I definitely screwed something up

First, in the process of creating the forecast for Milwaukee, I transcribed the forecast from Weatherbug incorrectly. It was about 15 degrees off on the Friday high for everyone else. Of course, the forecast was flat out wrong for everyone else anyways. Clouds and some pretty substantial cold advection knocked temperatures down to the low 30s for a high Friday and in the 40s on Saturday. Of the forecasters that ended up getting their appropriate forecasts in, the best was Victoria-Weather and the Weather Channel. But it was nothing to be proud of.
Actuals: Friday, High 33, Low 27
Saturday – High 42, Low 29

Grade: D