Chapter 9. FAA Weather Services
Section 1. General
Surface meteorological observations are filed at
scheduled and unscheduled intervals with stations
having sending capability to WMSCR for
dissemination on the Service A domestic aviation
weather system. These reports are aviation routine
weather reports (METAR) and aviation selected
special weather reports (SPECI). All reports must
include a report type and the sixdigit time of the
observation. Computer sorting and validation
requires exact adherence to format and procedure at
9-1-2. SCHEDULED TRANSMISSION
a. METAR REPORTS. Transmit METAR
between H+55 and H+00.
b. SPECI AND DELAYED OR CORRECTED
REPORTS. Transmit SPECI, delayed or corrected
reports as soon as possible after H+00.
Most meteorological and NOTAM data exchanged
outside of the facility is dependent on WMSCR. It is
important to follow strict format and procedures
during normal operations, as well as during system
a. Circuit interruption. Notify WMSCR and/or
NADIN and the appropriate Telco servicing company
and/or technical help desk.
b. Record the circuit and/or equipment identification numbers in all outage reports. Facilities should
obtain and record ticket numbers provided by the
Telco authority and/or technical help desk.
c. WMSCR telephone numbers:
Salt Lake City 8013202046