Keywords: Symbol code ww 04.svg Codes 00-09 General Group No precipitation fog duststorm sandstorm drifting or blowing snow at the station at the time of observation or except for 09 during the preceeding hour <br />Code 04 <br />Visibility reduced by smoke 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 00 svg image Symbol code ww 01 svg image Symbol code ww 02 svg image Symbol code ww 03 svg image Symbol code ww 04 svg image Symbol code ww 05 svg image Symbol code ww 06 svg image Symbol code ww 07 svg image Symbol code ww 08 svg image Symbol code ww 09 svg Weather map symbols |