Kona wind conditions brought the haze from Kilauea volcano north from the Big Island, which is a normal weather pattern for this time of year, state health officials said.

"This is more Mother Nature than man-made," said Lisa Young, an environmental health specialist with the health department's Clean Air Branch.

The health department has 15 air-quality monitoring stations statewide, including eight on O'ahu, but they were unnecessary today.

Young said the vog this morning was "quite heavy."

"And because there is hardly any wind, it is hanging around," she said.

Health officials issued a no-burn notice to O'ahu, Maui and Big Island farmers who have permits to burn agricultural waste, Young said.

The vog will be around as long as the state's tradewinds are absent.

The tradewinds have been light-to-nonexistent since Oct. 23, giving rise to sticky, humid conditions, according to the National Weather Service.

Forecasters predict the tradewinds will return for a single, light day — Thursday — before disappearing again until sometime next week.

Southeasterly winds typically bring in vog from the Big Island, but the weather service doesn't monitor it.

"It looks like since yesterday the winds have been southeast and that is a typical direction to bring it up to us," said Jonathan Hoag, a meteorologist with the weather service. "And a pilot today said he could see it over Lanikai at a low level. I don't know whether it is truly vog or what."