A sudden pattern change will dramatically heat up the East and cool down the West by the weekend.

'After record cold and snow in the East, a dose of late spring and summer is coming.

After a weeks-long stretch of chilly weather in the East and scorching warmth across the West, the stubborn pattern dominating the nation’s weather is just days away from easing its harsh grip on the country. A dramatic warm-up is in store for cold-weary residents in the Northeast, where temperatures up to 30 degrees below normal and even snow made the start of May feel more like March.

Meanwhile, the unbearable heat sizzling the Southwest has begun to ease. Monday could be the first day in a week that Phoenix doesn’t hit 100 degrees, a welcome relief from the brutal scorcher that has brought summertime temperatures a month ahead of schedule.

The dramatic changes come as a weather pattern shift teeters the United States’ meteorological seesaw in the other direction. It’s set to shuffle the obstinately stagnant air masses, but it could also favor a flurry of active weather in the nation’s heartland.'>>>

https://www.washingtonpost.com/weather/2020/05/11/weather-pattern-change/?