Barometric Pressure Forecast for Southbury, Connecticut
Barometric pressure forecast for Southbury, Connecticut — in the Housatonic Valley below the Litchfield Hills. See current barometric pressure and what it means for weather-sensitive people.
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Pressure and weather in Southbury
Southbury sits where the Pomperaug joins the Housatonic, in a valley cut into the western Connecticut uplands with the Litchfield Hills rising to the north. Elevation within the town runs from under 200 feet in the river bottom to over 800 on the ridges, and that spread decides a surprising amount of the local weather. Cold air drains off the hills into the valley on clear calm nights, so frost arrives earlier and lingers later along the river than on the higher ground above it, and radiation fog forms readily through autumn. In winter the town sits close to the average position of the rain and snow line during coastal storms, which is the defining local difficulty: a nor'easter that gives the Long Island Sound shoreline plain rain can drop a foot of snow on the ridges here, and the boundary can shift several miles in an hour. Those coastal lows produce the deepest falls of the year. Summer brings humid southwesterly flow, thunderstorms breaking over the hills in the late afternoon, and the occasional tropical remnant that puts the Housatonic over its banks.
What this means for you
A single coastal low can deliver rain in the valley and heavy snow on the ridge above it from what looks like the same pressure trace. Treat a barometric pressure forecast here as a measure of the system's strength rather than a prediction of what falls.