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Data are UNOFFICIAL.  Data files are ASCII format.  Weather Codes...

1. Fog/Mist/Freezing Fog/Shallow Fog/Patchy Fog; Visibility > 1/4 Mile 
2. Fog/Mist/Freezing Fog/Shallow Fog/Patchy Fog; Visibility < 1/4 Mile 
3. Thunder 
4. 
5. Hail 
6.  
7. 
8. Haze

Note that codes 4, 6 and 7 are currently not used.
Monthly Archived Data Suspended in 2006
1999 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2000 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2001 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2002 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2003 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2004 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2005 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2006 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov