Grand Illumination Night, scheduled for Wednesday evening, has been postponed due to the threat of thunderstorms, the Martha’s Vineyard Camp Meeting Association board of directors has announced. The annual lighting of the lanterns at the Campground will instead take place Thursday evening.

The event will follow the same format, beginning with a performance by the Vineyard Haven Band at 7:30 p.m., a Community Sing at 8 p.m., and the lighting of the lanterns at 9 p.m.

Camp Meeting Association administrator Bo Fehl said the decision to postpone the event was not made lightly, but deemed necessary after the board of directors scrutinized several weather reports.

“It looks miserable,” Mr. Fehl said.

According to the National Weather Service, which issued a hazardous weather warning for much of Massachusetts and Rhode Island, isolated thunderstorms this afternoon and tonight could bring strong winds, hail and localized flooding.