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How do you read/decode METARs? Let’s break down METARs into their individual components. Here is an example METAR and TAF from Salem, OR (KSLE). The top line is the METAR and the bottom six lines are the TAFs. As you can see it’s not such a great day today!
METAR/TAF LIST OF ABBREVIATIONS AND ACRONYMS. indicator that visual range data follows; separator between temperature and dew point data. All dates and using times -hour a 24 in clock; -digit UTC two date -digit always appended Z to indicate with UTC. Fully automated report, no human-on.
How to Decode METAR, TAF, and pilot reports. A METAR is a codified observation message indicating an airfield weather conditions observed at a given time. Such a message is established every hour. A SPECI message is identical to a METAR but is established punctually instead of regularly.
How Do You Decode a METAR? Instead of looking at a METAR as a whole, it is better to learn how to read a METAR by breaking it into little ‘chunks’. After all, this is precisely what a METAR is.
Your captain is reading an aviation weather report, called a METAR. The METAR was either uplinked to your plane's computers through a system called ACARS (essentially an aviation text-messaging system) or through an advanced weather app that pilots can access through company-issued tablet computers that connect to the aircraft's WiFi system.
To decode a METAR (Meteorological Aerodrome Report), follow these steps: Identify the type of report (i.e., “METAR” or “SPECI”). Note the airport’s ICAO code.
Temperature and dew point are always stated in degrees Celsius in a METAR or TAF. 02/M01 means that the temperature is 2 °C and the dew point is -1 °C. Negative numbers are preceded by an M. Pressure . In the METAR you will also find the air pressure at the mean sea level (QNH).
Aviators use METAR reports to understand weather conditions at a glance. Here's your guide to decoding a METAR like a pro.
Also, at selected stations, the 9 character code (T01760158) breaks down the temperature and dew point to the nearest 1/10th of a degree Celsius. The “T” stands for temperature and the “0” means positive temperature. A “1” in place of the “0” stands for negative temperature.
1. Type of report (METAR) The first code to look for should be the identifier for the report. In our example, the report is clearly identified by the METAR term. In the absence of any identified, you can also assume that a weather report is transmitted in the METAR format.