[Met_help] point stat definitely won't use multiple forecast files?

[John Halley Gotway]

Mike,

Grid-Stat and Point-Stat are meant to be run to do verification over a user-defined area at a single valid time.  Their output STAT files can be aggregated using the STAT-Analysis tool to aggregate
performance through time.

John

Shaw, Michael J CTR USAF AFWA 16 WS/WXE wrote:
> Hi John.
> 
> So, point stat is for statistics are over space, not time?  I hadn't used it before, so assumed it was for timeseries.  That would be useful, I'd think.  I.e., error for a point, or for several points.  Am I missing something?  I'd think there'd be a timeseries utility here - verifying through time relative to stations.
> 
> Thanks,
> Mike
> 
> -----Original Message-----
> From: John Halley Gotway [mailto:johnhg at ucar.edu] 
> Sent: Thursday, May 06, 2010 11:09 AM
> To: Shaw, Michael J CTR USAF AFWA 16 WS/WXE; met_help
> Subject: Re: point stat definitely won't use multiple forecast files?
> 
> Mike,
> 
> Yes, that's correct.  Point-Stat is designed to verify a single valid time.  Currently, you have to split up your forecast files into separate files, one for each valid time.  That design is based on
> how WRF typically outputs separate files for each valid time.  However, we've received feedback that some users have multiple forecast times in a single file.  We're planning to add command line
> options to the MET tools to allow you select out the valid time (or lead time) you'd like to verify.  For example,
> 
> point_stat fcst_file.grib obs_file.nc PointStatConfig -valid 20100506_120000
> 
> Would select out only GRIB records valid at that time.  Does that addition sound like it'd meet your needs?
> 
> Thanks,
> John
> 
> Shaw, Michael J CTR USAF AFWA 16 WS/WXE wrote:
>> The way it looks, and I think you confirmed this in an email.  Just want to make sure I'm not missing something.  It seems as though it would/should, since often times forecasts output for multiple cycle times...and it seems to use multiple obs files with an optional flag.
>>
>> ______________________________________________
>>
>> Michael Shaw, Contractor
>> SAIC/NASA Support Scientist
>> michael.shaw.ctr at offutt.af.mil
>> 16WS Environmental Characterization
>> HQ AFWA-SAIC
>> 101 Nelson Drive
>> Offutt AFB, NE 68113-1023
>> 402-232-7690 Comm * 402-272-7690 DSN * 402-294-8230 Fax
>>
>>