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Models
- Tropical Tidbits GFS National - Free access to most forecast models.
- pivotal weather GFS National
- WeatherBell Some models are free
GFS
This older model is not as accurate. GFS is run four times a day and produces forecasts for up to 16 days in advance, but with decreased spatial resolution after 10 days.
GFS-FV3
Newer, more accurate GFS model. Still being developed.
NAM
Short-term weather forecasting. The model is run four times a day (00, 06, 12, 18 UTC) out to 84 hours.
NAM 3km
HRRR
The HRRR is a NOAA real-time 3-km resolution, hourly updated, cloud-resolving, convection-allowing atmospheric model, initialized by 3km grids with 3km radar assimilation. Radar data is assimilated in the HRRR every 15 min over a 1-h period adding further detail to that provided by the hourly data assimilation from the 13km radar-enhanced Rapid Refresh .
RAP
The Rapid Refresh is the continental-scale NOAA hourly-updated assimilation/modeling system operational at NCEP. RAP covers North America and is comprised primarily of a numerical forecast model and an analysis/assimilation system to initialize that model. RAP is complemented by the higher-resolution 3km High-Resolution Rapid Refresh (HRRR) model, which is also updated hourly and covering a smaller geographic domain.
Mike Wills