By way of comparison
The Saguenay Floods of 1996 resulted from major downpours on the 19th and 20th of July. Canadian Forces personnel were engaged in relief operations on the 20th.
Operation RECUPERATION: The Great Ice Storm of 1998 began dropping freezing precipitation on Ontario, Quebec, and New Brunswick on January 5th. The three provinces requested Canadian Forces assistance on January 7th.
The Mel Lastman Blizzards of 1999 culminated with a major snowfall on January 13th. The Toronto mayor requested Canadian Forces assistance on January 14th.
Operation SPLINTER: Hurricane Juan struck Nova Scotia on September 29th, 2003. Halifax Mayor Peter Kelly requested Canadian Forces assistance before the day was out.
Operation CANTON: On December 13, 2010, a winter storm left highways in southwestern Ontario impassable, even to snow-clearing vehicles which themselves became stranded. Emergency Management Ontario requested Canadian Forces assistance the following day.