GRIB Model

HRRR Alaska - High Resolution Rapid Refresh

Provider:National Centers for Environmental Prediction, NOAA (USA)
Model scope:Alaska
Update frequency:every 3 hours
Resolution:1.6nm, 3.0km
Model duration:19 forecasts starting at 0 hr, ending at 18 hrs
Parameters:pressure, wind, wind gust, rain, cloud, temperature, humidity, smoke, simulated radar, visibility, 250 mb, 500 mb, 850 mb
GRIB model date:Sun May 26 12:00:00 2024 UTC
Download date:Sun May 26 13:18:19 2024 UTC
Download delay:1hr 18min

Note: the Download delay is the amount of time required for the GRIB model to compute its forecast and then for the LuckGrib cluster to download the data and make it available. The LuckGrib delay is generally less than 10 minutes, the remainder of the delay is the model compute time.


HRRR Alaska is a high resolution model offering short term forecasts updated every hour.

The following description has been taken directly from the official documentation

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

There is a short video available which describes the model further.

Storms: Note that this model is intended to be able to resolve storms. Storms can change rapidly, and as this model is both updated frequently (every 3 hours) and has a high resolution, it may be the best choice for watching storms develop and progress.

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