Episodes of rain, thunderstorms and mist will threaten to cause delays and postponements of racing activities at Long Pond, Pennsylvania, this weekend.
According to AccuWeather Senior Meteorologist Dave Dombek, "A very unsettled weather pattern is setting up shop along the Atlantic Seaboard into Sunday."
The green flag is set to drop for Sunday's Sprint Cup race at 1:18 p.m. EDT at Pocono Raceway, sometimes called the Tricky Triangle.
In addition to bringing along some raingear and mud-resistant shoes, folks who mind the cool weather may want to bring along long sleeves and jackets.
Temperatures are forecast to peak in the 70s on Sunday with a few showers and thunderstorms around, mainly during the afternoon.
There is the potential that locally heavy rainfall can cause seepage issues on the track and muddy conditions in the meadow parking lots that surround the raceway.
In recent years, Pocono Raceway has improved drainage on the track and NASCAR has upgraded drying equipment to help reduce the wait time in between showers and following heavy rains.
However, the drying equipment may not be enough to dry the track if showers and thunderstorms linger over Long Pond for several hours.
If this happens and the race has not yet reached the half-way point, NASCAR officials may end up postponing the race until Monday.
Monday does appear to be drier than Sunday, but a shower or thunderstorm may still develop during the day.
The Pocono Mountains are actually a plateau with elevations averaging between 1,600 and 2,000 feet above sea level. When moisture moves in from the Atlantic Ocean and flows uphill into the region not only can the weather be surprisingly cool, but fog can also shroud the area.
Several fast-moving storm systems will bring windy and wet weather to the British Isles and northern Europe.
Dangerously poor air quality will remain across northern India and Pakistan into the coming week.
While prospects for a white Christmas are grim along the I-95 corridor, many communities from the Great Lakes to the Rockies should enjoy the desired snowy scene for the holiday.
AccuWeather RealFeel® temperatures will be in the 20s through midweek, but a cold front will drop those temperatures into the single digits by the end of the week.
Wet weather will be the theme for Seattle through at least the first part of the week.
Soggy weather will be the rule in the run-up to Christmas in the Atlanta area.
Perey, IL (1967)
An F2 tornado carried women and her baby 400 feet; they survived.
Wind gusts to 91 mph across the San Joaquin Valley - hundreds of cars and trucks buried by blowing dust.
Des Moines, IA (1990)
Freezing drizzle with a temperature of -2 degrees F.