Chance of showers/ thundershowers?

Forecast We had a bit of a brief thundershower yesterday, a couple claps mainly to the north of town. Today won't be quite as warm so probably less of a chance  today. Today A mix of sun and cloud with 30 percent chance of showers. Risk of a thunderstorm this afternoon.  High: 22 °C Tonight Mainly cloudy. 30 percent chance of showers changing to 70 percent chance of showers near midnight. Risk of a thunderstorm this evening.  Low: 9 °C Tuesday Mainly cloudy with 70 percent chance of showers. Risk of a thunderstorm in the afternoon and evening.  High: 17 °C Wednesday Showers.  Low: 8 °C High: 16 °C Thursday Showers.  Low: 10 °C High: 14 °C Friday Cloudy with 30 percent chance of showers.  Low: 9 °C High: 20 °C Saturday A mix of sun and cloud.  Low: 12 °C High: 22 °C Sunday A mix of sun and cloud.  Low: 13 °C High: 23 °C Forecast Issued: Monday, June 17 2013 05:00 PDT

Almanac For June 17 Value Year Greatest Rainfall (1977-2012) 17.2 mm 2005 Greatest Precipitation (1977-2012) 17.2 mm 2005 Highest Temperature (1977-2012) 30.8 °C 1982 Lowest Temperature (1977-2012) 2.8 °C 2001 Average Maximum Temperature 19.5 °C   Average Minimum Temperature 7.1 °C   Average Temperature 13.3 °C   Sunrise 05:02 Sunset 21:24 Normal High 20 °C Normal Low 7 °C