I always consult yr.no - the Norwegian met office - for a second opinion. One advantage of yr.no is the utterly brilliant presentation of the forecast, especially if you chose the hour by hour (or "time for time" if the English language option has let you down) option. You are left rather less in doubt of exactly what they are forecasting.

There often is a material difference between the two forecasts, and I find quite often the outcome lies between the two.

It is very difficult to forecast precisely what area precipitation will occur, and at what time. If you are located near the edge of a forecast precipitation zone, the likelihood of you being dissatisfied with the forecast you got are always going to be high.