[Ncep.nhc.nco_contacts] TSB Morning Rounds - Thu Jun 09, 2016

TSB Admin nhc.tsbadmin at noaa.gov
Thu Jun 9 16:25:47 UTC 2016

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


1. NWPS wind forcing is frozen after 102 hours. TAFB forecasters have been  
generating wind grids with a varying time resolution of 3 hours for the  
first 72 hours of a forecast, then 6 hours thereafter (from 72-156 hours).  
However, the SWAN nearshore wave model expects wind input at a fixed time  
interval so it assumed all data was being provided with a time resolution  
of 3 hours. SWAN was reading through the 6-hourly data beyond 72 hours too  
quickly, applying the wind forcing too soon, exhausting it, then persisting  
the last time frame of wind data throughout the remaining hours of the  

Apparently, there was software in place that automatically interpolated the  
wind grids to constant 1-hour intervals for SWAN but this software is  
currently broken and this functionality cannot be restored until AWIPS II  
is upgraded to version 16.4.1 or higher.

In the interim, WFO Meteorologist in Charge Pablo Santos and WFO  
Information Technology Officer Doug Gaer have devised an innovative  
solution. Forecasters will have to highlight and "fragment" (time  
interpolate) all wind grids beyond 72 hours to make them all 3-hourly prior  
to running the NWPS. After the wind grids have been fragmented, saved, and  
the NWPS has begun running, the wind grids must be recombined beyond 72  
hours using the ConfigureWindTimes procedure.

Lead Forecaster Jeff Lewitsky has tested this procedure, verified that it  
works well, and has written a set of instructions with screenshots (posted  
on the TAFB GFE wiki page) to assist fellow forecasters.
1. Reminder: Unqualified personnel are not allowed to work at operational  
forecast desks or on the ATCF due to security concerns and potential damage  
to the software and databases.
Other items:
1. A WFO Electronic Technicias found an F-type coax connector cut off an  
antenna cable by the roofers because the conduit was too narrow to pull all  
the cables through. Apparently, it is for some sort of send-and-receive  
antenna located on the west side of the building near the air conditioner.  
The El-Tech will consult with Salim Leyva to see if he knows what antenna  
this could be and how this might impact NHC operations.

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