Clouds roll in fore tonight  but most of the rain showers stay to our south across northern Illinois. You folks in Kenosha County could see a pop up shower, but the chance is still pretty small.

Wednesday will carry the best chance to see more widespread rain showers as colder air wraps around this huge area of low pressure.  Temperatures will be colder, in the middle 60s, and slightly cooler along Lake Michigan as a lake breeze sets up.  Rain totals through Thursday morning will be between a quarter of an inch and a half inch before skies start clearing Thursday afternoon.  It will be windy and colder with highs only in the upper 50s.

Friday will be cool for May with highs struggling to even reach 60 degrees but at least it will be mostly sunny.  We only warm up slightly on Saturday and the cloud cover will be increasing throughout the day ahead of our next weather-maker.  Slightly more unsettled weather moves into the forecast for Sunday and Monday of Memorial Day weekend with scattered chances of rain and thunderstorms.

          The tornado that hit Moore, Oklahoma on Monday has now been classified as an EF5 tornado with wind speeds up to 210 miles per hour. The city of Moore is just south of Oklahoma City, both located  in what is called tornado alley which is a geographic area of the greatest density of tornado formation and occurrence in this country. For example, Moore has experience twenty tornadoes in and about the city limits in the past one hundred and twenty years.

            In the past fifteen years large tornadoes have been more frequent, and in all five tornadoes have struck Moore since 1998. The two strongest and most deadly and damaging tornadoes were the EF5 twisters in 1999 and 2013, and both occurred in May. The tornadoes that struck in 2003 and 2010 also occurred in May and were strong EF3 and a weaker EF4 tornado. The tornado in October of 1998 was a strong EF2.