Tropical Storm Lane update: Aug. 24, 2018 at 11 p.m. HST

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EDITOR’S NOTE: This is an archive post of KHON2’s ongoing Lane coverage. Click here to view the most recent update.

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Tropical Storm Lane continues to weaken, continuing a slow crawl to the northwest at 3 mph.

Meteorologist Eric Lau says that sluggish speed poses a threat to the islands 

At 1100 PM HST (0900 UTC), the center of Tropical Storm Lane was located near latitude 19.4 North, longitude 158.5 West.

Lane is moving toward the north-northwest near 3 mph (6 km/h), and this general motion is expected to continue through Saturday morning. This will likely be followed by a turn toward the west with an increase in forward speed starting Saturday afternoon. This westward motion is forecast to continue through Sunday. On the forecast track, the center of Lane will pass south of Kauai and Niihau on Saturday.

Maximum sustained winds are near 65 mph (100 km/h) with higher gusts. Additional weakening is forecast through this weekend, and Lane may become a remnant low by Sunday.

SUMMARY INFORMATION

LOCATION:

  • 19.4N 158.5W
  • ABOUT 135 MI…220 KM SSW OF HONOLULU HAWAII
  • ABOUT 190 MI…305 KM SSE OF LIHUE HAWAII

MAXIMUM SUSTAINED WINDS…65 MPH…100 KM/H

PRESENT MOVEMENT…NNW OR 335 DEGREES AT 3 MPH…6 KM/H

MINIMUM CENTRAL PRESSURE…992 MB…29.30 INCHES

WATCHES AND WARNINGS

The Hurricane Warning for Oahu, Maui, Molokai, Lanai, and Kahoolawe has been changed to a Tropical Storm Warning.

Therefore, a Tropical Storm Warning is in effect for Oahu, Maui County, including the islands of Maui, Lanai, Molokai, and Kahoolawe, and Hawaii County. 

A Tropical Storm Watch is in effect for Kauai County, including the islands of Kauai and Niihau.

A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area.

A Hurricane Watch means that hurricane conditions are possible within the watch area.

A Tropical Storm Watch means that tropical storm conditions are possible within the watch area.

Interests in the Northwestern Hawaiian Islands should monitor the progress of Hurricane Lane.

For storm information specific to your area, please monitor products issued by the National Weather Service office in Honolulu Hawaii.

HAZARDS AFFECTING LAND

WIND: Tropical storm conditions are still expected in and near outer rain bands that will affect Oahu, Maui County, and the Big Island tonight into Saturday. Tropical storm conditions are possible on Kauai starting Saturday.

RAINFALL: Lane’s outer rain bands will produce excessive rainfall this weekend, which could lead to additional flash flooding and landslides. Lane is expected to produce total rain accumulations of 10 to 20 inches in some areas. Localized storm total amounts in excess of 40 inches have already been observed along the windward side of the Big Island.

SURF: Large swells generated by Lane will impact the Hawaiian Islands tonight. These swells will produce high surf along exposed south and east shorelines through early Saturday.

TORNADO: Isolated tornados are possible from tonight into early Saturday across parts of the Big Island, Maui County and Oahu.


Related Story: Ready for Disaster


It took awhile…but once the 35 to 40 kt of shear began to impact the core convection from Lane, the battle ended quickly. A very helpful 89 GHz microwave pass over Lane around 0000 UTC showed the circulation center was now mainly comprised of low and mid level clouds completely detached from the remaining pockets of deep convection to the northeast of the center. Even a blend of the Dvorak final-T and current intensity estimates appeared to be too generous, based on the very rapid degradation of the cloud pattern and the WSR-88D radar velocities. Settled on 60 kt for the current intensity. 

The new motion estimate is 315/3, but this is a bit uncertain until we have more time to examine this change. The low level circulation of Lane is expected to continue to weaken in the face of continued strong shear, and driven on a westward track by the low level flow. The track guidance is in better agreement than I’ve seen it in awhile. If it survives long enough, the global models show Lane may get a new lease on life as an extratropical low over the Northwest Hawaiian Islands. In any case, we will be happy to get rid of the tropical cyclone in our vicinity. Until then, people should be mindful of additional impacts that can still occur until Lane departs.

KEY MESSAGES:

1.  Rainbands around the northern and eastern periphery of Lane can still bring persistent, flooding rainfall and damaging winds. Effects from tropical storms can and do extend well from the center. Winds will be accelerated over higher terrain, through gaps, and where winds blow downslope. Winds will also be stronger at the upper floors of high rise buildings.

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