Marengo, IA Live Doppler Radar
Live radar for Marengo, Iowa County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.
What weather hits Marengo?
Since 1996, the National Weather Service has logged heavy snow or a winter storm on 83 days in the Iowa forecast zone and Iowa County — the most common reported hazard around Marengo, mostly in January and December. Next come damaging thunderstorm winds (63 days) and flooding (31 days).
| Hazard | Days reported | Most recent | Worst on record |
|---|---|---|---|
| Heavy snow & winter storms | 83 | Nov 2025 | Jan 5, 2005 · $10,000 damage |
| Damaging thunderstorm winds | 63 | Jun 2026 | Jun 29, 1998 · $800,000 damage |
| Flooding | 31 | Jun 2020 | Jun 1, 2008 · $747,000 damage |
| Flash flooding | 25 | Jul 2025 | Jun 22, 2007 · $750,000 damage |
| Extreme cold & wind chill | 15 | Jan 2019 | — |
| Ice storms & sleet | 10 | Dec 2024 | Feb 24, 2007 · $890,000 damage |
| Blizzards | 9 | Mar 2026 | — |
| High winds | 8 | Feb 2016 | Apr 6, 1997 · $100,000 damage |
Source: NOAA NCEI Storm Events Database, 1996–2026 (the latest year is partial). A "day" is a date with at least one report in the Iowa forecast zone and Iowa County; damage is as reported, not adjusted for inflation.
How much snow does Marengo get?
A normal year brings about 28 inches of snow to Marengo, based on NOAA's 1991–2020 climate normals for the Williamsburg 1E weather station 9.8 miles away. The snowiest month is usually February (7.7 in).
| Oct | Nov | Dec | Jan | Feb | Mar | Apr | May |
|---|---|---|---|---|---|---|---|
| 0.3 | 1.6 | 6.3 | 7.6 | 7.7 | 3.6 | 0.9 | 0.1 |
Normal snowfall in inches. TALON Pro compares this season's snow at your location with these normals as winter goes on.
Which radars cover Marengo?
The closest NEXRAD Doppler radar is KDVN (Quad Cities, IA), about 78 miles east. Radar beams climb as they travel, so the height of the lowest scan over town decides how low in a storm the radar can see.
| Radar | Distance | Lowest beam over Marengo | View |
|---|---|---|---|
| KDVN Quad Cities, IA | 78 mi east | 6,600 ft | Fair — the beam can pass over shallow snow and low-level rotation |
| KDMX Des Moines, IA | 85 mi west | 7,600 ft | Fair — the beam can pass over shallow snow and low-level rotation |
| KARX La Crosse, WI | 147 mi north-northeast | 17,600 ft | Limited — the beam overshoots the lowest part of storms |
Beam height is the center of the 0.5° scan above the radar, with standard refraction. Mountains near a radar can block it further.
Tornado & hail history near Marengo
Since 1950, NOAA has recorded 119 tornadoes within 25 miles of Marengo, 28 of them EF2/F2 or stronger. Most came in May and April. The strongest was an F4 on June 7, 1984, which passed about 19 miles southeast of town and caused 3 deaths. The most recent was an EF1 on July 11, 2025, which passed about 15 miles north-northwest of town.
Hail: 331 reports of 1-inch or larger hail within 25 miles since 1955, 20 of them 2 inches or more; the largest was 2.75-inch hail on May 7, 2023.
Source: NOAA Storm Prediction Center — tornadoes 1950–2025, hail 1955–2025. Distances are to each tornado's track; ratings before February 2007 use the original Fujita scale.
On TALON you get Marengo's live radar loop, rain/snow/ice colors, flash-flood risk, storm tracks with arrival times and NWS warnings free; close-up radar and rotation detection are part of TALON Pro.
Marengo radar FAQ
Where is the nearest weather radar to Marengo, IA?
KDVN (Quad Cities, IA), about 78 miles east. KDMX (Des Moines, IA) is 85 miles away and also covers the area.
Does radar show snow in Marengo?
Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over Marengo the lowest scan from KDVN is about 6,600 ft up, so light snow from shallow clouds can be under-shown — check NWS winter alerts too.
Is TALON's radar for Marengo free?
Yes — the US radar loop, rain/snow/ice colors, flash-flood risk, storm tracks and NWS warnings are free in any browser. Close-up radar, rotation detection and longer forecasts are part of TALON Pro.
Should I rely on radar for my safety?
No app replaces official warnings. When the National Weather Service issues a warning for Marengo, follow it right away — see watch vs. warning.
Radar for nearby towns
- Williamsburg, IA radar 9 mi
- Belle Plaine, IA radar 13 mi
- Walford, IA radar 14 mi
- Fairfax, IA radar 17 mi
- Atkins, IA radar 17 mi
- North English, IA radar 19 mi
- Brooklyn, IA radar 20 mi
- Tiffin, IA radar 22 mi
- Palo, IA radar 23 mi
- Cedar Rapids, IA radar 23 mi