I updated my Meteogram viewer yesterday which displays hourly SYNOPSYNOP SYNOP (surface synoptic observations) is a numerical code (called FM-12 by WMO) used for reporting weather observations made by manned and automated weather stations. SYNOP reports are typically mad hourly and consist of groups of numbers (and slashes where data is not available) describing general weather information, such as the temperature, barometric pressure and visibility at a weather station. observations for any period in a 4×5 grid of charts. Some values are straight from the SYNOP, others are derived. I think you’ll agree, there’s a lot of observational and climate information locked up in each humble SYNOP. I’ve tried to graph all possible data types from the observation, the degree of windchill will require some further work😉