AccuWeather Daily

Tropical moisture could fuel heavy Halloween weekend rain and renewed flash flooding across the Southwest. Southern California’s flood risk hinges on how quickly storms and a Pineapple Express come together.

Also, a wet Halloween may dampen some spooky spirits across the United States this year, while a chill may force others to bundle up for trick-or-treating.

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AccuWeather's Monica Danielle says families New Mexico, Utah, and Colorado are still waiting to return home after raging rivers swallowed roads, stranded residents and flooded entire neighborhoods across the Southwest.

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AccuWeather's Ryan Adamson says that while Josephine has come and gone, AccuWeather meteorologists are cautioning residents of the Southeast and Bahamas to not let their guard down.

Also, AccuWeather's Alex Sosnowski says that tropical Storm Olana has the potential to disrupt daily activities in Hawaii due to flooding downpours during the last week of October.

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A storm responsible for areas of rain and thunderstorms and severe weather through midweek over the Southwest will focus its efforts farther inland over the western United States into Friday.

Also, Vance is forecast to rapidly strengthen into a major hurricane, with a dangerous landfall in Mexico possible as one scenario. A separate storm in the tropical Pacific could bring rain to Hawaii in late October.

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The Eastern Pacific basin has broken several hurricane season records already, while the Atlantic remains quiet.

Also, powerful waves have damaged 800 feet of pavement and washed away 1,800 feet of protective dunes along the Outer Banks, cutting off a key route to Hatteras Island.

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Skiers in Colorado hit the slopes in October on snow saved from last winter. Now the experiment could offer a new way to keep ski resorts running as winters grow warmer and less predictable.

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As El Niño intensifies, changes in global wind patterns are slightly slowing Earth’s rotation, adding about 1 millisecond to the length of a day at the peak of a strong event.

Also, the Orionid meteor shower peaks Wednesday night as Earth passes through debris left behind by Halley’s Comet, with the best viewing conditions expected before daybreak.

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Less than a month after a powerful nor'easter blasted the mid-Atlantic coast, a new storm will evolve into a nor'easter this week and lead to yet another round of strong winds, beach erosion and coastal flooding.

Also, tropical moisture will fuel downpours across California and the Southwest this week, raising the risk of flash flooding and mudslides.

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A record-setting El Niño is expected to steer the 2026-2027 winter pattern, shifting storm tracks, snowfall and temperatures across the country while bringing a stormier setup to parts of the West.

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Santa Ana winds will bring 90-degree heat and gusts reaching 80 mph to parts of Southern California into this weekend, raising wildfire risks and the potential for power shutoffs just days after Rachel's rain.

Also, a Utah ultramarathon was canceled midrace after heavy rain left 70 runners and volunteers stranded.

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