HONOLULU (KHON2) — As of the 11 a.m. update from the Central Pacific Hurricane Center, Calvin is now a post-tropical low with sustained winds of 40 mph and gusts of 50 mph. What does that mean? It means that Calvin no longer has tropical characteristics. The winds are still blowing at tropical storm strength. They simply cannot technically call it a tropical cyclone anymore. They can also safely say that it will not develop into a tropical cyclone again. The CPHC will not issue any further updates for this storm.
The remnants of Calvin continue to move almost due west (275°) at 20 mph. The storm is expected to continue to gradually weaken as it presses west. As it weakens and moves west, the impacts to Hawaii will gradually diminish through Wednesday morning and afternoon.
The large area of instability that was north of Calvin over the last few days dissipated between Tuesday afternoon and early Wednesday which reduced the amount of rain Hawaii was expected to get. Instead of 8” to 12” of rain, areas along the Hamakua Coast and the southern slopes of the Big Island saw anywhere from 3” to 8” of rain, most of which fell during Tuesday night and Wednesday morning. The only flood warning issued by the National Weather Service Wednesday morning was for portions of southern Big Island. There was also a flood advisory issued for central portions of Oahu, Maui and the Big Island–a flood advisory is issued when there are possible areas of flooding. A flash flood warning is issued when flooding is occurring or imminent.
Although some more rain is expected through today, the impacts to the state should lessen as we go through Wednesday afternoon. The primary threats are still the potential for flooding, the high wind speeds and the high surf.
Expected impacts for the Big Island
-Flooding: with saturated grounds, continued rain may flood certain areas. A Flood Watch is in effect through Wednesday afternoon.
-Winds: wind speeds should diminish but winds 20-35 with higher gusts are still possible. Saturated ground may still cause downed trees and power lines.
-High surf on east facing shores: Surf along east facing shores continues to be a threat. A High Surf Warning is in effect until 6 p.m. Wednesday evening with surf heights 14ft to 18ft possible.
Expected impacts for Maui County are
-High Winds: A High Wind Warning is in effect for Maui County until 6 p.m. Wednesday. Winds 40-55mph with gusts around 70 mph are possible.
-Flooding: with saturated grounds, continued rain may flood certain areas. A Flood Watch is in effect through Wednesday afternoon.
-High surf on east facing shores: Surf along east facing shores continues to be a threat. A High Surf Warning is in effect until 6 p.m. Wednesday evening with surf heights 14ft-18ft possible.
Expected impacts for Oahu and Kauai are
-Moderate to High Winds: A Wind Advisory is in effect for Oahu and Kauai until 6 p.m. Wednesday. Northeast winds 30-35mph with gusts around 50 mph are possible.
-High surf on east facing shores: High surf along east facing shores continues to be a threat. A High Surf Advisory is in effect until 6 p.m. Wednesday evening with surf heights 8ft-12ft possible.
-Flooding: with saturated grounds, continued rain may flood certain areas on Oahu and Kauai. A Flood Watch is in effect through Wednesday afternoon.