Cooler air to slice through northeastern US heat this weekend

Once cooler air presses into the northeastern United States during Friday and this weekend, there are no signs of heat returning to the region through the end of May.

Following the hot weather into Thursday, some people will be trading shorts and short sleeves for jackets and long-sleeve attire as they have done so often this spring. A few may have to tap the thermostat to turn on the furnace for a few hours.

The leading edge of cooler air will be marked by showers and locally gusty thunderstorms from late Thursday into Friday.

Static NE Thursday P. Lang.

Heat will get hacked away from north to south in the Northeast as the week draws to a close.

Temperatures will be slashed by 20 to 50 degrees Fahrenheit from the crest of the daytime heat into Thursday to the bottom of the nighttime chill this weekend and next week.

In Boston, daytime highs will be slashed 30 degrees from a high near 90 on Thursday to a high near 60 on Saturday. Highs in New York City will be slashed by 20 to 30 degrees during the period.

Static Cooler Saturday Northeast Saturday

"An east to northeast breeze and/or cloud cover will add to the dramatic cooldown along much of the Interstate-95 corridor and the immediate coastal areas," according to AccuWeather Chief Meteorologist Elliot Abrams.

These conditions can result in AccuWeather RealFeel® Temperatures 5 to 8 degrees lower than the actual temperature during the daytime.

Even areas as far south as Maryland and Virginia will notice the change.

In Washington, D.C., a heat wave to end the week will be followed by multiple nights with lows in the 50s and some days with highs in the 70s this weekend into next week.

"In the Ohio Valley, from Pittsburgh to Cincinnati and Indianapolis, the main thrust of the cooldown will be delayed until early next week," according to AccuWeather Long-Range Meteorologist Max Vido.

Static NE Cool May 20 to 31

Despite the dramatic return of cool weather, the overall pattern most days will not be as cold as that of the first couple of weeks of May.

Since the sun is as strong as late July, where the sun is out, it will negate some of the coolness during the day.

At night, only the chilliest spots of northern upstate New York and northern New England are likely to dip close to frosty levels during a couple of instances. Areas of the Lower Peninsula of Michigan that were hit hard by freezing temperatures earlier in May should not have to worry, despite the start of cooler daytime highs. Cloud cover will tend to stabilize temperatures at night.

Most days and nights from this weekend through the Memorial Day weekend are likely to feature temperatures within a few degrees of average, instead of temperatures of 10 to 20 degrees below normal.

"With the exception of Florida, areas east of the Rockies will not have widespread above-average temperatures during the last week of the month," Vido said.

There can be a day here and there where temperatures spike to warm levels briefly.