reporter: david, harris county officials said they managed to administer 5,400 of those doses. and we actually have a striking image of people lined up at rice university where they gave out about 1,000 of those vaccines. and after receiving guidance from moderna, the unused doses, about 3,000 of them, were able to be re-refrigerated to be administered at a later time. david? marcus moore leading us off tonight. marcus, thank you. let s get right to chief meteorologist ginger zee, timing out this next storm for us. hi, ginger. reporter: hi, david. we started this morning breaking all-time cold records from nebraska through arkansas, all the way down to new orleans, where they did, indeed, have their coldest start to mardi gras. let s go ahead and dive in. that colorful map, it s not from a couple days ago. these are new warnings. so, dallas again makes their way into that winter storm warning. anywhere from shreveport up through fayetteville, oklahoma city also in those winter st