{"id":95,"date":"2026-05-15T05:34:51","date_gmt":"2026-05-15T05:34:51","guid":{"rendered":"https:\/\/hawaiimovinginsider.com\/?p=95"},"modified":"2026-05-15T05:34:51","modified_gmt":"2026-05-15T05:34:51","slug":"first-alert-forecast-tracking-periods-of-heavy-rain-friday-into-saturday","status":"publish","type":"post","link":"https:\/\/hawaiimovinginsider.com\/?p=95","title":{"rendered":"First Alert Forecast: Tracking periods of heavy rain Friday into Saturday"},"content":{"rendered":"<div>\n<section>\n<p>HONOLULU (HawaiiNewsNow) &#8211; Could some thunderstorms be firing up? A first alert heads up, periods of heavy rain possible for Friday into Saturday as an upper-level disturbance nears the islands.<\/p>\n<p>Read more <a href=\"https:\/\/hawaiimovinginsider.com\/?p=93\">Hawaii ocean safety officials look to robots to help save lives<\/a><\/p>\n<p>Breezy trade winds will continue across Hawaii into tonight, keeping the usual pattern of passing showers focused over windward and mauka communities. Conditions will stay fairly typical through this evening, though the atmosphere is becoming more unstable as an upper-level low approaches the islands from the north.<\/p>\n<p>Friday is shaping up to be the most active weather day of the week. A cold upper-level disturbance moving directly over Kauai will create enough instability for heavier showers and even isolated thunderstorms, especially over Oahu and parts of Maui County. <\/p>\n<p>Forecasters are watching the possibility of moisture streaming into Oahu from the southeast during the late morning and afternoon, which could allow bands of heavy rain to repeatedly move over the same areas. If that setup develops, localized flooding could become a concern and some ponding on our roads.<\/p>\n<div><\/div>\n<p>There is still a large amount of uncertainty in exactly where the heaviest rain will develop. Some forecast models show only scattered showers, while others suggest stronger afternoon downpours with isolated thunderstorms and localized flooding. The ingredients are coming together with cold air aloft to trigger heavier rain. Because of that uncertainty, no Flood Watch has been issued yet, but residents should stay alert for changing weather conditions Friday, especially in flood-prone locations and near streams.<\/p>\n<p>Read more <a href=\"https:\/\/hawaiimovinginsider.com\/?p=91\">UH women\u2019s sailing team heads to nationals as head coach retires<\/a><\/p>\n<p>The wetter pattern will likely continue through the weekend as deep tropical moisture increases across the state. Windward and mauka areas are expected to see the most persistent showers, with the Big Island potentially seeing periods of heavier rain by late Saturday into Sunday. Thunderstorm chances should gradually decrease over the weekend as the upper low weakens and drifts away.<\/p>\n<p>Marine conditions remain rough due to locally strong trades, particularly around Maui County and the Big Island where a Small Craft Advisory remains in effect through early Friday morning. North shores are seeing elevated surf from a northwest swell that peaked today and will slowly decline into the weekend. South shore surf will remain small but should gradually build closer to seasonal averages next week as a series of southern swells arrive.<\/p>\n<p>Looking ahead, Hawaii is expected to return to a more typical trade wind weather pattern sometime next week, though lingering windward showers will continue at times.<\/p>\n<p>View the latest weather conditions here.<\/p>\n<p><i>Download the HNN Weather app from the <\/i><i>Apple App Store<\/i><i> or <\/i><i>Google Play<\/i><i> for the latest updates from your First Alert Weather Team: chief meteorologist Jennifer Robbins, meteorologist Drew Davis, and weather anchors Guy Hagi, Ben Gutierrez, and Billy V. <\/i><\/p>\n<p>Read more <a href=\"https:\/\/hawaiimovinginsider.com\/?p=89\">Maui storm survivor warns of scams after losing $600<\/a><\/p>\n<\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Could some thunderstorms be firing up? A first alert heads up, periods of heavy rain possible for Friday into Saturday as an upper-level disturbance nears the islands.<\/p>\n","protected":false},"author":1,"featured_media":94,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-95","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>First Alert Forecast: Tracking periods of heavy rain Friday into Saturday - Hawaii Moving Insider<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hawaiimovinginsider.com\/?p=95\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"First Alert Forecast: Tracking periods of heavy rain Friday into Saturday - Hawaii Moving Insider\" \/>\n<meta property=\"og:description\" content=\"Could some thunderstorms be firing up? 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