FORECAST DISCUSSION: The start of winter for the United States has already proved to be an impressive one, and despite Hawai’i’s mild weather year-round, it does not disappoint to bring an intriguing forecast to the island chain. The islands have seen unsettled weather patterns in recent days, and it isn’t expected to improve within the immediate forecast period.
Winter often brings slightly cooler temperatures, with a wet pattern, and it has not failed to show itself. West of the island chain an area of low pressure, which is expected to propagate northeastward, will pump in winds from the south. In recent days, high wind advisories have been issued and this forecast period proves no different. Beginning Tuesday afternoon through Wednesday a High Wind Watch is in effect for Kauai Windward-Kauai Mountains-Oahu North Shore-Oahu Koolau-Olomana-Central Oahu-Waianae Mountains. In fact, there is a High Surf Advisory until 6 AM HST Tuesday for Kauai Windward-Oahu Koolau-Olomana-Molokai Windward-Maui Windward West-Windward Haleakala-South Big Island-Big Island North and East. These winds have the potential to cause damage and power outages of note in downslope mountainous areas of Oahu and Kauai. As the front moves eastward, its strength will decrease significantly towards the Big Island and will generate a more typical trade wind pattern as high pressure moves in behind the front.
In addition to concerns with the immediate weather pattern the National Weather Service (NWS) has issued a special weather statement regarding coastal flooding coupled with strong southerly winds. With high water levels being apparent around the Hawaiian Islands, coastal flooding is possible over the next few days, but chances for coastal flooding reduce in the latter part of the week when the high-pressure system with trade wind pattern are expected to return.
For more on various forecasts and winter weather visit the Global Weather and Climate Center!
© 2019 Meteorologist Jessica Olsen