Why NWP Forecasts Go Awry
¥All analyses contain errors
¥ Regions with sparse or low quality observations
¥ - Oceans have ÒpoorerÓ data than continents
¥ Instruments contain measurement error
¥ - A 20oC reading does not exactly equal 20oC
¥ Even a precise measurement at a point location might not accurately represent the big picture
¥ - Radiosonde ascent through isolated cumulus