|Provider:||National Centers for Environmental Prediction, NOAA (USA)|
|Model scope:||North America|
|Update frequency:||every hour|
|Model duration:||19 forecasts starting at 0 hr, ending at 18 hrs|
|Parameters:||pressure, wind, wind gust, rain, cloud, temperature, humidity, convection, simulated radar, 250 mb, 500 mb, 850 mb|
|GRIB model date:||Mon Apr 23 21:00:00 2018 UTC|
|Download date:||Mon Apr 23 22:27:01 2018 UTC|
|Download delay:||1hr 27min|
HRRR is a high resolution model, which offers short term forecasts which are updated every hour. Global, coarser resolution models have difficulty in providing useful information for sailors in inland waters. There are many examples of this - including the waters surrounding Puget Sound, or any of the many coastal bays such as San Francisco’s Bay area or the Chesapeake Bay area. With HRRRs 3km resolution, these areas now have access to high quality, short term forecasts.
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. If your interest in weather is storm related - either due to your living in a region that may be impacted by storms or for some other interest - this it the best model for you to observe. Storms can change rapidly, and as this model is updated hourly and offers the highest resolution, it is the best choice for watching storms develop and progress.
Note that all of the wind barbs in the image represent actual data points
from the HRRR model. There are many more data points than with the highest
resolution GFS model.
This is the San Franciso Bay Area. Again, note that the wind barbs are located on actual data points from HRRR. This is a high resolution model.