[Met_help] Wind analysis

[John Halley Gotway]

Joe,

MET treats wind speed as a scalar field just like any other continuous field.  When you request that wind speed be verified (e.g. fcst_field = "WIND/Z2"; for 2-meter wind speed), MET looks in the
input forecast file for wind speed.  If wind speed does not exist in the file, it instead retrieves the corresponding U and V components at that same level and derives wind speed for you.

I'm not entirely clear on exactly how you're using MET, so I can't say for sure how best to add wind speed into your analysis.  One option would be to add wind speed to the list of "fcst_fields" being
verified in Point-Stat.  However, you'll need to make sure that you have wind speed observations available for verifying the forecasts.

But if you're wondering if Stat-Analysis can process VL1L2 lines and dump out stats about errors in wind speed, the answer is no.  It's not currently set up to do that.  However, that certainly does
seem a very logical and straight-forward extension of the functionality.  Would you like to see that type of functionality added to the Stat-Analysis tool, read in VL1L2 lines and dump out statistics
about errors in wind speed similar to how we handle wind direction?

Thanks,
John


Joe Eastman wrote:
> Hello,
> 
> I am in the process of analyzing winds for integrations at several thousand surface stations. I had been using point stat to create the matched pairs and then used statanalysis to do the V1L1 analysis on the wind direction. This is fine for direction but we have no information for wind speed, which in our line of work is the most crucial. Operating on just UGRD or VGRID by themselves is pretty useless. I did not see in the WPP wrf_parm.ctl and option to spit out wind speed. Is there some simple solution to this? Thanks.
> 
> Take care,
> Joe
> 
> Dr. Joseph L. Eastman
> Senior Atmospheric Scientist
> WindLogics Inc.
> 201 4th St NW
> Grand Rapids, MN
> 55744
> 
> c - 410.279.9702
> w - 651.556.4297
> jeastman at windlogics.com<mailto:jeastman at windlogics.com>
> 
> 
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