Found it thanks.
https://www.spc.noaa.gov/products/md/md1319.html
DISCUSSION...Associated with larger-scale mid/upper troughing
digging in the St. Lawrence Valley/lower Great Lakes region, forcing
for ascent with a lead speed maximum (30-50 kts in the 500-300 mb
layer) appears to be providing support for an ongoing, well
organized cluster of thunderstorms across southeastern Ontario.
Perhaps aided by an associated strengthening surface cold pool, this
activity has accelerated some (up to 40 kt) over the past couple of
hours, and may reach the Ottawa vicinity by around 19Z.
Along trailing outflow into the vicinity of its intersection with a
southward advancing cold front, additional thunderstorm development
and intensification is now also well underway. Supported by
moderate southeasterly low-level inflow of moist air characterized
by CAPE of 1000-2000 J/kg, this seems likely to continue with the
evolution of another upscale growing and organizing cluster/segment
possible. This may begin impacting the Ontario shores of Lake
Ontario into the Watertown vicinity as early as 20-21Z, perhaps a
bit earlier and more substantively than suggested by the latest
Rapid Refresh.
Although low-level wind fields are generally weak, the effective
downward mixing of higher momentum air aloft, associated with the
well developed/maturing organized convective system and associated
surface cold pools, probably will be accompanied by increasing
potential for strong gusts at least approaching severe limits.