KHON posted the following update at 5:47 pm Wednesday (3/18):
Heavier showers are expected to move into Kauai and Oahu on Thursday, with increasing showers for all islands through Sunday. Comparatively speaking, the Kona low that swept through the islands last weekend is more potent than this second incoming storm. However, it still packs a punch with heavy rain and possible thunderstorms focusing in particular over Oahu, Molokai, Lanai and Maui. A flood watch begins Thursday afternoon through Sunday afternoon.
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The National Weather Service posted the following update at 2:59 PM HST Wednesday (3/18):
FLOOD WATCH FOR OAHU, MOLOKAI, MAUI, AND THE BIG ISLAND FROM 6PM HST THURSDAY TO 6PM HST SUNDAY
* WHAT…Flash flooding caused by excessive rainfall is possible.
* WHERE…The islands of Oahu, Maui, Molokai, and the Big Island.
* WHEN…From Thursday evening through Sunday afternoon.
* IMPACTS…Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams. Urban areas may receive more significant flooding and property damage due to rapid runoff.
* ADDITIONAL DETAILS…
– A kona low developing west of the islands will draw abundant moisture northward as it strengthens and eventually departs to north early next week. Several rounds of moderate to heavy rainfall are anticipated. The heaviest rain is expected Friday night through Saturday.
PRECAUTIONARY/PREPAREDNESS ACTIONS…
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
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