Monday, May 29, 2006

Posting will be slowing

Posting is going to slow down a bit, because I have a lot of hard physical work at the Fort, and that doesn't fit well with the stomach-problem-no-one-has-solved. I need to rest lots after work so that I don't get sick, and so I can stop losing weight (7 lbs in 2 weeks!!!). Because I've been resting, there's been very little knitting and sewing. My only news is that I went to my hot and stuffy graduation, but had a lovely lunch and dinner with my family, and suffered a wicked migraine yesterday.

It's very hot here, with a humidex of 29C (for anyone who doesn't know, the humidex is the actual outside temperature that your body feels, which is higher than the air temperature). People sometimes think of the humidex as the summer equivalent of wind chill, which it isn't. Wind chill is an indication of how much faster heat and water will dissapate from human skin - only exposed skin will feel colder, and it can freeze faster. However, the temperature outside is still the listed temperature and not the windchill. If the temperature is -30C, exposed skin will freeze in less than 5 minutes, but if it's windy, you may see a "-40C Windchill" on top of the -30C. This means that exposed skin FACING THE WIND will freeze in less than one minute, the time in which it would freeze if the day was -40C with no wind. The temperature is still -30C, but your exposed skin facing the wind will behave as if it is -40. This is why some provinces use a windchill factor number (a sever windchill is 2800) to better explain the phenomenon, instead of giving a temperature.

Humidity in the air actually raises the air temperature, but thermometers only measure the dry air temperature (don't take my word for this, this is based on my memory of a book by David Phillips) - therefore the weather service takes into account the amount of humidity in the air, refers to a table, and finds out what temperature it actually is. Dry heat feels less "suffocating" than humid heat, which often irritates asthma and allergies like it is today.

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