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For the immediate Hawai`i area, products issued are Terminal Aerodrome Forecasts (TAFs), area forecasts, upper level wind and temperature forecasts, and AIRMETs (AIR pilots METeorological information) for low clouds, turbulence, and icing. In addition, the Honolulu forecast office is an aviation Meteorological Watch Office that covers approximately 8,650,800 square miles. See Aviation Area Map.

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Aviation section from the Area Forecast Discussion
issued at: May 23, 2018 3:56 AM HST

High pressure north of the state will maintain locally breezy trade winds over the next few days. The early morning soundings from PHTO and PHLI show a strong low level inversion between 6-8 kft. The combination of the breezy trade winds and stable atmosphere will create conditions for more wide spread low level turbulence and and AIRMET TANGO is posted over and immediately south through west of the mountains.

Low level moisture embedded in the trades will focus clouds and isolated to scattered showers along the windward and mountain slopes. Some passing showers may introduce periods of MVFR CIGS/VIS. Otherwise, expect predominately VFR conditions.

Periodic explosive eruptions at Kilauea/Halemaumau crater continue to produce periods of volcanic ash, with the plume of emissions predominately rising to the inversion level and extending to the southwest over Kau district on the Big Island. MVFR VIS can be expected in this area. Volcanic ash SIGMET TANGO series remains in place at this time.

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