WTPA33 PHFO 231759 TCPCP3 BULLETIN TROPICAL STORM DARBY INTERMEDIATE ADVISORY NUMBER 48A NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI EP052016 800 AM HST SAT JUL 23 2016 ...DARBY TRACKING SLOWLY TOWARD THE BIG ISLAND... SUMMARY OF 800 AM HST...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...18.8N 154.3W ABOUT 80 MI...130 KM SE OF HILO HAWAII ABOUT 295 MI...475 KM ESE OF HONOLULU HAWAII MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...W OR 275 DEGREES AT 9 MPH...15 KM/H MINIMUM CENTRAL PRESSURE...1002 MB...29.59 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. 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 A Tropical Storm Watch is in effect for... * Kauai A Tropical Storm Warning means that tropical storm conditions are expected within the warning area within 36 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area within 48 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 800 AM HST (1800 UTC), the center of Tropical Storm Darby was located by aircraft and radar near latitude 18.8 North, longitude 154.3 West. Darby is moving toward the west near 9 mph (15 km/h). Darby's forward motion is expected to slow slightly today followed by a gradual turn toward the northwest tonight and Sunday. On the forecast track, the center of Darby is forecast to pass over the Big Island later today and close to Maui County tonight. Darby will approach Oahu on Sunday and Kauai Monday. Maximum sustained winds are near 50 mph (85 km/h) with higher gusts. Some weakening is forecast during the next 48 hours. Tropical-storm-force winds extend outward up to 125 miles (205 km) from the center. The estimated minimum central pressure is 1002 mb (29.59 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Tropical storm force winds are expected over the Big Island today, over portions of Maui County this afternoon and evening, and over Oahu Sunday. Tropical storm force winds are possible over Kauai Monday. SURF: Swells generated by Darby are expected to impact the Hawaiian Islands over the next couple of days. RAINFALL: Storm total rainfall of 10 to 15 inches, with possible isolated maximum amounts of 20 inches. These rains could produce life-threatening flash floods and landslides. NEXT ADVISORY ------------- Next complete advisory at 1100 AM HST. $$ Forecaster Birchard