dan shenman, nbc news. >>> bill karins is here track ing some storms as we start the week. >> active weather in areas of kansas and heading through areas of illinois. hroughout the day, the cold front will sag to the south. 4 million people are at risk. maybe an isolated tornado. tomorrow is is a worse day as a matter of fact the storms will be and the risk is a little higher. we have an area that's ak. enhanced ris so two day of severe weather .isk it's a a look at the big weather story of the day. now he's closelook at your day aadd. pnchts. >> the rain and thunderskerms could maheir way to indianapolis and columbus. new england it was a cold, chilly sunday. waking up to chilly ymperatures toto. some areas only in the 40s and 50s for highs. >> the week ead forecast, we have a snow forecast in the rockies and northern plains. not done yet. >> april, thank you. >>> it's the bigst box office opening ever. avensers debuted with the staggering $1.2 billion globally. it's the first film ever to soar past $1 billion in its debut. muovie goers turned out in drovs with u.s. and canadian the