If you look at the models themselves you can look several days out and get an idea of what could happen. https://mag.ncep.noaa.gov/model-guidance-model-area.ph

If you look at the models themselves you can look several days out and get an idea of what could happen. https://mag.ncep.noaa.gov/model-guidance-model-area.php https://mag.ncep.noaa.gov/model-guidance-model-area.php Select GFS (Global Forecasting System, the usual model) and NAMER (North America), then Precip P06 (six-hour precipitation accumulation), and then Loop All. Over time, you learn the behavior of the models; for example the GFS's longer-range predictions tend to overestimate peak rainfall from super heavy storms (it'll predict three inches and we'll get one). It's not as convenient as Wunderground but it's data straight from the source. Other occasionally useful models are the NAM (shorter range and limited to North America) and the HRRR (high time resolution but very short range).