Barometric Pressure Forecast for Tewksbury, Massachusetts
Barometric pressure forecast for Tewksbury, Massachusetts — in the lower Merrimack valley north of Boston. See current barometric pressure and what it means for weather-sensitive people.
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Pressure and weather in Tewksbury
Tewksbury lies in the Merrimack valley about twenty-five miles north of Boston, between Lowell and the New Hampshire line, on gently rolling ground drained by the Shawsheen and Merrimack rivers. Its inland position within a coastal state is the defining feature. When a nor'easter comes up the seaboard, the boundary between rain along the shore and heavy snow inland very often sets up close to this latitude, which is why the Merrimack valley so frequently ends up with the largest storm totals in eastern Massachusetts. The pressure story is the same as the coast — deep lows tracking northeast with falls of fifteen to twenty-five millibars in a day — but the surface conditions are colder and the storms last longer. Summer is calm and humid with scattered afternoon thunderstorms drifting down from southern New Hampshire. The active season for weather-sensitive residents runs from late November through early April.
What this means for you
The same storm can read as a mild rainy day at the coast and a significant snow event here, but the barometric signal is nearly identical. That makes current barometric pressure a more portable trigger measure than the local forecast — log it in a headache tracking app and compare storms rather than seasons.