Why Weather Models Sometimes Wrong?

Posted by on Saturday, December 17, 2016
A prognostic chart of the North American continent provides geopotential heights, temperatures, and wind velocities at regular intervals. The values are taken at the altitude corresponding to the 850-millibar pressure surface.

Whenever a storm is on the way we always talk about models. But what are models and how do they work?

A weather model is a computer algorithm which predicts the weather.

The biggest reason that models can be so inaccurate is because of their computing power. Another reason is the availability of data to input to the models to begin with. Also, models seem to have bias with regards to certain weather systems.

Models are routinely enriched to increase accuracy.

In actual fact, the European ECMWF model is more accurate than the Canadian GEM and American GFS models.



The Team

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