... Colder weather is expected for the rest of the week. Snow showers will be possible Thursday and Friday north of I 80 and in the ridges. A low pressure system may bring widespread snow late this weekend.
NEAR TERM /THROUGH TONIGHT/... No changes were made to the forecast this morning. A few light flurries are possible today with a briefly saturated layer near 850mb.
Otherwise, brief zonal flow will keep weather mainly quiet for Wednesday. Highs will be slightly cooler than the climatological norm, but lows will be warmer with continuous cloud cover.
SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/... Northwest flow across the lakes associated with a crossing shortwave trough will bring chances for light, lake-enhanced showers Thursday afternoon into Friday morning with light upslope snow also possible in the PA ridges. However, dry air in place and a shallow mixing layer should keep accumulation totals to around a couple inches or less in those areas.
Cooler than average temperatures are expected through the period, with highs only topping out in the 20s Thu and Fri afternoons. With breezy conditions, wind chills will dip into the single digits for most of the area Friday morning.
LONG TERM /SATURDAY THROUGH TUESDAY/... It is becoming likely that a low pressure system undergoing cyclogenesis will propagate through the Midwest, followed by the Ohio Valley late this weekend and early next week. It appears several strong ascent mechanisms will be in play, with ample moisture. There still remain many questions regarding precipitation type, timing, and consequently, accumulation but details will become more clear with several more model initialization periods.