HWRF Users Page | Redirect> </head> <body> If you are not redirected automatically, follow this <a href='https://dtcenter.org/community-code/hurricane-wrf-hwrf'>link</a>.  <div id="ncarheader"> <img src="/HurrWRF/users/images/header_HurrWRF.jpg" alt="Website header"> </div> <div id="googlesearch"> <form name="google" method="get" action="http://www.google.com/search" > <a href="https://www2.ucar.edu/advanced-search">advanced</a> <input type=hidden name=hq value="site:www.ucar.edu"> <input type=submit name=sa value="Search UCAR"> <input type=text name=q size=12 maxlength=255> </form> </div> </div>  <div id="breadcrumb_nav"> <ul> <li>You are here: <a href="/index.php">DTC </a></li> <li>• <i>Hurricane WRF Users Page</i></li> </ul> </div> <div id="column_pagenav"> <div id="pagenav"> <div class="suckerdiv"> <ul id="suckertree1"> <li><a href="/HurrWRF/users/index.php">Home</a></li> <li><a href="/HurrWRF/users/others/index_termsofuse_HurrWRF.php">Terms of Use</a></li> <li><a href="/HurrWRF/users/overview/index.php">Overview</a></li> <li><a href="/HurrWRF/users/support/index.php">User Support</a> <ul>  <li><a href="/HurrWRF/users/support/release_notes/index.php">HWRF Release Notes</a></li> <li><a href="/HurrWRF/users/support/faqs/index.php">HWRF FAQ</a></li> <li><a href="/HurrWRF/users/support/known_issues/index.php">HWRF and Tracker Known Issues</a></li> <li><a href="/HurrWRF/users/support/datasets/index.php">Sources of HWRF Data</a></li> <li><a href="/HurrWRF/users/support/release_notes/index.tracker.php">GFDL Tracker Release Notes</a></li> <li><a href="/HurrWRF/users/support/index_help.php">Contact WRF for Hurricanes Help</a></li> </ul> </li> <li><a href="/HurrWRF/users/downloads/index.php">Downloads</a> <ul> <li><a href="/HurrWRF/users/downloads/ahw_download/index.php">AHW System</a></li> <li><a href="/HurrWRF/users/downloads/index.php">HWRF System</a></li> <li><a href="/HurrWRF/users/downloads/index.tracker.php">GFDL Vortex Tracker</a></li> <li><a href="/HurrWRF/users/downloads/observations/index.php">HWRF Datasets</a> <ul> <li><a href="/HurrWRF/users/downloads/observations/index.php">HWRF Datasets</a></li> <li><a href="/HurrWRF/users/downloads/observations/index.tracker.php">GFDL Tracker Datasets</a></li> </ul> </li> <li><a href="/HurrWRF/users/downloads/internal/index.php">Internal Info (UCAR only)</a> <ul> <li><a href="/HurrWRF/users/downloads/internal/index.php">Internal Info for HWRF (UCAR only)</a> <li><a href="/HurrWRF/users/downloads/internal/index.tracker.php">Internal Info for GFDL Tracker (UCAR only)</a> </ul> </li> </ul> </li> <li><a href="/HurrWRF/users/docs/index.php">Documentation</a></li> <li><a href="/HurrWRF/users/overview/hwrf_idealized.php">Idealized</a></li> <li><a href="/HurrWRF/users/tutorial/index.php">Tutorials & Workshops</a> <ul> <li><a href="/HurrWRF/users/tutorial/2018/index.php">Upcoming Tutorial</a></li> <li><a href="/HurrWRF/users/tutorial/index.php">Past Tutorials & Workshops</a></li> <li><a href="/HurrWRF/users/onlinetutorial/index.php">Online Tutorial</a></li> </ul> </li> <li><a href="/eval/hurricane">Testing and Evaluation</a></li> <li><a href="/HurrWRF/developers/index.php" target="_blank">HWRF Developers Info</a></li> <li><a href="/HurrWRF/users/others/index_links_HurrWRF.php">Additional Links</a></li> </ul> </div> </div> </div> <div id="wrap_pagecontent"> <div id="column_pagecontent"> <div id="pagefeature"> <div id="headingdiv"><h1>Frequently Asked Questions</h1></div> </div> <h3>Q: How do I get help if my questions are not answered in the User's Guide?</h3> <strong>A:</strong> First, refer to the documentation on this website. If that doesn't answer your question, then write to <a href= "http://www.dtcenter.org/HurrWRF/users/support/index_help.php"> HWRF helpdesk.</a></p> <h3>Q: How do I get data for running HWRF?</h3> <strong>A:</strong> Please refer to our <a href= "http://www.dtcenter.org/HurrWRF/users/downloads/HWRF_input_data_sources.pdf" >data FAQ.</a></p> <h3>Q: Can I run HWRF without the GFS ensemble?</h3> <P><strong>A: </strong>Yes. The GFS ensemble is used as input to GSI during data assimilation. When the GFS ensemble is available, GSI runs in ensemble-variational hybrid data assimilation mode and uses flow-dependent information to create the background error covariance matrix. Conversely, when the GFS ensemble is not available, GSI uses the previously generated static background error covariance. </P> <h3>Q: What modules and settings are required to build and run on cheyenne?</h3> <p><strong> A: </strong> Please refer to the HWRF v4.0 Users Guide (Appendix B: Example of Computational Resources and Notes for NCAR-Cheyenne) for recommended modules and resources to run on Cheyenne. </div> <div id="column_subcontent_wrap"> <div id="column_related_fullwidth1"> <div id="column_related_fullwidth1"> <h2>Events</h2> <div id="events"> <p>No Upcoming Events</p> </div> <div id="Announcements"> <h2>Announcements</h2> <ur> <li>5 November 2018</li> <p><a href="/node/631">HWRF v4.0a Release</a></p> <li>23-25 January 2018 <p><a href= "http://www.dtcenter.org/HurrWRF/users/tutorial/2018">Hurricane WRF Tutorial</a></p> </li> </ur> </div> <h2>Organizations contributing to this website</h2> <table border="0"> <tr> <td>Developmental Testbed Center <a href="http://www.dtcenter.org/" target="_blank" >(DTC)</a></td> </tr> <tr> <td> NCAR's Mesoscale & Microscale Meteorology Division <a href="http://www.mmm.ucar.edu/" target="_blank" >(MMM)</a></td> </tr> </table > </div> </div>  <div id="column_related_fullwidth1"> <h2>Sponsors of WRF for Hurricanes</h2> <table border="0"> <tr> <td><a href="http://www.noaa.gov/"><img src="/HurrWRF/users/images/NCAR_logo.jpg" alt="NCAR logo" width="120" height="120" /></a> </td> <td><a href="http://www.noaa.gov/"><img src="/HurrWRF/users/images/noaa_logo_small.gif" alt="NOAA logo" width="90" height="90" /></a> </td> </tr> <tr> <td><a href="http://www.ncar.ucar.edu" target="_blank" >National Center for Atmospheric Research (NCAR)</a> </td> <td><a href="http://www.noaa.gov/" target="_blank" >National Oceanic and Atmospheric Administration (NOAA)</a> </td> </tr> </table> </div> <div id="column_related_fullwidth1"> <h2> Community HWRF Website Visits since v4.0a</h2> <a href="https://m.maploco.com/details/4c45weqs"><img style="border:0px;" src="https://www.maploco.com/vmap/s/9910180.png" alt="Locations of Site Visitors" title="Locations of Site Visitors"/></a>  </div> </div> </div> <br class="clearboth"/>  <div id="footer"> <div id="footer"> <p> ©2023, DTC • Postal Address: P.O. 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