It pees me off too how they never seem to get it right and I have arrived at the following tongue in cheek solution:-
For 80% of the year the weather in this country is changeable and unpredictable, during this time the weather forecasters have proved time and time again that they cannot give us accurate forecasts, it follows, therefore, that during this time there should be no forecasts as they are a pointless waste of time. The remaining 20% of the time we often experience settled weather conditions and we all enjoy it while we can, during these times we actually do need a weather person (note the omission of the word "forecaster" here ) to tell us with some certainty what the following day will bring. The moment the weather becomes changeable again all methods of weather forecast publishing should cease.
The result is this:- No published weather forecast = Changeable, A published weather forecast = Settled. The defence rests m'lud. Simples