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<html>
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<title>WRFDA: Beta releases</title>
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<meta name="KEYWORDS" content="meteorology, mesoscale, microscale, weather modeling, forecasting weather, weather prediction, predictability, cloud systems, boundary layers, surface-atmosphere interactions, convective cloud systems, atmospheric chemistry, precipitating weather systems, wildfire research, National Center for Atmospheric Research">
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<p class="pagetitle">WRFDA: Beta releases</p>
<p class="bodytext">WRFDA is undergoing continuous development as more capabilities are added, both by NCAR scientists and community contributors. On this page you can find pre-release versions of new capabilities. As these capabilities are new and not fully tested, we appreciate any feedback you can offer: contact us through <a href="wrfhelp.html">wrfhelp</a> or the <script type='text/javascript'><!--
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//--></script><noscript><a href='http://w2.syronex.com/jmr/safemailto/#noscript'>WRFDA webmaster (with anti-spam)</a></noscript>.</p>
<p class="bodytext">Below is a list of the current beta releases we have available.</p>
<h2>GEN_BE with discontinuous input data</h2>
<p class="bodytext">The GEN_BE utility takes WRF forecast output and generates a be.dat file that contains background error statistics. These statistics are typically calculated using the so-called "NMC method" where forecasts initialized at different times but valid at the same time are compared to each other. In previous releases of WRFDA, GEN_BE required users to input a continuous set of data, where there is a continuous series of forecasts initialized every 12 hours (for example). If there is just one missing input file out of dozens or even hundreds, GEN_BE produced a fatal error. However, this was a coding limitation, mathematically there is no reason to not just discard the dates with missing data.</p>
<p class="bodytext">This beta release introduces a flag value ALLOW_MISSING_DATES to the gen_be_wrapper.ksh script. Putting the following line in your gen_be_wrapper.ksh script will activate the capability to tolerate gaps in input data:</p>
<p class="code">export ALLOW_MISSING_DATES=.true.</p>
<p class="pagetitle">Download pre-release code</p>
<p class="bodytext"><b>To download beta release code:</b><br><br>
Fill out the registration form by clicking <b>'New Users'</b> below, or select <b>'Returning Users'</b> if you have already registered to download WRF or WRFDA in the past. You will be redirected to a page where you can download a tar file with the code you are interested in.</p>
<p class="bodytext"><a href="download/beta-regist.php"><big><strong>New Users</a><br>
<br><a href="download/beta-return.php">Returning Users</strong></big></a><br><br></p>
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