Iowa Interstate 35 Road Conditions: A Milepost Guide

Key takeaways

• 511 Iowa posts every I-35 alert at a milepost, so match the alert number to your exact position rather than the nearest town.
• The blowing-snow corridor on I-35 runs from Ames (about MP 113) past Clear Lake (about MP 194) to the Minnesota line (MP 218), where Minnesota road conditions pick up.
• A closure alert means exit before the posted milepost and reroute, because closed segments rarely reopen on a schedule.
• Iowa has no standing chain law for trucks, but 511 Iowa posts traction advisories during storms on exposed rural stretches.
• Check 511 Iowa before departure, at the Missouri line, and before the I-80 junction, since incident-based alerts expire quickly.

Iowa Interstate 35 road conditions change fastest between Des Moines and the Minnesota line, where blowing snow closes the route and crosswind advisories ground high-profile vehicles. This guide maps 511 Iowa's alert types to specific milepost ranges on I-35, so you and dispatch know which segments close, which only restrict, and when.

How do I check live Iowa Interstate 35 road conditions on 511 Iowa?

Check our live Iowa road conditions map at https://milecheckapp.com/road-conditions/iowa/ (closures by milepost), or 511 Iowa at 511ia.org. 511 Iowa is the primary source for live I-35 conditions because it runs on state DOT feeds, not driver reports. Open 511ia.org, zoom to I-35, and set your route filters to show closures, incidents, restrictions, and weather-related alerts. Every event sits at a milepost, so you can match an alert to your exact position on the interstate. Live Iowa highway cameras are at https://milecheckapp.com/cameras/iowa/. The same data feeds the 511 Iowa mobile app, which shows conditions along your route as you drive.

Reading the 511 Iowa map for I-35

Map symbols follow the alert types the Iowa DOT publishes: red for closures, orange for restrictions and work zones, and yellow for incidents and weather events like wind advisories. Tap any symbol to get the milepost, direction, and start and end points. A closure at MP 118 means exit before it, not after.

Calling 511 when you are already rolling

Dial 511 from any phone and follow the voice prompts to hear closures and incidents by highway. It works in dead zones poorly, so pull the route and milepost before you lose signal. Tools like MileCheck pair those mileposts with a live map for exactly that reason.

What do 511 Iowa alert types actually mean for I-35 drivers?

511 Iowa sorts every alert into a handful of types, and each one demands a different response from a CDL driver. Knowing the label tells you whether to reroute, slow down, or call dispatch before the next milepost.

Closures vs. restrictions vs. incidents

Which alert types should trigger a dispatch call

Closures and restrictions change your route, so dispatch needs them immediately, with the milepost attached. Incidents and weather alerts matter when they sit ahead on your planned segment, not behind. Work zones are predictable enough to pre-plan around, as state holiday traffic recaps like https://milecheckapp.com/blog/labor-day-weekend-recap-2026-states/ show, where closures pile up on peak travel days. MileCheck pairs each alert with its milepost so the number you read off is the number dispatch and DOT crews can act on.

Which segments of I-35 in Iowa get hit hardest by winter weather and blowing snow?

Two stretches account for most winter trouble on I-35 in Iowa: the rolling farmland south of Des Moines, where ice shows up first, and the open prairie north of Ames, where blowing snow closes the road. Iowa DOT project pages for I-35 list current and upcoming work by milepost, which helps you match alerts to the segments below.

Southern Iowa: Missouri line to Des Moines

Crossing from Missouri, I-35 climbs through low hills and river valleys between the state line and Osceola, then flattens toward West Des Moines. Bridges over the Chariton River bottoms and the overpasses near Osceola ice over before the surrounding pavement does, so early-morning black ice is the recurring hazard here. Treat the first freeze after rain on this stretch as suspect even when 511 Iowa shows no active alert yet.

Northern Iowa: Ames to the Minnesota line, the blowing-snow corridor

North of Ames the terrain opens into flat, unsheltered farmland, and that is where blowing snow shuts the road. The milepost ranges to watch are roughly MP 113–194 between Ames and Clear Lake, where crosswinds strip fresh snow across the lanes in minutes, and MP 194–218 from Clear Lake to the Minnesota line near Albert Lea. When 511 Iowa posts a wind advisory or a blowing-snow closure, it is almost always on one of these two ranges, and the closures can last hours until plows and wind both let up. Dispatch needs the milepost, not the nearest town, because a closure at MP 145 and one at MP 205 mean different detours. This is exactly the gap MileCheck was built for: the mile marker needs no subscription on MileCheck, and Premium adds the live map and state DOT feeds so you can read alerts and your milepost together while rolling.

When is I-35 construction in Iowa scheduled, and how do work zones change traffic?

Iowa DOT stages most interstate paving and bridge work between April and October, with lane closures lifted or reduced for winter. On I-35, expect the heaviest activity in the central corridor near Des Moines and Ankeny, where reconstruction projects have run in phases for several seasons. Projects are staged so one direction stays open while the other carries head-to-head traffic behind barrier.

Finding active I-35 projects on the Iowa DOT site

511 Iowa lists active work zones as an alert type, and the Iowa DOT publishes project lists by district and route. Check both before dispatch and again mid-trip, since night work and rolling closures appear with little notice. Long-term zones can sit on the same stretch for a full season.

Work zone rules that matter for CDL drivers

Work zones frequently post lane-width restrictions that squeeze oversize loads. Speed drops are enforced, and narrow lanes mean slowing well below the posted truck speed to keep your trailer inside the line. If dispatch needs your position inside a zone, a milepost beats a cross-street guess; MileCheck's API (https://milecheckapp.com/api/) returns milepost-based locations that map straight to 511 alert references.

How do Iowa I-35 conditions compare with connecting routes like I-80 and I-35 across the Missouri line?

A clear stretch of I-35 through Iowa can sit between two closed ends. The Iowa segment runs its own plow schedule under its own DOT, so you have to check each state's feed separately and treat the corridor as three jurisdictions, not one.

Checking I-80 at the Des Moines interchange

The I-235 and I-80 junctions around Des Moines are where blowing snow closes ramps first; the Iowa DOT's winter messaging repeatedly warns that crosswinds and drifting hit interchange areas and open stretches hardest before tree lines return (https://iowadot.gov). If your route turns west on I-80, check that feed before you leave I-35, because closure timing rarely matches.

Missouri and Minnesota feeds before you cross the line

Missouri and Minnesota run separate 511 systems with their own closure and restriction logic. Pull both before the state line, not after. The same applies anywhere: on a Wyoming run we broke down in the highway report for Wyoming, conditions changed at the border long before the signs did.

What should commercial drivers know about I-35 wind advisories and restrictions in Iowa?

Wind advisories for high-profile vehicles

Iowa's flat northern stretches of I-35, especially north of Ames toward the Minnesota line, are exposed ground where crosswinds push empty or light-load trailers toward the shoulder. 511 Iowa posts wind advisories as a distinct alert type, so check for them alongside closures and incidents before you commit to the route. A wind advisory is not a closure, but treat it as a signal to drop speed and expect sudden gusts at overpasses and open cuts. If you are running deadhead or hauling a high-profile load, note the milepost where conditions worsen so dispatch and roadside assistance get an exact location if something goes wrong.

Traction rules and when plows pull off

During winter storms, 511 Iowa may post traction-related advisories when snow and blowing snow reduce pavement grip on I-35. Severe weather can also pull plows off the road entirely, which means untreated stretches between passes. When either appears, build in extra following distance and check the alert again before rural segments, because conditions change faster than a single morning check can cover.

How far in advance can 511 Iowa alerts be trusted for planning an I-35 trip?

Planned events you can trust days out

Scheduled construction and planned closures are the reliable part of 511 Iowa. Work zone postings and long-term closures typically appear before the cones go out, so a Monday check for a Thursday run through the I-35 construction segments is usually accurate. What no system can predict is the crash, the sudden blowing snow on the open stretches north of Ames, or a traction advisory issued mid-morning. Treat anything incident-based as valid only until your next check.

Setting re-check points along the route

Build re-checks into the trip rather than hoping the forecast holds. A workable habit: check 511 Iowa before departure, again at the Missouri line after reviewing our Missouri road conditions page or the MoDOT traveler information map for conditions on I-35 south of the state line, and again before the I-80 junction. Each check takes under two minutes and catches closures, wind advisories, and restrictions that appeared after you rolled.

What tools give you mileposts and live I-35 conditions in one place?

Comparing the options

511 Iowa gives you closures, restrictions, incidents, and wind advisories straight from the state, but reading it mid-route means pulling up a website or calling. State 511 phone lines and DOT websites elsewhere along your run have the same limitation: accurate, but not built for a driver at 65 mph. Waze covers incidents well in metros and thins out badly on rural interstate. Trucker Path covers truck stops and scales, with road conditions as a secondary feature.

Where MileCheck fits and where it does not

MileCheck runs on the same milepost format dispatch and 911 expect, and Premium ($19.99/yr or $4.99/mo, with a 2-week trial) adds the live map, state DOT feeds, and route planning. The mile marker needs no subscription.

Where it falls short: there is no incident reporting from other drivers, so you will not see a crash before the DOT feed updates. And feed depth depends on the state, so Iowa coverage is stronger than some connecting states. If you need driver-reported incidents, Waze or Trucker Path still earn their place alongside it.

FAQ

Is Interstate 35 in Iowa closed right now?

Check our live Iowa road conditions map at https://milecheckapp.com/road-conditions/iowa/ (closures by milepost), or 511 Iowa at 511ia.org. This guide cannot show live status, so check 511 Iowa before you roll. Open the map at 511ia.org, filter for closures, and read the milepost on any red symbol along I-35. If a closure sits ahead of your position, exit before that milepost and reroute, since closed segments rarely reopen on a schedule that fits your delivery window.

What mile marker is Des Moines on I-35 in Iowa?

Iowa mileposts are listed at https://milecheckapp.com/blog/mile-markers-iowa.html. Des Moines sits in the lower-middle portion of I-35's Iowa mileage, well south of the Ames-to-Minnesota corridor covered in this guide. Because 511 Iowa posts every alert at a milepost, confirm your exact position against the alert rather than relying on a town name, since a closure near Des Moines and one near Clear Lake mean entirely different detours.

Does Iowa have chain laws for trucks on I-35?

Iowa does not run the standing chain requirements you find in western mountain states. What 511 Iowa posts instead are traction-related advisories during storms, when snow and blowing snow cut pavement grip on segments like the open prairie north of Ames. Treat those advisories as a signal to slow down and build following distance, and re-check before rural stretches.

How do I report a crash or hazard on I-35 in Iowa?

Call 911 for crashes and hazards, and give the milepost rather than the nearest town so responders find you faster. If you are stopped and safe, the Iowa DOT can also be reached through its district offices. 511 Iowa runs on state DOT feeds rather than driver reports, so do not expect your phone call to appear on the map immediately.

Is I-35 in Iowa windy for high-profile trucks?

Yes, especially north of Ames, where flat, unsheltered farmland lets crosswinds push empty or light-load trailers toward the shoulder. The stretch from Ames to Clear Lake and onward to the Minnesota line is where 511 Iowa posts most wind advisories. An advisory is not a closure, but drop your speed and expect sudden gusts at overpasses and open cuts.

Keep reading

Iowa: Iowa road conditions  ·  Iowa highway cameras  ·  Iowa mile markers

Next to Iowa on I-35: Missouri road conditions  ·  Minnesota road conditions

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