Global Visibility Guidance Product

This bulletin, prepared by L. D. Burroughs of the Marine Modeling and Analysis Branch (MMAB), Environmental

Modeling Center (EMC), National Centers for Environmental Prediction (NCEP), describes automated global visibility guidance provided in graphic and GRIB formats.

The GFS Global Visibility Guidance will be implemented in early 2004. It is an improvement and extension of the current fog and visibility guidance which covers the northern hemisphere and uses a statistically based system. The guidance runs twice per day at 00 and 12 UTC, provides forecasts out to 3 days at 12-h intervals with outputs in GRIB and image graphics, and is run seasonally from April through September.