With only half the normal rainfall, Fall 2013 was the least rainiest since 2003 and 20th least rainiest since 1872. However, even more impressive is that only about 55 to 60 mm of precipitation (rain and melted snow) fell, placing Fall 2013 in the top 12 to 17 driest on record and driest since 2001. The reason for the range in precipitation is due to extremely erroneous precipitation measurements in November at the airport which have made it next to impossible for me to come up with an exact amount.
|Sep 6 storms southeast of Winnipeg|
October was fairly uneventful for Winnipeg. The highlight was widespread thunderstorms in southwestern Manitoba October 11 which dumped 40-60 mm of rainfall in many areas. Brandon's 43.4 mm for the day was the city's second highest daily rainfall in October since 1890, and was enough to push October 2013 to the 11th rainiest on record.
Another extreme event occurred in late November. A very strong arctic high pressure system sent pressure readings skyrocketing to record values for November. Winnipeg's station-level pressure topped out at 101.64 kPa on the 23rd, the highest pressure reading recorded in November since these records began in 1953.
Other stats about Fall 2013:
First freeze at Winnipeg airport: September 21 at -1.3°C
Length of growing season at airport: 131 days (4th longest in the last 20 years)
First freeze Winnipeg downtown: October 20 at -1.6°C
Number of severe thunderstorm days in Manitoba: 7 (all in September)
Only 5.0 mm of rain fell in the first 25 days of September in Winnipeg