NWS SYNOPTIC CODES

SYMBOL WW= PRESENT WEATHER


(click on any symbol to view its definition)

ww	0	1	2	3	4	5	6	7	8	9
0
1
2
3
4
5
6
7
8
9

General Description of each Code Group

00-49: No precipitation at the station at the time of observation

00-19: No precipitation, fog, ice fog (except for 11 and 12), dust storm, drifting or
blowing snow at the station at the time of observation or (except for 09 and 17) during the
preceding hour

20-29: Precipitation, fog, ice fog, or thunderstorm at the station during the preceding
hour but not at the time of observation

30-39: Dust storm, sandstorm, drifting or blowing snow

40-49: Fog or ice at the time of observation (visibility less than 1,100 yd)

50-99: Precipitation at the station at the time of observation

60-69: Rain

70-79: Solid precipitation not in showers

80-99: Showery precipitation, or precipitation with current or recent thunderstorm