Hilo
Tonight: Partly cloudy with isolated showers. Lows 62 to 68 near the shore to 48 to 55 at 4000 feet. West winds up to 10 mph. Chance of rain 20 percent.
Sunday: Mostly sunny with isolated showers. Highs 79 to 84 near the shore to 65 to 70 at 4000 feet. East winds up to 15 mph. Chance of rain 20 percent.
Sunday Night: Partly cloudy with scattered showers. Lows 62 to 69 near the shore to 49 to 55 at 4000 feet. Northwest winds up to 10 mph. Chance of rain 30 percent.
Then
Tonight: Mostly clear. Lows 69 to 74 near the shore to 45 to 51 near 5000 feet. Light winds.
Sunday: Sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 86 near the shore to around 67 near 5000 feet. West winds up to 10 mph. Chance of rain 20 percent.
ARTICLE CONTINUES BELOW AD
ARTICLE CONTINUES BELOW AD
Sunday Night: Mostly clear. Lows around 71 near the shore to 45 to 51 near 5000 feet. Light winds.
Got a lot
Tonight: Breezy. Partly cloudy with isolated showers. Lows 60 to 69 near the shore to 52 to 60 near 3000 feet. East winds up to 20 mph. Chance of rain 20 percent.
Sunday: Breezy. Mostly sunny with isolated showers. Highs around 80 near the shore to 71 to 78 near 3000 feet. East winds up to 20 mph increasing to 10 to 20 mph in the afternoon. Chance of rain 20 percent.
Sunday Night: Breezy. Partly cloudy with isolated showers. Lows 61 to 70 near the shore to 52 to 60 near 3000 feet. East winds up to 20 mph. Chance of rain 20 percent.
Kohala
Tonight: Breezy. Partly cloudy with isolated showers. Lows 60 to 69 near the shore to 52 to 60 near 3000 feet. East winds up to 20 mph. Chance of rain 20 percent.
ARTICLE CONTINUES BELOW AD
Sunday: Breezy. Mostly sunny with isolated showers. Highs around 80 near the shore to 71 to 78 near 3000 feet. East winds up to 20 mph increasing to 10 to 20 mph in the afternoon. Chance of rain 20 percent.
Sunday Night: Breezy. Partly cloudy with isolated showers. Lows 61 to 70 near the shore to 52 to 60 near 3000 feet. East winds up to 20 mph. Chance of rain 20 percent.
South Big Island
Tonight: Mostly clear. Breezy. Lows around 72 near the shore to around 50 near 5000 feet. Northeast winds 10 to 20 mph.
Sunday: Breezy. Sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 86 near the shore to around 67 near 5000 feet. East winds 10 to 20 mph decreasing to up to 20 mph in the afternoon. Chance of rain 20 percent.
Sunday Night: Mostly clear. Breezy. Lows around 72 near the shore to around 50 near 5000 feet. Northeast winds up to 20 mph increasing to 10 to 20 mph after midnight.
Puna
ARTICLE CONTINUES BELOW AD
Tonight: Partly cloudy with isolated showers. Lows 62 to 68 near the shore to 48 to 55 at 4000 feet. West winds up to 10 mph. Chance of rain 20 percent.
Sunday: Mostly sunny with isolated showers. Highs 79 to 84 near the shore to 65 to 70 at 4000 feet. East winds up to 15 mph. Chance of rain 20 percent.
Sunday Night: Partly cloudy with scattered showers. Lows 62 to 69 near the shore to 49 to 55 at 4000 feet. Northwest winds up to 10 mph. Chance of rain 30 percent.
Waikoloa
Tonight: Mostly clear. Lows 69 to 74 near the shore to 47 to 53 above 4000 feet. Southeast winds up to 15 mph.
Sunday: Sunny. Highs 82 to 88 near the shore to 63 to 72 above 4000 feet. Northeast winds up to 15 mph.
Sunday Night: Mostly clear. Lows 69 to 75 near the shore to 48 to 54 above 4000 feet. Southeast winds up to 15 mph.
Synopsis
Locally breezy trades will deliver clouds and showers to windward and mauka areas through next week.
Discussion
Water vapor imagery indicates ample mid-level dry air established over the islands in association with a corridor of active subsidence. This is evident on this afternoon’s soundings out of Hilo and Lihue which are extremely stable and imply a gently sloped inversion from around 6kft at Lihue to 5kft at Hilo. At the surface, this translates to a relatively dry and stable trade wind pattern. Upstream visible imagery suggests little moisture embedded in upstream trades which increases confidence in maintaining a forecast on the drier side of climatology. Benign, locally breezy trade wind weather prevails through the next week as mid-level ridging persists. Slight increase in available moisture occurs coincident with an approaching weak frontal zone during mid-week offering potential for increased coverage of trade wind showers, mainly windward and mauka.
Aviation
Moderate to locally breezy east southeast flow will limit most shower activity to windward and mauka locations this evening into tonight with brief periods of MVFR conditions from low cigs and visibly. Otherwise, VFR should prevail.
This breezy east southeast flow pattern may generate low level wind shear/turbulence at Kahului airport through late afternoon.
AIRMET Tango is in effect for mod turb below 070 for all islands and will likely be needed for a few days.
Marine
High pressure northeast of the islands and a surface ridge will drive fresh to strong easterly trade winds through the rest of the weekend. A slight decrease is possible over the western end of the state late Sunday into Monday as a front passes far north of the area. A stronger high and ridge will then develop Monday night through midweek, strengthening trade winds back into the fresh to strong range. Advisory-level winds should continue over the windier marine zones around Maui County and the Big Island, with an expansion of stronger trades to additional waters from Tuesday through midweek.
Surf along south-facing shores will lower gradually tonight into Sunday as the current south swell declines. A fresh, long- period south-southwest swell (1 foot, 19 seconds) is expected to arrive by Sunday night, peaking Monday into Tuesday, with surf returning to around average. A gradual downward trend is expected from late Tuesday through midweek.
Surf along east-facing shores will hold steady near seasonal averages through next week due to the persistent trades.
Surf along north-facing shores will gradually ease over the weekend as a medium-period north-northwest swell fades. A series of small northwest swells next week will keep surf from going flat. Friday could see a small to medium north swell.
HFO Watches/Warnings/Advisories
Small Craft Advisory until 6 AM HST Sunday for Maui County Windward Waters.
Small Craft Advisory until 6 PM HST Monday for Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters.
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Data Courtesy of NOAA.gov
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