Saturday, January 28, 2012

A Little Snow Overnight... About 1" or so....

A fast moving weather system is approaching from the northern plains this evening.  An impulse crossed northern Illinois around 8 pm causing brief moderate snow.  An upper impulse associated with a Canadian cold front will approach the area later tonight.  A brief period of light to moderate snow will move across the area late tonight bringing around 1" of new snow to northern Illinois. Light snow and flurries will end early Sunday, after the upper disturbance moves off to the east, followed by decreasing clouds. It will be breezy during the mid-day hours, and it will be a little chilly with a high temperature in the upper 20's.  A ridge of high pressure will make for mostly sunny skies and decreasing winds by late afternoon.  The ridge will move to the east of the Stateline by early evening.  It will be mostly clear to start off the night, but clouds will rapidly increase with a warm front approaching from the west.  The warm front will move northeast through northern Illinois by noon time on Monday.  Monday will be mostly cloudy and warmer with a chance of some drizzle in the morning. The high temperature on Monday will be back in the low 40's with a breezy southwesterly wind blowing from 15-25 mph.  Temperatures will be well above average on Monday night with a mild low in the low 30's expected.  On Tuesday the southwesterly breezes will continue, and the temperatures will soar into the upper 40's in the afternoon.  There may be some rain showers in the afternoon with the mild moist air from the southwest pushed upward by a Pacific cool front moving in from the west.  There could be a little rain and snow on Tuesday night after frontal passage.  Wednesday will be partly cloudy and continued mild with a high in the low 40's.  Pacific high pressure centered over the Rockies will ridge eastward into the mid west on Thursday and Friday keeping temperatures mild.  Highs both days will be around 40 degrees.  A disturbance could cause a little light snow on Friday night.  Saturday will be partly cloudy and a little cooler with a high in the middle 30's.

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