3rd and 4th Tornadoes confirmed in Ontario from May 21st 2013

AWCN11 CWTO 242021
Weather summary for all of Southern Ontario and the
National Capital Region issued by Environment Canada
At 4:16 PM EDT Friday 24 May 2013.

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==weather event discussion==

Third and fourth tornadoes of the season confirmed.
…
Ongoing investigations by Environment Canada personnel in the wake of
the strong thunderstorms on May 21 have led to the confirmation of
two additional tornadoes on this day.

At approximately 1:30 PM EDT on Tuesday May 21, an enhanced Fujita
scale zero (ef-0) occurred near the community of Elmvale which is
about 18 kilometres south of Midland. The peak winds involved in this
event were between 90 and 130 kilometers per hour. The length of
damage was 570 metres and the maximum width was 50 metres. The
tornado uprooted or snapped about a dozen mature trees and did very
minor damage to a barn roof.

At approximately 2:00 PM EDT on Tuesday May 21, another enhanced
Fujita scale zero (ef-0) tornado occurred near the community of
dalston which is about 12 kilometres north of Barrie. The length of
damage was 4.5 kilometres and the maximum width was 500 metres. At
least 50 mature trees were uprooted or snapped off along the track
and the cap of a farm silo was damaged.

The enhanced Fujita scale is used to rate the intensity of tornadoes
and damaging wind events. The scale goes from zero (weakest) to 5
(strongest).

Ontario has had 4 tornadoes so far this year. Ontario normally has 12
tornadoes each year in a season that runs from late April until early
October.