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Hi James, Yes, these models run at different resolutions and update times. Please reference this document from NCEP: http://www.emc.ncep.noaa.gov/mmb/etagrids/ regarding model grid resolution for the ETA and the RUC and: http://sgi62.wwb.noaa.gov:8080/research/mrf.html for the MRF or visit this top link and you will find documenattion regarding all of NCEP's model output: http://www.emc.ncep.noaa.gov/modelinfo/index.html This may also be helpful: It is a snip from our pqact.conf files showing how we seperate out the differing resolutions of model runs.. <snip> # NMC GRIB products # # # NOAAport ETA grids # Grid #211 80km CONUS: ^[YZ].Q.*/mETA # Grid #212 40km CONUS: ^[YZ].R.*/mETA # Grid #215 20km CONUS: ^[YZ].U.*/mETA # Grid #214 47.5km Alaska: ^[YZ].T.*/mETA # Select any/all grids desired from [QRUT] #HRS ^[YZ].[QRUT].*/mETA # PIPE decoders/dcgrib2 -d data/gempak/logs/dcgrib.log # -e GEMTBL=/home/gempak/NAWIPS/gempak/tables # # NOAAport MRF grids # Grid #201 N. Hemisphere 381km: ^Y.A... KWBH # Grid #202 CONUS 190km: ^Y.I... KWBH # Grid #203 Alaska 190km: ^Y.J... KWBH # Grid #204 Hawaii 160km: ^Y.K... KWBH # Grid #205 Puerto Rico 190km: ^Y.L... KWBH # Select any/all grids desired from [AIJKL] #HRS ^Y.[AIJKL]... KWBH # PIPE decoders/dcgrib2 -d data/gempak/logs/dcgrib.log # -e GEMTBL=/home/gempak/NAWIPS/gempak/tables # <snip> so for example: The ETA designated with a "Q" is grid 211 at 80km resolution. Please feel free to write back if this does not answer your questions to your satisfaction. Thank you for using the COMET case study library, -Jeff ____________________________ _____________________ Jeff Weber address@hidden Unidata Support PH:303-497-8676 NWS-COMET Case Study Library FX:303-497-8690 University Corp for Atmospheric Research 3300 Mitchell Ln http://www.unidata.ucar.edu/staff/jweber Boulder,Co 80307-3000 ________________________________________ ______________________ On Wed, 8 Aug 2001, Unidata Support wrote: > > ------- Forwarded Message > > >From: "J. Correia" <address@hidden> > >Subject: comet case 24 > >Organization: FSU > >Keywords: 200108080429.f784Tn105941 COMET CASE STUDY > > i have been using the RUC, ETA and MRF model grids from the 25 January > 2000 comet case and was wondering what the resolution of those model data > sets are. the ruc and ETA both have a 90 something by 65 grid but the ruc > shows far more detail...are the resolutions different on the data sets? > thanks for the help... > james correia jr. > fsu > > > ------- End of Forwarded Message > >