Isaias fades into the East Coast, threatening millions with flooding, widespread rain and severe storms

As the remnants of Hurricane Isaias move farther inland, millions of people across the Northeast and Mid-Atlantic brace for a soggy end to the weekend, with heavy rain, flooding and even severe thunderstorms possible.

According to the FOX Forecast Center, the remnants of Isaias will interact with a dip in the jet stream, helping push the storm system east while increasing the chances for widespread rain across the region.

TROPICAL STORM RACHEL FUELS MAJOR WEST COAST FLOOD THREAT WITH MONTHS OF RAIN POSSIBLE IN HOURS

Major cities along the Interstate 95 corridor, including Washington, D.C., Baltimore, Philadelphia and New York City, will see a complete washout today, with rain to fall throughout much of the day. Similar conditions are expected farther inland in Pittsburgh, Cleveland and Charleston, West Virginia.

WHAT'S THE DIFFERENCE BETWEEN A HURRICANE MAKING A DIRECT HIT AND LANDFALL?

While widespread flooding is not expected, the tropical moisture left behind by Isaias could lead to pockets of flooding, particularly across the Mid-Atlantic.

The FOX Forecast Center said a Level 1 out of 4 flash flood risk stretches from New York City to Washington, D.C., south toward North Carolina's Outer Banks and west into West Virginia.

EYE OF THE SEASON: THE MOST NOTABLE ATLANTIC HURRICANES DURING EL NIÑO YEARS

Most areas are expected to receive 1 to 2 inches of rain, although higher totals are possible along the I-95 corridor, especially from Washington through Philadelphia and into New York City.

Farther south, the threat of severe weather will continue across portions of the Mid-Atlantic and Carolinas, where warmer temperatures and abundant moisture could fuel stronger thunderstorms.

A Level 2 out of 5 severe weather threat is in place from the Washington, D.C., area south toward Wilmington, North Carolina. According to the FOX Forecast Center, the primary concerns will be isolated tornadoes that develop quickly and damaging wind gusts reaching 60 mph.

7 FACTS YOU SHOULD KNOW ABOUT FLASH FLOODS

HOW TO WATCH FOX WEATHER

By Monday morning, the remnants of Isaias are expected to race out of New England and into the North Atlantic. Some lingering showers and clouds could stick around through the morning before conditions begin improving around midday.