HONOLULU (HawaiiNewsNow) - The unofficial end of summer has some un-summerlike weather associated with it.
Hawaii's weather for Labor Day will be dictated by Tropical Storm Jimena to the northeast of the state and an upper-level low pressure system to the northwest. Jimena is blocking the trade wind flow while the low and an associated trough to the southwest are drawing up more moisture, making for muggy conditions.
The light winds, along with daytime heating, will allow clouds to form by afternoon, accompanied by showers. Some of the showers could be heavy at times.
Everything is arranged just right for vog to spread from the volcanoes on the Big Island to the rest of the island chain. According to the latest vog model forecast, the haze could remain over much of the state through Tuesday.
A slightly drier airmass could move in Tuesday as well, but more unstable weather could move back in right behind it as Jimena tracks to the north of the islands later in the week.
Dangerous swells from Jimena will also keep a High Surf Warning posted for east-facing shores through Labor Day. A High Surf Advisory also is is in effect for south shores. On Oahu, it's also time for the monthly box jellyfish influx, mainly at south shore beaches.