Forecast Portland is the definitive portal for the Rose City's weather and climate — built to make the official National Weather Service forecast fast, clean, and highway-clear across the seven counties of the Portland–Vancouver metro, from downtown and the east side out to Gresham and the mouth of the Gorge, west across the Tualatin Valley to Hillsboro and Forest Grove, south through Oregon City to Yamhill County's wine country, down the Columbia to St. Helens, and across the river in Washington to Vancouver, Camas and Battle Ground, and up the Gorge to Stevenson.

Portland's weather comes through a gap. The Columbia cuts the only sea-level pass through the Cascades, and almost everything that matters here blows through it: the east wind that turns December rain into an ice storm on the east side, the dry September east wind that drove the 2020 fires, and the cold, clear air that keeps the inversions in. The rest of the year the Pacific owns the city — nine-tenths of the rain between October and May, almost none in July, and every few decades a summer like 2021's heat dome. Forecast Portland is being built to tell that story — county by county, freeway by freeway.

The design language

The look borrows from the American Interstate system — the reflective paper, the green guide signs, the blue service signs, the brown recreation signs, and the red-white-and-blue route shields — set in Overpass, the typeface drawn from the Highway Gothic lettering on those signs. As a metro site its hero is the seven-county grid, in a Rose City red accent for the International Rose Test Garden in Washington Park and the Rose Festival every June, on pale Willamette rain-grey — its own note in the network.

Companions & the network

Forecast Portland is the metro zoom-in for Forecast Oregon. The two are companions — the city and the state — and both are part of the wider Forecast network. Clark and Skamania counties, across the Columbia, are also on Forecast Washington.

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