Millions of Americans face a soggy Halloween weekend as Tropical Storm Vance’s moisture fuels heavy rain and flash-flood risk across more than 20 states, with Texas hit hardest first.
FOX Weather reports that deep tropical moisture from Tropical Storm Vance is set to combine with a developing frontal system and drive heavy rain and thunderstorms into a wide stretch of the country heading into Halloween weekend.
Texas carries the greatest flash-flooding threat beginning Thursday. The FOX Forecast Center points to repeated rounds of showers and thunderstorms that could produce widespread rainfall there, and a Level 2 out of 4 flash-flood threat has been issued because flooding is very likely in some areas.
Some locations may see 2 to 3 inches of rain. Higher amounts of 4 to 5 inches are possible.
Tropical Storm Vance was located about 315 miles off the southwestern coast of Mexico, moving at 7 mph with maximum sustained winds of 70 mph. The storm itself is not expected to make a U.S. landfall. Its moisture is the problem.
That tropical moisture is forecast to interact with a large storm system and an upper-level trough moving across the United States. The setup is classic for soaking rains over a broad area rather than a single coastal hit.
By Friday and Saturday, the rain threat expands across the Plains, the Mississippi and Ohio valleys, the Great Lakes, and the Southeast. By Sunday, the system is expected to push farther east. Rain and gusty winds could reach parts of the Mid-Atlantic and the Northeast, leaving a wet and unsettled end to the weekend.
More than 20 states are in the path of heavy rain or flash-flooding impacts from the Vance moisture plume. Millions of Americans are expected to deal with unsettled weather that could disrupt Halloween celebrations and outdoor plans.
Families counting on dry sidewalks for trick-or-treating, outdoor parties, or weekend travel through the central and eastern United States may need backup plans. Flash flooding is the sharper risk in the hardest-hit zones, especially early in Texas, where the repeated rounds of storms raise the odds of rapid runoff.
Forecast details will keep shifting as the frontal system and upper-level trough organize. What is already clear from the FOX Forecast Center outlook is the scale: a multi-day, multi-region rain event timed squarely over Halloween weekend, fed by tropical moisture still spinning hundreds of miles offshore.
When a storm off Mexico can soak half the country on cue for Halloween night, the smart move is simple, watch the forecast, mind the low water crossings, and keep the candy runs on high ground.
