"Weather map" . "synoptic weather chart" . . . . . "surface synoptic data" . . . "synoptic charts" . "Weather Maps" . "weather chart" . "upper-air chart" . "map" . "weather map" . . . . . . "850 mb pressure surface" . "weather maps" . . "Weather map" . . "weather charts" . . "sypnotic data" . .