Barometric Pressure Forecast for Brockton, Massachusetts
Barometric pressure forecast for Brockton, Massachusetts — in Plymouth County between Boston and Cape Cod, close enough to the ocean that nor'easters land right on the rain-snow line. See current barometric pressure and what it means for weather-sensitive people.
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Pressure and weather in Brockton
Brockton sits in Plymouth County about twenty miles south of Boston on the low, flat terrain between Massachusetts Bay to the northeast and Buzzards Bay to the southwest, with Cape Cod Bay curving away to the east. Water on three sides at moderate distance puts the city in one of the trickiest forecast positions in New England: close enough to the ocean for marine air to reach it easily, far enough inland that it does not always win. Barometric pressure here is driven by coastal cyclones. Lows moving up the eastern seaboard reach the waters south of New England, encounter the sharp thermal gradient between the cold continent and the warm shelf water, and intensify rapidly. In the strongest cases the barometer falls further in a single day than it moves in an average month, and the recovery behind is nearly as fast as high pressure builds down from Canada. Whether Brockton gets snow or rain from those storms often comes down to whether the low tracks inside or outside the benchmark waters near Nantucket, a distinction of fifty miles that changes everything. Spring brings back-door fronts and long raw easterly spells off the still-cold Gulf of Maine. Summer is humid, thundery in the afternoons and barometrically quiet, though September can deliver the remnants of a tropical system tracking up the coast, with a slow deep fall and heavy rain. Autumn is the most settled stretch until the coastal storm season resumes in November. A barometric pressure forecast for Brockton is most valuable from November into April.
What this means for you
Can barometric pressure cause headaches? Rapidly deepening coastal lows produce steeper falls than almost any other weather system in the eastern United States, which is why southeastern Massachusetts residents so often say they feel a storm a day ahead of it. Rate of change matters more than the absolute reading. Use this barometric pressure forecast with Pressure Pal as a migraine tracker app to see pressure change today and get warning before the next nor'easter deepens offshore.