Hawaii County climate forecast is August 19, 2021

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Photo credit: James Grenz

Hilo

Today: Partly sunny with a few showers. Highs from 81 to 87 near shore to about 72 at 4000 feet. Wind from the northeast up to 24 km / h, which increases to 10 to 24 km / h in the afternoon. 50 percent chance of rain.

Tonight: Mostly cloudy. Numerous showers in the evening, then showers after midnight. Lows of 67 to 74 near shore to about 56 to 4000 feet. Northeast winds at a speed of 10 to 24 km / h turn north after midnight. Chance of rain 90 percent.

Friday: Mostly cloudy. Numerous showers in the morning, then isolated showers in the afternoon. Highs from 83 to 89 near the shore to about 74 at 4000 feet. Northeasterly winds of 10 to 15 miles per hour. Chance of rain 70 percent.

Kona

Today: Mostly sunny. A few showers in the afternoon. Highs from 82 to 87 near shore to about 72 near 5000 feet. In the afternoon a light wind from the west blows up to 10 mph. Chance of rain 50 percent.

Tonight: Partly cloudy. Isolated showers in the evening, then isolated showers after midnight. Lows of 69 to 74 near shore to about 55 near 5000 feet. Breeze. 50 percent chance of rain.

THE ARTICLE CONTINUES BELOW THE ADVERT

Friday: Mostly sunny. A few showers in the afternoon. Highs from 82 to 87 near shore to about 72 near 5000 feet. Breeze. 50 percent chance of rain.

Waimea

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: airy. Partly sunny with a few showers. Highs 70 to 83. East winds 10 to 25 miles per hour. 50 percent chance of rain.

Tonight: airy. Mostly cloudy with a few showers. Lows of 69 near shore to 57 to 63 near 3000 feet. East winds 10 to 20 miles per hour. 50 percent chance of rain.

Friday: Partly sunny with a few showers. Highs 72 to 85. East winds 10 to 15 mph. Chance of rain 50 percent.

Kohala

THE ARTICLE CONTINUES BELOW THE ADVERT

Today: airy. Partly sunny with a few showers. Highs 70 to 83. East winds 10 to 25 miles per hour. 50 percent chance of rain.

Tonight: airy. Mostly cloudy with a few showers. Lows of 69 near shore to 57 to 63 near 3000 feet. East winds 10 to 20 miles per hour. 50 percent chance of rain.

Friday: Partly sunny with a few showers. Highs 72 to 85. East winds 10 to 15 mph. Chance of rain 50 percent.

Southern big island

Today: sunny and airy. A few showers in the afternoon. Highs from 85 near shore to 75 near 5000 feet. East winds 10 to 25 miles per hour. Chance of rain 20 percent.

Tonight: Mostly clear. Isolated showers in the evening. Lows of about 70 near shore to about 54 near 5000 feet. Northeasterly winds of 10 to 15 miles per hour. Chance of rain 20 percent.

Friday: sunny. A few showers in the afternoon. Altitudes around 87 near shore to 77 near 5000 feet. East winds 10 to 15 miles per hour. Chance of rain 20 percent.

feedback

Today: Partly sunny with a few showers. Highs from 81 to 87 near shore to about 72 at 4000 feet. Wind from the northeast up to 24 km / h, which increases to 10 to 24 km / h in the afternoon. 50 percent chance of rain.

Tonight: Mostly cloudy. Numerous showers in the evening, then showers after midnight. Lows of 67 to 74 near shore to about 56 to 4000 feet. Northeast winds at a speed of 10 to 24 km / h turn north after midnight. Chance of rain 90 percent.

Friday: Mostly cloudy. Numerous showers in the morning, then isolated showers in the afternoon. Highs from 83 to 89 near the shore to about 74 at 4000 feet. Northeasterly winds of 10 to 15 miles per hour. Chance of rain 70 percent.

Waikoloa

Today: sunny and airy. Heights from 83 to 88 near shore to 69 to 76 over 4000 feet. In the afternoon a southeasterly wind blows north at up to 24 km / h.

Tonight: Mostly clear. Lows of 73 near shore to 52 to 60 over 4000 feet. East wind up to 10 km / h.

Friday: sunny. Heights from 83 to 88 near shore to 69 to 76 over 4000 feet. North winds up to 10 km / h.

summary

Trade winds will intensify until Saturday in the moderate to locally breezy area with passing wind and mountain showers, while a high pressure ridge forms in the north of the region. The winds will subside from Sunday to Monday as the remnants of tropical cyclone Linda pass north of the island chain. Lighter, widespread winds will cause ocean breezes to form in some areas, with moderate northerly winds possible for islands closer to the remaining low center. Higher humidity and lighter winds will create warm and humid conditions across the state. The greatest threat from Linda’s remains will come from slow moving torrential rain bands, which can increase the potential for localized flash floods.

discussion

Satellite images from this morning show fairly stable cumulus and stratocumulus clouds drifting onto the islands from the east as the trade winds increase. An upper low in the far north of the state continues to move away from the region as high pressure builds up. To the east of the islands, Hurricane Linda is weakening further as it penetrates into the Central Pacific area of ​​responsibility later today. Stable stratocumulus clouds and drier air feed the system as it gains latitude, which will further weaken wind speeds around Linda as it approaches the Hawaiian Islands this weekend.
At 11:00 PM, HST Linda was approximately 1200 miles east of Hilo and drifting west-northwest at 17 MPH. The latest forecast from the National Hurricane Center in Miami shows the center of Linda, which passes north of the island chain, as a post-tropical residual low on Sunday and Monday.
In the short-term forecast, the trade winds with moderate to locally breezy winds have returned to Saturday in the forecast. Typical transient showers are expected, with the showers favoring the windward and mountainous areas of each island.
Sunday and Monday … A trade wind break will occur when former tropical cyclone Linda approaches the Hawaiian Islands from the east. Dry and stable air fed into this system from the north will continue to weaken the wind trends in the forecast. While Linda still keeps an eye on some uncertainties, our confidence in the effects of island weather on each island will improve over the next few days. Please keep up to date with the weather forecast conditions that may affect your location as the weather effects will evolve from island to island with this weakening system over time.
Wind Potential … The strongest winds with Linda stay on the north side of the low center, which keeps the weakest winds on the south side of this system closer to the islands. For these reasons, we expect lighter wind trends across the state as the weakened low passes just north of the state. Lighter wind trends will create some sea breeze activity for islands farther from the remaining low center, with the possibility of breezy north winds over islands closer to the system track. The chances of strong noxious winds from Linda’s remains remain slim at this point.
Heavy rain potential … Deeper tropical moisture hovering around this leftover low center will enter the state from the east on Sunday and Monday, with water levels in the range of 1 to 2 inches that can be broken. This unstable tropical humidity will create warm and humid conditions across the country. Slowly moving convergent shower bands can develop over the islands, increasing the risk of heavy rains and local flash floods during this time.
Tuesday and Wednesday … Linda’s remains pass west of the state as trade winds return to the region on Tuesday morning. Moderate to locally airy trade winds generate typical passers-by, which favor windward and mountainous areas.

aviation

The trade winds are returning this morning and are expected to get stormy later today and continue for the next few days. Relatively stable air will limit shower activity to windward and mountainous locations and over the Kona slopes of the Big Island. The best chance for low clouds or limited visibility in showers is night and morning hours each day, although VFR conditions are expected to prevail in most locations throughout the forecast period.
No AIRMETs are currently in effect, but mountain darkening could become an issue later this morning, especially for the eastern parts of Maui and the Big Island.

marine

Trade winds, some locally strong, will return to the area today as a weak surface trough emerges west of the islands. A Small Craft Advisory will be issued for the normally windy areas around Maui County and the Big Island as the winds pick up this morning. The winds are then expected to subside over the weekend as the remnants of tropical cyclone Linda pass north of the islands from Saturday night.
An above-average south swell has started a slow decline that will continue for the next few days. The High Surf Advisory for south facing coasts is canceled this morning as the surf has dropped below the recommended 10 foot threshold. No other significant swells from the south are expected until early next week, although small, moderate period swells will keep the surf from shallowing.
A small northwest pulse will continue to trend down until morning, although no significant northern swells are to be expected in the forecast period. The easterly swell from Hurricane Linda is starting to come and will continue to spread west through Thursday, maintaining moderate surf along the east-facing coast over the weekend. However, the wind waves will be small due to the expected light winds.

HFO watches / warnings / notices

Small Craft Advisory until Saturday 6:00 AM HST 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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