Forecast Intervals

Forecast Intervals

Various models used with the forecast layers have different intervals at which they are updated, the total number of intervals they extend into the future (from their initialization time), and the global regions they cover. Use the following information to determine which model is best for your use case.

ModelRegionIntervalsRefresh Interval
HRRRCONUS~18 hoursHourly
NAMCONUS60 hours6 hours*
GFSGlobal360 hours6 hours*

* Updates at 0Z, 6Z, 12Z and 18Z