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The Climate Analysis Center (CAC) of the U.S. National Meteorological Center (NMC) produced gridded analyses of temperature and wind in the atmosphere by combining the operational tropospheric analyses from NMC and radiosonde and rocketsonde observations in the stratosphere. Grids are available at mandatory pressure levels from 1000 mbar up to 0.4 mbar. Additionally, total-column ozone and longwave radiation are also included. Global coverage is achieved by combining the grids for the northern …

The Final (FNL) global tropospheric analyses archived here were produced by NCEP's Global Forecast System (GFS), which was run operationally at 12-hour intervals to make multiple-day weather forecasts, from July 1976 through mid-April 1997. FNLs are analyses that are produced after the model has completed the forecast cycle, and they include the most complete set of observations available for a given cycle. The FNL from a given cycle, which is the best available analysis, is then used in…

This dataset contains twice daily gridded Northern Hemisphere analyses from NCEP's operational model on 47-by-51 and 65-by-65 polar-stereographic grids centered on the North Pole. Available parameters include geopotential height, temperature, stream functions, thickness, and vertical velocity for various levels and layers through the troposphere. NCEP prepared the 65-by-65 analyses, and were an advancement over the 47-by-51 "B3" analyses. Later NCEP made global analyses, from which the 65-by-6…

ECMWF reanalyses of the FGGE Special Observation Periods (SOP: 10 January 1979 to 05 March 1979 and 05 May 1979 to 31 July 1979) based on FGGE IIIb, 1985 version. No plans to do the rest of the FGGE year (as of April 1989). These are the 1986Dec versions of the analyses, and are the initialized grids.

Satellite radiance information was used to produce a "first guess" of the geopotential height and temperature fields at the 5 mbar, 2 mbar, and 0.4 mbar stratospheric levels, and available rocketsonde data was used to adjust the fields through an objective analysis procedure. The 65-by-65 polar-stereographic grids cover the Northern Hemisphere and are available weekly (on Wednesdays) from July 1976 through April 1980 for the months of January, April, July, and Octob…

ECMWF global analyses collected for ALPEX for the Spring of 1982.

This collection contains gridded and spectral analyses for the First Global Atmospheric Research Program Global Experiment (FGGE) Special Observing Periods. The gridded data include tropospheric analyses of numerous parameters, and 2D and 3D model and heating diagnostics. The spectral data include surface topography and other parameters at various sigma levels.

The former Techniques Development Laboratory (TDL) of the U.S. National Weather Service began collecting Manually-Digitized Radar (MDR) data in November 1973 from teletype reports for the eastern two-thirds of the United States. In 1978, TDL began archiving the MDR on a new grid aligned with the output grid of the Limited Fine Mesh (LFM) model, which was the model used for numerical weather prediction at the time. The new MDR archive covered the entire conterminous United States. As with the ol…

This dataset contains the Limited Fine Mesh (LFM) model output from NCEP. The output contains initial time analyses and forecast fields from 6 hours out to 48 hours. These grids are no longer being produced by NCEP. The December, 1995 data is the last data we will archive from the LFM model.

NCEP Global Tropospheric Analyses on 2.5 degree grids, one for each hemisphere, from 1 July 1976 to 12 April 1997. The Flattery analysis method was used through 21 September 1978. It forced a relationship between heights and winds which causes the zonal mean meridional wind at every level to be zero. This also caused other problems with winds in equatorial areas. The optimal analysis (OI) method (12 layer) started on 22 September 1978. In April 1985 the Medium Ra…