The phrase "a set of forecasts" is correct and usable in written English.
You can use it when referring to multiple predictions or estimates about future events, typically in contexts like business, weather, or economics.
Example: "The meteorologist presented a set of forecasts for the upcoming week, detailing expected temperatures and precipitation levels."
Alternatives: "a collection of predictions" or "a series of projections".
Now, instead of making a single, best-guess, forecast, a set of forecasts are made for the weather next week.
This is what is often referred to as "seamless forecasting" where we make use of a set of forecasts for different time ranges.
And each December, he comes to New York, hosts a dinner and delivers a set of forecasts for the coming year.
The SubX dataset provides similar variables to the S2S Dataset, including a set of forecasts for past dates (also called reforecasts), and is being made available for the research community in the Data Library.
The US Geological Survey used the AGU meeting to release a set of forecasts for the afterslip that different areas of the Napa Valley could expect in the next three years.
By the way, "ensemble" forecasting means trying to use a "set" of forecasts to represent the uncertainty in initial conditions, model physics, and so forth rather than a single forecast.
In particular, the Procrustes methodology is used to generate mean forecast precipitation fields from a set of ensemble forecasts.
Climate forecasting uses the ensemble method, where a set of independent forecasts with slightly different initial conditions is generated using either one or several (in the multi-model approach) dynamical forecast systems.
The Fed asks for a set of liquidity forecasts, and a bank offers a blithe assumption that it has enough money on hand to prepare for the worst.
For example, Microsoft embraced the use a set of rolling forecasts as it pursued opportunities to grow its commercial cloud business.
The Fed also released a set of economic forecasts by 17 senior officials, only some of whom vote on monetary policy, showing that their expectations for domestic economic growth for this year have increased modestly since January.
