While much of the nation will be rain-free on Halloween, that won't be the case in much of the Northwest or parts of New England.

Roughly 20,000 people in North Texas were still without power Saturday morning after severe storms swept the region overnight.

The Boston 25 Weather is tracking the potential for a “big impact” storm in Massachusetts ahead of Halloween. “I’m putting this on your radar now. Our next big impact storm is on the way Thursday into Friday,” Boston 25 Meteorologist Vicki Graf said in her latest forecast. “The worst of this, as of right now, appears to be late Thursday.”

A flood watch is in effect for much of the surrounding counties as heavy storms will begin to move into the Houston area. See live radar, the latest weather alerts and the timeline for storms.

Tropical Storm Melissa was nearly stationary in the central Caribbean on Friday, with forecasters warning that it could strengthen and swipe Jamaica as a powerful hurricane and dump a staggering amount of rain -- up to 35 inches -- on southwest Haiti,