YOU SAID:
Today there was a great weather forecast but it was a mistake
INTO JAPANESE
今日はそこに素晴らしい天気予報でしたが、それは間違いでした
BACK INTO ENGLISH
There was great weather today, but it was a mistake
INTO JAPANESE
そこ素晴らしい天気が今日はあったが、それは間違いでした
BACK INTO ENGLISH
There wonderful weather was today, but it was a mistake
INTO JAPANESE
今日、お天気があったが、それは間違いだった
BACK INTO ENGLISH
Today, there was a weather, it was a mistake
INTO JAPANESE
今日、天気があった、それは間違いだった
BACK INTO ENGLISH
Today the weather was, it was a mistake
INTO JAPANESE
今日は天気が、それは間違いだった
BACK INTO ENGLISH
The weather today, but it was a mistake
INTO JAPANESE
今日の天気は、それは間違いでした
BACK INTO ENGLISH
Today's weather, but I was wrong
INTO JAPANESE
今日の天気、しかし、私が間違っていた
BACK INTO ENGLISH
Today's weather, but I was wrong
That didn't even make that much sense in English.