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19990202: gpfront

Jim,

We've noticed NCEP screwing up the time string on the fronts.
The drawing of the pips worked last year for whatever "convention"
they were using at the time. If they decide to change the
"convention", then they should probably put out a change notice
stating what convention they will use. If they change
their convention, then you won't be able to use the program
correctly with archived data, unless there is some way to
discover what convention they are using.

Changing the order of the direction of the line coordinates
will require flipping a sign for the direction of the pips.
Maybe they can provide us with a "correct bulletin".

Steve


On Tue, 2 Feb 1999, Jim Cowie wrote:

> 
> Hey Chiz,
> 
> How's it going? I don't know if you've heard about his yet,
> but NCEP has made some changes in how they generate the ASUS
> bulletins for the fronts. Some of the changes have caused 
> gpfront to draw the warm front pips on the "wrong" side of the
> front. I talked to some NCEP folks, and what they are trying to
> do is standardize the order of the front points so that the pips
> should always be on the left as you go down the line of points. He said
> that right now, the warm front pips are opposite that convention.
> Do you remember it that way? I looked in the code and didn't
> see any comments regarding that.
> 
> For the time being, NCEP has told us they will create the product
> the "old" way, and when we make a change to gpfront and let them
> know, they will start making the bulletins in the new format or
> convention.
> 
> -jim
> 
> -----------------------------------------------------------
> Jim Cowie                              address@hidden
> NWS/UCAR-COMET                         (303) 497 - 8358
> PO Box 3000
> Boulder, CO  80307-3000
> 
>