Storm behind Chicago’s wind-driven, Wednesday morning rains brings accumulating snow to the Plains and Upper Midwest



Waves of rainfall, riding powerful southerly winds, greet Chicagoans Wednesday morning.  It’s the area’s second significant precipitation-producing system in a week—a storm which generated accumulating snowfall Tuesday in the Plains—snow which continues in sections of Minnesota, northwest Wisconsin and Michigan’s Upper Peninsula Wednesday.




Snow tallies were impressive in sections of South Dakota and southwest Minnesota Tuesday totaling 9.5” at Porcupine, SD; 8.5” Marshall, MN; 8.0” Holland, MN; 7.0” Pine Ridge, South Dakota and 6.0” at Oglala and Manderson—each in South Dakota.



Temps headed decidedly lower later Wednesday; coming nights to host chilly mins in the “20s” inland





Winds shift northwest and temperatures tumble Wednesday afternoon, falling from low and mid 50-degree highs to the low and mid 40s by nightfall. But it’s the nighttime hours which are to host the chilliest readings in the days ahead with mid 20s not out of the question in colder areas away from the city and Lake Michigan even as 30s occur in the city and areas adjacent to Lake Michigan’s low 50-degree waters.




Just 13 minutes of sun Tuesday in a November off to a cloudier than normal start; the upcoming 3 months rank as the city’s cloudiest





Sun’s been in shorter than usual supply as November 2013 has gotten underway. Tuesday saw just 13 minutes of sunlight and the month to date has produced just 32% of its possible sunshine—well short of the November norm of 42%.




This isn’t totally surprising. The three months ahead are typically the Chicago area’s cloudiest of the year with December and January typically recording around 41% and 42% of their possible sunshine.



Big north/south temp spread across Lower 48 next week to keep active pattern going; next significant precip-producer due mid-week





While a few afternoon instability sprinkles may occur as clouds reassemble Thursday with daytime “warming”, the next significant precipitation-bearing system appears a threat by the middle of next week.




Abnormally chilly early season air across southern Canada and the Upper Midwest contrasting sharply with abnormal warmth across the southern Lower 48 keeps an active, storm-carrying jet stream sweeping from west to east across the country. It’s within these strong upper winds that a parade of disturbances are to ride, each a potential moisture-producer.