A storm that will bring major disruptions of travel and daily activities to much of the nation will hit Harrisburg, Pa., with some snow Monday morning.
The greatest accumulation from the storm will occur south of the Mason-Dixon Line, where over 6 inches of snow is forecast. However, amounts will be lower across much of the Lower Susquehanna Valley, with 1 to as much as 3 inches.
Lengthy flight delays and many cancellations are expected Monday, since it will move into the mid-Atlantic today and impact major hubs.
Snowfall rates can reach or surpass 2 inches per hour in some locations south of the Maryland border. Such intense snowfall can overwhelm shoveling and plowing operations, as well as strand motorists.
Motorists heading along the Turnpike Monday morning and especially those heading southward along I-81 into Northern Virginia and I-83 into Maryland should prepare for difficult travel.
More cold weather will follow the storm Monday night and Tuesday.
The changing of the seasons will bring beneficial rainfall to northern Brazil, a region that has experienced severe drought over the past several years.
Rain and thunderstorms will continue to cause travel delays and raise the risk of isolated flooding in parts of the northeastern United States and Atlantic Canada into the weekend.
Typhoon Haima made a second landfall in southeastern China on Friday after leaving at least 13 dead in the northern Philippines.
Damaging storms pounded the Pacific Northwest, while two powerful typhoons struck the Philippines within a four-day span.
A dramatic change to colder weather, and in some cases a taste of winter with snow, will take place this weekend.
Powerful solar storms can devastate the world's interconnected power grids, airline operations, satellites and communications networks.
Tuscaloosa, AL (1884)
No rain from August 28-October 22. Severe drought throughout Southeast.
Temperature reached 104 degrees at San Diego (record for date). Record for date 100 degrees at Los Angeles (downtown). Climax of heat wave of record duration in Southern California.
Ottawa, Canada (1988)
Record October snowstorm brings 21 cm (just over 8 inches).