000 WTPA32 PHFO 260554 TCPCP2 BULLETIN Hurricane Douglas Intermediate Advisory Number 23A NWS Central Pacific Hurricane Center Honolulu HI EP082020 800 PM HST Sat Jul 25 2020 ...HURRICANE DOUGLAS DRAWING CLOSER TO HAWAII... SUMMARY OF 800 PM HST...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...20.1N 152.0W ABOUT 295 MI...475 KM ESE OF KAHULUI HAWAII ABOUT 390 MI...630 KM ESE OF HONOLULU HAWAII MAXIMUM SUSTAINED WINDS...90 MPH...145 KM/H PRESENT MOVEMENT...WNW OR 290 DEGREES AT 16 MPH...26 KM/H MINIMUM CENTRAL PRESSURE...982 MB...29 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY... None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A Hurricane Warning is in effect for... * Oahu A Tropical Storm Warning is in effect for... * Hawaii County * Maui County, including the islands of Maui, Lanai, Molokai and Kahoolawe * Kauai County, including the islands of Kauai and Niihau. A Hurricane Watch is in effect for... * Hawaii County * Maui County, including the islands of Maui, Lanai, Molokai and Kahoolawe A Tropical Storm Watch is in effect for... * Portions of the Papahanaumokuakea Marine National Monument from Nihoa to French Frigate Shoals. A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area within 36 hours. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within 24 to 36 hours. A Hurricane Watch means that hurricane conditions are possible within the watch area, in this case within the next 12 to 24 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area within the next 48 hours. Interests elsewhere in the Papahanaumokuakea Marine National Monument should monitor the progress of this system. For storm information specific to your area, please monitor products issued by the National Weather Service office in Honolulu Hawaii. DISCUSSION AND OUTLOOK ---------------------- At 800 PM HST (0600 UTC), the center of Hurricane Douglas was located near latitude 20.1 North, longitude 152.0 West. Douglas is moving toward the west-northwest near 16 mph (26 km/h). This motion is expected to continue through the next couple of days. On the forecast track, Douglas will be near the main Hawaiian Islands late tonight and is expected move near, or over, parts of the state Sunday and Sunday night. Maximum sustained winds are near 90 mph (150 km/h) with higher gusts. Gradual weakening is expected over the next couple of days. However, Douglas is still forecast to be near hurricane strength when it passes near the islands. Hurricane-force winds extend outward up to 35 miles (55 km) from the center and tropical-storm-force winds extend outward up to 115 miles (185 km). The estimated minimum central pressure is 982 mb (29.00 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Hurricane conditions are expected on Oahu on Sunday and are possible across Maui County and the Big Island on Sunday. Tropical Storm conditions are expected across Hawaii County and Maui County beginning late tonight or Sunday and across Kauai County Sunday night. SURF: Large swells generated by Douglas are expected to build tonight and affect the Hawaiian Islands Sunday into Monday, and storm surge of 2 to 4 feet above normal tides is expected near the center of Douglas. The large swells and surge will produce life threatening and potentially destructive surf along exposed shores. RAINFALL: Heavy rainfall associated with Douglas is expected to affect portions of the main Hawaiian Islands from late tonight into Monday. Total rain accumulations of 5 to 10 inches are possible from Maui County westward to Kauai County, with the greatest amounts in elevated terrain. This rain may result in life-threatening flash flooding and land slides, as well as rapid water level rises on small streams. Douglas could produce 2 to 5 inches of rainfall over the northern half of the Big Island. Key messages for Douglas can be found in the Tropical Cyclone Discussion under AWIPS header HFOTCDCP2 and WMO header WTPA32 PHFO. NEXT ADVISORY ------------- Next complete advisory at 1100 PM HST. $$ Forecaster Birchard