The phrase "authorities predicted" is correct and usable in written English.
It can be used when discussing forecasts or expectations made by official organizations or individuals regarding future events or situations.
Example: "The authorities predicted a significant increase in traffic during the holiday season."
Alternatives: "officials anticipated" or "experts forecasted".
Indian authorities predicted that they would soon catch the rest.
More commonplace jars, vases and tablets will surely make their way toward the market, authorities predicted.
Long before the Expo got under way, Shanghai authorities predicted that it would largely be attended by a domestic audience.
With emergency teams yet to reach coastal villages cut off by floods and landslides, authorities predicted an even higher death toll.
The local authorities predicted to be most affected are concentrated in the east of England, East Midlands and the south-west, where rents have risen rapidly in recent years.
"Who gives Weibo the right to silence its users?" Still, one official of a Chinese Internet-related service, speaking on the condition of anonymity about a matter of deep concern to the authorities, predicted that the notices would have a chilling effect.
Some authorities predict that new guidelines will be set that will strictly limit all partisan gerrymandering.
The authorities predict the event will attract 25m visitors to the United Arab Emirates.
But the authorities predict major gridlock today and tomorrow, as the three-day gathering of world leaders begins in earnest.
The authorities predict a five-month maximum for processing there; applicants then have to apply to the U.S. State Department for the actual visa.
The CSIRO's ultimate goal is to merge ESA with another of its new programs, ERIC Emergency Response Intelligence Capabilityy), which helps authorities predict the longer-term impact of a disaster, through to things like what financial assistance victims may require.
