TCPCP1 07:46:50.1494

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----------200 AM HST Wed Oct 03 2018
...DANGEROUS HURRICANE WALAKA INTENSIFIES AS IT MOVES RAPIDLY NORTH TOWARD THE PAPAHANAUMOKUAKEA MARINE NATIONAL MONUMENT... ...JOHNSTON ATOLL REMAINS IN THE SOUTH QUADRANT OF WALAKA...
 SUMMARY OF 200 AM HST...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...18.9N 169.8W ABOUT 150 MI...240 KM N OF JOHNSTON ISLAND ABOUT 410 MI...660 KM SW OF FRENCH FRIGATE SHOALS MAXIMUM SUSTAINED WINDS...140 MPH...225 KM/H PRESENT MOVEMENT...N OR 10 DEGREES AT 14 MPH...23 KM/H MINIMUM CENTRAL PRESSURE...944 MB...27.88 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 * Papahanaumokuakea Marine National Monument from French Frigate Shoals to Maro Reef
A Tropical Storm Warning is in effect for... * Papahanaumokuakea Marine National Monument from Nihoa to French Frigate Shoals
A Hurricane Warning indicates that hurricane conditions are expected in the warning area starting later today or tonight.
A Tropical Storm Warning indicates that tropical storm conditions are expected within the warning area starting later today or tonight.
 DISCUSSION AND OUTLOOK ---------------------- At 200 AM HST (1200 UTC), the center of Hurricane Walaka was located near latitude 18.9 North, longitude 169.8 West. Walaka is moving toward the north near 14 mph (23 km/h), and it is expected to turn toward the north-northeast with a faster forward motion later today and tonight. Walaka is forecast to turn toward the north with a slower forward speed starting Thursday. On this forecast track, the center of Walaka will likely reach the Papahanaumokuakea Marine National Monument tonight.
Maximum sustained winds are now near 140 mph (225 km/h) with higher gusts. Walaka remains a dangerous category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Some gradual weakening is possible starting from today or tonight through Thursday, but Walaka is forecast to remain a powerful hurricane when it crosses the Papahanaumokuakea Marine National Monument tonight.
Hurricane-force winds extend outward up to 40 miles (65 km) from the center and tropical-storm-force winds extend outward up to 185 miles (295 km).
The estimated minimum central pressure is 944 mb (27.88 inches).
 HAZARDS AFFECTING LAND ---------------------- WIND: Hurricane conditions will persist on Johnston Atoll this morning, with conditions gradually improving later today. Tropical storm force winds are expected across the Papahanaumokuakea Marine National Monument from Nihoa to French Frigate Shoals to Maro Reef beginning this afternoon, with hurricane conditions expected over portions of the area between French Frigate Shoals and Maro Reef starting later today or tonight.
SURF: Large surf associated with Walaka will continue to affect Johnston Atoll today. Large surf will likely begin to impact the Papahanaumokuakea Marine National Monument in a few hours. These large waves will likely inundate some of the low-lying atolls, especially from French Frigate Shoals to Maro Reef.
RAINFALL: Torrential rainfall associated with Walaka will continue across Johnston Atoll this morning, and will likely begin to spread across the Papahanaumokuakea Marine National Monument from Nihoa to French Frigate Shoals to Maro Reef later today, and continue through tonight.
 NEXT ADVISORY ------------- Next complete advisory at 500 AM HST.
$$ Forecaster Houston
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