Moderate trade winds returned yesterday, slowly pushing out a layer of vog that had blanketed much of the state since Sunday.

The trade winds — in the 10- to 15-mph range — are expected to stick around through Thursday, then drop off again slightly through the weekend, which could mean more haze in the short-term forecast, meteorologists said.

The vog started rolling in Sunday morning after winds were blocked by a low-pressure system in the North Pacific.

By 3 p.m. Sunday, visibility at Honolulu Airport was less than four miles, the National Weather Service said. At the same time yesterday, visibility was at 10 miles or more.

NWS meteorologist John Bravender said most areas of O'ahu should be vog-free by this morning.

"Conditions are starting to improve," he said yesterday afternoon.

The return of trade winds means a return to trade wind weather — with afternoon and evening showers expected for Windward O'ahu through the week.

And though the light trades mean days will be warm — in the high 80s — the nights are cooling off to the high 60s or low 70s.