Barometric Pressure Forecast for Mumbai, India
Barometric pressure forecast for Mumbai, India — on the Arabian Sea at the western edge of the Konkan coast, with the Western Ghats rising inland. See current barometric pressure and what it means for weather-sensitive people.
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Pressure and weather in Mumbai
Mumbai occupies a group of joined and reclaimed islands at sea level on the Konkan coast, backed by the steep escarpment of the Western Ghats some fifty miles inland. At nineteen degrees north the barometer behaves very differently from mid-latitude cities. Day-to-day variation is small for most of the year, because the travelling highs and lows that dominate temperate weather simply do not reach here, and the largest routine feature on a pressure chart is the semidiurnal atmospheric tide, the twice-daily rise and fall driven by solar heating of the upper atmosphere, which is far more pronounced in the tropics than at higher latitudes. The dominant annual signal is seasonal. From June through September the southwest monsoon arrives, drawn in by a broad heat low over northwest India, and mean pressure across the region falls to its yearly minimum and stays there for months while rain arrives in prolonged bursts. The Ghats force that moist onshore flow upward, which is why the Konkan coast is so exceptionally wet. The exceptions to the quiet chart are Arabian Sea cyclones, which cluster in the pre-monsoon weeks of May and June and the post-monsoon weeks of October and November, and which can produce a genuine rapid fall.
What this means for you
Here the barometer moves seasonally rather than daily, apart from the tide and the occasional cyclone. A migraine tracker app that logs continuously will show the twice-daily tidal rhythm clearly at this latitude.