Approach plates marked with a snowflake symbol ( ) indicate that altitude corrections are necessary for specific approach segments when the outside air temperature is below the listed temperatures.
The Cold Temperature Restricted Airports document, which lists affected airports, is available in ForeFlight under Documents > FAA > Winter Operations > Cold Temperature Restricted Airport.
Once downloaded, this document is updated automatically with each data cycle and includes a temperature and altitude correction table for reference.
Expanded Cold Temperature Restricted Altitude Correction Table
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