I'm curious about this as well. From what I can tell (see below), it
looks like there won't be any changes on NOAAPORT after the changeover.
It looks like the new AVN grids will only be available on the FTP site
and we'll see the same output on NOAAPORT (out to 126 and 84 hours).
We'll see the same MRF output at 00Z but after mid April, these will be
derived from the AVN model and not the MRF. I suspect the model
designation will change to AVN in the GRIB file. I'm not sure if
they'll send out a second batch of AVN(MRF) grids at 12Z (or
intermediate hours).
-----------------------------------------------------------
2002/02/28
DM02-02.15 -UPCOMING CHANGES TO THE NCEP GLOBAL FORECAST SYSTEM
NOXX10KWBC 281241
DATA MGT MESSAGE 02-02.15
TO AWIPS/NOAAPORT USERS... FAMILY OF SERVICES /FOS/
SUBSCRIBERS EMERGENCY MANAGERS WEATHER INFORMATION
NETWORK /EMWIN/NATIONAL WEATHER SERVICE /NWS/
CUSTOMERS... WAFS USERS... GTS USERS... NWS FAX CHART USERS
FROM RTH WASHINGTON DATA MANAGEMENT
SUBJECT UPCOMING CHANGES TO THE NCEP GLOBAL FORECAST
SYSTEM
IN LATE WINTER AND SPRING OF 2002... NCEP WILL BE MAKING
SEVERAL CHANGES TO ITS GLOBAL FORECAST SYSTEM /GFS/. THE
NCEP GFS INCLUDES THE MRF... THE AVN... AND THE GLOBAL DATA
ASSIMILATION SYSTEM /GDAS/... WHICH IS ALSO KNOWN AS THE
FNL.
CURRENTLY THE MRF RUN OF THE GFS IS RUN ONCE PER DAY
AT 00 UTC. THE RESOLUTION OF THE MRF IS T170L42 /75
KM HORIZONTAL/ OUT TO 168 HOURS AND T62L28 /210 KM
HORIZONTAL/ RESOLUTION FROM 180 TO 384 HOURS. OUTPUT ARE
MADE AVAILABLE FROM THE MRF IN 12-HOUR INCREMENTS. THE
AVN RUN OF THE GFS IS CURRENTLY RUN FOUR TIMES PER DAY AT
T170L42 RESOLUTION. AT 00 AND 12 UTC THE AVN PRODUCES
FORECAST OUT TO 126 HOURS AND AT 06 AND 18 UTC IT PRODUCES
FORECASTS TO 84 HOURS. ALL FOUR RUNS OF THE AVN PRODUCE
OUTPUT IN 3-HOUR INCREMENTS. THE GDAS RUN OF THE GFS IS
RUN FOUR TIMES PER DAY AT BOTH T170L42 AND T62L28
RESOLUTIONS AND PRODUCES A NINE HOUR FORECAST THAT IS
USED AS INPUT INTO THE NEXT RUN OF THE AVN AND FNL.
THE FIRST CHANGE TO THE NCEP GFS HAS BEEN TENTATIVELY
SCHEDULED FOR 5 MARCH 2002. ON THIS DATE THE LENGTH OF
ALL FOUR RUNS OF THE AVN WILL BE INCREASED TO 384 HOURS.
THESE RUNS WILL BE MADE AT T170L42 RESOLUTION OUT TO 180
HOURS WITH OUTPUT IN 3-HOUR INCREMENTS. FROM 192 TO 384
HOURS THE RESOLUTION OF THESE RUNS WILL BE REDUCED TO
T62L28 WITH OUTPUT IN 12-HOUR INCREMENTS. THERE ARE
CURRENTLY NO PLANS TO DISSEMINATE THESE ADDITIONAL DATA
ANYWHERE EXCEPT FOR THE NWS AND NCEP FTP SERVERS. PLEASE
NOTE THAT THIS IMPLEMENTATION WILL NOT CHANGE ANY OF THE
EXISTING AVN PRODUCTS ALREADY BEING DISSEMINATED FROM
NCEP.
AFTER THIS IMPLEMENTATION THE NEXT CHANGE TO THE NCEP GFS
IS TENTATIVELY SCHEDULED FOR 23 APRIL 2002. ON THIS DATE THE
MRF RUN WILL BE DISCONTINUED. NCEP WILL CREATE AND
DISSEMINATE MRF LOOK ALIKE GRIB FILES FROM THE 00 UTC AVN
RUN. THESE LOOK ALIKE GRIB FILES WILL BE CREATED FOR
APPROXIMATELY 6 MONTHS WHICH WILL ALLOW USERS OF THESE
PRODUCTS TIME TO TRANSITION TO THE EXTENDED AVN RUNS.
NCEP WILL MAKE THESE LOOK ALIKE GRIB FILES AVAILABLE
UNDER TEST DIRECTORIES ON THE NWS AND NCEP FTP SERVERS
SHORTLY AFTER THE EXTENSION OF THE AVN IS IMPLEMENTED
ON 5 MARCH 2002.
FINALLY... PENDING CAFTII APPROVAL IN MARCH 2002... THE
RESOLUTION OF THE GFS WILL BE INCREASED TO T256L64 /55 KM
HORIZONTAL/ RESOLUTION. THIS IMPLEMENTATION DATE HAS
BEEN TENTATIVELY SCHEDULED FOR SOMETIME IN MAY 2002.
MORE DETAILS ON THIS IMPLEMENTATION WILL BE FORTHCOMING
AFTER CAFTII APPROVAL.
NCEP APPRECIATES YOUR PATIENCE AS WE TRANSITION TO A
BETTER GFS.
FOR FOS/NOAAPORT AND NON-AWIPS CUSTOMERS - IF YOU HAVE
ANY QUESTIONS REGARDING THIS NOTICE... PLEASE CONTACT
DATA MANAGEMENT
LOWER CASE
EMAIL NWS.DM/AT SYMBOL//NOAA.GOV
THIS INFORMATION IS ALSO POSTED ON THE NWS DATA
MANAGEMENT CHANGE NOTICES WEB PAGE THE URL IS LISTED
BELOW
HTTP/COLON///WWW.NWS.NOAA.GOV/DATAMGMT/NOTICES.SHTML
DATA MANAGEMENT TELECOMMUNICATION OPERATIONS CENTER
RTH WASHINGTON SENDS
________________________________________________________
Daniel Vietor Mail: devo@xxxxxxxxxxxxx
Unisys Corp Title: Engineer/Meteorologist
221 Gale Lane Phone: 610-925-5206
Kennett Square PA 19348 Fax: 610-925-5215
> -----Original Message-----
> From: owner-ldm-users@xxxxxxxxxxxxxxxx
> [mailto:owner-ldm-users@xxxxxxxxxxxxxxxx]On Behalf Of Bryan Rockwood
> Sent: Monday, March 04, 2002 1:33 PM
> To: ldm-users@xxxxxxxxxxxxxxxx
> Subject: Expanded AVN Availability
>
>
> Hello all,
>
> Curious if anyone knows whether the new AVN grids out to 384 will be
> available through NOAAPort anytime soon. Any ideas? I would
> assume that
> since it is run four times a day out that far, the amount of
> data on the
> stream would need to be tested first, but was curious if
> there was a time
> table since it is replacing the MRF in April. (The MRF will
> still be sent
> out, but it will be the AVN data)
>
> Bryan
>
> ********************
> Bryan Rockwood: rockwood@xxxxxxxxxxxxx
> System Administrator, Creighton University, Atmospheric Sciences
> "I drank what?!" -- Socrates
> ********************
>
