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December 8-10, 2018 Winter Storm


Orangeburgwx
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12 minutes ago, Cornsnow said:

When do we start using much shorter range models like the HRRR, RAP and others? I thought lots of models like the NAM, GFS, Euro are not as accurate when you are literally inside 12 hours or less from go time?

NAM is a short-term mesoscale model that does well inside 24 hours.  However, it has the same weakness as the globals (which are kings of medium range timeframes) in that they only update every 6 hours or 12 hours.  Inside 12 hours, especially within 5 hours,  the short term models gain more weight in consideration since they are run with new data every hour.

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