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4Warn Weather BLOG |
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March 2008
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July 2007 ArchivesOn the news tonight I mentioned that we're forecasting an air quality day that will reach levels unhealthy for people with sensiteve needs, and that specifically the 4Warn Aircast is low level ozone. But isn't ozone good? Aren't we trying to replace the ozone hole? Those are some good questions, let me get to the answers: What is Low Level ozone? This Saturday wasn't extremely hot, but it certainly was humid. If you found yourself dripping in sweat while working or exercising outdoors today, here's why; When we sweat, the beads of water on our skin evaporate into the air. This evaporation creates a little pocket of cooler air near the skin where the bead of water has evaporated. Imagine hundreds of beads of sweat evaporating! This creates a little layer of cooler ai... A week ago Lambert airport recorded 2.12". Since then...notta, zilch, dry. And although it hasn't been excessively hot, it's been warm enough to suck the moisture out of the ground. When the air is warm, it encourages evaporation. So the moisture in the soil evaporates into the warm afternoon air to help form some puffy clouds perhaps, but not rain clouds lately. Well, just as we get hotter and more humid, a cold front will pull in... It's Steve here in the weather center, it's painful to come in to work on great July days like this. Everywhere I've been this weekend people remark about how nice the weather is. We expect, and often get, much hotter and humid days in July, so this is a nice reprieve...but why? And how much longer will it last? Well, the reason for our comfortable weather is that the heat and humidity are being cut off to the West. In fact, you can... On July 19 of 2006, after a hot and humid afternoon with highs near 100, a cluster of thunderstorms tore a path through the St. Louis metropolitan area, leaving in its wake incredible wind damage and hundreds of thousands of residential electricity customers in the dark. Based on the damage left behind, and data from sensors across the region, wind speeds in the metro likely ranged between 70 and 80 miles per hour, with some spots in Illinois... Relative humidity can be a difficult concept to understand. It is expressed as a percentage...but a percentage of what? In the simplest terms I can manage relative humidity is a measure of how full the atmosphere is of water vapor at a given temperature. The temperature is the key because warm air will hold more water vapor than cold air. Say we have a parcel of air that is 80 degrees with a relative humidity of 60%. If we ra... Hi everyone -- Matt here in the 4Warn Weather Center... Is it just me, or is the local forecast for the 4th of July always bascially the same? Year in and year out, it seems as though the Independence Day outlook calls for humid weather with a chance of showers and thunderstorms. As one who doesn't often break with tradition, I'm calling for humid weather with a chance of showers and thunderstorms. Original,... |
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