Barometric Pressure Forecast for Sharon, Pennsylvania
Barometric pressure forecast for Sharon, Pennsylvania — on the Shenango River in Mercer County, on the Ohio border below Lake Erie. See current barometric pressure and what it means for weather-sensitive people.
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Pressure and weather in Sharon
Sharon sits at about 900 feet on the Shenango River in the northwestern corner of Pennsylvania, roughly forty kilometres south of Lake Erie and right on the Ohio line. That position places the town on the southern fringe of the Erie snowbelt. When cold air crosses the relatively warm lake on a northwesterly flow through late autumn and early winter, bands of lake-effect snow organise over the water and drift inland, and Mercer County catches the tail end of them, receiving considerably more snow than places the same distance from the lake to the east or west. Lake-effect events are notable barometrically for what they lack, because the snow falls under a rising or steady barometer behind a departing low, which is why a heavy snowfall here is not always preceded by the pressure fall people expect. The larger swings come from the classic Great Lakes storm track, with lows crossing from the Ohio Valley producing falls of eighteen to twenty-six hPa and a rain-to-snow transition as they pass. Clippers cross fast and dry. The town also sits in the corridor where prolonged freezing rain develops when cold air is trapped at the surface below milder air aloft.
What this means for you
Lake-effect snow arrives on a rising barometer, which breaks the usual mental link between heavy weather and falling pressure. Checking the current barometric pressure during a snow band here often shows the opposite of what people assume.