Talk about being a wee bit off.
According to the CNBC report at the link below, the CDC was projecting a "surge" of COVID-19 cases in the United States in May 2021 before declining in the summer. The reality was very different, as shown in the data table below from the CDC's own COVID tracker website (https://covid.cdc.gov/covid-data-tracker/#trends_dailytrendscases). Instead of rising, cases fell by 65%.
Either the CDC was purposely lying to try to keep people wearing masks and staying apart or they simply can't predict the future and should not try. In either case, being this far off doesn't exactly give me a lot of confidence in anything they say.