Keywords: Symbol code ww 21.svg Codes 20-29 General Group Precipitation fog ice fog or thunderstorm at the station during the preceeding hour but not at the time of observation <br />Code 21 <br />Rain not freezing not falling as shower s ended in the past hour according to http //www srh weather gov/srh/jetstream/synoptic/ww_symbols htm US National Weather Service - Southern Region Headquarters 2009-05-17 w cs User -xfi- PD-USGov-NOAA Image Symbol code ww 20 svg Image Symbol code ww 21 svg Image Symbol code ww 22 svg Image Symbol code ww 23 svg Image Symbol code ww 24 svg Image Symbol code ww 25 svg Image Symbol code ww 26 svg Image Symbol code ww 27 svg Image Symbol code ww 28 svg Image Symbol code ww 29 svg Weather map symbols |