Huge ‘hybrid storm’ will form over the US

A soggy, potentially dangerous week is ahead for a "huge" section of the central United States, forecasters warned, as the remnants of Hurricane Polo interact with a separate, sprawling weather system to bring days of rain and possible flooding.

"As these features combine into a new, hybrid storm, the influx of moisture spreading across the central United States will pose the risk for flash flooding," AccuWeather meteorologist Alyssa Glenny said.

The National Weather Service explained that tropical moisture from the remnants of Hurricane Odalys and Hurricane Polo will surge over the Southwest into the central U.S. this week with several days of heavy to excessive rainfall, which may bring limited to "considerable" flooding. The threat area is "huge," the weather service said in an online forecast.

Flood watches have been issued through Sept. 30 across the Southwest U.S.

In addition to the moisture from Polo, the other system, known as an upper-level low, or trough, will be moving into the central U.S. from the West, Marc Chenard, a meteorologist with NOAA's Weather Prediction Center, told USA TODAY.

That low will help funnel plentiful moisture northward from the Gulf, he said. "This will produce a widespread area of heavy rainfall."

"Even…

Original source: https://www.usatoday.com/travel/