Originating airport name, TAF validity period, wind direction/speed/gust, visibility, weather, cloud, icing, turbulence, significant change of weather elements, maximum and minimum temperature.

Visibility : 9999 = 10 km or above, 7000 = 7 km, 0000= less than 50 m
              CAVOK = sky and visibility OK

Weather : - = light, + = heavy, VC = vicinity, MI = shallow, BC = patches,
              SH = showers, PR = partial, TS = thunder storms,
              DZ = drizzle, RA = rain, BR = mist, FG = fog, HZ = haze,
              +SHRA = heavy showers of rain
              -DZ = light drizzle

Cloud : cloud amount given in eighths of sky (oktas) covered where
            FEW = 1 to 2 oktas, SCT = 3 to 4 oktas, BKN = 5 to 7 oktas,
            OVC = 8 oktas and SKC = sky clear

Significant change : BECMG = becoming, TEMPO = temporarily

When forecast temperatures are included in accordance with regional air navigation agreement, the maximum and minimum temperatures expected to occur during the period of validity of the aerodrome forecast should be given, together with their corresponding times of occurrence.

An amended forecast may be issued subject to certain criteria and is prefixed by the keyword TAF AMD.

Example :

TAF VHHH 160400Z 160606 13018KT 9000 BKN020 BECMG 0608
SCT015CB BKN020 TEMPO 0812 17025G40KT 1000 TSRA SCT010CB
BKN020 FM1200 15015KT 9999 NSW BKN020 BKN100 TN26/22Z TX30/06Z=

Decoded as :
 

CODE	MEANING
TAF VHHH	TAF issued by the Hong Kong International Airport
160400Z	on the 16th of the month at 0400 UTC
160606	valid from 0600 UTC to 0600 UTC the next day
13018KT	surface wind direction 130 degree (east-southeasterly winds); wind speed 18 knots
9000	visibility 9 km
BKN020	broken cloud at 2000 feet
BECMG 0608 SCT015CB BKN020	becoming between 0600 UTC to 0800 UTC, scattered cloud at 1500 feet including cumulonimbus cloud and broken cloud at 2000 feet
TEMPO 0812 17025G40KT 1000 TSRA SCT010CB BKN020	temporarily between 0800 UTC and 1200 UTC surface wind direction 170 degree (south-southeasterly winds); wind speed 25 knots gusting to 40 knots; visibility 1000 m in thunderstorm with moderate rain; scattered cloud at 1000 feet including cumulonimbus cloud and broken cloud at 2000 feet
FM1200 15015KT 9999 NSW BKN020 BKN100	from 1200 UTC surface wind direction 150 degree (south-southeasterly winds); wind speed 15 knots; visibility 10 km or above; nil significant weather; broken cloud at 2000 feet and broken cloud at 10000 feet
TN26/22Z	minimum temperature 26 oC occurred around 2200 UTC
TX30/06Z	maximum temperature 30 oC occurred around 0600 UTC