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Online Resources
Below is a list of online resources available in the Weather Information category. The FAA is not responsible for the contents of the non-government sites listed. The list is provided only as a convenience to the users of this site. Click here to return to the category list

AC 00-45F - Aviation Weather Services
This link goes to the PDF version of the new Aviation Weather Services advisory circular.
http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/2FDBB0759757C5158625738B007442E7?OpenDocument
AOPA Skyspotter Course
This link goes to AOPA/ASF's interactive online course on making pilot reports (PIREPs).
http://www.aopa.org/asf/online_courses/skyspotter/
Aviation Digital Data Service (ADDS)
The Aviation Digital Data Service (ADDS) makes available to the aviation community text, digital and graphical forecasts, analyses, and observations of aviation-related weather variables.
http://adds.aviationweather.noaa.gov
Aviation Weather Information (NASA)
The goal of the NASA/FAA AWIN program is to provide improved weather information (not simply data) to users in the National Airspace System, and to foster the improved use of this information.
http://awin.larc.nasa.gov/
Datalink (AOPA Air Safety Foundation)
This link goes to the AOPA Air Safety Foundation's free online datalink mini-course.
http://flash.aopa.org/asf/datalink/
DUAT (DTC)
The FAA's Direct User Access Terminal (DUAT) service provides direct access to weather briefing, flight planning, and flight plan filing information. It is free to qualified pilots.
https://www.duat.com/
DUATS (CSC)
The FAA's Direct User Access Terminal (DUAT) service provides direct access to weather briefing, flight planning, and flight plan filing information. It is free to qualified pilots.
http://www.duats.com
Hazardous Mountain Winds (FAA)
This advisory circular contains information on hazardous mountain winds and their effect on flight operations.
http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/780437D88CBDAFD086256A94006FD5B8?OpenDocument
Icing Conditions (FAA)
This advisory circular provides information about safe flight in icing conditions.
http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/4f211dd2f5233b5686256c9b0056f7a0/$FILE/AC91-74.pdf
Icing Training (NASA)
This link goes to two NASA courses for pilots on icing.
http://aircrafticing.grc.nasa.gov/courses.html
IFR - single pilot course
This link goes to AOPA/ASF's interactive online course on smart, safe, and successful single pilot IFR.
http://www.aopa.org/asf/online_courses/single_pilot_ifr/
IFR Adventure course
The AOPA/ASF "IFR Adventure: Rules to Live By" course uses a trip scenario to teach regulations relevant to instrument flight.
http://www.aopa.org/asf/online_courses/ifradventure/
National Center for Atmospheric Research
This site is maintained by the University Corporation for Atmospheric Research.
http://www.rap.ucar.edu/weather/
National Climatic Data Center
The National Climatic Data Center (NCDC) is the world's largest active archive of weather data.
http://lwf.ncdc.noaa.gov/oa/ncdc.html
Safety Advisors Publications (AOPA/ASF)
This link goes to the AOPA Air Safety Foundation's Safety Advisors, which describe aviation specific topics in areas such as weather, operations, and proficiency.
http://www.aopa.org/asf/publications/advisors.html
Skyvector
This site provides online VFR chart depictions and weather information.
http://www.skyvector.com
Thunderstorms and ATC
This link goes to the AOPA Air Safety Foundation's online "mini-course" on avoiding thunderstorms.
http://flash.aopa.org/asf/wxwise%5Fthunder/
Weather Decision-Making for GA Pilots
This link goes to a weather decision-making guide for general aviation pilots.
http://www.faa.gov/pilots/safety/media/ga_weather_decision_making.pdf
Weather Decision-Making Guide (Online Version)
This site is an online version of the GA Pilot's Weather Decision-Making Guide.
http://www.hf.faa.gov/WeatherDecisionGuide/default.aspx
Weather Resources Menu (FAA)
This link goes to FAA's weather resources page.
http://www.faa.gov/airports_airtraffic/weather/
WeatherWise - Ceilings and Visibility
This link goes to the Air Safety Foundation's interactive online course about ceilings and visibility.
http://flash.aopa.org/asf/wxwise_ceilingvis/