WTPA33 PHFO 240243 TCPCP3 BULLETIN TROPICAL STORM DARBY ADVISORY NUMBER 50 NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI EP052016 500 PM HST SAT JUL 23 2016 ...DARBY MOVING OVER MAUNA LOA SLOPES... SUMMARY OF 500 PM HST...0300 UTC...INFORMATION ---------------------------------------------- LOCATION...19.3N 155.8W ABOUT 25 MI...40 KM SSE OF KAILUA-KONA HAWAII ABOUT 195 MI...310 KM SE OF HONOLULU HAWAII MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...W OR 275 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: A Tropical Storm Warning has been issued for Kauai County, including the islands of Kauai and Niihau. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Hawaii County * Maui County, including the islands of Maui, Molokai, Lanai and Kahoolawe * Oahu * Kauai County, including the islands of Kauai and Niihau A Tropical Storm Warning means that tropical storm conditions are expected within the warning area within 36 hours. In this case, tropical storm conditions are occurring over portions of the Big Island, and are expected over Maui County and Oahu within 24 hours. Interests in the eastern portion of the Papahanaumokuakea Marine National Monument should monitor the progress of Darby. For storm information specific to your area, please monitor products issued by the National Weather Service office in Honolulu. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ At 500 PM HST (0300 UTC), the center of Tropical Storm Darby was located near latitude 19.3 North, longitude 155.8 West. Darby is moving toward the west near 10 mph (17 km/h). Darby is forecast to make a turn toward the northwest later tonight and continue moving northwestward over the next 48 hours, with little change in forward speed. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Slight weakening is forecast during the next 48 hours. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. Sustained winds of 43 mph and wind gusts to 61 mph were been reported in Kohala Ranch on the Big Island earlier this afternoon. The estimated minimum central pressure is 1006 mb (29.71 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Tropical storm force winds are expected over the Big Island through this evening, over portions of Maui County tonight and Sunday, over Oahu Sunday and Sunday night, and over Kauai County Sunday night and Monday. SURF: Swells generated by Darby are expected to impact the Hawaiian Islands over the next day or so, with swells diminishing thereafter. RAINFALL: Storm total rainfall of 8 to 12 inches, with possible isolated maximum amounts of 15 inches. These rains could produce life-threatening flash floods and landslides. NEXT ADVISORY ------------- Next intermediate advisory at 800 PM HST. Next complete advisory at 1100 PM HST. $$ Forecaster Birchard
Paul Garrett Hugel
Technology Test Pilot
ORCID iD: 0000-0001-8082-7208 Paul Garrett Hugel on BlueSky @paul.nko.org
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