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    New TAF code and 30-hour TAF (Table 1)

    Items
    Old
    New
    New TAF code:
    1. Date included before
    hour (with “/” between
    start/end validity
    period)
    2. Temperature group
    positioned at the end
    of main group but
    before any change
    groups
    Example:
    TAF VHHH 242200Z 250024
    14005KT 9999 FEW020
    BECMG 0204 27010KT
    BECMG 0911 14005KT=
    TX32/06Z TN27/22Z=
    Example:
    TAF VHHH 242300Z 2500/2606
    14005KT 9999 FEW020
    TX32/2506Z TN27/2522Z
    BECMG 2502/2504 27010KT
    BECMG 2509/2511 14005KT
    BECMG 2602/2604 27010KT=
    VHHH TAF validity
    24-hour
    30-hour
    Maximum/minimum
    temperature forecast
    One maximum and one minimum temperature forecasts are given.
    One maximum and one minimum temperature forecasts will be given. But if there are two forecast maxima/minima of equal values, the first occurrence time will be given.
    Table 1 Difference between the old and new TAF code.
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