Tuesday, March 9, 2010

A Tale of Two Lows.

The temperature reached 50 degrees at the Rockford Airport this afternoon for the first time since December 1, 2009 when it was 56 degrees. Showers are rotating around a large low pressure area centered over northeastern Kansas tonight. The whole area is moving toward the northeast, and bands of showers will move across the Stateline from the south. As the system moves slowly northward, a warm front will push across the Stateline into southern Wisconsin. Temperatures will rise into the middle 50's northward to the Wisconsin stateline, and may even approach 60 degrees in the afternoon in southern Lee and DeKalb counties. Showers wiill continue through the morning hours on Wednesday and then diminish to drizzle in the afternoon. A new and stronger storm system will develop over southeastern Kansas on Wednesday night moving to northwestern Missouri by Thursday morning. It will draw lots of moisture northward out of the Gulf of Mexico. The air may be unstable enough for a couple of thunderstorms to push through the Stateline in the morning. Wednesday night through Thursday morning is the period most likely to produce moderate and possibly heavy rainfall across northern Illinois. There may be enough rainfall this week to cause sufficient rises on the Rock River, and it's tributaries to reach or exceed bankful causing localized flooding.
by Meteorologist
Eric Nefstead

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