Barometric Pressure Forecast for Shinagawa City, Japan
Barometric pressure forecast for Shinagawa City, Japan — on the Tokyo Bay waterfront, much of it built on reclaimed ground. See current barometric pressure and what it means for weather-sensitive people.
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Pressure and weather in Shinagawa City
Shinagawa occupies the low ground where the Musashino terrace drops away to Tokyo Bay, and a large share of the ward east of the old Tokaido road stands on land reclaimed from the water over the past four centuries. Being at sea level on the bay shapes its weather in ways the inland wards do not share. Summer nights are among the warmest in Tokyo, because the heat island effect combines with humid air off the bay and with dense waterfront development that releases stored heat slowly. Typhoon season from August to October brings both the deepest pressure falls of the year, commonly twenty-five to forty hPa as a system tracks up the Pacific coast, and the storm surge risk that reclaimed low-lying ground carries, which is why the bay side is ringed with seawalls and floodgates. The tsuyu front stalls over the region in June and early July with low flat pressure and weeks of grey humidity. Winter is the opposite extreme, dry and clear under the Siberian High, though the bay keeps the ward a degree or two milder than the inland suburbs and turns most would-be snow events into cold rain.
What this means for you
The bay moderates temperature but does nothing to soften a typhoon's pressure fall, the sharpest signal of the year here. Reading a barometric pressure forecast three days out is how most residents plan around it.