![GOES_IFR_PROB_20140121loop](http://fusedfog.ssec.wisc.edu/wp-content/uploads/2014/01/GOES_IFR_PROB_20140121loop.gif)
Hourly images of GOES-East IFR Probabilities and surface plots of visibilities/ceilings as well as 3-hourly HPC depictions of frontal positions, 0701 – 1515 UTC on 21 January 2014(click image to enlarge)
Frontal zones are often accompanies by lower visibilities, and the image above shows how IFR Probabilities march steadily eastward as a front marches eastward across the southern Gulf states. Thus, the IFR Probabilities can, at times, serve as a proxy for a frontal zone.