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Tag Archives Atmospheric dynamics

Weather

Issued: Monday, May 17, 2010 Covering: May 19 –May 26

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Summer-like conditions definitely won out over the possible cool, wet conditions for the first half of this forecast period. The warm, dry weather is the result of a split flow in the middle layers of the atmosphere. This is keeping any storm systems well to our north or just to our south. Combine this with
Weather

Still Looking At An El Niño Winter?

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Figure 1 Last issue, I said that we would take a break from El Nińo and take our yearly look at Christmas weather, but I just realized that there is still one more issue before Christmas, so let’s finish up our El Nińo discussion. In the previous articles we discussed how the “normal” flow across
Weather

Cold And Warm Water Affects Our Weather

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Before I dive back into our discussion about El Nińo, did anyone really think we would get through this winter without seeing regular good old-fashioned cold weather? I think we all knew that the amazing period of mild weather would eventually come to an end, but you know, I secretly think there are a lot
Weather

Continuing Our Look At Thunderstorms

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In the last issue, we started talking about thunderstorms and I was forced to end the article in what you might call a “cliff hanger.” We discussed how we need a strong difference in temperature vertically in the atmosphere, with cold air located over top of warm air. Then I went on to say that
Weather

Oscillations And Acronyms

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In our last weather school lesson we took a look at Rossby Waves. You know, the long-term wave patterns that slowly undulate across our part of the world bringing with them much of our ever-changing weather. Yes, I did say much of our weather, as everything can’t be blamed or explained by just looking at
Weather

Rossby Waves

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Last time in weather school we started to examine why our particular part of the world has such changeable weather. We looked at general global circulation patterns and then examined the zone where westerly winds bump up against easterly moving polar winds, creating giant eddies of swirling air. This week we are going to continue
Weather

Conflicting Areas Of Wind

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At the end of our last weather school article I hoped that we would see an early strengthening of the subtropical high which would then hopefully bring a warm and early start to spring. Instead we saw what our part of the world is famous for, big intense areas of low pressure. This week in
Weather

Most Of The World Has Predictable Weather

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Our little break from weather school seems to have stretched out for over a month now. Well, Reading Week (or should I say “Month?”) is over and it’s time to get back to work! In our last lesson we continued our look at atmospheric circulation, and in particular, we built upon our general model of
Weather

General atmospheric circulation

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After the last couple of weather school lessons on wind, we now have a basic understanding of what drives our winds. With this knowledge we are now ready to take this information and start piecing together the bigger picture of global winds, or what is referred to as general atmospheric circulation. We now know that
Weather

Gravity, pressure, Coriolis, friction = wind

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The bigger the difference between areas of high and low pressure, the faster the air will move between them. Most public schools get a couple of weeks off over Christmas and some private schools will give three weeks, but here at Weather School we’re so nice that we give over six weeks of holidays from

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