A METAR describes the current weather conditions, a Terminal Aerodrome Forecast (TAF) message contains forecast information. Many of the elements are similar to those used in METAR. An example of a TAF message:
LOWW 011400Z 011524 31008KT 9999 FEW040 BKN060 TX16/15Z TN10/24Z TEMPO 1521 32013KT -SHRA BKN045 PROB30 TEMPO 1520 31015G25KT 6000 SHRA BKN040 FEW045TCU BECMG 2324 CAVOK
The first two groups (LOWW 01140Z) are identical to METAR groups: location identifier and issuing day and time. The third group (011524) tells the period for which the forecast is given. The first two numbers denote day of month. The next four numbers give the validity hours. In this example, the forecast is valid from 15:00 to 24:00. After these code groups, a description of the forecast weather phenomena follows.