Thursday, April 19, 2012

Not as Much Rain as Expected

Low pressure sits over southeast Iowa  this evening. A stationary front extends eastward from the low across southern Iowa into Illinois just north of Interstate 80 and off to the east.  Moisture riding up and over the front will  cause more rain showers overnight as the low rides eastward along the front.   There is a slight chance of some rumbles of thunder as the low gets closer to the Stateline. The wind will be easterly to northeast 10 to 15 mph becoming northerly later tonight. Temperatures will be in the middle 40's' , and may rise a degree or two before falling later tonight after the low passes by to the east. Showers will come to an end in most areas around daybreak as the low moves off to the east. It will remain mostly cloudy for most of the day on Friday with a brisk northerly wind at 12-24 mph with gusts to 30 mph. The high will only be in the low 50's.  There will be some sunshine in the afternoon.  High pressure will stretch from a center over James Bay in Canada along the ridge line across northwestern Wisconsin, western Iowa, northwest Kansas to the Texas panhandle.  Northeast breezes east of the ridge will diminish to 5 to 10 mph on Friday night as skies clear.  Patchy frost may develop across parts of the Stateline after midnight as temperatures drop into the low 30's.  It will be mostly sunny on Saturday with some of the early morning frost in spots.  It will be cool Saturday with a high in the middle 50's.  There will be a fresh northeast breeze.  On Sunday a weak trough will move into Minnesota and Iowa bringing  extreme northwestern Illinois a slight chance of showers.  Skies will be partly cloudy in the Greater Rockford area with an afternoon high in the upper 50's.  On Monday a major east coast storm will be spinning southeast of Long Island New York causing heavy rains and coastal flooding.  It is also serving to jam up the weather systems to the west.  So, that ridge of high pressure will still be to our west stretching from Manitoba to Oklahoma.  It will be mostly sunny on Monday with light winds, and an afternoon high back in the low 60's.  The ridge of high pressure will be directly over the area on Tuesday morning.  It will start out sunny, but it will become partly cloudy in the afternoon as systems start to move eastward once again.  A warm front approaching across the northern plains will push across the Stateline on Wednesday.  Temperatures will rise into the low 70's, and there could be some showers and thunderstorms with a cool front moving southeast across the area by the early evening hours.  With the front lying across central Illinois by 6 am Thursday... it will be a little cooler afternoon temperatures back in the 60's.

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