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GRIB 1 (WAFS) (8.4 Mb four times a day) consisting of
wind, temperature and humidity forecasts for standard
levels, forecast height of tropopause and maximum wind
for T+6 to T+36 using a gridded binary code (WMO FM 92-IX
Ext - GRIB). The forecast is made four times a day from
the aviation run of the Unified Model issued at around
0335 UTC/0935 UTC/1535 UTC/2135 UTC.
OPMET (10 Mb a day) includes METARs, TAFs, SIGMETs,
SPECIs, special AIREPs, ADMIN messages, and Chart AMENDS
and volcanic ash and tropical cyclone advisories.
T.4 charts (32 Mb a day) wind/temperature and SIGWX
T4 charts for the standard ICAO areas as specified in
ANPs, produced by WAFC London, and WAFC Washington. Volcanic
Ash Dispersion advisories in graphical format when available
will be issued on this channel. High level BUFR (SIGWX)
produced by WAFC London (1 Mb a day).
Please note, volumes are approximate.
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