Northwest swell increasing Tuesday night and peaking Wednesday

Weather Blog

Trade winds are the dominate force behind our weather becoming breezy and gusty today and again by the weekend.

The atmosphere is stable over the islands, and that will keep showers focused along windward slopes through much of the week.

The remnants of a front will keep windward Big Island somewhat wet, while leeward areas remain rather dry.

The trailing end of a weak front will bring an increase in mainly windward rainfall as it moves down the island chain Friday through the weekend.

The big weather headline will be large surf this week.

High surf warnings and advisories are posted for north and west shores. 

Surf along north facing shores will be rapidly building to 10 to 14 feet late this afternoon, then rising to 25 to 35 feet tonight and Wednesday.

Surf along west facing shores will be rapidly building to 6 to 9 feet late this afternoon, then rising to 18 to 24 feet tonight and Wednesday.

Surf along south facing shores will be 2 feet or less through Wednesday.

Surf along east facing shores will be 2 to 4 feet today, increasing to 3 to 5 feet on Wednesday.

As far as the Honolulu Marathon on Sunday, expect partly sunny skies with a few passing windward showers.  Winds will be strong however, with sustained winds to 30 mph.

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