background image

AIM 

6/17/21 

users. FIG 7

1

1 provides conversion tables for the 

most used weather elements that will be encountered 
by pilots. 

7

1

2.  FAA Weather Services 

a. 

The FAA provides the Flight Service program, 

which serves the weather needs of pilots through its 
flight service stations (FSS) (both government and 
contract via 1-800-WX-BRIEF) and via the Internet, 
through Leidos Flight Service. 

b. 

The FAA maintains an extensive surface 

weather observing program. Airport observations 
(METAR and SPECI) in the U.S. are provided by 
automated observing systems. Various levels of 
human oversight of the METAR and SPECI reports 
and augmentation may be provided at select larger 
airports by either government or contract personnel 
qualified to report specified weather elements that 
cannot be detected by the automated observing 
system. 

c.  Other Sources of Weather Information 

1. 

Weather and aeronautical information are 

available from numerous private industry sources on 
an individual or contract pay basis. Prior to every 
flight, pilots should gather all information vital to the 
nature of the flight. Pilots can receive a regulatory 
compliant briefing without contacting Flight Service. 
Pilots are encouraged to use automated resources and 
review AC 91

92, Pilot’s Guide to a Preflight 

Briefing, for more information. 

2. 

Pilots can access Leidos Flight Services via 

the Internet at http://www.1800wxbrief.com. Pilots 
can receive preflight weather data and file VFR and 
IFR flight plans. 

7

1

3.  Use of Aviation Weather Products 

a. 

Air carriers and operators certificated under the 

provisions of 14 CFR Part 119 are required to use the 

aeronautical weather information systems defined in 
the Operations Specifications issued to that certifi-
cate holder by the FAA. These systems may utilize 
basic FAA/National Weather Service (NWS) weather 
services, contractor

 or operator

proprietary weath-

er services and/or Enhanced Weather Information 
System (EWINS) when approved in the Operations 
Specifications. As an integral part of this system 
approval, the procedures for collecting, producing 
and disseminating aeronautical weather information, 
as well as the crew member and dispatcher training to 
support the use of system weather products, must be 
accepted or approved. 

b. 

Operators not certificated under the provisions 

of 14 CFR Part 119 are encouraged to use FAA/NWS 
products through Flight Service Stations, Leidos 
Flight Service, and/or Flight Information Services

 

Broadcast (FIS

B). 

c. 

The suite of available aviation weather product 

types is expanding, with the development of new 
sensor systems, algorithms and forecast models. The 
FAA and NWS, supported by various weather 
research laboratories and corporations under contract 
to the Government, develop and implement new 
aviation weather product types. The FAA’s NextGen 
Aviation Weather Research Program (AWRP) 
facilitates collaboration between the NWS, the FAA, 
and various industry and research representatives. 
This collaboration ensures that user needs and 
technical readiness requirements are met before 
experimental products mature to operational applica-
tion. 

d. 

The AWRP manages the transfer of aviation 

weather R&D to operational use through technical 
review panels and conducting safety assessments to 
ensure that newly developed aviation weather 
products meet regulatory requirements and enhance 
safety. 

7

1

Meteorology