Showers move into the east end of state as disturbance passes

HONOLULU (KHON2) – A large area of surface high pressure approximately 1,400 miles from Oahu will remain anchored in nearly the same location through the week.

The pressure gradient from this high will remain tight enough to support areawide breezy to locally gusty trades through terrain gaps the next several days.

The high will weaken late this week as will the resultant trades. Precipitation will primarily be focused along windward areas with the bulk of the rain falling during the overnight hours.

Nighttime into early morning windward mauka showers will occasionally pass over the ridge tops and wetten leeward slopes or provide leeward sprinkles.

Higher mid level moisture over the eastern offshore waters (a greater than 2 inch pwat air mass) is noted in a wide swath of warmer low to mid level clouds moving toward the state this morning.

This area of deeper moisture and associated mid level trough will pass across Big Island and windward Maui County tonight into early Monday morning.

The depth of this higher moisture increases the probabilities that various windward Big Island and Maui County communities may experience bouts of brief heavy rain tonight.

While the moisture increase over the smaller islands is not expected to be as deep, a higher frequency of (predominantly windward) showers is likely.

Once mid level troughing washes out west of the state Tuesday, typical trade wind weather will return.

Less mid to late week diurnal rainfall is expected (in both frequency and areal coverage) as a drier air mass advects in.