In regards to SHF5, which is the SHIFOR5, 5 day version of SHIFOR:
"Similar to the CLIPER track model, the SHIFOR (Statistical Hurricane Intensity Forecast model) is used as a
"no-skill" intensity change forecast. It is a multiple regression statistical model that best utilizes the persistence of the intensity trends and also incorporates climatological intensity change information (Jarvinen and Neumann 1979). SHIFOR has been difficult to exceed until recent years."
From:
http://www.aoml.noaa.gov/hrd/tcfaq/F2.htmlAnd while it goes on to say that the model has been rather accurate, I think in this situation, you have to consider the difficulty in predicting what this invest (again an invest as of 0Z) will do.
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I would also like to note that the SHIPS model does something rather odd starting at 108 hours:
ftp://ftp.tpc.ncep.noaa.gov/atcf/stext/ ... _ships.txtLink does not update. Check folder for latest SHIPS output:
ftp://ftp.tpc.ncep.noaa.gov/atcf/stext/You can see the track on the image from SFWMD:
http://www.sfwmd.gov/org/omd/ops/weathe ... orm_96.gifA sudden left turn. So I would question it as well. I would also question it after 48 hours as well.
"The SHIPS model is run using input from the GFS model."
From this page:
http://www.wunderground.com/hurricane/models.aspAnd I don't know for sure, but since "LOST" is noted after 48 hours by "GFS VTEX (KT)" anything after that might be considered questionable. HOWEVER, I am not sure what that is precisely. I'm trying to figure it out. I would assume GFS Vorticity (in knots) and that the model can't find any spin after that. But once again I don't know for sure on that point.