NOGAPS no more
byon 01-24-2013 at 03:09 PM (832 Views)
I commented about it last month, but it was a busy time and at the end of comments of a quickly replaced blog. (Was someone miffed? Nah.)
In tropical weather news, NOGAPS is no more (or soon will be). Replaced by a new model, NAVGEM. Not sure what skill score studies have been done, yet...
Further, this will be the boundary and initial conditions for the NGFDL and COAMPS.
So far, I have not seen any publicly accessible plots of NAVGEM data on the internet. The URLs above are useless to us mere civilians. If you've found some, please share. Presumably there will be some.Customers of the NOGAPS model,
As the science of Numerical Weather Prediction (NWP) has evolved, Naval
Research Lab (NRL) Monterey has been working on a new state of the
science global model to take Navy modeling to the next generation.
Transitioning to the Navy Global Environmental Model (NAVGEM) is already
underway here at Fleet Numerical. In order to ensure the transition is
as smooth as possible for our customers, we are hosting a realtime
NAVGEM data feed available via our beta CAGIPS and METCAST service. We
are making this data available to customers so they can begin testing
software/applications with the NAVGEM data sets to verify this
transition will not negatively impact any processes/applications you may
be running. To further minimize impacts to any of our customer's
downstream applications, the NAVGEM grid resolution and format will
remain the same as the existing NOGAPS data sets; however, the file
names and data subscriptions will change during this transition.
Beta NAVGEM data is available through our SIPR/NIPR beta CAGIPS and
METCAST servers. Please take advantage of this data to run your own
data assimilation testing. Instructions on how to access this data,
examples of the new data headers and a "FAQ"/general information page
are available on FNMOC's NIPR/SIPR webpage:
As the operational transition from NOGAPS to NAVGEM progresses, updated
information (to include updated transition timelines) will be posted to
the web pages (above) and we will periodically send e-mail
notifications/updates to registered CAGIPS and METCAST users.
For your information, all METCAST NOGAPS subscriptions on our NIPR/SIPR
beta systems have already been transitioned to NAVGEM. This transition
was done at the server level and required no intervention from the user.
This same, automatic transition will happen on the operational METCAST
server during the one month transition period. Operational METCAST
users will automatically be switched from NOGAPS to NAVGEM. The date for
transition will be sent later.
To aid CAGIPS users during this transition, FNMOC will automatically
create a new, duplicate subscription for any CAGIPS users who currently
subscribe to NOGAPS grids and replace your NOGAPS datasets with NAVGEM
grids. Please note, the new NAVGEM subscriptions will remain "inactive"
until activated by the user. Once NAVGEM has been promoted to our
Operational system, our CAGIPS customers will be able to receive both
NAVGEM and NOGAPS datasets for approximately one month (DUAL OPS). This
timeframe should allow our Operational CAGIPS users to finalize their
own transition schedule prior to removal of NOGAPS from OPS. Once NOGAPS
is removed from our Operational system, users who haven't transitioned
to their new NAVGEM subscription will cease to receive global NWP data.
If you require a dissemination method other than CAGIPS and METCAST for
your testing, please do not hesitate to contact us. Our goal is to make
this seamless to all Fleet Numerical customers.
Please note: The following output issues have been identified during our
optest and are being addressed:
- Very light precipitation is over predicted
- Cloud type/precipitation mechanism mismatches. We see that the cloud
type and precipitation mechanism are occasionally inconsistent.
(Stable/convective precipitation with no stable/convective clouds)
- CAPE values are 0.
- tropopause level (geopotential height) is not available.
The current dates for transition are:
AVAILABLE NOW - BOTH NAVGEM AND NOGAPS DATA IS CURRENTLY AVAILABLE VIA
FNMOC'S NIPR/SIPR BETA CAGIPS SYSTEMS. METCAST USERS
ONLY HAVE ACCESS TO NAVGEM DATA VIA THE BETA METCAST
FEB 13, 2013 - (DUAL OPS) BOTH NAVGEM AND NOGAPS DATA WILL BE
AVAILABLE TO OPERATIONAL CUSTOMERS ON THE OPS SERVER.
MAR 13, 2013 - TRANSITION FROM NOGAPS TO NAVGEM COMPLETE. NOGAPS
MODEL WILL BE REMOVED FROM OPERATIONS.
After Mar 13, 2013, NOGAPS data will no longer be available on any
system hosted at Fleet Numerical (NIPR OR SIPR).
As well, presumably, the NHC files of vortex track forecasts (the data behind all spaghetti plots, everywhere) will be updated or NAVGEM will simply replace NOGAPS with the same format data under the same code...but I've found no info about that, either.