First Alert Forecast: Tracking some thunderstorms and passing showers tonight and Saturday

First Alert Forecast
Passing showers tonight into Saturday
Published: Mar. 21, 2022 at 3:11 AM HST|Updated: Feb. 3, 2023 at 10:30 PM HST
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HONOLULU (HawaiiNewsNow) - The rumble of thunder over the western end of the state tonight.

The dynamics of weather will support some brief heavy downpours. An upper low southwest of Kauai moving slowly towards the state. Meanwhile, a surface trough just northeast of Hawaii will be an axis of low level convergence across the western portion of the state tonight. Current radar shows steady moderate showers across Kauai and Oahu carried northeast to southwest by the breezy trade wind flow. Drier conditions currently persist across Maui County and the Big Island.

For tonight, expect persistent showers to continue across Kauai and Oahu with trades focusing more of the showers over windward slopes. The upper low will move eastward while the surface trough dissipates, resulting in the high pressure system to the north driving breezy trades and showers spreading to all islands later tonight into the weekend. While showers will be persistent, the trades should prevent them from remaining over the same areas for too long, and will not likely be issuing a Flood Watch. Nuisance flooding and ponding in areas are likely to occur within the heavier showers which may prompt Flood Advisories, but believe the threat will not match the watch/warning levels. Isolated thunderstorms embedded within the showers will be possible across the state into the weekend.A more typical trade wind weather pattern with passing windward showers and moderate to breezy trades will return late Sunday as the upper trough moves east of the area. High pressure to the northeast will keep shower activity more limited to windward and mountain areas.

Many weather models are showing enhanced windward and mauka showers. So just a heads up. Potentially heavy and potentially can cause some flooding with runoff perhaps Friday night into Saturday for the western end of the state.

Wishing you a beautiful start to 2023! Take in the beauty of the islands and blessings around you!

Here is to blue skies and much aloha throughout the new year!

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