Several states in the Northeast are under warnings for potential severe weather, while a wintry mix over a large swath of the West. Forecasters also warn of thunderstorms in the southern Plains and South.
Strong thunderstorms could bring severe weather to parts of the Northeast. Storm warnings have been issued for portions of West Virginia, Virginia, Maryland, Delaware, Pennsylvania, and New Jersey of a Level 2 risk of severe weather, which could include damaging wind gusts, large hail, localized flooding, and an isolated tornado cannot be ruled out.
A Level 1 threat has been issued for portions of West Virginia, Virginia, Maryland, Pennsylvania, southern New York, Long Island, and Massachusetts.
Several states in the West were already seeing snowfall on Tuesday, as photos circulated showing snow-covered bison taking a stroll through Yellowstone National Park.
The National Weather Service (NWS) issued freeze and frost warnings for parts of northern California, Oregon, and Idaho for Tuesday morning.
The NWS forecast mixed precipitation over portions of Washington, Oregon, Idaho, Montana, Wyoming, Nevada, Utah, and Colorado for Tuesday.
Portions of the Plains were expected to experience temperatures 20 to 30 degrees above average in some locations, Fox reported. A cold front is expected to move into the region midweek bringing temperatures down while increasing the chance of showers and thunderstorms.
On Tuesday, thunderstorms are forecast over portions of south-central Kansas, most of Oklahoma and Texas, central and southern Arkansas, Louisiana, much of Mississippi, southern Alabama, and the Florida Panhandle.
Heavy rain could be problematic in some areas. A flash flood warning has been issued for west-central Louisiana.
A system a few hundred miles east of Bermuda, the remnants of Peter, is expected to revive into a short-lived depression on Tuesday night, according to the National Hurricane Center (NHC), the Miami Herald reported. Two other disturbances in the Eastern Atlantic are forecast to strengthen into tropical depressions within the next two days as they move west-northwest.
The closer system has a 70% chance of formation in the next 48 hours, while the other system has an 80% chance of formation within the next five days. A tropical wave behind these has an 80% chance in the next two days and a 90% chance in the next five.
Hurricane Sam is now a powerful Category 4 hurricane with sustained winds of 130 mph, traveling northwest at 9 mph roughly 610 miles east of the northern Leeward Islands. By Thursday, the storm is expected to strengthen into a Category 3 and maintain that strength as it moves southeast of Bermuda by Saturday, CBS Miami reported.