|Dew Point:||-40.0°F (-40.0°C)|
|Sea Level Pressure:||30.52" (1033.4 mb)|
Mostly ClearLow: 57
Mostly Sunny then Slight Chance Rain ShowersHigh: 71 Low: 62
SunnyHigh: 75 Low: 62
Mostly SunnyHigh: 75 Low: 56
SunnyHigh: 66 Low: 55
Mostly clear, with a low around 57. Southwest wind around 8 mph.
A slight chance of rain showers after 2pm. Mostly sunny, with a high near 71. Southwest wind around 7 mph. Chance of precipitation is 20%.
Partly cloudy, with a low around 62. Southwest wind around 7 mph.
Sunny, with a high near 75. Southwest wind 6 to 9 mph.
Mostly clear, with a low around 62. Southwest wind around 12 mph.
Mostly sunny, with a high near 75.
Partly cloudy, with a low around 56.
Sunny, with a high near 66.
Mostly clear, with a low around 55.
... High pressure will remain over the region through the weekend with mostly dry conditions and above normal temperatures expected. The high will shift off the southeast coast by Monday as a cold front approaches from the Ohio Valley. In the wake of the frontal passage, high pressure will situate itself over the region once again through the middle of next week.
NEAR TERM /THROUGH SATURDAY/... Tranquil conditions through tonight as high pressure centers itself over the Mid-Atlantic. This will lead to clear skies, light winds, and dry conditions across the CWA. There is a small cluster of showers and thunderstorms over central Ohio this evening, and some leftover clouds or sprinkles may reach the Allegheny Highlands around daybreak. Otherwise, southerly winds will allow for a warming trend heading into the weekend, with highs this afternoon topping out in the upper 70s to low 80s, falling back into the 50s tonight under prime radiational cooling conditions.
SHORT TERM /SATURDAY NIGHT THROUGH SUNDAY NIGHT/... The aforementioned high will drift a little further to our south and east through the weekend, allowing for further warming under a southerly breeze. High temperatures will extend into low to middle 80s on Saturday, topping out in the middle to upper 80s Sunday with plentiful sunshine.
Precipitation wise, a slight chance of showers and a thunderstorm will be possible Saturday afternoon west of the Blue Ridge as a weak upper level disturbance tracks across Pennsylvania. GFS is a bit more bullish on QPF/coverage, while the NAM/ECMWF favoring the drier end of the spectrum. As such, feel a slight chance covers this well for now. Given warming temperatures and slightly lower heights, there will be some weak instability available across the mountains, with MUCAPE values ranging between 500-1000 J/kg. Thus have inserted the mention of thunder to the gridded database. Any showers or thunderstorm will quickly dissipate early Saturday evening as the sun sets. Thereafter, dry conditions return areawide for the balance of the weekend.
LONG TERM /MONDAY THROUGH FRIDAY/... A positively tilted trof over the wrn Great Lks Monday is forecast to deepen and become a closed low as it crosses the ern Great Lks, southern Ontario, and the St. Lawrence River Valley Tuesday. This help push a cold front through the area late Monday. Showers appear likely along the front Monday afternoon mainly over the Appalachians and areas west of Route 15 with model guidance showing little or no accumulation east of Route 15. Cooler temperatures are expected for the middle of next week under the influence of the upper level trof. Heights begin to rise sharply on Wed with strong ridge axis settling over the area by next weekend with 500 mb heights progged higher than with the ridge currently over the area. This will lead to a significant warming trend with temperatures aoa 90F for the second half of next week with record high temperatures possible for late Sep and continued dry weather.