WTPA35 PHFO 201437 TCPCP5 BULLETIN HURRICANE OLAF ADVISORY NUMBER 23 NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI EP192015 500 AM HST TUE OCT 20 2015 ...OLAF A POWERFUL CATEGORY FOUR HURRICANE WELL EAST-SOUTHEAST OF HAWAII... SUMMARY OF 500 AM HST...1500 UTC...INFORMATION ---------------------------------------------- LOCATION...10.6N 141.3W ABOUT 1115 MI...1790 KM ESE OF HILO HAWAII ABOUT 1325 MI...2130 KM ESE OF HONOLULU HAWAII MAXIMUM SUSTAINED WINDS...150 MPH...240 KM/H PRESENT MOVEMENT...WNW OR 285 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...938 MB...27.70 INCHES WATCHES AND WARNINGS -------------------- THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ AT 500 AM HST...1500 UTC...THE CENTER OF HURRICANE OLAF WAS LOCATED NEAR LATITUDE 10.6 NORTH...LONGITUDE 141.3 WEST. OLAF IS MOVING TOWARD THE WEST-NORTHWEST NEAR 10 MPH...17 KM/H...AND THIS MOTION IS EXPECTED TO CONTINUE INTO TONIGHT. A TURN TOWARD THE NORTHWEST ON WEDNESDAY IS EXPECTED TO CONTINUE INTO THURSDAY. MAXIMUM SUSTAINED WINDS ARE NEAR 150 MPH...240 KM/H...WITH HIGHER GUSTS. OLAF IS A CATEGORY FOUR HURRICANE ON THE SAFFIR-SIMPSON HURRICANE WIND SCALE. SOME FLUCTUATIONS IN INTENSITY ARE EXPECTED THROUGH TONIGHT...WITH A GRADUAL WEAKENING TREND EXPECTED WEDNESDAY INTO THURSDAY. HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 40 MILES...65 KM...FROM THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 140 MILES...220 KM. THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 938 MB...27.70 INCHES. HAZARDS AFFECTING LAND ---------------------- SURF...LARGE SWELLS GENERATED BY OLAF WILL BEGIN TO ARRIVE 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...1100 AM HST. $$ FORECASTER BIRCHARD