Quantcast

Wednesday, July 23, 2014         

 Print   Email   Comment | View 0 Comments   Most Popular   Save   Post   Retweet

Flood advisory lifted for Big Island, tradewinds should return

By Star-Advertiser staff

POSTED:
LAST UPDATED: 05:07 p.m. HST, May 03, 2011


Reader submitted weather photos

 

The National Weather Service lifted a flood advisory for the Big Island at about 5 p.m. this afternoon as an unstable weather system that delivered impressive thunder and lightning last night gradually gives way to a return of the tradewinds.

The National Weather Service said early this afternoon that rain was falling at 2 inches an hour along the coast and lower slopes of the Leeward Big Island. 

The rain may be the last gasp of the system that lit up the skies of Oahu last night.

The weather service reported hail, waterspouts, road flooding, and heavy thunderstorms. About 60,00 Hawaiian Electric Co. customers on Oahu were without power for a few hours yesterday evening and company officials suspect lightning strikes caused the outage. The outage knocked out many traffic signals, making the evening commute a slow, sloggy mess for East Oahu and Windward motorists.

The weather service said a surface high far northeast of the islands will help weaken the weather system and will produce locally breezy trade winds tonight, and into the weekend.

Earlier flood advisories for Oahu and Kauai were canceled this morning.

"When the stronger tradewinds come in, the thunderstorms aren't going to be able to sit in one place like they did last night," said forecaster Ian Morrison.

If skies remain cloudy this morning, that will also lessen the chance of heavy thunderstorms because surface temperatures will be cooler, Morrison said.

The temperature in the upper atmosphere is at minus 12 degrees, he said, while surface temperatures are in the 80s. The thunderstorms are generated when moist, warm air rises because of ground heating and hits the cold upper atmosphere. The temperature difference causes the warm air to rise faster and releases more energy, Morrison said.

The upper atmosphere temperatures are cold enough for snow on the Big Island summits, where a winter weather advisory is in effect until 9 a.m. Wednesday with "freezing drizzle fog."

The weather service says the tradewind weather should last through Friday, but that unstable weather, similar to yesterday's, could return this weekend.







 Print   Email   Comment | View 0 Comments   Most Popular   Save   Post   Retweet

COMMENTS
(0)
You must be subscribed to participate in discussions
By participating in online discussions you acknowledge that you have agreed to the TERMS OF SERVICE. An insightful discussion of ideas and viewpoints is encouraged, but comments must be civil and in good taste, with no personal attacks. Because only subscribers are allowed to comment, we have your personal information and are able to contact you. If your comments are inappropriate, you may receive a warning, and if you persist with such comments you may be banned from posting. To report comments that you believe do not follow our guidelines, email commentfeedback@staradvertiser.com.
Leave a comment

Please login to leave a comment.
IN OTHER NEWS
Breaking News