Brown County weather alerts
There are no active weather alerts for Brown County, IL right now.
Since 2016 the National Weather Service has issued about 652 alerts that included Brown County, roughly 65 a year. The most common is the severe thunderstorm warning (83 from 2016 to 2025). The last tornado warning was issued on June 17, 2026. 12 tornadoes have touched down in the county since 1950.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
No warnings, watches or advisories include Brown County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Pike County, Cass County, Morgan County, Schuyler County.
Brown County alert history
Alert events that included Brown County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 83 | 11 | July 21, 2026 |
| Dense Fog Advisory | 76 | 3 | September 11, 2026 |
| Winter Weather Advisory | 62 | 2 | March 16, 2026 |
| Severe Thunderstorm Watch | 61 | 2 | April 27, 2026 |
| Flood Warning | 57 | 6 | August 18, 2026 |
| Wind Advisory | 54 | 4 | June 17, 2026 |
| Freeze Warning | 29 | 2 | November 7, 2026 |
| Tornado Watch | 29 | 10 | June 17, 2026 |
| Flood Watch | 28 | 7 | August 15, 2026 |
| Cold Weather Advisory | 28 | 3 | January 26, 2026 |
| Heat Advisory | 27 | 6 | August 31, 2026 |
| Flood Advisory | 14 | 1 | June 13, 2026 |
| Frost Advisory | 14 | 1 | October 17, 2026 |
| Winter Storm Watch | 14 | 0 | November 29, 2025 |
| Winter Storm Warning | 12 | 0 | November 29, 2025 |
| Red Flag Warning | 10 | 1 | February 27, 2026 |
| Freeze Watch | 10 | 0 | November 2, 2025 |
| Tornado Warning | 9 | 2 | June 17, 2026 |
| Flash Flood Warning | 8 | 1 | April 27, 2026 |
| Extreme Cold Warning | 7 | 0 | January 21, 2025 |
| Extreme Heat Warning | 5 | 3 | September 3, 2026 |
| Extreme Heat Watch | 4 | 1 | July 26, 2026 |
| Fire Weather Watch | 3 | 1 | February 27, 2026 |
| High Wind Warning | 3 | 0 | March 5, 2025 |
| Extreme Cold Watch | 2 | 0 | December 22, 2022 |
| Ice Storm Warning | 1 | 0 | January 13, 2017 |
| Blizzard Warning | 1 | 0 | November 25, 2018 |
| High Wind Watch | 1 | 0 | March 14, 2019 |
Tornado history in Brown County
12 tornadoes have been recorded in Brown County since 1950, injuring 22 people. That ranks 94 of 102 counties in Illinois. The most recent was on October 13, 2023 (rated EF1).
Strongest tornadoes in Brown County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 10, 2003 | F2 | Adams County | 30.8 mi | 300 yd | 0 | 0 |
| April 23, 1955 | F2 | Adams County | 14.8 mi | 10 yd | 0 | 0 |
| April 27, 1956 | F2 | Brown County | 4.9 mi | 900 yd | 0 | 0 |
| March 26, 1959 | F2 | Brown County | 3 mi | 200 yd | 0 | 0 |
| October 14, 1966 | F2 | Brown County | 1 mi | 100 yd | 0 | 20 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| October 13, 2023 | EF1 | Brown County | 0.4 mi | 25 yd | 0 | 1 |
| February 28, 2017 | EF1 | Brown County | 0.7 mi | 50 yd | 0 | 1 |
| June 2, 2009 | EF0 | Adams County | 3 mi | 50 yd | 0 | 0 |
| May 10, 2003 | F2 | Adams County | 30.8 mi | 300 yd | 0 | 0 |
| August 12, 1999 | F1 | Brown County | 0.5 mi | 0 yd | 0 | 0 |
About Brown County
- Population: 6,307 (2024 estimate)
- State: Illinois
- NOAA Weather Radio SAME code: 017009 (how to use it)