"Definitely we're looking at a good chance for heavy showers over there east of O'ahu," said Sam Houston, National Weather Service forecaster. The forecast calls for locally heavy showers and possible thunderstorms for Maui County and the Big Island.

Although the heavy rains were expected to pass Kaua'i and O'ahu, Houston said the forecast still calls for showers today. He said drier weather should return to Kaua'i beginning tomorrow and to O'ahu starting Saturday or Sunday.

"Things are going to improve here, definitely not as bad as we've seen the last couple of days," Houston said.

Kaua'i was hardest hit, as the storm flooded roads and rivers along the island's entire windward coast yesterday, contributing to two sewer line breaks that flowed into Kalapaki Bay and landslides that closed roads on the north shore.

Soil and shrubs clogged a sewer drain on the Pali near Kamehameha Highway after heavy rains yesterday. Deborah Booker • The Honolulu Advertiser

State health officials authorized the posting of no-swimming signs in Kalapaki Bay at Nawiliwili yesterday morning, after two sewer lines burst at the Kaua'i Marriott resort.

On O'ahu, a waterspout off Kalaeloa Barbers Point Harbor caused a lot of excitement but no damage.

"The waterspout was sighted at around 8:45 a.m.," said state Department of Transportation spokesman Scott Ishikawa.

"The harbor agent warned tenants and users to be prepared in case the waterspout headed headed to shore."

However, Ishikawa said it was his understanding that the waterspout remained offshore and dissipated at around 9:15 a.m., causing no damage.