Terminal Aerodrome Forecasts (TAFs) state expected meteorological conditions within a 5 SM radius from the center of an airport's runway complex. They are issued four times daily at 0000z, 0600z, 1200z, and 1800z. TAFs utilize the same code as METARS in the following format: Type of report: Routine (TAF) and Amended (TAF AMD); 4-letter station identifier; Date and time of origin (Valid time, TEMPOs, and PROBs are presented in ddhh/ddhh, FROM groups are presented ddhhmm; Valid period date and time (2-digit date followed by the 2-digit beginning and 2-digit ending hours in UTC); Forecasts (wind, visibility, significant weather, sky condition, non-convective low-level wind shear, change indicators, probability).

Example (See picture above)

TAF indicates that the following is a terminal aerodrome forecast.

KXYZ indicates the airport to which the forecast applies (ICAO airport code).

051730Z indicates that the report was issued on the 5th of the month at 1730 UTC (also known as Zulu, hence the Z).

0518/0624 indicates that the report is valid from the 5th at 1800 UTC until the 6th at 2400 UTC.The remainder of the first line contain the initial forecast conditions.

31008KT indicates that the wind will be from 310° true at 8 knots (9 mph; 4 m/s).

3SM -SHRA BKN020 indicates that visibility will be 3 statute miles (5 km) in light (-) showers (SH) of rain (RA), with a broken ceiling (between 5/8  and 7/8 of the sky covered) at 2,000 feet above ground level (AGL).

(Each line beginning with FM indicates a rapid change in the weather over a period of less than an hour.)

FM052300 indicates the next period lasts from the 5th at 2300 UTC to the 6th at 0600 UTC (the effective time on the next FM line). 

30006KT indicates wind from 300° at 6 knots.

5SM indicates visibility of 5 statute miles.

-SHRA indicates light rain showers.

OVC030 indicates sky overcast at 3,000 feet.

PROB30 0604 / 0606 indicates a 30% probability of the following temporary conditions on the 6th between 0400 UTC and 0600 UTC:

VRB20G35KT indicates wind of variable direction at 20 knots with gusts up to 35 knots.

1SM indicates visibility of 1 statute mile.

TSRA indicates thunderstorms and rain.

BKN015CB indicates broken cumulonimbus clouds at 1,500 feet.

FM060600 indicates that the next period lasts from the 6th at 0600 UTC until 2400 UTC (the end of the forecast period, as there is no following FM). 

25010KT indicates wind from 250° at 10 knots.

4SM indicates visibility of 4 miles.

-SHRA indicates light rain showers.

OVC050 indicates sky overcast at 5,000 feet.

TEMPO means that these conditions are temporarily replaced on the 6th between 0800 UTC and 1100 UTC with: 

2SM indicates visibility of 2 miles.

-SHRA indicates light rain showers.

OVC030 indicates overcast sky at 3,000 feet (the wind speed remains the same as it is not mentioned).

RMK NXT FCST BY 00Z indicates a remark that the next forecast will be issued by 0000 UTC.

= indicates the end of the forecast.