sadis-api-user-guide-v1.05.pdf
successful at both WAFCs these features will be identical. 2.3.3. The SIGWX forecasts encompass the air space that lies between FL100 and FL600 and are produced for fixed valid times of 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45 and 48 hours after the time (0000, 0600, 1200, 1800 UTC