The forecast was unstable in Calgary on Tuesday and it will continue to be overnight and through much of Wednesday. Showers and thunderstorms are possible overnight. Showers possible early Wednesday morning up until 8 a.m. The skies should clear out after that, but showers and thunderstorms could return after 4 p.m. After Wednesday, a ridge of high pressure will build in, which will create a stable environment for the rest of the week. The temperatures are also expected to climb back into the twenties by the weekend. Check out this wild shot of a storm near Strathmore on Tuesday, taken by Jean Thiessen.