Question

METARs have a four letter identifier. In the U.S. METARs begin with the letter:

Answer 1

METARs in the U.S. begin with the letter K followed by a three-letter code specific to the airport.

Step-by-step explanation:

METARs are aviation weather reports that provide information about current weather conditions at an airport. They have a four-letter identifier called an ICAO code, which is assigned to each airport. In the United States, METARs begin with the letter K followed by a three-letter code specific to the airport. For example, KATL is the METAR code for Hartsfield-Jackson Atlanta International Airport.