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Model Output Statistics (MOS) is a type of statistical post processing, a class of techniques used to improve numerical weather models' ability to forecast by relating model outputs to observational or additional model data.

Ensemble Kernel Density MOS (EKDMOS) Grids are generated twice daily, based on the 0000 and 1200 UTC runs of the NAEFS. To express the probability distribution, grids are produced for a number of percentiles as well as for the mean forecast.

Pilots should use MOS in a similar way they may use a TAF keeping in mind that TAFs are constructed by highly trained meteorologists and will ordinarily be more accurate than a MOS forecast for the same airport.

While TAFs provide the official forecast for 666 airports throughout the US and its territories, MOS provides weather guidance for over 2100 airports including some military air bases.You'll get a refreshed forecast at an airport that will tend to track better with the actual weather than with the area forecast.

The NAM MOS Message (New Format, starting January 2016)DT = The day of the month, denoted by the standard three or four letter abbreviation.HR = Hour of the day in UTC time.N/X = nighttime minimum/daytime maximum surface temperatures.TMP = surface temperature valid at that hour.More items...

While TAFs provide the official forecast for 666 airports throughout the US and its territories, MOS provides weather guidance for over 2100 airports including some military air bases.You'll get a refreshed forecast at an airport that will tend to track better with the actual weather than with the area forecast.

GFS MOS is a suite of text-bulletin and graphical products developed and supported by MDL. Both product types include meteorolgical guidance for a suite of variables (Temperature, Dewpoint, Precipitation Amount, etc.).