Synopsis...
A strong ridge of high pressure will remain over us for the next couple day, before a frontal system pushes it to the east. While this frontal system is not all that strong, it may bring a chance of a scattered shower, and knock temperatures down to or below seasonal averages for this time of year. A moist air mass will follow this front from the southwest, and will bring the state its greatest chance of rain by Monday.
Short Term...
The every reliable WRF model keeps the ridge of high pressure strongly in place Thursday and Friday. For both days, the commonwealth will be mostly to completely clear in terms of sky cover, with temperatures staying seasonable or a couple degrees above average. Regardless, temperatures are going to be very similar for these two days. The early part of the day Saturday looks to remain clear, though the ridge begins to retreat by this time. The commonwealth (mainly the western regions) should see more cloud cover build in as the day goes on.
Long Term...
By Sunday, the WRF pushes in a weakening frontal system. This system won't pack that much precipitation when it first arrives - an isolated shower at best - most areas will see mostly cloudy skies. By Sunday night, however, a moist air mass looks to push its way up from the southwest. Most areas will stay cloudy through Sunday night, but the arrival of this moist air mass will bring most areas a light shower by the afternoon on Monday. MOS outputs show a somewhat significant cooldown once this air mass arrives. The timing of when this system comes in and how long it persists over the commonwealth will be key points to watch through the end of the week.
Andrew Dzambo
We Are... Penn State Meteorology
A strong ridge of high pressure will remain over us for the next couple day, before a frontal system pushes it to the east. While this frontal system is not all that strong, it may bring a chance of a scattered shower, and knock temperatures down to or below seasonal averages for this time of year. A moist air mass will follow this front from the southwest, and will bring the state its greatest chance of rain by Monday.
Short Term...
The every reliable WRF model keeps the ridge of high pressure strongly in place Thursday and Friday. For both days, the commonwealth will be mostly to completely clear in terms of sky cover, with temperatures staying seasonable or a couple degrees above average. Regardless, temperatures are going to be very similar for these two days. The early part of the day Saturday looks to remain clear, though the ridge begins to retreat by this time. The commonwealth (mainly the western regions) should see more cloud cover build in as the day goes on.
Long Term...
By Sunday, the WRF pushes in a weakening frontal system. This system won't pack that much precipitation when it first arrives - an isolated shower at best - most areas will see mostly cloudy skies. By Sunday night, however, a moist air mass looks to push its way up from the southwest. Most areas will stay cloudy through Sunday night, but the arrival of this moist air mass will bring most areas a light shower by the afternoon on Monday. MOS outputs show a somewhat significant cooldown once this air mass arrives. The timing of when this system comes in and how long it persists over the commonwealth will be key points to watch through the end of the week.
Andrew Dzambo
We Are... Penn State Meteorology
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