Download global forecast for flexpart calc

[Synkevych]

Link: https://www.ncei.noaa.gov/data/global-forecast-system/access/grid-003-1.0-degree/analysis/
There are two folders: analysis and forecast. In general, we use the analysis folder, but if prognosis there is not found we use the forecast folder.

[Synkevych]

Use SUFIX [003 006] to download the most recent forecast data.