Moisture laden fall storm with rain and gusty winds on tap.

A large shield of rain associated with this storm is forecast to spread into Southwestern Ontario tonight and reach the Golden Horseshoe area by Wednesday morning. The rain will continue to March steadily into Central and Eastern Ontario through the day on Wednesday. The rain will likely become heavy at times as the low pressure area deepens. Latest indications continue to suggest 25 to 40 mm of rain in most areas. Locally higher amounts of 40 to 50 mm are possible, especially near lakes Erie and Ontario.

A clap or two of thunder is quite possible over a few locales, along with rainfall approaching Environment Canada’s rainfall warning criterion of 50 mm within 24 hours.

Additionally, strong and gusty southerly winds are forecast to develop on Wednesday over Southwestern Ontario then on Wednesday night over remaining parts of Southern Ontario. Wind gusts to 70 km/h are likely in most areas. Even stronger winds are quite possible near the eastern ends of Lake Erie and Lake Ontario, where wind gusts may approach the warning threshold of 90 km/h. Winds will become southwesterly on Thursday with strong gusts possible.

These winds may be strong enough to cause some tree damage and local power outages, especially in areas where trees remain in partial to full leaf.

The rain and strong winds will end by Friday as the fall storm moves away into Northern Quebec.

The public is advised to monitor future forecasts and warnings as warnings may be required or extended.