Kevin Selle
Wichita Falls, TX
Male, 55
I've been a broadcast meteorologist on television since the early 1990's. Happy to answer any questions about the weather or local TV news. Yes, I often wear sneakers on set just out of view of the camera.
Great question. All cloud drops form on a speck of something called a condensation nuclei, dust, smoke, sea salt, etc. The idea with seeding is to introduce these particles, often silver iodide, to encourage the water vapor in the air to condense into a cloud droplet and then merge with other drops to form rain. A lot of question as to if it works but there is enough evidence that people keep trying. Thanks!
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Hello, Kim. The forecast starts with weather balloons taking measurements of the atmosphere, but only a small portion, and only twice a day. Since the network of balloons is small there are usually things that go unseen and some of those things can help develop storms
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For weather the primary tools are satellites, radar and computer forecast models that use weather balloon data and many types of other sensors.
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Great question, Judith. I must say I'm not really familiar with SF climatology. In general air pressure changes with the movement of weather systems so a short move might not have a big effect. But local topography could come into play. I'll suggest your local National Weather Service office would find your question interesting. Good luck! Contact info at the bottom. http://www.weather.gov/mtr/
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Good question, Boyd. When we talk about a high pressure ridge and low pressure trough you can think about those like a hill and valley in the atmosphere. Irma is moving around the edge of the mountain (high) since it can't climb it and the computer forecast models are showing a valley (low) to the north of Florida so it will move to flow toward the valley (downhill). Still some very limited chance for changes, stay tuned.
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Hi, Courtney. I’ll have to pitch that one to meteorologists in the research and numerical modeling fields. I certainly use their products but building them is out of my area. Thanks.
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Thanks for the note. That really is a "climatology" issue as opposed to "meteorology" which is really my area. A climatologist would be better equipped to answer your questions. Thanks.
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