... Rain and above normal temperatures today. Much colder air moves in on Tuesday, changing any left over rain to snow. Dry and cold for the remainder of the week.
NEAR TERM /UNTIL 6 PM THIS EVENING/... Widespread, soaking rain today. Rain rates will be elevated as a strong low-level jet noses in.
In general around an .75 to 1 inch of rain is expected across the region, most of which will fall today. Given the time frame of accumulation, and the lack of convection, water issues are not anticipated.
SHORT TERM /6 PM THIS EVENING THROUGH WEDNESDAY/... Rain will taper off this evening as the best upper level support swings to the northeast. Showers overnight will be driven by the crossing cold front.
Much colder air will rapidly invade the area on Tuesday. By Tuesday afternoon, the cold front will be well to the southeast of the region. However, The main moisture plume gets hung up behind the front as it awaits a push from an upper level system moving through the western Great Lakes. The cold air will quickly catch up to the stalled moisture plume and change the rain to snow. Models are finally in good agreement that most of this moisture, and resultant snow, will setup to the south and east of PIT. These areas would be the focus for any accumulations, particularly over the higher elevations.
The airmass change on Tuesday will promote falling temperatures.
The snow will drift southeastward Tuesday night as the shortwave, in the heart of the cold air, drifts into central Ohio. Snow should end over the SE ridges shortly after dawn on Wednesday.
A cold, but much drier air mass will encompass the region on Wednesday. Temperatures will be below normal, but the sun should make an appearance.
LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/... Cold air will remain in place through Thursday, ejecting to the east on Friday. Temperature moderation will continue into the weekend. The overall pattern looks dry until Saturday, when rain moves back into the area.