After what many in the East would look like a perfect weekend with sunshine and warming conditions, AccuWeather meteorologists will say that the first week of May is going to bring a smorgasbord of weather conditions.
The second half of April turned out to be chilly for many across the Northeast. Cities like Buffalo, NY, to Philadelphia experienced temperatures, on average 3-4 degrees below normal since April 15.
Fortunately for those yearning for some late-spring warmth, near- to above-normal temperatures are on the way for the start of May. This warmup, however, will come at the cost of some wet weather.
“The active weather pattern and a lot of fluctuation in the position of the jet stream are expected across the East in the coming week, allowing for a new storm to push through every few days,” said AccuWeather Meteorologist Renee Duff.
The first wave of this wet weather, spoiling the sunny skies as of late, started Sunday. Along with the return of rain, some thunderstorms from eastern Ohio and southwestern Pennsylvania down through West Virginia, eastern Kentucky and western Virginia could bring some feisty thunderstorms into the evening.
During this time, thunderstorms could be capable of producing hail, as well as damaging winds up to the AccuWeather Local StormMax & trade of 75 mph. Downpours and gusty winds could make for slow travel in this are, including along portions of Interstate 70 and Interstate 64.
The rain showers will then expand through New England for Monday.
Behind this wave of wet weather, a surge of warm air from the Southeast is expected, allowing temperatures to trend closer to normal Monday and Tuesday.
For example, Washington, DC, is a high in the middle to upper 70s. and Baltimore on Monday, while temperatures are set to peak in the lower 70s in places from Pittsburgh to Philadelphia on Tuesday. Temperatures of this caliber are a few degrees above normal for the first week of May.
However, not every location is forecast to have these milder conditions every day.
“The amount of sun that makes it through the clouds this time of year greatly affects high temperatures in the Northeast.
The day that any city experiences is a little more sunshine, whether it is likely to be a little bit warmer, while the cooler days are likely to accompany clouds and the wet weather. Said clouds and showers are likely to keep it cooler than normal for New England cities like Hartford, Conn., And Boston for the first half of the week.
One such day, for many across the East, is likely to be Wednesday, when broadcasters generally forecast to extend from the New York-Canada border on the south through the Carolinas.
Some thunder may accompany this wave of rain, but downpours are likely to cause more localized flash flooding, mainly in low-lying and poor drainage areas. Instead, the expansive rainfall is likely to bring the pressure of warmer air across the East, returning temperatures closer to normal, or perhaps slightly below average by Thursday.
More generally cool conditions are likely to return towards the end of the week.
“Don’t put away those heavier jackets just yet! A more pronounced southward dive in the jet stream could target the Northeast late in the week, allowing chilly air to return,” Duff said.
Widespread snow, like what you experienced across the Northeast in late-April, not expected, according to AccuWeather meteorologists. However, some of the highest elevations could see snowflakes mixing with any rain that coincides with the cool-down.
As is normal for this time of year, shots of cool air could continue to make appearances in the Northeast through the first half of May.