Pennsylvania winter outlook
Pennsylvania is split down the middle by the Appalachians, and that ridge does more to shape a school decision than any single snowfall total. Check the calculator, then read your side of the state.
Live Pennsylvania forecast estimate
Enter a location to compare tomorrow's snow, ice, temperature, wind and morning timing.
Regional pattern
A single state-wide snowfall figure rarely explains a school decision here. These are the patterns worth knowing before reading any Pennsylvania forecast.
Western Pennsylvania sits on the Appalachian Plateau downwind of Lake Erie. Northwest flow behind a cold front lifts moist air up the plateau and produces repeated rounds of light to moderate snow rather than one dramatic total. Because the region is cut by steep river valleys, an inch or two on a graded street can cause more trouble than a larger total on flat ground.
In southeastern Pennsylvania, cold air often gets trapped at the surface against the eastern slopes of the mountains while milder air arrives aloft. That is the classic setup for sleet and freezing rain. These events are dangerous precisely because they look minor: a glaze measured in hundredths of an inch can close a district that would have run buses through six inches of dry snow.
Central Pennsylvania frequently sits on the dividing line of a storm, with snow on the ridges and mixed precipitation in the valleys. Districts here often span both, so a superintendent may be looking at genuinely different conditions at opposite ends of one bus network. Expect forecast uncertainty in this part of the state to stay high until close to the event.
Much of Pennsylvania is served by geographically large districts running long rural routes on secondary roads that get treated after the highways. Combined with early high-school start times, that means the decision often hinges on conditions between roughly 5 and 7 a.m. rather than on the daily snowfall total.
Permanent city pages
Each page loads its own coordinates, its own local closure factors and its own official sources. Any other Pennsylvania community can be searched directly in the calculator above.
The percentage on this page is a weather-based planning estimate. It scores forecast snow and ice, temperature, wind chill, morning timing, broad area type and school level, and it shows each of those with its own value and published weight. It does not observe road treatment, staffing, building utilities or the judgement of the people who actually make the call. The methodology page documents every threshold and the accuracy and limitations page is explicit about the gaps.
No school system in Pennsylvania publishes a snowfall number that triggers a closure, and this site does not invent one. Use the estimate to decide whether a backup plan is worth arranging, then let the official announcement decide what actually happens.
Primary weather and road-condition sources covering Pennsylvania. School and transportation decisions come from individual school systems.
Pennsylvania questions
Cold air gets trapped against the eastern slope of the Appalachians while warmer air moves in above it. Rain falls through the warm layer and freezes on contact with cold surfaces. Because the accumulation is a glaze rather than a depth, it defeats plowing and creates immediate traction problems on hills, bridges and sidewalks.
It requests a forecast for whichever coordinates you choose, so elevation enters indirectly through the weather model, but the calculator has no knowledge of which side of a ridge a bus route climbs or how a valley floor differs from the hilltop above it. In this terrain, pick the location nearest the school and read borderline results cautiously.
No. State travel restrictions and school closures are separate decisions made by different authorities, though a restriction on a major route is obviously relevant information for a district that buses students along it.
Yes. Type the borough or township name with the state, or use a ZIP code. The published city pages cover the largest metros, and the calculator search covers far more locations.