Excessive high temperatures in the Philadelphia area have prompted officials to issue an air quality alert Monday.
The holiday weekend has remained hot with high temperatures in the upper 80s to around 90 so far. There will not be much change for the holiday itself as the heat continues. An approaching cold front tonight has triggered off some showers and thunderstorms across the region.
This first official weekend of summer ended up very pleasant with near average temperatures and low humidity. A trough or dip in the jet stream over the northeast this weekend has kept a cooler and drier air mass in place. As we move into the workweek the jet stream pattern will change a bit.
The last official weekend of spring brought temperatures above average in the mid to upper 80s. Humidity levels remain on the comfortable side through the weekend and will continue into the new workweek.
The weekend ends with a very humid air mass over the Delaware Valley. Dew points reached the 70s on Sunday which is very high. Dew points are another way to measure the humidity.
The past few days have been nice and comfortable temperature wise with highs in the upper 70s to low 80s. Humidity levels also have been low as a cooler air mass has settled into parts of the mid-Atlantic and Northeast.
Of course, if you’ve stepped outside today, you’ll probably get it in a hot second (heh, heh) – the classic “Heat Wave” by Martha and the Vandellas. And that’s exactly what we’ve got going on this week – our very first heat wave of the season.
After the unsettled weather last week, the pattern has shifted to more summer-like for this week. Warm temperatures, humidity, and shower and storm chances return to the forecast this week.
After being spoiled with some stellar weather last week, this week will be the opposite. A large upper-level storm system situated over the Ohio Valley is cut-off from the jet stream.
The upcoming days will be a good time to spend some time outside if you can. Some great May weather is on tap with sunshine and highs in the 70s.
The overall weather pattern this weekend kept temperatures right where they should be for this time of year.
Since the severe weather ended on Thursday, the weather has improved very slowly. Even though the rain ended, an upper-level disturbance was still situated over the area Friday and early today. This led to clouds developing each morning as the sun warmed the air up.
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The umbrellas will be handy tonight and this weekend as more showers move through the Philadelphia region.
This spring, it seems we’re having a hard time stringing together two or three nice days in a row!