ZCZC HFOTCPCP1 ALL TTAA00 PHFO DDHHMM BULLETIN Hurricane Walaka Intermediate Advisory Number 9A NWS Central Pacific Hurricane Center Honolulu HI CP012018 200 PM HST Mon Oct 01 2018 ...HURRICANE WALAKA REACHES CATEGORY 5 ON THE SAFFIR-SIMPSON SCALE... SUMMARY OF 200 PM HST...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...12.9N 169.6W ABOUT 265 MI...425 KM S OF JOHNSTON ISLAND ABOUT 965 MI...1555 KM SW OF HONOLULU HAWAII MAXIMUM SUSTAINED WINDS...160 MPH...260 KM/H PRESENT MOVEMENT...WNW OR 295 DEGREES AT 9 MPH...15 KM/H MINIMUM CENTRAL PRESSURE...920 MB...27.17 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Johnston Atoll A Hurricane Warning means that hurricane conditions are expected in the warning area. A warning is typically issued 36 hours before the anticipated first occurrence of tropical-storm force winds, conditions that make outside preparations difficult or dangerous. Interests in the Papahanaumokuakea Marine National Monument should monitor the progress of Walaka. DISCUSSION AND OUTLOOK ---------------------- At 200 PM HST (0000 UTC), the eye of Hurricane Walaka was located near latitude 12.9 North, longitude 169.6 West. Walaka is moving toward the west-northwest near 9 mph (15 km/h). A turn toward the north is expected late tonight through Tuesday with a gradual increase in forward speed. On the forecast track, the center of Walaka is expected to pass just to the west of Johnston Island on Tuesday. Maximum sustained winds are near 160 mph (260 km/h) with higher gusts. Walaka is a category 5 hurricane on the Saffir-Simpson Hurricane Wind Scale. Some strengthening is expected through early Tuesday before Walaka starts a gradual weakening trend. Hurricane-force winds extend outward up to 50 miles (85 km) from the center and tropical-storm-force winds extend outward up to 185 miles (300 km). The estimated minimum central pressure is 920 mb (27.17 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Tropical storm force winds are expected across Johnston Island starting late tonight or early Tuesday, with hurricane conditions expected by Tuesday afternoon. SURF: Large surf will affect the Johnston Island reefs and shorelines starting later today. RAINFALL: Heavy rainfall associated with Walaka is expected to reach Johnston Atoll late today or tonight. NEXT ADVISORY ------------- Next complete advisory at 500 PM HST. $$ Forecaster Kodama NNNN