Winds Aloft
If this report doesn't appear current, check at the source links.
9900 means light and variable. Otherwise ddnn → dd0 → degrees azimuth and nn is speed in knots.
Vancouver (last aquired from flightplanning.navcanada.ca Sunday, Sep 07, 2008 3:05PM)
Vancouver BCfor use 30006000ft9000ft12000ft18000ft
071200 DATA VALID 07180017-21YVR10070309+080212+033621+013519-09
071200 DATA VALID 08000021-06YVR32060908+110410+053617+023319-09
071200 DATA VALID 08120006-17YVR99001506+113005+063112+013024-09
Seattle (last aquired from aviationweather.gov Sun Sep 7 15:05:04 PDT 2008)
  Ft3000600090001200018000
Data updated: 07 Sep 1359 UTC
VALID 071800Z
17-21. SEA03110206+100111+063522+033519-11
Data updated: 07 Sep 1359 UTC
VALID 080000Z
21-06. SEA03080908+110311+073614+032909-10
Data updated: 07 Sep 1359 UTC
VALID 081200Z
06-17 SEA05080907+110405+069900+022607-10