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Re: NAM 218 grid *LINK*

Posted By: Kevin Brundage
Date: 24-November-09 1545Z

In Response To: NAM 218 grid (Phanindra)

Here is the information from Office note 388 describing the WMO grib format: VALUE - 218 (B)[b] GRID DESCRIPTIONS - Grid over the Contiguous United States (used by the 12-km Eta Model) (Lambert Conformal) Nx 614 Ny 428 La1 12.190N Lo1 226.514E = 133.459W Res. & Comp. Flag 0 0 0 0 1 0 0 0 Lov 265.000E = 95.000W Dx 12.19058 km Dy 12.19058 km Projection Flag (bit 1) 0 (not bipolar) Scanning Mode (bits 1 2 3) 0 1 0 Lat/lon values of the corners of the grid (1,1) 12.190N, 133.459W (1,428) 54.564N, 152.878W (614,428) 57.328N, 49.420W (614,1) 14.342N, 65.127W Pole point (I,J) (347.668, 1190.097) The Dx, Dy grid increment (at 25 deg north) was selected so that the grid spacing would be exactly 12.000 km at 35 deg north; the intersection of 35N & 95W falls on point (347.668, 160.999) Note: ON388 is quite old, and has undoubtedly been updated, but is still correct.

http://www.rhinocerus.net/forum/lang-idl-pvwave/119756-map-parameters-eta-nam-model.html

Messages In This Thread

NAM 218 grid -- Phanindra -- 24-November-09 0151Z

ADMIN! Re: NAM 218 grid *LINK* -- Kevin Brundage -- 24-November-09 1545Z

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