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 Wednesday, Nov 25, 2009 7:35AM)
Vancouver BCfor use 30006000ft9000ft12000ft18000ft
251200 DATA VALID 25180017-21YVR16222030+022242-012347-052458-16
251200 DATA VALID 26000021-06YVR23162231+012239-022258-062472-17
251200 DATA VALID 26120006-17YVR31103107-012009-062133-092259-21
Seattle (last aquired from aviationweather.gov Wed Nov 25 07:35:01 PST 2009)
  Ft3000600090001200018000
Data updated: 25 Nov 1358 UTC
VALID 251800Z
17-21. SEA20282133+062239+012248-032350-16
Data updated: 25 Nov 1358 UTC
VALID 260000Z
21-06. SEA21282233+062237+002343-062466-16
Data updated: 25 Nov 1358 UTC
VALID 261200Z
06-17 SEA23142429+042432-022341-062250-19