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Tuesday forecast update: Honda Indy Toronto

7/12/2016

Comments

 
By Doug Schneider
I'm feeling more confident about the forecast for Honda Indy Toronto, as the models are coming into better agreement on the timing of rain chances. 

Thursday continues to have a high chance of showers and thunderstorms as a cold front will move across the Great Lakes area. There will be some instability ahead of this front, so some of the storms could be strong, with gusty winds, frequent lightning, and heavy downpours. Rain amounts are expected to be a quarter to a half inch. 

Friday will be when the upper level trough swings through, along with a secondary cold front at the surface. This will bring a good chance of showers in southern Ontario. However, with less instability in the atmosphere compared to Thursday, these showers are expected to be lighter, with very little chance of any lightning. I expect that rain amounts Friday will be less than a tenth of an inch. The timing of these showers appears to favor the afternoon. Temperatures will be cooler on Friday too, with highs in the mid 70s.

Saturday will feature a high pressure ridge building over the Great Lakes. This should provide nice weather for the racing action, with a light north wind supplying comfortable temperatures as well. As the high moves to the east, winds will shift to the south. This will bring warmer temperatures on Sunday, and a few more clouds. I don't expect that there will be any rain on Sunday, but there is a low pressure system that could bring rain on Monday. If this system speeds up, it is possible that I will need to put a low chance of showers into the forecast late on Sunday, but right now, all signs point to a nice day for racing.
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