[Ncep.nhc.nco_contacts] TSB Morning Rounds - Sun Sep 04, 2016

TSB Admin nhc.tsbadmin at noaa.gov
Sun Sep 4 15:26:01 UTC 2016

Here is today's summary of NHC computer operations:
--- Craig Mattocks



1. Continued problems with the National TCV after canceling TS warnings  
(known software bug in AWIPS that causes the text formatter to fail). While  
assisting Hurricane Specialists in the preparation of the 03Z National TCV,  
TSB Developer Monica Bozeman tried to delete the old expired grids from all  
the SS grids. The product looked correct on the GFE map display (zones were  
no longer highlighted on the map), but the text product did not incorporate  
the cancellations from MD/VA zones 17-75. She transmitted it anyway to meet  
the product delivery deadline. Later, at 11 PM EDT, TSB AWIPS SysAdmin  
Chris Mello was able to successfully compose and transmit a National TCV  
that incorporated canceled watches/warnings.

2. The cone graphic for Intermediate Advisory 25A (2:00 PM Saturday, Sept.  
3) incorrectly identifed Hermine as a Tropical Depression, instead of a  
Post-Tropical Cyclone (PTC). Apparently, this is the first time a PTC had  
occurred in an intermediate advisory. TSB Developer Matt Sardi discovered  
that the GEMPAK code reads the 2-character storm type from the TCM  
(Forecast Advisory) for regular advisories, but reads the storm type from  
the TCP (Public Advisory) for intermediate and special advisories.

The Fortran source code (in  
nawips at nhc-lx-comp01:/nhc/nawips/7.3.0/gempak/source/cgemlib/gh) had been  
updated for special advisories (ghrdhd.f) to handle the Post-Tropical/PT  
type, but it seems the intermediate code (ghpuhd.f) was overlooked during  
the upgrade process. Matt fixed the text parsing code in ghpuhd.f,  
recompiled and deployed GEMPAK, and the 8 PM version of the cone graphic  
was rendered correctly.

3. Early this morning the Atlantic ATCF workstation was running in a very  
sluggish manner. Senior Hurricane Specialist Stacy Stewart rebooted the  
machine. The system ran a lot faster/more efficiently afterwards.
Other items:
1. Potential Storm Surge Flooding graphic: As Hermine transitioned to a  
post-tropical cyclone, the SSU switched from using the P-surge model, which  
employs a parametric tropical cyclone wind model, to the P-ETSS  
(Probabilistic Extratropical Storm Surge) model, in which the (gridded)  
wind forcing is provided by the GFS ensemble system, to generate a more  
realistic depiction of the storm surge threat.

Following a 1400Z (10 AM EDT) conference call, NCEP Director Bill Lapenta  
requested that MDL and NHC be provided with immediate access to resources  
on the WCOSS supercomputing clusters to run the P-ETSS model. IDSB Chief  
Becky Cosgrove contacted the model developer, Arthur Taylor. IBM then added  
the mdl.surge group to the devmax and devmax_shared queues on the Cray  
systems (Luna and Surge).

When the resulting inundation graphic based on the P-ETSS input was deemed  
acceptable by NHC Director Rick Knabb and SSU Team Lead Jamie Rhome, TSB  
Developer Monica Bozeman set up a cron script (cron_getPETSS.sh) in the  
arcgis account on NHC's ArcGIS server (nhc-lx-ssu01) to automate the  
downloading of new input files from EMC's http location.

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