I'm pleased to announce that forecasts from the 3-km High Resolution Rapid Refresh (HRRR) are now available on weather.utah.edu. Here's the 6-hour forecast valid at 0000 UTC (1800 MDT) this afternoon. No showers or thunderstorms in the Salt Lake Valley. Apply the sunblock liberally!
The HRRR is the highest-resolution operational model run by the National Weather Service. Employing radar and other data assimilation wizardry, it produces 15-hour short-range forecasts every hour. For now, I'm downloading a subset of HRRR output for the western United States and providing a couple of surface diagnostic loops, one that includes 10-meter winds and model-derived radar reflectivity, the other that includes 10-meter winds and 1-hour accumulated precipitation. The loops on weather.utah.edu also include analysis frames going back into the past as knowledge of the past is always handy for predicting the future.
More information on the HRRR is available here. It should be handy for ski forecasting this coming winter.