Welcome to spring.

A fourth nor'easter is hitting the East Coast this month.
Credit: JOSEPH PREZIOSO/AFP/Getty Images

The Northeast is forecasted to experience its fourth winter storm in three weeks through Thursday. More than 200 flights — the majority from Philadelphia and Washington, D.C. — have already been cancelled in anticipation of the storm, and many more cancellations and delays are likely.

American Airlines cancelled 131 flights on Tuesday and JetBlue cancelled 80. Regional airline Republic Airlines has cancelled more than 200 flights (a majority to or from Philadelphia) for Tuesday and Wednesday.

Winter storm (which some are calling Toby) is projected to drop snow or a mix of snow and rain in the mid-Atlantic and central Appalachians, including Philadelphia, Baltimore, and suburbs of Washington, D.C. on Tuesday. The storm will move up the coast on Wednesday, bringing strong winds and snow up the coast to southern New England. The storm will work its way out of the country by Thursday, lingering with some snow in Maine.

Those in the storm’s path can expect more of the same winter weather that’s been battering the area for weeks: snow, heavy rain and strong gusts of wind.

Strong winds were already present in the south on Monday when baseball-sized hail and powerful winds whipped through Georgia, Alabama and Tennessee.

Passengers traveling through the Northeast this week — including flights to and from Boston, New York, Philadelphia and D.C. — should contact their airlines for specific flight information.

Delta, American Airlines, JetBlue, Southwest and United have all issued fee waivers, so customers may change travel booked for Tuesday or Wednesday. Alaska Airlines passengers may rebook travel through Thursday.

Those with a flight to, from, or through the northeast on Wednesday would be smart to rebook now rather than later, if their travel is flexible.