WTPA35 PHFO 210837 TCPCP5 BULLETIN HURRICANE OLAF ADVISORY NUMBER 26 NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI EP192015 1100 PM HST TUE OCT 20 2015 ...POWERFUL OLAF WEAKENS SLIGHTLY FAR SOUTHEAST OF HAWAII... SUMMARY OF 1100 PM HST...0900 UTC...INFORMATION ----------------------------------------------- LOCATION...11.5N 143.8W ABOUT 940 MI...1515 KM SE OF HILO HAWAII ABOUT 1150 MI...1855 KM SE OF HONOLULU HAWAII MAXIMUM SUSTAINED WINDS...135 MPH...215 KM/H PRESENT MOVEMENT...WNW OR 300 DEGREES AT 9 MPH...15 KM/H MINIMUM CENTRAL PRESSURE...952 MB...28.12 INCHES WATCHES AND WARNINGS -------------------- THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ AT 1100 PM HST...0900 UTC...THE CENTER OF HURRICANE OLAF WAS LOCATED NEAR LATITUDE 11.5 NORTH...LONGITUDE 143.8 WEST. OLAF IS MOVING TOWARD THE WEST-NORTHWEST NEAR 9 MPH...15 KM/H...AND THIS MOTION IS EXPECTED TO CONTINUE TONIGHT. A TURN TOWARD THE NORTHWEST ON WEDNESDAY WILL BE FOLLOWED BY A TURN TOWARD THE NORTH-NORTHWEST ON THURSDAY. MAXIMUM SUSTAINED WINDS ARE NEAR 135 MPH...215 KM/H...WITH HIGHER GUSTS. OLAF IS A CATEGORY FOUR HURRICANE ON THE SAFFIR-SIMPSON HURRICANE WIND SCALE. LITTLE CHANGE IN INTENSITY IS EXPECTED THROUGH TONIGHT...WITH GRADUAL WEAKENING FORECAST FROM WEDNESDAY THROUGH THURSDAY. HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 35 MILES...55 KM...FROM THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 140 MILES...220 KM. THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 952 MB...28.12 INCHES. HAZARDS AFFECTING LAND ---------------------- SURF...LARGE SWELLS GENERATED BY OLAF WILL BUILD ALONG EAST FACING SHORES OF THE MAIN HAWAIIAN ISLANDS OVER THE NEXT COUPLE OF DAYS. RESULTANT HAZARDOUS SURF WILL BE LARGE...POTENTIALLY LIFE-THREATENING AND DAMAGING. SEE PRODUCTS ISSUED BY THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN HONOLULU FOR DETAILS. NEXT ADVISORY ------------- NEXT COMPLETE ADVISORY...500 AM HST. $$ FORECASTER BIRCHARD