Harristown, IL Live Doppler Radar
Live radar for Harristown, Macon County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.
What weather hits Harristown?
Since 1996, the National Weather Service has logged damaging thunderstorm winds on 124 days in the Macon forecast zone and Macon County — the most common reported hazard around Harristown, mostly in June and May. Next come flash flooding (41 days) and heavy snow & winter storms (37 days).
| Hazard | Days reported | Most recent | Worst on record |
|---|---|---|---|
| Damaging thunderstorm winds | 124 | Jun 2026 | Aug 12, 1999 · $2.2 million damage |
| Flash flooding | 41 | Mar 2026 | Aug 26, 2014 · $20 million damage |
| Heavy snow & winter storms | 37 | Jan 2026 | Dec 1, 2006 · $1.5 million damage |
| High winds | 18 | Sep 2024 | Mar 25, 1996 · 1 death |
| Excessive heat | 14 | Aug 2024 | — |
| Extreme cold & wind chill | 8 | Jan 2026 | — |
| Lightning casualties & damage | 4 | May 2019 | Feb 26, 2009 · $50,000 damage |
| Ice storms & sleet | 3 | Jan 2024 | — |
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 Macon forecast zone and Macon County; damage is as reported, not adjusted for inflation.
How much snow does Harristown get?
A normal year brings about 14 inches of snow to Harristown, based on NOAA's 1991–2020 climate normals for the Decatur Wtp weather station 5.9 miles away. The snowiest month is usually January (5.9 in).
| Oct | Nov | Dec | Jan | Feb | Mar | Apr | May |
|---|---|---|---|---|---|---|---|
| 0.0 | 0.4 | 3.5 | 5.9 | 2.5 | 0.9 | 0.4 | 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 Harristown?
The closest NEXRAD Doppler radar is KILX (Lincoln, IL), about 26 miles northwest. 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 Harristown | View |
|---|---|---|---|
| KILX Lincoln, IL | 26 mi northwest | 1,500 ft | Excellent — the lowest scan sees close to the ground |
| KLSX St. Louis, MO | 117 mi southwest | 12,300 ft | Limited — the beam overshoots the lowest part of storms |
| KVWX Evansville, IN | 131 mi south-southeast | 14,600 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 Harristown
Since 1950, NOAA has recorded 181 tornadoes within 25 miles of Harristown, 28 of them EF2/F2 or stronger. Most came in April and May. The strongest was an F4 on March 20, 1976, which passed about 14 miles east-southeast of town. The most recent was an EF2 on December 28, 2025, which passed about 7 miles south-southeast of town.
Hail: 240 reports of 1-inch or larger hail within 25 miles since 1955, 15 of them 2 inches or more; the largest was 3.50-inch hail on June 22, 1960.
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 Harristown'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.
Harristown radar FAQ
Where is the nearest weather radar to Harristown, IL?
KILX (Lincoln, IL), about 26 miles northwest. KLSX (St. Louis, MO) is 117 miles away and also covers the area.
Does radar show snow in Harristown?
Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over Harristown the lowest scan from KILX is about 1,500 ft up.
Is TALON's radar for Harristown 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 Harristown, follow it right away — see watch vs. warning.
Radar for nearby towns
- Warrensburg, IL radar 6 mi
- Decatur, IL radar 7 mi
- Forsyth, IL radar 8 mi
- Macon, IL radar 10 mi
- Mount Zion, IL radar 10 mi
- Blue Mound, IL radar 10 mi
- Long Creek, IL radar 12 mi
- Maroa, IL radar 14 mi
- Moweaqua, IL radar 15 mi
- Mount Pulaski, IL radar 17 mi