Marathon, OH Live Doppler Radar

Live radar for Marathon, Clermont County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.

Open live radar for MarathonWhat TALON shows

What weather hits Marathon?

Since 1996, the National Weather Service has logged damaging thunderstorm winds on 199 days in the Clermont forecast zone and Clermont County — the most common reported hazard around Marathon, mostly in July and June. Next come flash flooding (64 days) and flooding (56 days).

HazardDays reportedMost recentWorst on record
Damaging thunderstorm winds199Jun 2026Jun 10, 1999 · $500,000 damage
Flash flooding64Jun 2026Jul 17, 2001 · $1.8 million damage
Flooding56Apr 2025Jun 9, 2010 · 2 deaths · $3,000 damage
Heavy snow & winter storms54Jan 2026Jan 6, 1996 · $500,000 damage
High winds14Mar 2026Mar 13, 2026 · 1 death
Excessive heat8Aug 2023—
Ice storms & sleet6Nov 2018Feb 13, 2007 · 1 death
Lightning casualties & damage6Aug 2002May 24, 1996 · $50,000 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 Clermont forecast zone and Clermont County; damage is as reported, not adjusted for inflation.

Which radars cover Marathon?

The closest NEXRAD Doppler radar is KILN (Wilmington, OH), about 21 miles north-northeast. 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.

RadarDistanceLowest beam over MarathonView
KILN
Wilmington, OH		21 mi north-northeast1,200 ftExcellent — the lowest scan sees close to the ground
KJKL
Jackson, KY		114 mi south-southeast11,700 ftLimited — the beam overshoots the lowest part of storms
KIND
Indianapolis, IN		127 mi west-northwest14,000 ftLimited — 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 Marathon

Since 1950, NOAA has recorded 111 tornadoes within 25 miles of Marathon, 20 of them EF2/F2 or stronger. Most came in June and April. The strongest was an F4 on April 9, 1999, which passed about 16 miles northwest of town and caused 4 deaths. The most recent was an EF0 on April 2, 2025, which passed about 15 miles north-northwest of town.

Hail: 266 reports of 1-inch or larger hail within 25 miles since 1955, 15 of them 2 inches or more; the largest was 2.75-inch hail on May 13, 1998.

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 Marathon'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.

Marathon radar FAQ

Where is the nearest weather radar to Marathon, OH?

KILN (Wilmington, OH), about 21 miles north-northeast. KJKL (Jackson, KY) is 114 miles away and also covers the area.

Does radar show snow in Marathon?

Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over Marathon the lowest scan from KILN is about 1,200 ft up.

Is TALON's radar for Marathon 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 Marathon, follow it right away — see watch vs. warning.

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