A summertime blast of heat and humidity will be moving into the northeast over the next 2 days, but the impact will be relatively short-lived. After a pattern that’s brought cooler than normal temperatures coupled with above-normal rain, it looks like Mother Nature will be turning up the heat, at least on a temporary basis.
High pressure will remain offshore of the east coast on Sunday, setting up strong return flow and allowing temperatures to continue to rise throughout the northeast. Humidity values will also rise in addition to the temperatures, however, heat index values will only reach into the low 90s for Sunday. It appears a surface trough will develop across the Mid Atlantic, possibly creating an area of instability with showers and storms over Virginia and North Carolina. It’s possible, although odds are low, some of that shower and storm activity could push into Maryland or Delaware too.
High pressure is forecast to remains anchored off the Southeast U.S. coast into the middle of the week. A hot and increasingly humid air mass will build in from the south and west on Monday. This sticky air mass will remain in place for Tuesday, although a cold front should push from north to south during the day. Cooler, but still mild conditions will return on Wednesday.