Barometric Pressure Forecast for Gallatin, Tennessee
Barometric pressure forecast for Gallatin, Tennessee — on Old Hickory Lake in Sumner County, northeast of Nashville between the Basin and the Highland Rim. See current barometric pressure and what it means for weather-sensitive people.
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Pressure and weather in Gallatin
Gallatin lies on the impounded Cumberland River in the rolling limestone country where the fertile Nashville Basin begins to rise toward the wooded escarpment of the Highland Rim. Middle Tennessee sits in the corridor that funnels Gulf moisture northeast toward the Ohio valley, which gives it an active and rather long severe season, running from March through May and returning in November. Squall lines here often arrive overnight, preceded by a steep pressure fall through the evening. Winter is the more complicated season, because the region sits close to the average rain-snow line and shallow cold air pressing down the Cumberland valley from the north can undercut warm southerly flow to produce damaging ice storms. Summer is hot and humid with a near-motionless barometer for weeks, punctuated by scattered afternoon storms, and October is consistently the driest and most settled month.
What this means for you
Overnight squall lines mean the steepest pressure falls here often happen while you are asleep. A migraine tracker app with automatic logging catches changes that a manual note at breakfast will miss.