What forecasts does TheWeatherOutlook issue? A wide range of forecasts are issued including: Icon forecasts - up to 16 days aheadThese update several times each day and use data from high resolution global computer forecasting models.Icon forecasts - up to 28 days aheadThese suggest the most likely average weather conditions for a particular day between 16 and 28 days ahead. The data is statistically produced.Discussion ForecastsThese are produced manually by a forecaster, and give a more in-depth view of likely weather conditions. Forecasts for 14, 45 and 90 days ahead are issued regularly.