Welcome to the NOAA Institutional Repository | New grid-scale precipitation package in the -NMC nested grid model - :11553 | National Weather Service (NWS)
Stacks Logo
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.
 
 
Help
Clear All Simple Search
Advanced Search
New grid-scale precipitation package in the -NMC nested grid model
  • Published Date:
    1982
Filetype[PDF - 1.74 MB]


Details:
  • Personal Authors:
  • Corporate Authors:
    National Meteorological Center (U.S.)
  • Series:
    Office note (National Centers for Environmental Prediction (U.S.)) ; 251
  • Document Type:
  • Description:
    "A challenge in the operational numerical modeling of grid-scale precipitation is the incorporation of the fact that such precipitation occurs in nature on a spatial scale much less than that resolvable by the forecast models. That is, this nonconvective precipitation can occur in nature in a volume represented by a grid point in a forecast model even when the mean relative humidity of that volume is less than 100%. Currently this possibility is treated in NMC's operational Limited-area Fine-mesh Model (LFM) and Movable Fine-mesh Model (MFM) by reducing the definition of saturation to less than 100%, say 90%. Alternate methods have been proposed by Mathur (personal communication), Gerrity (1981), and Phillips (1981). This paper briefly reviews the method for grid-scale condensation in the LFM and MFM and the one proposed by Phillips (1981). Results of experiments incorporating the two techniques in NMC's Nested Grid Model (NGM) will be discussed"--Introduction.

  • Supporting Files:
    No Additional Files