More Autumnlike chill is headed back to the Northeast, but there is good news for those who want summer warmth to hang on.
Following the passage of a cool front, a significant drop in temperatures will occur from Saturday to Sunday from the Great Lakes to northern New England.
The I-95 corridor from Baltimore to Philadelphia to New York City to Boston will notice cooler and less humid conditions by Monday.
Prior to the cooler air's arrival, showers and thunderstorms will continue to rumble along and ahead of the approaching front this weekend.
Showers and thunderstorms will remain most numerous with occasional downpours from Michigan to the eastern Great Lakes and northern New England through Saturday night.
The activity will become spottier as it reaches the rest of the Northeast late Saturday night into Sunday, limiting the disruptions to outdoor plans.
The core of the chill will settle across northern New England and northern and western New York, where Sunday's highs will be held roughly 10 degrees below normal. Brisk winds ushering in the cooler air will add to the chill.
As the winds calm and skies clear, a near repeat of Thursday night's chilly temperatures and frost concerns will unfold on Sunday night across the Northeast.
The frost should once again be primarily confined to the typically colder spots of the interior from northern Pennsylvania to New Hampshire, forcing residents to once again cover or move tender plants and vegetables inside.
Clouds spilling down from central Quebec should spare northern Maine from frost concerns. The air will be too "warm" for frost near the I-95 corridor and from central Pennsylvania southward, but many will likely want to wear jackets to work or school on Monday morning.
"The lengthening nights with clear skies can also create the perfect conditions for late-night and early morning fog, especially in the river valleys, where and when winds diminish," stated AccuWeather.com Expert Senior Meteorologist Alex Sosnowski.
As quick as the cool air filters into the Northeast, a surge of warmth and humidity will return for Tuesday and Wednesday. Temperatures on Wednesday are expected to reach or approach 90 degrees northward to Philadelphia.
The sticky conditions will persist through Thursday before another blast of cool air arrives late in the week. The clash of these two distinct air masses threatens to spark potentially damaging thunderstorms on Thursday afternoon.
The threat for such thunderstorms currently appears greatest from southeastern New York to Virginia, encompassing New York City and Washington, D.C.
Travel hazards, delays and disruptions associated with rain, ice and snow will continue over the Central states through the balance of the Thanksgiving weekend.
The current reprieve from heavy rain across southern India will not last long with the threat for flooding downpours set to return for the final days of November.
Sandra has weakened to a tropical storm but remains on track to make landfall in western Mexico with flooding rainfall on Saturday.
Heavy thunderstorms will continue to shift northward across central South America with the greatest threat for flooding focusing on northeastern Argentina and eastern Paraguay into Saturday morning.
Several days of heavy rain will bring the potential for significant flooding from the southern Plains to the middle Mississippi Valley into early next week.
Snow and ice storms have taken aim at the Central U.S. this week, while record-setting Sandra strengthened into a major hurricane south of Mexico.
Nation devastated by terrible floods -- 400 people killed.
O'Fallon, MD (1990)
Strong downburst from a thunderstorm caused an apartment to collapse, injuring 25 people.
New England Coast (1898)
Famous "Portland" storm formed off Cape Cod with loss of 200 lives. Many others were lost to the raging sea in 50 small vessels. A total of 27 inches of snow in New London, CT; 15 inches at Waterbury, CT. Peak wind was 72 mph in Boston. Boston received more than a foot of snow.