I’m still working on getting a proper map with the exact delineation of the appellation but the below Google map shows the general area where COF is located. The majority of production is centered around Cividale del Friuli (where the producers association is located) and the appellation extends north in a narrow strip aligned with the pre-Alps. But, more importantly, the relief map below shows the violent jump in elevation at the foot of the Carnic and Julian Alps.
This unique geographic formation creates an intense and often violent wind corridor. Did you know that there are handrails in parts of Trieste that help pedestrians negotiate the winds when they get too strong? While cold air arrives from the Alps, warmer air can arrive from the Adriatic, creating a series of macroclimates that can be warmer or cooler depending on the position.