Forecast Pennsylvania is the definitive portal for the Keystone State's weather and climate — built to make the official National Weather Service forecast fast, clean, and highway-clear for all 67 Pennsylvania counties, from the Delaware and Philadelphia west along the Turnpike over the Allegheny Front to Pittsburgh, and north to Erie.
Pennsylvania is 300 miles wide and the Allegheny Front cuts it in half. East of that escarpment the state belongs to the coast: Philadelphia runs the warmest and most humid summers in the Northeast, and the rain–snow line spends every winter arguing its way up the Susquehanna. West and north of it the state belongs to the lakes: Erie takes a hundred inches of snow a year and once took thirty-four in a day, and the Laurel Highlands and the Poconos catch upslope out of the same machine. Between them run the rivers that have done the real damage — Agnes on the Susquehanna in 1972 is still the flood of record, and Johnstown is Johnstown. Forecast Pennsylvania is built around that divide.
The look borrows from the American Interstate system — the reflective paper, the green guide signs, the blue service signs, the brown recreation signs, and the red-white-and-blue route shields — set in Overpass, the typeface drawn from the Highway Gothic lettering on those signs. No state has a better claim on it: the Pennsylvania Turnpike opened in 1940 as the first long-distance controlled-access highway in America, and every Interstate in the country is descended from it. Pennsylvania takes a warm limestone paper and an anthracite accent, on slate — the hard coal that is very nearly Pennsylvania's alone.
Pennsylvania is covered close-up by 8 region sites, each on its own subdomain of forecastpenn.com — the same maps, the same live radar and the same climate record as this site, drawn to one metro or region instead of the whole state, with a page for every city in it. They are part of Forecast Pennsylvania, not separate sites: /about on any of them lands back here.
Pennsylvania touches six states and all six are live: Forecast New York along the northern line, Forecast New Jersey across the Delaware, Forecast Maryland below the Mason–Dixon Line, Forecast Ohio off the western edge, Forecast Delaware across the Twelve-Mile Circle at the southeastern tip, and Forecast Virginia, which carries West Virginia up to the southwestern corner — each tinted in its own accent on the hero map and clickable from it, the most companions any site in the network has so far. The rest of the Forecast <State> network is part of the same system.
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