I am trying to transform the projection for my data in grib2 format to long/lat, but I'm not sure I'm using the correct EPSG. The data says it uses a "Lambert_Conformal" projection with a WGS84 horizontal datum. Lambert conformal has an EPSG:9802, which crashes my Proj transformation code. I've tried using 3857 for the WGS84, but that doesn't seem to provide correct translations either.
The geotransform is: (-2765744.202231989, 5079.406, 0.0, 3233381.5622923947, 0.0, -5079.406)
Any suggestions on the correct EPSG?