I-81 · PA / NY
I-81 from Harrisburg to Syracuse: road conditions right now
Harrisburg, PA to Syracuse, NY
I-81 through northeastern Pennsylvania and the Southern Tier crosses the Poconos and Endless Mountains, then enters New York's lake-effect belt at Cortland and Syracuse. Snow squalls, the short violent bursts that cause pileups, are the signature hazard.
Checking the forecast, NWS alerts, and DOT feeds for I-81 right now…
Why this stretch is hard in winter
- Snow squalls create whiteouts in minutes; NWS issues Snow Squall Warnings that this page shows as they happen.
- The Hazleton–Wilkes-Barre grade and the stretch north of Scranton are the usual crash sites.
- Lake-effect bands off Lake Ontario reach Syracuse and Cortland with 2 to 4 inches an hour.
What this page checks
- Hourly forecast at every checkpoint for the time you would be there: temperature, precipitation type and rate, gusts, visibility.
- Active National Weather Service watches, warnings, and advisories on the route.
- Snow on the ground (NOAA SNODAS) and the Weather Prediction Center winter impact outlook.
- Pavement temperature and surface state from state DOT road sensors, when you are leaving within a few hours.
- Chain controls, closures, and winter road condition reports from state DOT feeds where they are published openly.
- Seasonal closures of mountain roads the router might otherwise use.
Official sources for this corridor
Questions drivers ask about I-81
- What is a snow squall warning?
- A short-fused NWS warning, like a tornado warning, for a burst of heavy snow and gusty wind that drops visibility to near zero on the highway for 15 to 60 minutes. Slow down before you enter it; most I-81 pileups happen in squalls.
Conditions change by the hour. This page is a planning aid built on public forecasts and DOT feeds; the road authority linked above has the final word on closures and chain requirements.
Other corridors: I-80 across Wyoming · I-70 through the Colorado mountains · I-80 over Donner Pass · I-90 over Snoqualmie Pass · I-84 through the Blue Mountains · I-15 over Cajon Pass · all corridors