Accessed on 12 September 2018, 0438 UTC, Post #687.
Here’s the latest situation report on Tropical Storm Olivia from the Central Pacific Hurricane Center in Honolulu, Hawaii:
WTPA35 PHFO 120253 TCPCP5 BULLETIN Tropical Storm Olivia Advisory Number 46 NWS Central Pacific Hurricane Center Honolulu HI EP172018 500 PM HST Tue Sep 11 2018 ...CENTER OF OLIVIA APPROACHING MAUI COUNTY AND THE BIG ISLAND... SUMMARY OF 500 PM HST...0300 UTC...INFORMATION ---------------------------------------------- LOCATION...20.9N 154.2W ABOUT 100 MI...165 KM NE OF HILO HAWAII ABOUT 240 MI...385 KM E OF HONOLULU HAWAII MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...W OR 260 DEGREES AT 15 MPH...24 KM/H MINIMUM CENTRAL PRESSURE...1003 MB...29.62 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Kauai County...including the islands of Kauai and Niihau * Oahu * Maui County...including the islands of Maui, Molokai, Lanai, and Kahoolawe * Hawaii County Interests in the Northwest Hawaiian Islands should monitor the progress of Olivia. A Tropical Storm Warning means that tropical storm conditions are expected somewhere in the warning area within 36 hours. For storm information specific to your area, please monitor products issued by the National Weather Service office in Honolulu Hawaii. DISCUSSION AND OUTLOOK ---------------------- At 500 PM HST (0300 UTC), the center of Tropical Storm Olivia was located near latitude 20.9 North, longitude 154.2 West. Olivia is moving toward the west near 15 mph (24 km/h). A general west- southwest motion with a slower forward speed is expected this evening as the center of Olivia approaches Maui and the Big Island. After Olivia moves past the islands, a somewhat faster west- southwest motion is expected to resume amd continue for the next couple of days. Maximum sustained winds are near 50 mph (85 km/h) with higher gusts. Gradual weakening is forecast during the next 48 hours, but Olivia is expected to remain a tropical storm as it moves over the main Hawaiian Islands. Tropical-storm-force winds extend outward up to 105 miles (165 km), mainly to the north of the center. The estimated minimum central pressure is 1003 mb (29.62 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Tropical storm conditions are expected over portions of Maui County and the Big Island starting this evening. Tropical storm conditions are expected over Oahu starting tonight. Tropical storm conditions are expected over Kauai County starting Wednesday. Remember that wind gusts can be much stronger near higher terrain, particularly through gaps between mountains and where winds blow downslope. RAINFALL: Showers will continue to increase over portions of the main Hawaiian Islands tonight and Wednesday. Olivia is expected to produce total rainfall accumulations of 5 to 10 inches in some areas, with isolated maximum amounts of 15 inches possible, especially in higher terrain. This rainfall may produce life-threatening flash flooding. SURF: Large swells generated by Olivia will impact the main Hawaiian Islands over the next couple of days. This will result in dangerously high and potentially damaging surf, mainly along exposed east facing shores. NEXT ADVISORY ------------- Next intermediate advisory at 800 PM HST. Next complete advisory at 1100 PM HST. $$ Forecaster R Ballard ------------------ As of 1800 HST, gusty winds and light rain have started in Laupahoehoe along the Hamakua Coast. Olivia is moving toward the island of Maui where strong winds and heavy showers are expected. Stay safe. ------------------ Once Tropical Storm Olivia leaves the state we can focus on a fun contest activity that should help us forget recent storms and bad weather. The Fifth Annual Hawaiian Grid Madness is coming on Sunday, 16 September 2018, from 1300 to 1700 HST. The Aulani Hui Amateur Repeater Club sponsors this VHF/UHF simplex event "to test your equipment, coverage and operating skills using simplex FM on 2 meters and 70 cm." For details, please visit https://gridmadness.blogspot.com. ------------------ For the latest Amateur/Ham news and information, please check the blog sidebars and links. These news feeds are updated daily and weekly. Aloha es 73 de Russell Roberts (KH6JRM) Public Information Coordinator Hawaii County, ARRL Pacific Section