The 100 m false-colour image of 28 November 2015 shows us part of the province Saskatchewan, west-central Canada, covered with snow. Saskatchewan has a total area of 651,900 square kilometres, of which only 592,534 square kilometres is land. The remaining 59,366 square kilometres is fresh water, composed mostly of rivers, reservoirs, and the province's 100,000 lakes. Winters are usually bitterly cold, with frequent Arctic air descending from the north. with high temperatures not breaking −17 °C for weeks at a time. Warm chinook winds often blow from the west, bringing periods of mild weather. Annual precipitation averages 30 to 45 centimetres across the province, with the bulk of rain falling in June, July, and August. Saskatchewan is one of the most tornado-active parts in Canada, averaging roughly 12 to 18 tornadoes per year, some violent.