With the Thanksgiving holiday in full swing, many have reached their destinations – but for everyone else, a storm moving from the Rockies into the Midwest and Northeast will bring rain and snow through tomorrow, likely impacting flights and busy roads.

Nearly 3 million people are expected to be screened by TSA today, and a record 71.7 million people are expected to travel by car this Thanksgiving – more than 1 million more than last year.

The storm, already dropping snow across the Rockies on Wednesday morning, is expected to barrel eastward into the Midwest and Northeast through Thanksgiving all day today.

Rain will become heavier in the evening from St. Louis to Indianapolis and Pittsburgh.

Airports in Denver, Kansas City and St. Louis are expected to feel the impact of that weather today, NBC News’ Al Roker said on the TODAY show on Wednesday, with delays possible in Nashville, Dallas, Houston and Austin.

According to FlightAware, air traffic was relatively smooth as of Wednesday morning with nearly 500 flights delayed and 20 canceled.

A ground delay at Newark Liberty International Airport in New Jersey due to a shortage of air traffic controllers was lifted at 1 a.m. Wednesday.

For road travelers, I-80, I-64, I-75 will be hit with rain on Wednesday, and I-25 and I-70 with snow in the Rockies.

Thanksgiving Day will bring heavy rain on the I-95 corridor from Florida to Maine, and snow accumulations in inland Northeast and Northern New England.

Points north of New York State’s Hudson Valley and inland New England can expect 1 to 3 inches of wet snow, with local totals exceeding 6 inches at the highest mountain peaks.

The iconic Macy’s Thanksgiving Day Parade will go on rain or shine as the Big Apple is forecast to experience drenching rain with temperatures in the 40s. Winds are forecast to be less than 10 miles per hour, allowing balloons to fly. The parade’s beloved balloons cannot fly when maximum sustained winds reach 37 km/h or more or when gusts exceed 55 km/h.

Cities on the East Coast, including Baltimore, Washington DC, New York, Hartford and Boston, can expect cold rain, with precipitation totals between 0.50 and 1 inch. Road traffic will flow smoothly into Virginia and Maryland, including along the I-95 corridor into Maine.

By the overnight hours through Friday morning, travel conditions will be largely normal as the system moves out of the New England area.

However, a lake effect snow event is starting around the Great Lakes and will last through Sunday.

Airport hubs to watch on Thursday include Atlanta, Charlotte, Washington DC, Philadelphia, NYC, Boston, Pittsburgh and Buffalo.

On Sunday – typically the busiest travel day of the Thanksgiving week as people return home from holiday travel – the cold will continue in parts of the country, as will lake-effect snow around the Great Lakes and in the Northeast.

A total of 3 million people are predicted to pass through the TSA on Sunday, almost reaching the record of 3.01 million set on the Sunday after this year’s Fourth of July holiday.

Chicago and Detroit may experience problems at their airports on Sunday, but the east and west coasts look good for road and air traffic.

All the while, much of the Northern Plains and upper Midwest will experience bitter cold to end the week, with temperatures expected to be 10 to 20 degrees below average starting on Thanksgiving Day.

From Thursday through Sunday, Chicago will see highs in the 30s and 20s and lows in the teens, New York will see highs in the 40s and lows dropping to around 80 degrees Fahrenheit, and DC will see highs in the 50s and forties and lows in the thirties. and high twenties. Minneapolis will see lows in the single digits this weekend.

As travelers take to the skies to join loved ones, authorities are warning people who leave their cars in airport parking lots to be careful due to vehicle thefts.

More than 300 cars were stolen this year at the nation’s busiest airport, Hartsfield-Jackson Atlanta International Airport — nearly three times as many as last year, Atlanta police said.

“Suspects can program key fobs on vehicles and that’s what got us to where we are today,” said Maj. Kelley Collier, commander of the Atlanta Airport District. This year, police are adding cameras, motorcycle patrols and new fencing to curb crime in the 30,000 parking spaces.

More than 50 vehicles were also stolen from Dallas Fort Worth International Airport this year, as police said a car theft ring that targeted airports in multiple states was responsible. DFW Airport police arrested the alleged ringleader last month.

A woman named Katy told NBC News that she and her husband had gone on a business trip and returned to Columbus International Airport to find their car missing.

“In total disbelief that we had parked next to an airport and came out and our car was gone. We just assumed it was safer in that kind of environment,” she said. Police later found it abandoned and completely stripped.

“I hope the airports will improve their security so that we can travel and come back and have your car there,” she added.