066  
WTNT32 KNHC 151443  
TCPAT2  
 
BULLETIN  
HURRICANE OPHELIA ADVISORY NUMBER 26  
NWS NATIONAL HURRICANE CENTER MIAMI FL AL172017  
1100 AM AST SUN OCT 15 2017  
 
...OPHELIA EXPECTED TO BECOME A STRONG POST-TROPICAL CYCLONE BY  
TONIGHT...  
 
SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION  
-----------------------------------------------  
LOCATION...41.6N 16.0W  
ABOUT 635 MI...1020 KM ENE OF THE AZORES  
MAXIMUM SUSTAINED WINDS...90 MPH...150 KM/H  
PRESENT MOVEMENT...NNE OR 25 DEGREES AT 38 MPH...61 KM/H  
MINIMUM CENTRAL PRESSURE...973 MB...28.74 INCHES  
 
WATCHES AND WARNINGS  
--------------------  
THERE ARE NO COASTAL TROPICAL CYCLONE WATCHES OR WARNINGS IN EFFECT.  
 
INTERESTS IN IRELAND SHOULD MONITOR PRODUCTS ISSUED BY MET EIREANN,  
AND INTERESTS IN THE UNITED KINGDOM SHOULD MONITOR PRODUCTS ISSUED  
BY THE UK MET OFFICE.  
 
DISCUSSION AND 48-HOUR OUTLOOK  
------------------------------  
AT 1100 AM AST (1500 UTC), THE CENTER OF HURRICANE OPHELIA WAS  
LOCATED NEAR LATITUDE 41.6 NORTH, LONGITUDE 16.0 WEST. OPHELIA IS  
MOVING TOWARD THE NORTH-NORTHEAST NEAR 38 MPH (61 KM/H), AND THIS  
MOTION IS EXPECTED TO CONTINUE DURING THE NEXT 24 TO 48 HOURS. ON  
THE FORECAST TRACK, THE CENTER OF THE POST-TROPICAL CYCLONE WILL  
APPROACH IRELAND TOMORROW MORNING. HOWEVER, STRONG WINDS AND RAINS  
SHOULD BEGIN EARLIER.  
 
MAXIMUM SUSTAINED WINDS ARE NEAR 90 MPH (150 KM/H) WITH HIGHER  
GUSTS. ADDITIONAL WEAKENING IS FORECAST, BUT OPHELIA SHOULD  
MAINTAIN HURRICANE FORCE WINDS UNTIL IT REACHES IRELAND.  
 
HURRICANE-FORCE WINDS EXTEND OUTWARD UP TO 45 MILES (75 KM) FROM THE  
CENTER AND TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 150 MILES  
(240 KM).  
 
THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 973 MB (28.74 INCHES).  
 
HAZARDS AFFECTING LAND  
----------------------  
WIND: GALE-FORCE WINDS ARE EXPECTED TO BEGIN ACROSS SOUTHERN  
IRELAND BY EARLY MONDAY MORNING AND GRADUALLY SPREAD NORTHWARD  
ACROSS THE COUNTRY DURING THE DAY. HURRICANE-FORCE WINDS ARE  
EXPECTED TO REACH THE SOUTHERN PORTIONS OF IRELAND BY MONDAY  
AFTERNOON AND SPREAD INLAND ACROSS THE COUNTRY INTO MONDAY NIGHT.  
PREPARATIONS TO PROTECT LIVES AND PROPERTY SHOULD BE RUSHED TO  
COMPLETION BY THIS AFTERNOON.  
 
WIND SPEEDS ATOP AND ON THE WINDWARD SIDES OF HILLS AND MOUNTAINS  
ARE OFTEN UP TO 30 PERCENT STRONGER THAN THE NEAR-SURFACE WINDS  
INDICATED IN THIS ADVISORY, AND IN SOME ELEVATED LOCATIONS COULD BE  
EVEN GREATER.  
 
RAINFALL: OPHELIA IS EXPECTED TO PRODUCE RAINFALL AMOUNTS OF 2 TO  
3 INCHES (50 MM TO 75 MM) WITH ISOLATED TOTALS NEAR 4 INCHES (100  
MM) THROUGH TUESDAY ACROSS WESTERN IRELAND AND SCOTLAND. ACROSS  
EASTERN IRELAND, RAINFALL AMOUNTS WILL AVERAGE AROUND 1 INCH (25 MM)  
OR LESS.  
 
STORM SURGE: A DANGEROUS STORM SURGE IS EXPECTED TO PRODUCE  
SIGNIFICANT COASTAL FLOODING NEAR AND TO THE EAST OF WHERE THE  
CENTER OF THE POST-TROPICAL CYCLONE MAKES LANDFALL. NEAR THE COAST,  
THE SURGE WILL BE ACCOMPANIED BY LARGE AND DESTRUCTIVE WAVES.  
 
NEXT ADVISORY  
-------------  
NEXT COMPLETE ADVISORY AT 500 PM AST.  
 

 
FORECASTER AVILA  
 
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