Seneca, IL Live Doppler Radar
Live radar for Seneca, La Salle County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.
What weather hits Seneca?
Since 1996, the National Weather Service has logged damaging thunderstorm winds on 163 days in the La Salle forecast zone and La Salle County — the most common reported hazard around Seneca, mostly in June and July. Next come heavy snow & winter storms (48 days) and flooding (41 days).
| Hazard | Days reported | Most recent | Worst on record |
|---|---|---|---|
| Damaging thunderstorm winds | 163 | Jun 2026 | Oct 3, 2000 · $100,000 damage |
| Heavy snow & winter storms | 48 | Nov 2025 | — |
| Flooding | 41 | Jan 2025 | Sep 15, 2008 · $5.0 million damage |
| Flash flooding | 29 | Aug 2025 | Apr 18, 2013 · 1 death · $75 million damage |
| High winds | 21 | Jun 2026 | Jan 29, 2008 · $250,000 damage |
| Extreme cold & wind chill | 19 | Jan 2026 | — |
| Lightning casualties & damage | 15 | Jul 2018 | Aug 8, 2011 · $50,000 damage |
| Excessive heat | 12 | Jun 2026 | — |
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 La Salle forecast zone and La Salle County; damage is as reported, not adjusted for inflation.
How much snow does Seneca get?
A normal year brings about 25 inches of snow to Seneca, based on NOAA's 1991–2020 climate normals for the Marseilles Lock weather station 7.4 miles away. The snowiest month is usually January (8.4 in).
| Oct | Nov | Dec | Jan | Feb | Mar | Apr | May |
|---|---|---|---|---|---|---|---|
| 0.0 | 0.8 | 5.3 | 8.4 | 7.3 | 2.9 | 0.3 | 0.0 |
Normal snowfall in inches. TALON Pro compares this season's snow at your location with these normals as winter goes on.
Which radars cover Seneca?
The closest NEXRAD Doppler radar is KLOT (Chicago, IL), about 34 miles 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.
| Radar | Distance | Lowest beam over Seneca | View |
|---|---|---|---|
| KLOT Chicago, IL | 34 mi northeast | 2,200 ft | Excellent — the lowest scan sees close to the ground |
| KILX Lincoln, IL | 88 mi south-southwest | 7,900 ft | Fair — the beam can pass over shallow snow and low-level rotation |
| KDVN Quad Cities, IA | 104 mi west-northwest | 10,200 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 Seneca
Since 1950, NOAA has recorded 119 tornadoes within 25 miles of Seneca, 28 of them EF2/F2 or stronger. Most came in June and July. The strongest was an EF4 on November 17, 2013, which passed about 24 miles south-southwest of town and caused 3 deaths. The most recent was an EF0 on March 14, 2025, which passed about 23 miles north-northeast of town.
Hail: 176 reports of 1-inch or larger hail within 25 miles since 1955, 14 of them 2 inches or more; the largest was 4.75-inch hail on June 10, 2015.
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 Seneca'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.
Seneca radar FAQ
Where is the nearest weather radar to Seneca, IL?
KLOT (Chicago, IL), about 34 miles northeast. KILX (Lincoln, IL) is 88 miles away and also covers the area.
Does radar show snow in Seneca?
Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over Seneca the lowest scan from KLOT is about 2,200 ft up.
Is TALON's radar for Seneca 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 Seneca, follow it right away — see watch vs. warning.
Radar for nearby towns
- Marseilles, IL radar 4 mi
- Morris, IL radar 11 mi
- Ottawa, IL radar 11 mi
- Sheridan, IL radar 16 mi
- Streator, IL radar 17 mi
- Dwight, IL radar 17 mi
- Gardner, IL radar 17 mi
- Coal City, IL radar 17 mi
- Diamond, IL radar 19 mi
- Minooka, IL radar 20 mi