The U.S Department of Transportation’s Federal Aviation Administration (FAA) proposes an $869,125 civil penalty against Compass Airlines, LLC, of St. Louis, Mo., for allegedly failing to provide flight crews with complete weather information.

The FAA alleges the company, which does business as Delta Connection, operated 47 flights between May 18, 2015 and June 19, 2015 without correctly using an approved system for obtaining weather forecasts and reports of adverse weather.

Compass flew to and from Monterrey, Mexico, without the required Mexican Significant Meteorological Information in its flight weather packages, the agency alleges.

“It is imperative that all operators have complete and accurate weather information,” said FAA Administrator Michael Huerta. “That ensures they’re aware of potentially dangerous clear air turbulence, thunderstorms and low-altitude wind shear, all of which could affect the safety of flight.”

The FAA further alleges that Compass did not notify its operations personnel about potentially hazardous meteorological conditions.

Compass has 30 days from receiving the FAA’s civil penalty letter to respond to the agency.