A disturbance approaching Central Minnesota this morning is forecast
to reach the Central Great Lakes tonight. Potent thunderstorms are
likely to form later this afternoon near a warm front affiliated with
the low. They are expected to cross Southern Ontario tonight, and
will likely generate some much needed rain in many areas in a swath
from Lake Huron and Georgian Bay to Lake Ontario and possibly Lake
Erie. It may well be the most widespread rainfall in weeks across
portions of Southern Ontario. General amounts of 15 to 30 mm are
quite possible with locally higher amounts in excess of 50 mm
possible in the heaviest thunderstorms. The thunderstorms may be
quite intense with the potential for damaging wind gusts and large
hail in addition to the heavy downpours. A spectacular display of
frequent and intense lightning will also likely accompany the storms.
