Tuesday, July 27, 2010

The 30C parade continues

If all goes well today, we should exceed 30C for the 6th time this month and perhaps the 7th tomorrow. We would normally expect that in an entire summer. We have also hit over 29C on four other days. It has been a very warm summer. Combine that with the tropical like humidity and the heavy thunderstorms, and it has been quite a month. We can expect more of that warm air to stream into the region for the next two days from the southern US before a potent cold front moves into Ontario and Quebec by late Wednesday. Winds will increase across the area Wednesday out of the southwest to 60km/h in advance of the front. The front has had a history of severe weather including hail, flooding and tornadoes in northwest Ontario and southern Manitoba. We can expect some decent thunderstorms in the region Wednesday night.

Meanwhile the heat and humidity will be pushed back south where it has been all summer. After having a wicked bad winter in Baltimore and Washington DC, they are in for a record breaking hot summer. Baltimore has reached 100F on 5 occasions this July, the most ever, and 7 times this summer. Washington has reached 90F or hotter on 42 days and counting.

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