Archive for the ‘Tutorial’ Category

How to make a severe storm

Posted: 25th June 2013 by Jason in Tutorial

Severe storms are what we do, but not many people know what ingredients need to come together to turn a clear blue day into something that catches a chasers eye.  This is a high level view of how a storm comes together, for a really good treatise on the subject check out Tim Vasquez storm […]

Reading the SPC outlook image

Posted: 17th April 2013 by Jason in Tutorial

The St Louis area is in for an active 24 hours with this latest round of sever weather, so I thought it would be a good time to briefly go over the information that the SPC is trying to convey when they post an outlook image. The SPC Day 1 image shows what areas are […]

What’s a Skew-T, part 7

Posted: 8th March 2013 by Jason in Tutorial

In this final tutorial on Skew-Ts, we’re going to put everything we’ve talked about together.   We’re using the same Skew-T that we’ve been talking about since the start, but now we have enough information to identify, at least partially, if our storm has some of the ingredients that it needs in order to make you […]

What’s a Skew-T, part 6

Posted: 7th March 2013 by Jason in Tutorial

Here is a Skew-T that has had some environmental data pasted into it.  Everyday balloons are sent up that take various measurements at specific levels of the atmosphere, two of them being temperature and dewpoint. What you are looking at here is essentially the result of a balloon with a thermometer and a hygrometer being […]

What’s a Skew-T, part 5

Posted: 6th March 2013 by Jason in Tutorial

The wet (or sometimes called moist) adiabat is a dashed line on the Skew-T that starts at the bottom of the graph and, depending on the starting temperature, wiggles it’s way towards the north west or north east.  The wet adiabat is very similar to the dry adiabat, but the rate of temperature change is […]