NOTE: The data displayed on this page (in the form of images) is not my own and is published here with permission from NOAA. I am in no way endorsed by or affiliated with NOAA or NWS. Click here to see their disclaimer.
If the data below has the incorrect date, then the model might be updating or there is a problem with the model output.
The GFS model is a global numerical model and as a result has a relatively low resolution (~13km first 10 days and ~35km for forecasts beyond 10 days) and therefore cannot necessarily resolve small-scale features (e.g. small topographical effects or even thunderstorms) accurately. Because of this, rainfall totals beneath thunderstorms can sometimes be quite a bit higher than forecast by the model. Similarly, temperatures can be greatly affected by very small-scale wind flow patterns, either up or down mountain slopes. Therefore, my suggestion is that the fields shown below should be used as a guideline for conditions that could be expected.
If the model has run and updated correctly, “Day 1” should be Today’s rainfall, “Day 2” for tomorrow, etc.