Recent mild weather will culminate on Thanksgiving Day, when Indianapolis and much of Indiana will warm to at least 60 degrees.
Sharply colder weather will follow Friday through Sunday.
Thursday, after patchy morning fog, sunshine and southerly winds will lift temperatures to at least 60 to 65 degrees throughout India. Some spots in the south will warm even more.
By Saturday, though, daytime readings may be off by as many as 30 degrees versus highs Thursday.
The agent for weather change, a cold front from the northwest, will make its way through Indiana to the accompaniment of a little rain Thursday night into Friday.
A few snow showers will even dust the far north as cold air flows off Lake Michigan Friday afternoon and night.
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Summer warmth vanished from the United Kingdom since the middle of the month and is not expected to return anytime soon.
A rare storm for late July will deliver drenching rain and miserable conditions to a large part of the mid-Atlantic and southern coast of New England to end the week.
More than 4,000 firefighters are trying to contain multiple fires across southern France.
While the north-central United States will get a break from storms in some locations and heat in others late this week, the pattern will resume as July ends and August begins.
Tropical storm Nesat is currently to the east of the Philippines and will bring dangerous impacts to Luzon and Taiwan this week.
As thunderstorms begin to diminish away from the Four Corners states, a resurgence of heat will arrive in the balance of the western United States by the weekend.
Although the warmer months are popular for training, scorching summer temperatures can quickly mean serious trouble for athletes.