reporter: dr. greenblatt told me today none of the vaccinated covid patients he s seen here had had a booster. he also says the patients he s seeing now are younger than they were a year ago. norah. o donnell: nikki battiste, thank you. turning now to the weather. there s snow in the midwest, a tornado threat in the south, the and it s supposed to feel like spring in the east tomorrow. cbs lonnie quinn joins us. hey, lonnie. good toy see you. what s going on? norah, when you have all these different air masses out there, when they clash you get the possibility for dangerous weather, and that s what we re dealing with. let s go to the maps as of right now. i mean, take a look at the record heat that was established today in memphis, tennessee, oklahoma city. you were almost 80 degrees outside. but on the other side of that front, minneapolis maxed out at 30 degrees, picking up all kinds of snow, probably a half a foot of snow will fall for minneapolis. and that storm right there