An uncommon mid-latitude weather system has made for cooler weather in the Mid-South to end the week. While these systems are no stranger to the area, they certainly aren't as common in the middle of the summer. This system has brought northwest flow, or widespread northwest winds in the mid and upper levels, that help usher in (relatively) cool, dry air. As a result, we have seen near record low temperatures at night and quite comfortable high temperatures during the day.
|850mb pressure pattern, wind, and temps. A strong area of low pressure resides over the western Great Lakes, bringing northwest wind into the Ohio Valley and northerly wind into the Mid-South.|
|By Monday evening, the low in the Great Lakes weakens and moves east, allowing southerly flow over the Plains to re-establish and shift east into the Lower Mississippi Valley. Here comes summer again!|
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