It seems that Smolensk has no ICAO code but only an IATA one.
No METAR or TAF is available except a report called synop with a special coding. The WMO ID of Smolensk is 26781 and the only informations that I could find are below:
SYNOPS from 26781, Smolensk (Russia)
SI 10/04/2010 09:00-> AAXX 10091 26781 41396 80904 10027 20022 39956 40253 54000 71042 886//
333 88707=
SM 10/04/2010 06:00-> AAXX 10061 26781 31/93 91403 10009 20009 39956 40255 53003 74540
333 20005=
SI 10/04/2010 03:00-> AAXX 10031 26781 41996 01102 10005 21006 39953 40253 54000 71000
333 55074=
SM 10/04/2010 00:00-> AAXX 10001 26781 42997 01402 10030 21005 39953 40250 54000=
SI 09/04/2010 21:00-> AAXX 09211 26781 42997 71402 10061 21005 39953 40247 53003 87030=
SM 09/04/2010 18:00-> AAXX 09181 26781 32997 01102 10092 20002 39950 40241 54000
333 10160=
SI 09/04/2010 15:00-> AAXX 09151 26781 42597 31304 10141 21002 39950 40235 57015 83200=
SM 09/04/2010 12:00-> AAXX 09121 26781 42597 31103 10139 20029 39965 40250 57012 83200=
Sources : Ogimet.com// or
metaf2xml: parse and decode METAR, TAF, and SYNOP and store as XML for a decoding.
or :
Meteorological Resources - SYNOP
Still trying to decipher...