★★ Thin new snow clung to the walkway that led from the construction elevator to the top of the tower, and coated the cars down below. In the cross-street shade, some of the windshield ice lasted into midday. A few daffodils were out in the sidewalk planters, and they seemed to be flinching. A bus lumbered right into a curbside puddle, splashing a stroller. A track fire at Columbus Circle had stopped the 1 trains, but the sun up Broadway, on the forced walk, couldn’t help but feel warm. It was no substitute for a genuinely pleasant spring day, though, with more than half of April gone. The afternoon light glowed prettily through new leaves and blossoms, even while bare fingers were going numb.