Barometric Pressure Forecast for Shakopee, Minnesota
Barometric pressure forecast for Shakopee, Minnesota — in the Minnesota River valley in Scott County, southwest of Minneapolis. See current barometric pressure and what it means for weather-sensitive people.
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Pressure and weather in Shakopee
Shakopee sits on the floor of the Minnesota River valley, a trench roughly a mile wide and 200 feet deep that was cut not by the modest river occupying it today but by the glacial River Warren draining Lake Agassiz at the end of the last ice age. Living inside that trench gives the town a different daily climate from the uplands a few miles away. Cold dense air drains into the valley overnight and pools there, so calm mornings are routinely several degrees colder on the valley floor than in the suburbs on the bluffs above, and river fog forms readily in autumn and spring when water and air temperatures diverge. The synoptic drivers are the standard Upper Midwest set: Arctic outbreaks with pressure rises above twenty-five hPa and readings that can exceed 1045 hPa, Alberta clippers crossing fast with sharp shallow falls, and Colorado lows producing the heavy snows. What the valley adds is spring flooding, since snowmelt from an enormous agricultural watershed to the west funnels past the town through March and April, sometimes for weeks at a time. Summer brings humid air that lingers on the valley floor after the uplands have cleared.
What this means for you
Valley air pools and lags, so the local experience of a front can arrive later and feel heavier than the regional forecast implies. Comparing a barometric pressure forecast with what the valley actually does is worth a few weeks of notes.