Hot, muggy weather forecast to continue along with risk of excessive rainfall

Thunderstorm and flash flood warnings for parts of Allegheny and Westmoreland counties on Sunday have expired, but the risk for more heavy rain along with oppressively muggy weather continues into the coming week, according to the National Weather Service.

The weather service issued warnings for severe thunderstorms and flash flooding Sunday afternoon for parts of northeastern Allegheny and northwestern Westmoreland counties including Plum, New Kensington and Lower Burrell.

While some areas saw close to 2 inches of rain, there had not been any reports of severe flooding other than yards being waterlogged, meteorologist David Shallenberger said.

Every day through mid-week will be much like Sunday, Shallenberger said, with a marginal chance for excessive rainfall on Monday and again on Wednesday, when it could lead to flooding.

After a high of 80 on Monday, upper 80s to near 90 is forecast for Tuesday and Wednesday, Shallenberger said.

More notable may be the dew point, a measure of how much moisture is in the air, which is expected to remain in the 70s for the foreseeable future. An expected dew point in the low-70s on Tuesday and mid-70s on Wednesday could trigger heat advisories, he said.

A higher dew point means there is more moisture in the air. Generally, dew points under 60 are considered comfortable, while over 60 is uncomfortable and 70 is oppressive.