<div class="eI0"> <div class="eI1">Observation:</div> <div class="eI2"><h2>Soundings</h2></div> </div> <div class="eI0"> <div class="eI1">Update:</div> <div class="eI2">5:00 UTC und 16:00 UTC</div> </div> <div class="eI0"> <div class="eI1">Greenwich Mean Time:</div> <div class="eI2">12:00 UTC = 13:00 BST</div> </div> <div class="eI0"> <div class="eI1">Variables:</div> <div class="eI2">Temperature, Dewpoint and Wind</div> </div> <div class="eI0"> <div class="eI1">Description:</div> <div class="eI2"> <b>Sounding </b>describes a plot of the vertical profile of temperature and dew point (and often winds) above a fixed location). Soundings are used extensively in severe weather forecasting, e.g., to determine instability, locate temperature inversions, measure the strength of the <b>cap</b> (capping inversion), obtain the convective temperature, <a href="http://www.weatheronline.co.uk/feature/cc270503.htm" target="_top"><b>CAPE</b></a> (Convective Available Potential Energy) and <b>CIN </b>(Convective Inhibition). <br><br>Soundings a usually carried out with an instrument called <a href="http://www.weatheronline.co.uk/feature/wf170103.htm" target="_top"><b>radiosonde</b></a> an the results are usually plotted in a so-called <b>skew-t / log (p) </b>diagram. <br><br> Horizontal lines represent height in pressure coordinates (millibars or hPa); diagonal lines represent temperature. Heavy solid lines show the vertical profile of observed temperature (red) and <a href="http://www.weatheronline.co.uk/feature/wf261001.htm" target="_top"><b>dew point</b></a> (blue). The grey line shows the temperature of a parcel of surface air and how its temperature would change if it would be lifted. </div> </div>