Hawaii County Weather Forecast for May 02, 2022

Hilo

Today: Showers and slight chance of thunderstorms. Locally heavy rainfall possible. Highs 75 to 80 near the shore to around 63 at 4000 feet. Northeast winds up to 15 mph. Chance of rain near 100 percent.

Tonight: Cloudy with showers. Locally heavy rainfall possible. Lows 62 to 69 near the shore to 52 to 57 at 4000 feet. Northeast winds up to 10 mph increasing to 10 to 15 mph after midnight. Chance of rain 90 percent.

Tuesday: Mostly cloudy. Showers in the morning, then showers likely in the afternoon. Locally heavy rainfall possible in the morning. Highs 75 to 80 near the shore to around 64 at 4000 feet. Northeast 10 to 15 mph. Chance of rain 80 percent.

Kona

Today: Mostly cloudy. Isolated showers and thunderstorms in the morning, then scattered showers and slight chance of thunderstorms in the afternoon. Highs 81 to 86 near the shore to around 65 near 5000 feet. Light winds. Chance of rain 50 percent.

Tonight: Mostly cloudy with isolated showers. Lows 67 to 72 near the shore to 47 to 54 near 5000 feet. Light winds. Chance of rain 20 percent.

ARTICLE CONTINUES BELOW AD

Tuesday: Partly sunny. Scattered showers in the afternoon. Highs 80 to 85 near the shore to around 65 near 5000 feet. Light winds. Chance of rain 40 percent.

Waimea

ARTICLE CONTINUES BELOW AD

Today: Breezy. Showers and slight chance of thunderstorms. Locally heavy rainfall possible. Highs 61 to 82. East Southeast 10 to 25 mph. Chance of rain near 100 percent.

Tonight: Breezy. Mostly cloudy with showers likely. Lows around 63 near the shore to 53 to 61 near 3000 feet. Northeast 15 to 25 mph. Chance of rain 70 percent.

Tuesday: Breezy. Mostly cloudy with showers likely. Highs 62 to 83. East Southeast 15 to 25 mph. Chance of rain 70 percent.

Kohala

ARTICLE CONTINUES BELOW AD

Today: Breezy. Showers and slight chance of thunderstorms. Locally heavy rainfall possible. Highs 61 to 82. East Southeast 10 to 25 mph. Chance of rain near 100 percent.

Tonight: Breezy. Mostly cloudy with showers likely. Lows around 63 near the shore to 53 to 61 near 3000 feet. Northeast 15 to 25 mph. Chance of rain 70 percent.

Tuesday: Breezy. Mostly cloudy with showers likely. Highs 62 to 83. East Southeast 15 to 25 mph. Chance of rain 70 percent.

South Big Island

Today: Mostly cloudy. Breezy. Isolated showers and thunderstorms in the morning, then scattered showers and slight chance of thunderstorms in the afternoon. Highs around 80 near the shore to around 63 near 5000 feet. East winds up to 25 mph. Chance of rain 40 percent.

Tonight: Breezy. Mostly cloudy with isolated showers. Lows around 70 near the shore to around 50 near 5000 feet. Southeast 10 to 20 mph. Chance of rain 20 percent.

Tuesday: Partly sunny. Breezy. Isolated showers in the morning, then scattered showers in the afternoon. Highs around 81 near the shore to around 64 near 5000 feet. Southeast 10 to 20 mph. Chance of rain 40 percent.

Puna

Today: Showers and slight chance of thunderstorms. Locally heavy rainfall possible. Highs 75 to 80 near the shore to around 63 at 4000 feet. Northeast winds up to 15 mph. Chance of rain near 100 percent.

Tonight: Cloudy with showers. Locally heavy rainfall possible. Lows 62 to 69 near the shore to 52 to 57 at 4000 feet. Northeast winds up to 10 mph increasing to 10 to 15 mph after midnight. Chance of rain 90 percent.

Tuesday: Mostly cloudy. Showers in the morning, then showers likely in the afternoon. Locally heavy rainfall possible in the morning. Highs 75 to 80 near the shore to around 64 at 4000 feet. Northeast 10 to 15 mph. Chance of rain 80 percent.

Waikoloa

Today: Partly sunny. Breezy. Isolated showers and thunderstorms in the morning, then scattered showers and slight chance of thunderstorms in the afternoon. Highs 78 to 86 near the shore to 63 to 68 above 4000 feet. Northeast winds up to 25 mph. Chance of rain 50 percent.

Tonight: Mostly cloudy with isolated showers. Lows 67 to 73 near the shore to 48 to 54 above 4000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Tuesday: Partly sunny with isolated showers. Highs 78 to 86 near the shore to 63 to 69 above 4000 feet. Northeast winds up to 15 mph. Chance of rain 20 percent.

Synopsis

Strong trade winds will decrease slightly by Tuesday but remain breezy through the rest of the week. The upper trough will linger nearby through the end of the work week, keeping our arms unstable and maintaining the potential for locally heavy downpours. Isolated thunderstorms are possible across the eastern end of the state through today. Drier trade wind weather is expected to return this coming weekend.

Discussion

A high persists northeast of the main Hawaiian Islands, with a weakening front located several hundred miles northwest of Kauai. The gradient pressure between the high and equatorial low pressure is a breezy trade across the local waters this morning. The upper trough resides over the central and eastern islands. Satellite loop shows overcast low clouds piled up along windward areas of the islands, with mauka and leeward areas also cloud covered within the strong trades. Radar shows scattered to numerous showers moving into windward areas, with the highest coverage over Oahu and Maui. Spots of deeper convection, possibly thunderstorms, persist across the Alenuihaha Channel and across the northeast waters of Oahu and the islands of Maui County.
Models show the highs and lows in the north and northeast of the islands during the forecast period, keeping moderate to breezy trade winds in place. The upper trough will close off into the uppermost vicinity of the central and eastern end of the state today, then linger over or near the islands through much of the work week. Persistent trades and instability will be possible for much of the week, while elevated inversion heights will allow showers to reach leeward communities more regularly as well.
Isolated thunderstorms are possible across Maui County and the Big Island through this morning, and on the Big Island this afternoon. Depending on the timing and location of the upper low, the possibility for isolated thunderstorms may need to be extended. Wintry weather has canceled across the Big Island summits and the Winter Weather Advisory there has been canceled.

Aviation

Breezy moist trade northeast continue to maintain a large number of clouds and showers along windward slopes, coasts, and within channels through the TAF period. The threat of thunderstorms across the central and eastern islands into this afternoon. Showers will also allow for large numbers of sea breezes and showers across the sea to see the Big Island and Maui this afternoon.
AIRMET Sierra for mountain obscuration.
AIRMET Tango for low-level turbulence immediately south through higher terrain remains in effect for all islands. In addition, light icing is possible in the shallow layer between FL180 / 280 through tonight, mainly for Maui through the Big Island, as mid and upper level moisture combines with the upper level low over the islands.

Marine

High pressure north of the state is producing strong trade northeast of the area. The Small Craft Advisory (SCA) has been extended for all Hawaiian Coastal Waters through tonight. Trade winds are expected to remain elevated over the next several days. This is with the SCA conditions going across many areas throughout the middle of the week. Also, the upper arm over the area has destabilized the local airmass. This morning is likely to continue throughout the area. This upper level is expected to linger over the state at least Thursday.
A new long period northwest swell has arrived at buoy 51001 and will begin to open north and west waters today. The swell will then get reinforced late Tuesday into Wednesday with surf heights possibly reaching low end advisory levels. This swell will then lower gradually through the rest of the week.
A new long period south swell continues to fill in this morning and will continue to build today. The even larger south swell is expected to arrive Tuesday into Wednesday. This swell may be large enough to reach low levels of advisory levels during its peak Wednesday and Thursday. This swell will then lower gradually through the rest of the week.
Trade winds over and upwind of the state will continue to produce short period choppy surf along east facing shores through all of next week. Surf heights |

HFO Watches / Warnings / Advisories

Small Craft Advisory until 6 PM HST this evening for all Hawaiian waters,

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Courtesy Data of NOAA.gov

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