<div dir="ltr"><div dir="ltr">Greetings everyone. In my email to you on March 30, I described a set of model changes made by EMC
as a result of the excessive snow totals and exacerbated cold bias observed in the real-time parallel runs of GFSv15 (FV3-based GFS) this past winter. EMC evaluated these model changes, and I described the benefits of the new configuration in that same email. </div><div dir="ltr"><br></div><div dir="ltr">Now, those model changes are being expressed in the data available in the real-time parallel of GFSv15, as described below in Steven's email. </div><div dir="ltr"><br></div><div dir="ltr">Cheers,<br><div><div><div dir="ltr" class="gmail-m_-5958154344769038177gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><br></div><div><font face="monospace, monospace">Brian D. Gross</font></div><div><font face="monospace, monospace">Director, NOAA/NWS/NCEP/Environmental Modeling Center</font></div><div><font face="monospace, monospace"><br></font></div><div><font face="monospace, monospace">5830 University Research Court, Room 2050</font></div><div><font face="monospace, monospace">College Park, MD 20740</font></div><div><font face="monospace, monospace"><br></font></div><div><font face="monospace, monospace">Email: <a href="mailto:Brian.Gross@noaa.gov" target="_blank">Brian.Gross@noaa.gov</a><br></font></div><div><font face="monospace, monospace">Phone: 301-683-3748</font></div><div><span style="font-size:12.8px"><font face="monospace, monospace">Cell: 609-439-9702</font></span><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">---------- Forwarded message ---------<br>From: <strong class="gmail_sendername" dir="auto">Steven Earle - NOAA Federal</strong> <span dir="ltr"><<a href="mailto:steven.earle@noaa.gov" target="_blank">steven.earle@noaa.gov</a>></span><br>Date: Fri, Apr 19, 2019 at 8:59 AM<br>Subject: Update to GFS v15 parallel on nomads<br>To: Andy Edman - NOAA Federal <<a href="mailto:andy.edman@noaa.gov" target="_blank">andy.edman@noaa.gov</a>>, Ben Kyger <<a href="mailto:Ben.Kyger@noaa.gov" target="_blank">Ben.Kyger@noaa.gov</a>>, Bill Lapenta <<a href="mailto:Bill.Lapenta@noaa.gov" target="_blank">Bill.Lapenta@noaa.gov</a>>, Bill Ward <<a href="mailto:Bill.Ward@noaa.gov" target="_blank">Bill.Ward@noaa.gov</a>>, <a href="mailto:bob.maxson@noaa.gov" target="_blank">bob.maxson@noaa.gov</a> <<a href="mailto:Bob.Maxson@noaa.gov" target="_blank">Bob.Maxson@noaa.gov</a>>, Brian Cosgrove <<a href="mailto:Brian.Cosgrove@noaa.gov" target="_blank">Brian.Cosgrove@noaa.gov</a>>, Brian Gross - NOAA Federal <<a href="mailto:brian.gross@noaa.gov" target="_blank">brian.gross@noaa.gov</a>>, Bruce Entwistle <<a href="mailto:Bruce.Entwistle@noaa.gov" target="_blank">Bruce.Entwistle@noaa.gov</a>>, Bruce Smith - NOAA Federal <<a href="mailto:bruce.smith@noaa.gov" target="_blank">bruce.smith@noaa.gov</a>>, Carven Scott <<a href="mailto:carven.scott@noaa.gov" target="_blank">carven.scott@noaa.gov</a>>, Christopher Strager <<a href="mailto:Christopher.Strager@noaa.gov" target="_blank">Christopher.Strager@noaa.gov</a>>, David DeWitt <<a href="mailto:david.dewitt@noaa.gov" target="_blank">david.dewitt@noaa.gov</a>>, David Novak <<a href="mailto:david.novak@noaa.gov" target="_blank">david.novak@noaa.gov</a>>, Grant Cooper <<a href="mailto:Grant.Cooper@noaa.gov" target="_blank">Grant.Cooper@noaa.gov</a>>, Gregory Patrick - NOAA Federal <<a href="mailto:gregory.patrick@noaa.gov" target="_blank">gregory.patrick@noaa.gov</a>>, Hendrik Tolman <<a href="mailto:Hendrik.Tolman@noaa.gov" target="_blank">Hendrik.Tolman@noaa.gov</a>>, Israel Jirak <<a href="mailto:Israel.Jirak@noaa.gov" target="_blank">Israel.Jirak@noaa.gov</a>>, Jason Tuell <<a href="mailto:Jason.Tuell@noaa.gov" target="_blank">Jason.Tuell@noaa.gov</a>>, Jeffrey Craven <<a href="mailto:Jeffrey.Craven@noaa.gov" target="_blank">Jeffrey.Craven@noaa.gov</a>>, Jon.Gottschalck <<a href="mailto:Jon.Gottschalck@noaa.gov" target="_blank">Jon.Gottschalck@noaa.gov</a>>, Joseph Sienkiewicz <<a href="mailto:Joseph.Sienkiewicz@noaa.gov" target="_blank">Joseph.Sienkiewicz@noaa.gov</a>>, Kenneth Johnson <<a href="mailto:Kenneth.Johnson@noaa.gov" target="_blank">Kenneth.Johnson@noaa.gov</a>>, Mark DeMaria <<a href="mailto:Mark.DeMaria@noaa.gov" target="_blank">Mark.DeMaria@noaa.gov</a>>, Mark Klein - NOAA Federal <<a href="mailto:mark.klein@noaa.gov" target="_blank">mark.klein@noaa.gov</a>>, Michelle Mainelli <<a href="mailto:Michelle.M.Mainelli@noaa.gov" target="_blank">Michelle.M.Mainelli@noaa.gov</a>>, Mike Bodner - NOAA Federal <<a href="mailto:mike.bodner@noaa.gov" target="_blank">mike.bodner@noaa.gov</a>>, Ming Ji <<a href="mailto:Ming.Ji@noaa.gov" target="_blank">Ming.Ji@noaa.gov</a>>, NCEP.List.modelevalinfo <<a href="mailto:ncep.list.modelevalinfo@noaa.gov" target="_blank">ncep.list.modelevalinfo@noaa.gov</a>>, Raymond Tanabe - NOAA Federal <<a href="mailto:raymond.tanabe@noaa.gov" target="_blank">raymond.tanabe@noaa.gov</a>>, Rebecca Cosgrove <<a href="mailto:rebecca.cosgrove@noaa.gov" target="_blank">rebecca.cosgrove@noaa.gov</a>>, Russell Schneider <<a href="mailto:Russell.Schneider@noaa.gov" target="_blank">Russell.Schneider@noaa.gov</a>>, Steven Cooper - NOAA Federal <<a href="mailto:steven.cooper@noaa.gov" target="_blank">steven.cooper@noaa.gov</a>>, Steven Silberberg <<a href="mailto:Steven.Silberberg@noaa.gov" target="_blank">Steven.Silberberg@noaa.gov</a>>, Thomas Cuff - NOAA Federal <<a href="mailto:thomas.cuff@noaa.gov" target="_blank">thomas.cuff@noaa.gov</a>><br>Cc: Anne Myckow - NOAA Affiliate <<a href="mailto:anne.myckow@noaa.gov" target="_blank">anne.myckow@noaa.gov</a>>, Carissa Klemmer <<a href="mailto:carissa.l.klemmer@noaa.gov" target="_blank">carissa.l.klemmer@noaa.gov</a>>, Wojciech Cencek - NOAA Affiliate <<a href="mailto:wojciech.cencek@noaa.gov" target="_blank">wojciech.cencek@noaa.gov</a>><br></div><br><br><div dir="ltr"><div>All,</div><div>NCO will be making changes to the parallel GFS v15 with today's 1200UTC model run. The details of these changes are below.</div><div><br></div><ol style="margin-top:0pt;margin-bottom:0pt"><li dir="ltr" style="margin-left:15px;list-style-type:decimal;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;background-color:rgba(255,255,255,0)">We changed the way snow amounts were calculated and communicated to the land surface model, basing it on the fraction of frozen precipitation falling on the ground rather than basing it on the total precipitation in cold conditions.</span></p></li><li dir="ltr" style="margin-left:15px;list-style-type:decimal;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;background-color:rgba(255,255,255,0)">We refined the interaction of radiation with cloud particles, allowing for each type of hydrometeor (convective rain, stratiform rain, snow, graupel, and ice) to assume its own physical characteristics as calculated by the GFDL microphysics scheme (like particle radius) and interact accordingly with the radiation scheme.</span></p></li><li dir="ltr" style="margin-left:15px;list-style-type:decimal;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;background-color:rgba(255,255,255,0)">We updated the supersaturation parameter over ice in the data assimilation system.</span></p></li><li dir="ltr" style="margin-left:15px;list-style-type:decimal;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;background-color:rgba(255,255,255,0)">We updated the Data Assimilation to assimilate NPP OMPS ozone, place NOAA-19 SBUV/2 ozone in monitor, assimilate Meteosat-11 SEVIRI channels 5 & 6, update QC for GOES AMVs in preparation for GOES-17 <br></span></p></li></ol><div><br></div><div><div><br class="gmail-m_-5958154344769038177m_7468453949414769568gmail-m_-1090860038165559377gmail-Apple-interchange-newline">The data remains available at the following locations:</div><div> <a href="https://para.nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/para/" target="_blank">https://para.nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/para/</a></div><div> <a href="https://para.nomads.ncep.noaa.gov/pub/data/nccf/noaaport/gfs/" target="_blank">https://para.nomads.ncep.noaa.gov/pub/data/nccf/noaaport/gfs/</a></div><div> <a href="https://para.nomads.ncep.noaa.gov/pub/data/nccf/noaaport/gdas/" target="_blank">https://para.nomads.ncep.noaa.gov/pub/data/nccf/noaaport/gdas/</a></div><div> <a href="https://mageval.ncep.noaa.gov/" target="_blank">https://mageval.ncep.noaa.gov</a></div></div><div><br></div><div><br></div><div>Steven Earle</div><div>Production Analyst</div><div>NCEP Central Operations</div></div>
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