It sounded as if the Streets were running — Tornado

It sounded as if the Air were running 1
And then the Air stood still.
Eclipse was all we could see at the Window
And Awe-was all we could feel-
By and by the boldest stole out of his Covert 5
To see if Time were there-
Nature was in her Beryl Apron
Mixing fresher Air-
(F.1454/J.1397)
[1, 2] It, Air stood still:: a tornado, twister, that can stand still in a place.
[3] Eclipse:: sky darkened by the tornado.
[5] stole, Covert:: plant, vesture being removed from the ground.
[6] Time:: life of the plant.
[7] Beryl Apron:: shape and color of the tornado.
[8] Mixing:: the movement of the wind.