTER.  
 
THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 989 MB (29.21 INCHES).  
 
HAZARDS AFFECTING LAND  
----------------------  
INFORMATION ON RAINFALL AND WIND FORECASTS FOR IRELAND CAN BE  
FOUND IN PRODUCTS ISSUED BY MET EIREANN AT WWW.MET.IE AND FOR THE  
UNITED KINGDOM IN PRODUCTS ISSUED BY THE UNITED KINGDOM MET OFFICE  
AT WWW.METOFFICE.GOV/UK.  
 
SURF: SWELLS GENERATED BY HELENE ARE AFFECTING PORTIONS OF THE  
AZORES. THESE SWELLS ARE LIKELY TO CONTINUE FOR ANOTHER DAY OR SO  
AND COULD CAUSE LIFE-THREATENING SURF AND RIP CURRENT CONDITIONS.  
PLEASE CONSULT PRODUCTS FROM YOUR LOCAL WEATHER OFFICE.  
 
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 METEO FRANCE UNDER WMO HEADER  
FQNT50 LFPW AND AVAILABLE ON THE WEB AT:  
HTTP://WWW.METEOFRANCE.COM/PREVISIONS-METEO-MARINE/BULLETIN.  
ADDITIONAL INFORMATION CAN ALSO BE FOUND IN HIGH SEAS FORECAST  
ISSUED BY THE UK MET OFFICE UNDER WMO HEADER FQNT21 EGRR AND ON THE  
WEB AT:  
HTTP://WWW.METOFFICE.GOV.UK/PUBLIC/WEATHER/MARINE-HIGH-SEAS/.  
 

 
FORECASTER BROWN  
 
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