<div class="eI0">
  <div class="eI1">Modelo:</div>
  <div class="eI2"><h2><a href="http://en.wikipedia.org/wiki/European_Centre_for_Medium-Range_Weather_Forecasts" target="_blank">ECMWF</a>: Global weather forecast model from the "European Centre for Medium-Range Weather Forecasts"</h2></div>
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  <div class="eI1">Actualizado:</div>
  <div class="eI2">4 times per day, from 00:00, 06:00, 12:00 and 18:00 UTC</div>
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  <div class="eI1">Copyright:</div>
  <div class="eI2">This service is based on data and products of the European Centre for Medium-Range Weather Forecasts (ECMWF)<br>Source: <a href="https://www.ecmwf.int">https://www.ecmwf.int</a><br></div>
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 <div class="eI0">
  <div class="eI1">Licence Statement:</div>
  <div class="eI2">This ECMWF data is published under a Creative Commons Attribution 4.0 International (CC BY 4.0).<br>Link: <a href="https://creativecommons.org/licenses/by/4.0/">https://creativecommons.org/licenses/by/4.0/</a>
<br><br>The maps produced by WeatherOnline are subject to the <a href="https://www.weatheronline.co.uk/about/Additional-Terms-of-Use.htm">Terms and Conditions</a>.</div>
 </div>
 <div class="eI0">
  <div class="eI1">Disclaimer:</div>
  <div class="eI2">ECMWF does not accept any liability whatsoever for any error or omission in the data, their availability, or for any loss or damage arising from their use.</div>
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  <div class="eI1">Tiempo medio de Greenwich:</div>
  <div class="eI2">12:00 UTC = 14:00 CEST</div>
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  <div class="eI1">Resoluti&oacute;n:</div>
  <div class="eI2">0.25&deg; x 0.25&deg;</div>
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  <div class="eI1">Par&aacute;metro:</div>
  <div class="eI2">CAPE and vertical velocity at 700 hPa</div>
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  <div class="eI1">Descripci&oacute;n:</div>
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The Convectively Available Potential Energy (CAPE) map - updated every 6 hours - shows the modelled convectively available 
potential energy. CAPE represents the amount of buoyant energy (J/kg) available to accelerate a parcel vertically, or the amount of work 
a parcel does on the environment. The higher the CAPE value, the more energy available to foster storm growth. The
potential energy can be converted to kinetic energy reflected in upward motion.
<BR>
It should be remembered that CAPE represents potential energy, and will only be used should a parcel be lifted to the level of free convection. 
When values are above 3500 j/kg and storms do develop, they may build rapidly and quickly become severe. 
Often these storms are referred to as "explosive storms" by chasers and professionals. In a high CAPE environment 
storms that develop can usually be seen by the human eye as rising rapidly.
Higher CAPE typically involves stronger storms with a higher chance of large hail and other severe weather. Note that
CAPE is usually of lesser importance than the vertical shear environment for tornadoes. The probability of large hail increases 
with CAPE, given at least moderate shear(values around 500-1000 J/kg are sufficient). 
<BR>
CAPE is very sensitive to small differences in the moisture and temperature profiles. While the maps indicate
1000 J/kg CAPE at some location, a <a href="/cgi-bin/expertcharts?LANG=nz&MENU=0000000000&CONT=euro&MODELL=temps&MODELLTYP=4&BASE=-&VAR=temps&LKEY=UK&HH=6&ARCHIV=0&SHOW=1">skew-T thermodynamic diagram</a> at that location may indicate 500-1500 J/kg.
(Source: <a href="http://www.lightningwizard.com" target="_blank">The Lightning Wizard</a>)
<BR>
Table 1: Characteristic values for CAPE<BR>
<TABLE border=1>
<TR>
   <TD><STRONG>CAPE value</STRONG></TD>

   <TD><STRONG>Convective potential</STRONG></TD>
</TR>
<TR>
   <TD>0 </TD>
   <TD>Stable</TD>
</TR>
<TR>
   <TD>0-1000</TD>
   <TD>Marginally Unstable</TD>

</TR>
<TR>
   <TD>1000-2500</TD>
   <TD>Moderately Unstable</TD>
</TR>
<TR>
   <TD>2500-3500</TD>
   <TD>Very Unstable</TD>
</TR>

<TR>
	<TD> 3500 + </TD>
	<TD> Extremely Unstable </TD>
<TR>
</TABLE> 

    
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  <div class="eI1">NWP:</div>
  <div class="eI2">Numerical weather prediction uses current weather conditions as input into mathematical models of the atmosphere to predict the weather. Although the first efforts to accomplish this were done in the 1920s, it wasn't until the advent of the computer and computer simulation that it was feasible to do in real-time. Manipulating the huge datasets and performing the complex calculations necessary to do this on a resolution fine enough to make the results useful requires the use of some of the most powerful supercomputers in the world. A number of forecast models, both global and regional in scale, are run to help create forecasts for nations worldwide. Use of model ensemble forecasts helps to define the forecast uncertainty and extend weather forecasting farther into the future than would otherwise be possible.<br>
<br>Wikipedia, Numerical weather prediction, <a href="http://en.wikipedia.org/wiki/Numerical_weather_prediction" target="_blank">http://en.wikipedia.org/wiki/Numerical_weather_prediction</a>(as of Feb. 9, 2010, 20:50 UTC).<br>
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