Adelaide is heading for a warm Wednesday ahead of a wintry weekend. Northerly winds are building today across SA ahead of a trough. These northerlies are drawing warm interior air southwards, raising temperatures into the summer-like domain. Nights have been mild across the state. In Adelaide the temperature stayed above 13 degrees all night, which is 3 degrees above their average minimum and their warmest night since May. Elsewhere in the state Ceduna residents may have been tossing blankets off through their night, which stayed warmer than 19 degrees, 11 above average. This morning Adelaide has already reached 21 degrees by 9am this morning and should reach a top of 28 this afternoon. The trough will reach Adelaide this evening which will only cause the winds to change into a westerly direction. A stronger change is expected to reach the city early morning on Friday. This will be accompanied by showers and a cold winds which will bring a more winter-like feel to the weekend. Make sure to check weatherzone.com.au for the latest updates.