The National Weather Service in Honolulu has issued a flash flood warning for portions of the Kona Coast on the island of Hawaii through 8:45 Tuesday night. At 548 PM HST, radar and rain gauge data shows very heavy rains along the leeward slopes of the Big Island, extending from Waikoloa Village southward to Honaunau. A rain gauge along Waiaha Stream recently reported rainfall rates of 4 inches per hour, and radar estimates show widespread hourly rainfall rates of 2 to 4 inches in the warning area. Flash flooding is likely ongoing or will begin very shortly within the warning area. Locations in the warning include but are not limited to Kailua-Kona, Kealakekua, Honalo, Captain Cook, Puuanahulu, Kalaoa, Honaunau, Kahaluu-Keauhou, Kainaliu, Waikoloa Village and Holualoa.
Elsewhere scattered showers are moving into windward areas of all islands.
A high far northeast of the state will remain nearly stationary and weaken. Trade winds will be replaced with light and variable winds on Wednesday night as a cold front approaches the islands.
A front far northwest of the islands will move southeast, reaching Kauai Saturday night and pushing south of the Big Island on Sunday. A new high will build north of the area behind the front, returning trade winds to the islands.
For the Bruno Mars concerts, no heavy rain is expected. Temperatures may feel a bit chilly for Hawaii standards on Saturday and Sunday.