Final answer:
An optimal forecast is the best forecast available made using all relevant information, aiming to predict future events with accuracy. It utilizes modern data sources and forecasting methods, as seen with weather predictions from NOAA and space weather alerts.
Step-by-step explanation:
The best forecast available which is based on all the relevant information is called an optimal forecast. This type of forecast employs various methods and utilizes current and comprehensive data to predict future events as accurately as possible. For example, in the context of weather predictions, modern-day forecasts for space weather provide outlooks up to a week ahead, and they can issue bulletins and warnings for upcoming events that might interest or impact the public.
With the advancement of technology, sources of data have diversified and forecasting methods have improved significantly. Today, farmers might use forecasts from the National Oceanic and Atmospheric Administration (NOAA) instead of traditional sources like the Farmer's Almanac to make crucial decisions about when to plant and harvest crops. Similarly, in the field of solar weather forecasting, there is a hope that the predictive capabilities will improve, although the challenge remains in predicting rare and extreme events.