Background information about the characteristics of this data may be
found in An Introduction to Atmospheric and Oceanographic Datasets.
There is general basic information in its Introduction .
More specific information may be found in these chapter(s) or section(s):
Analyzed and Model Data .
Details about the MRF model are
here.
TYPES:
Analyses
Forecast
COVERAGE:
Global
R30
Beginning 1995Dec, on 2.5 deg grid in GRIB
UPDATES:
None
On 23 April 2002 NCEP replaced the 00Z MRF model with the 00Z AVN. Look-alike grids for the MRF were created and disseminated from the 00Z AVN until the fall of 2002, when production stopped. These data had been available on the NCEP ftp server at: ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/mrf/para/ The look-alikes will be discontinued 29 June 2005.
TIMES:
Daily
at 00Z
analysis time plus 20 forecasts at 12-hrly intervals
VARIABLES:
RH through 300mb only
LEVELS:
1000mb 850mb 700mb 500mb 400mb 300mb 250mb 200mb 150mb 100mb 70mb 50mb
Tropospheric levels, Upper air levels, Mandatory levels, Stratospheric levels
FORMAT:
NMC Office Note 85 and GRIB1
Be aware of these processing issues.
MM5, WRF and RAMS users click here.
A little advice is available for: GRIB and GrADs (display) software
VOLUME:
16.6GB estimated total as of 1995may23
COST:
Users with NCAR computing accounts have free access from the NCAR MSS through clicking the 
tab in the navigation bar.
For all others, costs depend on the amount requested, and the DSS standard charging rate applies unless their order qualifies for a substantially reduced charging rate, aka "direct copy rate" as shown on the service charges page.
We can extract a limited variety of subsets from the NCAR MSS files, such as whole grids or whole observations. This may greatly reduce our output charges, but not our input charges. Please inquire, but note that internal logical record reformatting or subsetting is usually not supported.
To send a data request to a staff member, please use this form.
