Hey… can you believe it? I almost forgot to post my semi-annual rant about having to change to daylight saving time. Fortunately for you, I remembered.
This evening most of North America sets its clocks forward an hour in a vain attempt to save energy. I say vain attempt because there hasn’t been any sound evidence that adjusting the clocks to chase the sunshine has actually resulted in any reduction in the demand for energy. There is, however, evidence that shows an increase in accidents in the days immediately following the switch.
Though I never met him, I was sad to learn yesterday of the passing of Roger Tomlinson a couple of weeks ago. Though I never met him, it’s safe to say that I would not have the job I have today were it not for him.
January 06, 2014 @ 22:58By: gordon Category: Weather
Just before noon today I noticed that the sky to the north of the Ottawa River was nice and clear, while the sky to the south was overcast. Well, that’s because the boundary between the high pressure to the north and the low pressure to the south was more or less right there.
The temperature at Ottawa Airport a few minutes later (i.e. noon) was -5C, while in Pembroke about 2 hours to the northwest it was -12C and -16C in North Bay, which is a couple of hours past Pembroke.
If you check out the following two graphs, you can see the incoming cold air coming in from the northwest:
January 05, 2014 @ 22:16By: gordon Category: Weather
So, 2014 is off to a bit of an extreme start weather-wise. We saw -27C weather that felt like -40 thanks to the wind last Thursday, and Winnipeg was colder than Mars.
This evening, it’s about -5C and forecast to go above 0C tomorrow. The incoming warm front has been causing the air pressure to plummet the last few hours (the blue line in the graph below) and we can expect to see freezing rain and probably rain overnight and in the morning. A few hours after that, we can expect to see the cold air return with over the course of a few hours, which should make the evening commute rather messy, with the evening forecast to be -24C and a windchill of -33.
If you look at the aviation forecast, you can see the wind change direction from being out of the northeast (050) at midnight local time (0500Z) to coming from the southwest (230) by 8 am (1300Z):