New ECMWF monthly forecast files: mismatch between P1, P2 values and forecast times

[Christian Marquardt]

On March 11, ECWMF introduced a modified version of their model system;
their websites
mentions

The main changes in this revision are:
>
>    - Use of persisted SST anomalies in all atmospheric forecasts
>    - Daily ocean-coupling of days 10 to 15 of 0000 UTC EPS forecasts
>    - Monthly Forecast run once per week from 0000 UTC on a Thursday as
>    an extension of the 15 day EPS forecast from this base time
>    - Modified EFI products using the new unified re-forecasts
>    - New GRIB description for all Monthly Forecast products, analogous
>    to the current medium-range EPS data
>
> Maybe you stumbled across the last point? I do not know the details of the
changes, though... and I don't know the details. Oh, they also say

> The new GRIB model identifiers are: 131 (atmospheric model). Model numbers
> for the Global wave model will remain at 116. Also for the European waters
> wave model the number will remain 216.
>

I don't know - would the change of the model identifier require a new grib
table in wgrib? Anyway, at least you now know that something did change on
the ECMWF side...

  Christian.







On Wed, Mar 19, 2008 at 10:42 PM, Eduardo Sierra <edmasi at fibertel.com.ar>
wrote:

>  Dear Daniele:
>
> I am not able to find the ECMWF monthly forecast files.
>
> Can you tell me in which url are they stored.
>
> Thank You
>
> Eduardo
>
> ----- Original Message -----
> *From:* Daniele Gandini <Daniele.Gandini at ARPA.PIEMONTE.IT>
> *To:* GRADSUSR at LIST.CINECA.IT
> *Sent:* Wednesday, March 19, 2008 8:51 AM
> *Subject:* New ECMWF monthly forecast files: mismatch between P1, P2
> values and forecast times
>
> Dear GrADS users,
>
> I gave a more accurate look to new ECMWF monthly forecast files.
>
> I notice a mismatch between P1, P2 and the forecast times:
>
> wgrib EMEMO1500_20080313_011_032.grb
> 1:0:d=08031300:Z:kpds5=129:kpds6=100:kpds7=500:TR=3:*P1=16:P2=44*:TimeU=11:500
> mb:*96-264hr* ave:NAve=14
>
> P1 would have to be equal to 96 and P2 to 264, right? Or no?
>
> In old files there wasn't this mismatch:
>
> wgrib EMEMO1500_20080306_011_032.grb
> 1:0:d=08030600:Z:kpds5=129:kpds6=100:kpds7=500:TR=3:*P1=5:P2=11*:TimeU=2:500
> mb:*5-11d* ave:NAve=14
>
> Perhaps it could be the missing display cause, but I don't know really.
>
> Thank you in advance.
>
> Daniele
>
> Daniele Gandini
> ARPA Piemonte
> Servizio Meteorologico
> http://www.arpa.piemonte.it
>
>
>
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