What do the grades mean?
Grades will be displayed to show how accurate the predictions for a forecasted day have been. Below is a list of the possible grades and their definitions.
A - The forecast was extremely accurate.
B - The forecast was accurate.
C - The forecast was fair, but had some inaccuracies.
D - The forecast was inaccurate.
F - The forecast was very inaccurate.
How are the grades calculated?
Grades are based on three parameters: Temperature, Possibility of Precipitation, and Weather Warnings.
Is the average temperature predicted within the the predicted high and lows of the day? If so, a point will be given for each day that has the correct prediction. Otherwise, no points will be given.
Probability of Precipitation (P.O.P)
If the P.O.P was over 30% and it did rain, then a point will be given for each correct prediction. If the P.O.P was under 30% and it didn't rain, then a point will be given for each correct prediction. Otherwise, no points will be given.
Was there a weather warning predicted in the forecast? If so, a point will be given to each day that correctly forecasted a warning. Otherwise, no points will be given.
On the forecasted day, an overall score will be given based on the average score for temperature, probability of precipitation, and weather warning. A grade will then be given based on the average scores of each prediction.