I got this notam from duats

!HPN 01/087 HPN 11/29 PTCHY THN SIR SWEPT WEF 0501301139

and couldn't figure out what SWEPT meant, so I tried the translator
feature. Seems the translator didn't know either:

White Plains NY (Westchester County) [HPN]: January NOTAM #87:
Runway 11/29 patchy thin snow and ice on runway SWEPT effective from
January 30th, 2005 at 06:39 AM EST (0501301139)

Am I supposed to believe they've got guys out on the runways with brooms
sweeping the snow off, or what?