Final answer:
The abbreviation 2518+06 in a Winds Aloft Forecast indicates a wind direction of 250 degrees, a wind speed of 18 knots, and a temperature of +6 degrees Celsius at the specified altitude.
Step-by-step explanation:
The abbreviation 2518+06 on a printed Winds Aloft Forecast represents a specific wind direction and speed, along with the temperature at a particular altitude.
The first two digits (25) indicate the wind direction to the nearest 10 degrees from true north. In this case, the wind is coming from 250 degrees. The next two digits (18) represent the wind speed in knots, so the wind speed is 18 knots. The symbol '+' indicates that the temperature is above zero, and the last two digits (06) specify the temperature in Celsius degrees at that altitude, which is +6 degrees Celsius.