3. Flight Service Station (FSS)
NOTE: The FSS system has recently been consolidated into
approximately one facility per state. Regional FSS denoted on
FLIP High Altitude Charts with a shadow box.
a. Operated by FAAcall name example: San Angelo Radio
b. Provides en route weather information as part of its service
NOTE: FSS operators can read METARs, Area and Terminal
Aerodrome Forecasts, PIREPs, AIRMETs and SIGMETs, but
they are not trained forecasters.
FSS available frequencies are 255.4, 122.2, selected discrete
frequencies and emergency 243.0 and 121.5
NOTE: When calling Metro, Flight Watch, or FSS, advise the
service of your approximate location to receive transmissions
from the proper remote transmitter. At the completion of the
dialogue, the service often appreciates a PIREP including
aircraft type, altitude/flight level, and conditions of flight.
4. Air Route Traffic Control Center (ARTCC)
a. Can provide weather information and updating as requested,
b. Can provide real-time weather avoidance assistance through
use of current ATC radar and weather radar
NOTE: ARTCC will not routinely provide updated weather
briefings for route, as provided by Metro and Flight Watch.
5. Transcribed Weather Broadcasts (TWEB)
a. Recorded weather information transmitted over selected NDB
and VOR stations
b. Amount and type of weather information vary from station to
station, but can include local weather, route weather, winds
aloft, and terminal aerodrome forecasts
6. Hazardous In-flight Weather Advisory Service (HIWAS)
a. Broadcasts continuously over selected VOR stations
b. Contains summary of any AIRMETs, SIGMETs, convective
SIGMETs, CWAs and PIREPs