Warmth to keep fighting back in eastern US through much of October
By Alex Sosnowski, AccuWeather senior meteorologist
October 10, 2017, 2:55:20 AM EDT
While some brief episodes of cool air are forecast, most days through the end of October will be much warmer than average over much of the eastern half of the nation.
"We foresee no sustained cooling over the eastern half of the nation for the next two weeks [from Monday, Oct. 9, 2017]," according to AccuWeather Lead Long-Range Meteorologist Paul Pastelok.
Temperatures from the South Central states to the Eastern part of the nation will average 10-15 degrees above average.
Shorts and short sleeves may be needed to stay comfortable during the day, but a jacket may be needed at night for some people.
The pattern will allow warm-weather projects, such as paving and painting operations, that were delayed this summer to continue.
Recent rainfall from Nate and non-tropical systems have put moisture back into the ground in many areas. This will reduce the spike in temperature during the afternoon hours, as some of the sun's energy will be used to evaporate that moisture, rather than heat the ground and air in the lowest part of the atmosphere.
"Another factor against multiple days of extreme warmth will be cloud cover," Pastelok said.
US winter forecast: La Niña to fuel abundant snow in Rockies; Bitterly cold air to blast Midwest
Photos: Nate unleashes heavy rain, damaging winds across Gulf Coast
Why is there a secondary peak of severe weather in the fall?
"Since the days are much shorter now, when compared to August or early September, a few hours of clouds or fog can really hold temperatures back."
While temperatures may not be as extreme and persist as long as the peak of the heat in September, expect highs in the 70s to be common from Chicago to New York City. Highs are likely to be in the 80s on multiple days from Oklahoma City to Atlanta. There may be a day here and there where temperatures peak in the 80s and near 90 respectively.
At night, most people should be able to sleep without the air conditioner on. The lengthening nights during October will allow temperatures to slip back to 10 to 20 degrees lower than the previous day's high.
A northward bulge in the jet stream is forecast to persist over the southeastern half of the nation most of the time through much of the balance of the month.
The jet stream is a high-speed river of air at the level where jets cruise at. South of the jet stream, temperatures are often warm. Up until nearly the end of the month, the jet stream will extend from the central Rockies to southeastern Canada.
While the jet stream will occasionally dip southward for a couple of days here and there, it is forecast to spend much more time in that northerly position rather than dip deep into the south.
The warm weather may delay or prolong the viewing opportunity for the fall foliage in some areas, at least where prior drought or gusty winds and rain from Nate have caused the leaves to fall off in the first place.
The same pattern responsible for the persistent warmth will keep the door open for tropical activity in the coming weeks.
Comments that don't add to the conversation may be automatically or manually removed by Facebook or AccuWeather. Profanity, personal attacks, and spam will not be tolerated.
More Weather News
Weather News - July 21, 2019, 9:16:02 AM EDT
Millions of Americans remain under excessive heat warnings from the Eastern Seaboard to the central Plains, where AccuWeather RealFeel® Temperatures will once again dangerously soar past the century mark.
Weather News - July 21, 2019, 8:52:30 AM EDT
While the threat for severe weather has passed, more than 560,000 people have yet to get electricity restored across Michigan and Wisconsin.
Weather News - July 21, 2019, 5:46:17 AM EDT
The seasonable weather that has dominated the northwestern United States so far this month is coming to an end as heat surges northward through Tuesday.
Weather News - July 20, 2019, 11:29:47 PM EDT
AccuWeather checked to see if power companies are prepared for the oppressive weather and one company told us the precise temperature it's asking customers to set thermostats to during the heat wave.
Weather News - July 20, 2019, 5:45:37 PM EDT
Following the derecho that produced hurricane-force wind gusts in South Dakota and southern Minnesota on Saturday morning, new incidents of damaging winds and flooding are developing across the midwestern United States.
Stepping back in time: Mission control refurbished to the day Apollo 11 astronauts stepped foot on the Moon
Weather News - July 20, 2019, 5:22:20 PM EDT
Visiting mission control in Houston today looks exactly like it did 50 years ago when Neil Armstrong and Buzz Aldrin walked on the moon thanks to a long and detailed remodeling project.
Weather News - July 21, 2019, 7:29:35 AM EDT
Heat has already been blamed for the deaths of three people late last week, and more lives are in jeopardy with excessive heat warnings and advisories stretching from eastern Kansas and Oklahoma to Maine and South Carolina this weekend.
Weather News - July 21, 2019, 4:55:04 AM EDT
Danas continues to bring downpours and strong winds to South Korea after making landfall on Saturday.