The temperature swing isn’t likely to send many North Texans to the back of the closet in search of sweaters.
But, after the mercury flirts with a high of 100 degrees Monday afternoon, meteorologists expect a drop of more than 30 degrees with overnight lows in the upper 60s by Tuesday night.
A cold front is expected Monday night that will bring much cooler temperatures through the end of the week, said Jesse Moore, a meteorologist with the National Weather Service.
Between Monday and Wednesday, temperatures in the Midwest will be as much as 15 degrees cooler than normal, with the biggest drops seen close to the Great Lakes. The clouds and rain expected behind the front will keep temperatures cool in Denton County and the rest of North Texas, Moore said.
High temperatures in the area Wednesday through Friday are expected to be in 80s.
“Without the clouds, it would creep back up into the lower 90s,” Moore said.
Rain should be widespread, Moore said, with many areas getting an inch of rain or more.
Meteorologists have become increasingly confident with the unusual pattern because it has been showing up in their models for several days now, Moore said.
Typhoon Neoguri, which became a “super typhoon” when its winds reached 150 mph, has altered the path of the North Pacific jet stream, allowing polar air behind a trough of low pressure to spill out of Canada and into the Midwest, according to Jeff Masters, the meteorology director at Weather Underground.
While similar to the polar vortex pattern last winter that broke cold weather temperature records in numerous states, there are key differences, Masters said. This air mass is coming from western Canada and not directly from the Arctic, plus the polar vortex is not nearly as strong in the summer — and sometimes breaks down completely.
Meanwhile, Seattle and the usually temperate Pacific Northwest will be affected by the shifting jet stream differently. Highs there could reach 90 or higher next week.
The Associated Press contributed to this story.
PEGGY HEINKEL-WOLFE can be reached at 940-566-6881 and via Twitter at @phwolfeDRC.
THIS WEEK’S FORECAST FOR DENTON
Today: Sunny, with a high near 99. Lows in mid-70s.
Monday: Mostly sunny and hot, with a high near 100. Lows in mid-70s.
Tuesday: Partly sunny, 30 percent chance of showers and thunderstorms. Highs in low 90s, lows around 70.
Wednesday: Mostly cloudy, 50 percent chance of showers and thunderstorms. Highs in lower 80s, lows around 70.
Thursday: Cloudy, 40 percent chance of showers and thunderstorms. Highs in upper 80s, lows in upper 60s.
Friday: Partly sunny, 30 percent chance of showers and thunderstorms. Highs in the mid-80s, lows in the mid-70s.
Saturday: Mostly sunny, 20 percent chance of showers and thunderstorms. High near 92.
SOURCE: National Weather Service