The weather on every Interstate, at every exit.
Pick a route and ride it end to end — state by state, exit by exit. Every route below carries its real mile markers and exit numbers (on an Interstate, an exit number is its milepost), with live station conditions along the road and the official NWS forecast one tap away at any interchange.
Take an Exit
The whole rest areaMap Room
The whole network on one canvas — weather-tinted, with live MRMS radar and NWS alert polygons. Scrub seven days ahead.
Plan a Trip
Pick two exits and a departure time. See the weather at each mile when you'll actually be there — and the worst stretch before you hit it.
Mountain Passes
Donner, Vail, Cajon, Snoqualmie — elevation profiles with the freezing level drawn across them, and the summit forecast.
Yesterday on the Freeways
Radar-measured rain at every exit, checked against its normals. What did I-80 at Donner really get last night?
Road Climatology
Thirty years of hourly weather on every mile — the iciest stretches, crosswind alley, and when the sun sits dead ahead.
U.S. Highways
The old roads: 24 routes, 42,196 miles — US-1, US-31, US-50, US-101 and the rest, milepost by milepost, with the same forecast and pavement layers.