Sunny 68 New York City and Philly    Dry but Chilly Boston, Showers in ChicagoAbove than average temperatures across West and Central U.S; GreatLakes experience below average temperatures mid-week.A quieter than normal period of weather is underway across the CONUS andis forecast to continue until Thursday. Tonight, scattered showers andthunderstorms will develop along a pair of cold fronts propagating throughthe Northern/Central Plains and Upper Midwest. Some rain showers may alsooccur along the SoCal coast as well. More scattered to isolated rainshowers and thunderstorms will spread into the Southern Plains, LowerMississippi Valley, Midwest and Great Lakes on Tuesday. Two low pressuresystems will consolidate and spread showers and thunderstorms across theNortheast and Mid-Atlantic on Wednesday. Storms are also forecast todevelop over parts of the Southern Plains and Lower Mississippi ValleyWednesday and continue into that evening.An amplifying pattern over the eastern Pacific and Western CONUS willinfluence temperatures over the next couple of days. Strong southerly flowinto the West/Southwest will support above average temperatures throughWednesday. Temperatures will be above average over the High Plains as wellduring this period. An upper trough moving through the Great Lakes onWednesday will support below average temperatures into the Northeastthrough Thursday.