EMC Non-Operational NOMADS: EMC Server 1 Nomad1

Description of NOAA's NOMADS servers hosting NCEP model data

Plots, Data, Points of Contact


last update to this web page:20060822

The following table list several data sets. By clicking on the appropriate command, you can (1) make plots, (2) FTP the files to your computer -- slice, dice and subset large files or (3) obtain documentation or (4) use the DODS(OPeN-DAP)/GDS server to get data values directly from our matrix of holdings. At this time, some options are not available (N/A).

Data Set freq plot ftp http doc gds contact 1 contact 2
Coupled Forecast System Reanalysis (CFSR)
CFSR pressure level, 2.5 x 2.5 deg monthly plot grib-filter http doc N/A Wesley.Ebisuzaki@noaa.gov Leigh.Zhang@noaa.gov
CFSR flux, T62 Gaussian grid monthly plot grib-filter http doc N/A Wesley.Ebisuzaki@noaa.gov Leigh.Zhang@noaa.gov
CFSR level, 0.5 x 0.5 deg monthly plot grib-filter http doc N/A Wesley.Ebisuzaki@noaa.gov Leigh.Zhang@noaa.gov
experimental CFSR precipitation model Gaussian grid 1 hour plot N/A http doc N/A Wesley.Ebisuzaki@noaa.gov Leigh.Zhang@noaa.gov
experimental CFSR 2 m temperature model Gaussian grid 2010+ 1 hour plot N/A http doc N/A Wesley.Ebisuzaki@noaa.gov Leigh.Zhang@noaa.gov
experimental CFSR surface downward short-wave rad. flux, model Gaussian grid 2010+ 1 hour plot N/A http doc N/A Wesley.Ebisuzaki@noaa.gov Leigh.Zhang@noaa.gov
experimental/RFC CFSR plant hardiness zones (35km) climatology plot N/A http doc DODS Wesley.Ebisuzaki@noaa.gov Leigh.Zhang@noaa.gov
experimental/RFC CFSR #days/year >= 30C, heat zone (35km) climatology plot N/A http doc N/A Wesley.Ebisuzaki@noaa.gov Leigh.Zhang@noaa.gov
experimental/RFC CFSR growing degree days, Tbase=10C Tmax=30C not real-time yet plot N/A http doc N/A Wesley.Ebisuzaki@noaa.gov Leigh.Zhang@noaa.gov
NCEP/DOE Reanalysis (Reanalysis-2)
Reanalysis-2 pressure level 4x daily plot ftp2u ftp http doc DODS Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
Reanalysis-2 non-pressure level 4x daily plot ftp2u ftp http doc DODS Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
Reanalysis-2 spectral sigma analyses 4x daily N/A ftp http doc N/A Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
Reanalysis-2 sfcanl (to run model) 4x daily N/A ftp http doc N/A Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
Reanalysis-2 pressure level monthly mean plot ftp2u ftp http doc DODS Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
Reanalysis-2 non-pressure level monthly mean plot ftp2u ftp http doc DODS Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
Reanalysis-2 diabatic heating etc monthly mean plot ftp2u ftp http doc DODS Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
NCEP/DOE Reanalysis (Reanalysis-2) Rotating Archive, latest analyses
Reanalysis-2 pressure level 4x daily rotating plot ftp2u ftp http doc DODS Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
Reanalysis-2 non-pressure level 4x daily rotating plot ftp2u ftp http doc DODS Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
Reanalysis-2 model init conditions 4x daily rotating N/A ftp2u ftp http doc DODS Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
CDAS-NCEP/NCAR Reanalysis
N/N Reanalysis pressure level 4x daily plot ftp2u ftp http doc DODS Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
N/N Reanalysis non-pressure level 4x daily plot ftp2u ftp http doc DODS Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
N/N Reanalysis spectral sigma analyses 4x daily N/A ftp http doc N/A Wesley.Ebisuzaki@noaa.gov
N/N Reanalysis sfcanl (to run model) 4x daily N/A ftp http doc N/A Wesley.Ebisuzaki@noaa.gov
N/N Reanalysis pressure level monthly mean plot ftp2u ftp http doc DODS Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
N/N Reanalysis Gaussian grid non-pressure level monthly mean plot ftp2u ftp http doc DODS Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
N/N Reanalysis lat-lon non-pressure level monthly mean plot ftp2u ftp http doc DODS Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
N/N Reanalysis rotating 4x daily plot ftp http doc N/A Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
N/N Reanalysis rotating daily mean plot ftp http doc N/A Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
N/N Reanalysis obsevation counts monthly mean plot ftp http N/A N/A Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
GDAS: FNL Operational Analysis (real time)
GDAS (FNL) analyses 4x daily rotating plot ftp2u http N/A DODS Wesley.Ebisuzaki@noaa.gov Jun.Wang@noaa.gov
experimental/RFC GDAS growing degree days, Tbase=5.5C Tmax=30C daily plot N/A http doc N/A Wesley.Ebisuzaki@noaa.gov Leigh.Zhang@noaa.gov
experimental/RFC GDAS growing degree days, Tbase=8C Tmax=30C daily plot N/A http doc N/A Wesley.Ebisuzaki@noaa.gov Leigh.Zhang@noaa.gov
experimental/RFC GDAS growing degree days, Tbase=10C Tmax=30C daily plot N/A http doc N/A Wesley.Ebisuzaki@noaa.gov Leigh.Zhang@noaa.gov
Climate Monitoring (real time)
SST (Reynolds) weekly/monthly means plot ftp2u / ftp http N/A N/A Diane.Stokes@noaa.gov Wesley.Ebisuzaki@noaa.gov
OLR monthly means plot ftp http N/A N/A Wesley.Ebisuzaki@noaa.gov
OLR pentad means plot ftp http N/A N/A Wesley.Ebisuzaki@noaa.gov
OLR anomalies pentad means plot ftp http N/A N/A Wesley.Ebisuzaki@noaa.gov
CAMS-OPI precipitation monthly plot N/A N/A N/A N/A Wesley.Ebisuzaki@noaa.gov
Forecasts
GFS High Resolution (rotating) 6 hours plot ftp2u http doc DODS Jordan.Alpert@noaa.gov Wesley.Ebisuzaki@noaa.gov
GFS High Resolution (2 month archive) 6 hours plot ftp2u http N/A DODS Jordan.Alpert@noaa.gov Wesley.Ebisuzaki@noaa.gov
GFS High Resolution (0.5 degree, 1 week) 6 hours plot ftp2u http N/A DODS Jordan.Alpert@noaa.gov Wesley.Ebisuzaki@noaa.gov
GFS Low Resolution (2 month archive) 1 day plot ftp2u http N/A DODS Jordan.Alpert@noaa.gov Wesley.Ebisuzaki@noaa.gov
NAM (WRF-NMM) 6 hours plot ftp2u http doc DODS Jordan.Alpert@noaa.gov Jun.Wang@noaa.gov
SPC4 12 hours plot ftp2u http doc DODS Jordan.Alpert@noaa.gov Jun.Wang@noaa.gov
NAM_Alaska (not updating) 6 hours plot ftp2u http doc DODS Jordan.Alpert@noaa.gov Jun.Wang@noaa.gov
SREF 12 hours plot ftp2u http N/A DODS Jordan.Alpert@noaa.gov Jun.Wang@noaa.gov
RSM 1 month plot ftp2u http N/A DODS Henry.Juang@noaa.gov Jun.Wang@noaa.gov
RTOFS_Atlantic_NATIVE_DAILY 24 hours plot ftp2u http N/A DODS Jordan.Alpert@noaa.gov Jun.Wang@noaa.gov
RTOFS_Atlantic_NATIVE_HOURLY 1 hour plot ftp2u http N/A DODS Jordan.Alpert@noaa.gov Jun.Wang@noaa.gov

Definitions and Links

GFS(AVN) Aviation run, now called GFS Global Forecast Model
CDAS Climate Data Assimilation System (Reanalysis), Global T62 Reanalysis model
CAMS Climate anomaly monitoring system
CERES NASA Cloud and Earth Radiant Energy System
CMB Climate modeling branch (EMC)
CMF Coupled model forecast
CPC Climate Prediction Center
EMC Environmental Modeling Center
ERBE NASA Earth Radiation Budget Experiment
ETA high resolution regional model
FNL final analysis, used as initial conditions for the GFS(AVN) and GFS(MRF)
GDAS Global Data Assimilation System, global T126 operational model
GRIB WMO standard for encoding gridded fields
ISCCP International Satellite Cloud Climatology Project
LaRC NASA Langley Research Center
GFS(MRF) Medium Range Forecast, Global operational Forecast System, run at 00Z
MMAB Marine Modeling and Analysis Branch (EMC)
NAM North American Mesoscale
NCEP National Centers for Environmental Prediction, part of NWS
NGM Nested Grid Model, an older regional model
NMM Nonhydrostatic Mesoscale Model
NVAP NASA Water Vapor Project
NWS National Weather Service, part of the Department of Commerce
OI Optimal interpolation
OLR Outgoing Long-wave Radiation
OMB Ocean Modeling Branch (EMC)
PATMOS/CLAVR Pathfinder Atmospheric data/Cloud from AVHRR
RFC Request For Comments (because of the experimental nature)
RTOFS Real-Time Ocean Forecast System (old AOFS) model
SST Sea surface temperature
TOA Top of atmosphere
TRMM NASA Tropical Rainfall Measurement Mission
WRF Weather Research & Forecasting

Fair Share

Some users apparently don't understand computers. Certain users have overloaded the computer by making a hundred requests at one time. Our software sees that a hundred jobs are running rejects all hundred requests. The user's software sees that all the requests were rejected instantly sends off another hundered requests. His hundred requests come faster than the web server can remove the old jobs and the system eventually crashes. As a bandaid, a 10 second delay was added to the "reject" message. Consequently we only had to reject a 100 requests every 10 seconds. The system didn't crash but the a few users were making the system difficult to use for everybody else.

After many attempts of trying to tune the application software, a different tack was taken. Not nice people had their IP addresses turned off by the firewall for upto five minute at a time. Reasons to get rejected are,

  1. Too many bad requests - 404 missing file (10/minute)
  2. Too many ftp2u requests (10/minute)
  3. Too many hits (100/minute)
  4. Too many bytes transferred (50,000,000 bytes / minute)

The limits are per IP address and the limits will decrease when the machine gets too busy. Have noticed some attempts to get around the limits by using multiple IP addresses. Not a good idea.

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The NWS would like to be acknowledged when the above data/plots are published.
Plots created using GrADS

comments, suggestions: Wesley.Ebisuzaki@noaa.gov