Monday, September 14, 2015
Another Warm-up on its Way
A persistent southerly wind associated with the eastern edge of a weak lee-side trough will warm up the Midwest from Tuesday through Thursday. Lee-side warming on the eastern part of the Rockie Mountains provides warm air that is advected by swift southerly winds, with warm air penetrating as far as the Canadian prairies. Some cloud cover at night will keep low temperatures in the lower 60's. During the daytime mostly clear skies are anticipated Tuesday and Wednesday as the low pressure system remains somewhat to the west. The passage of the low pressure system over northern Wisconsin early on Thursday may cause increasing cloudiness accompanying possible precipitation. Chances of precipitation are very likely with the passage of the leading edge of the cold front late Thursday night and Friday morning. Slightly cooler air will follow the frontal passage, with Friday high temperatures in the mid-70's. Some chance of precipitation remains until early Saturday, with the possible passage of yet another low pressure center.