Somonauk, IL Live Doppler Radar
Live radar for Somonauk, De Kalb County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.
What weather hits Somonauk?
Since 1996, the National Weather Service has logged damaging thunderstorm winds on 127 days in the De Kalb forecast zone and De Kalb County — the most common reported hazard around Somonauk, mostly in June and July. Next come heavy snow & winter storms (43 days) and extreme cold & wind chill (26 days).
| Hazard | Days reported | Most recent | Worst on record |
|---|---|---|---|
| Damaging thunderstorm winds | 127 | Jun 2026 | May 20, 2014 · $500,000 damage |
| Heavy snow & winter storms | 43 | Dec 2025 | Jan 26, 2014 · 1 death |
| Extreme cold & wind chill | 26 | Jan 2026 | — |
| Flash flooding | 21 | Aug 2025 | Sep 14, 2008 · $3.0 million damage |
| Flooding | 20 | Jun 2026 | Aug 23, 2007 · $1.0 million damage |
| High winds | 17 | Jun 2026 | Oct 26, 2010 · $50,000 damage |
| Excessive heat | 9 | Jun 2026 | — |
| Blizzards | 6 | Feb 2015 | — |
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 De Kalb forecast zone and De Kalb County; damage is as reported, not adjusted for inflation.
How much snow does Somonauk get?
A normal year brings about 30 inches of snow to Somonauk, based on NOAA's 1991–2020 climate normals for the Shabbona 3S weather station 11.4 miles away. The snowiest month is usually January (10.2 in).
| Oct | Nov | Dec | Jan | Feb | Mar | Apr | May |
|---|---|---|---|---|---|---|---|
| 0.0 | 0.5 | 8.3 | 10.2 | 7.1 | 3.4 | 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 Somonauk?
The closest NEXRAD Doppler radar is KLOT (Chicago, IL), about 31 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 Somonauk | View |
|---|---|---|---|
| KLOT Chicago, IL | 31 mi east | 1,900 ft | Excellent — the lowest scan sees close to the ground |
| KMKX Milwaukee/Sullivan, WI | 92 mi north | 8,500 ft | Fair — the beam can pass over shallow snow and low-level rotation |
| KDVN Quad Cities, IA | 98 mi west | 9,300 ft | Fair — the beam can pass over shallow snow and low-level rotation |
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 Somonauk
Since 1950, NOAA has recorded 143 tornadoes within 25 miles of Somonauk, 17 of them EF2/F2 or stronger. Most came in June and May. The strongest was an F5 on August 28, 1990, which passed about 18 miles east of town and caused 29 deaths. The most recent was an EF0 on March 14, 2025, which passed about 13 miles east of town.
Hail: 291 reports of 1-inch or larger hail within 25 miles since 1955, 41 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 Somonauk'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.
Somonauk radar FAQ
Where is the nearest weather radar to Somonauk, IL?
KLOT (Chicago, IL), about 31 miles east. KMKX (Milwaukee/Sullivan, WI) is 92 miles away and also covers the area.
Does radar show snow in Somonauk?
Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over Somonauk the lowest scan from KLOT is about 1,900 ft up.
Is TALON's radar for Somonauk 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 Somonauk, follow it right away — see watch vs. warning.
Radar for nearby towns
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- Earlville, IL radar 13 mi
- Yorkville, IL radar 13 mi
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- Montgomery, IL radar 18 mi