Joe Wurts lecturing on how to find Thermals Part 1

Hi Guys, I found the time to upload Joe lecturing about Thermals and other related soaring stuff while visiting in Israel, and was super nice to lecture at my house in front of 25 of our F3K pilots. This is Part one of many parts i’ll uploads later. This part contains: 1. Meteorology 2. The Playground 3. Typically daily cycle a. The first low level thermals b. Late morning mixing c. Mid day conditions d. Late afternoon conditions e. Evening conditions If you find my channel helpful, Please Support my Videos on the P.P donation button Thermal Structure and Behavior by Wayne M. Angevine For impatient readers, here are the basics: Thermals are like fat trees, with small, chaotic roots near the surface and large trunks above. The trees tilt and sway with the wind and change with time, and sometimes they let go of their roots and drift. Between the trees is sinking air. Where thermals form, their exact shape, and how fast they change is hard to predict, since it depends on details of the interaction between the ground and the air. Key principles to remember are: - Thermals are driven by temperature contrast between the ground and the air. - Air exists in parcels (blobs) that have mass and momentum as well as temperature and humidity. - Plumes near the surface look and act different from thermals well above the surface. Terms: Anabatic: Upslope winds Catabatic: Downslope winds Lapse Rate: The rate of temperature decrease/increase with a change of altitude Inversion: Normal lapse rate with an increase of altitude is lower temperature. An inversion is an increase of temperature with altitude Thermal Structure and Behavior by Wayne M. Angevine Nine pages Joe Wurts lecturing about Thermals Part 1 Joe Wurts lecturing about Thermals Part 2 Joe Wurts lecturing about Thermals Part 3