The sky over Tampa Bay, drawn as terrain; the weather over the country, drawn as isobars. Every hour the page takes sea-level pressure at three hundred points — the bay, the Gulf and Florida, the whole country — and draws it as lines every 2 hPa (4 from a distance), registered to the map: a low crossing the state reads as rings. The field holds still and steps on the hour. Every ten minutes it also samples cloud cover, wind, and rain at thirty-five points across the bay; cloud masses rise into a faint relief. The red crosshair is the University of Tampa; the gold line is the edge of the bay. Your cursor is a light — hold it still and it burns through the cloud to clear sky; pass it over a station to read it. Drag to move, scroll to zoom, out as far as the whole country; the diamond brings you home.