What does a "No Travel Advised" mean in South Dakota?

SDDOT is telling you that plows have been pulled and rescue may not be possible. It is not a legal closure, but the interstate is functionally impassable. This page shows NWS Blizzard and Winter Storm Warnings on the route, which usually precede the advisory.

I-90 · SD

I-90 across South Dakota: road conditions right now

Sioux Falls, SD to Rapid City, SD

I-90 across South Dakota is 350 miles of open prairie with nothing to stop the wind. Blizzards with 60 mph gusts and zero visibility close it from Chamberlain to Wall several times a winter, and the state advises "No Travel" on the whole interstate in the worst storms.

Checking the forecast, NWS alerts, and DOT feeds for I-90 right now…

Why this stretch is hard in winter

Whiteout is the hazard: even light snow becomes zero visibility in a 50 mph wind.
The Missouri River crossing at Chamberlain and the Kadoka–Wall stretch are the usual closure points.
Services are 30 to 60 miles apart; a closure can leave you at a gas station for the night.
Ice storms south of I-90 push up from Nebraska in early winter and glaze the road with no snow.

What this page checks

Hourly forecast at every checkpoint for the time you would be there: temperature, precipitation type and rate, gusts, visibility.
Active National Weather Service watches, warnings, and advisories on the route.
Snow on the ground (NOAA SNODAS) and the Weather Prediction Center winter impact outlook.
Pavement temperature and surface state from state DOT road sensors, when you are leaving within a few hours.
Chain controls, closures, and winter road condition reports from state DOT feeds where they are published openly.
Seasonal closures of mountain roads the router might otherwise use.

Official sources for this corridor

Questions drivers ask about I-90

What does a "No Travel Advised" mean in South Dakota?: SDDOT is telling you that plows have been pulled and rescue may not be possible. It is not a legal closure, but the interstate is functionally impassable. This page shows NWS Blizzard and Winter Storm Warnings on the route, which usually precede the advisory.

Conditions change by the hour. This page is a planning aid built on public forecasts and DOT feeds; the road authority linked above has the final word on closures and chain requirements.

Other corridors: I-80 across Wyoming · I-70 through the Colorado mountains · I-80 over Donner Pass · I-90 over Snoqualmie Pass · I-84 through the Blue Mountains · I-15 over Cajon Pass · all corridors