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Fall Forecast: Warm Up or Cool Down?

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Fall is just around the corner! While many consider Labour Day the unofficial gateway to fall, it’s actually the Autumnal Equinox, which ushers in the new season on Monday, September 22, at 4:02 p.m. (EDT). In many areas it already feels like fall. Will these cooler conditions continue?

Overall, we’re predicting above-normal temperatures for autumn from coast-to-coast. Precipitation-wise, our long-range forecast predicts drier-than-normal conditions for much of the nation.

You’ve already read our winter forecast for Canada, but here’s what to expect for the autumn months:

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Fall Foliage
Now that the days are growing shorter, the leaves are starting to change color. Our readers often ask if the weather has any effect on fall foliage, and while the amount of daylight is what signals the leaves to change color, weather does play a role in the intensity and vibrancy of colors.

“Drought is the enemy of a good fall,” says biology professor Howard Neufeld of Appalachian State University. “The trees have to be in a healthy state, not water stressed, heading into the season.” So those areas that have been abnormally dry may not see  the dazzling colors they’re used to.

Learn how and why leaves change color!

And we all know a good wind storm can take the leaves down prematurely. We’re forecasting that during the timeframe of October 12-15 a strong disturbance sweeps east off the Atlantic coast causing very windy and wet conditions, meaning leaf peeping may be compromised.

Tropical Storms?
According to the Canadian Farmers’ Almanac, we are forecasting the threat of a hurricane for Nova Scotia and Prince Edward Island in mid-September, and some days later, another tropical cyclone might spin up again near Nova Scotia, but may pose more of a threat to Newfoundland.

Will Your Thanksgiving Be A Turkey?
A strong disturbance sweeps east to off the Atlantic coast, unfortunately coinciding with the Thanksgiving holiday: stormy with gale-force winds along coastal areas. The best weather prospects for Thanksgiving are over western areas: squally over central and eastern Ontario area; clearing over western sections. All regions are clear by the 11th.

Halloween – Weather Tricks or Treats?
Trick-or-treaters will enjoy mostly fair weather except on the west coast where it will be stormy and colder – better break out the cool weather costumes!

Will Snow Fall In Fall?
Before winter officially arrives, many parts of the country may see some wintry-like conditions. Most areas will see unsettled weather by Remembrance Day with temperatures dropping. The Rockies could see a heavy snowfall (15 to 30 centimeters) toward the end of November.

Conditions will turn unsettled from coast to coast by late November into December.

See how cold and when the snow should arrive here.

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1 DARLENE BORDELON { 09.26.17 at 10:01 am }


2 Leafpeeper { 09.22.17 at 9:21 pm }

Snowfall in Fall! First day of Autumn in California and the weather is fine…and confused! We’ve got autumn change just beginning, and snow in case you want to skip straight to winter. What’s 2017’s first official fall afternoon look like in your neck of the woods?

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