Onondaga County weather alerts
There are no active weather alerts for Onondaga County, NY right now.
Since 2016 the National Weather Service has issued about 899 alerts that included Onondaga County, roughly 90 a year. The most common is the severe thunderstorm warning (194 from 2016 to 2025). The last tornado warning was issued on September 3, 2026. 10 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 Onondaga County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Oswego County, Cayuga County, Cortland County, Madison County.
Onondaga County alert history
Alert events that included Onondaga County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 194 | 27 | September 13, 2026 |
| Winter Weather Advisory | 135 | 6 | March 17, 2026 |
| Flood Advisory | 89 | 0 | March 6, 2025 |
| Wind Advisory | 62 | 4 | June 18, 2026 |
| Severe Thunderstorm Watch | 53 | 9 | August 27, 2026 |
| Heat Advisory | 52 | 3 | July 14, 2026 |
| Winter Storm Watch | 41 | 2 | January 25, 2026 |
| Snow Squall Warning | 39 | 6 | January 22, 2026 |
| Winter Storm Warning | 34 | 1 | January 25, 2026 |
| Frost Advisory | 31 | 4 | May 22, 2026 |
| Flood Watch | 24 | 2 | September 2, 2026 |
| Flash Flood Warning | 22 | 6 | September 2, 2026 |
| Lake Effect Snow Warning | 19 | 3 | March 17, 2026 |
| Flood Warning | 15 | 2 | April 5, 2026 |
| Tornado Warning | 15 | 2 | September 3, 2026 |
| Cold Weather Advisory | 12 | 3 | February 8, 2026 |
| Freeze Warning | 11 | 1 | May 3, 2026 |
| High Wind Warning | 10 | 0 | November 5, 2025 |
| High Wind Watch | 8 | 0 | November 5, 2025 |
| Tornado Watch | 7 | 2 | September 2, 2026 |
| Extreme Cold Warning | 6 | 1 | February 7, 2026 |
| Dense Fog Advisory | 6 | 1 | February 18, 2026 |
| Freeze Watch | 5 | 0 | October 10, 2025 |
| Extreme Cold Watch | 4 | 1 | February 7, 2026 |
| Extreme Heat Warning | 3 | 1 | July 1, 2026 |
| Extreme Heat Watch | 2 | 1 | July 1, 2026 |
Tornado history in Onondaga County
10 tornadoes have been recorded in Onondaga County since 1950, killing 1 people and injuring 5. That ranks 20 of 62 counties in New York. The most recent was on July 29, 2006 (rated F0).
Strongest tornadoes in Onondaga County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 2, 1983 | F3 | Cayuga County | 20 mi | 200 yd | 1 | 0 |
| June 2, 1969 | F3 | Cayuga County | 17.5 mi | 10 yd | 0 | 0 |
| July 13, 1986 | F1 | Oswego County | 11 mi | 10 yd | 0 | 5 |
| August 24, 1993 | F1 | Onondaga County | 0.3 mi | 20 yd | 0 | 0 |
| July 28, 2002 | F1 | Onondaga County | 0.1 mi | 50 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| July 29, 2006 | F0 | Onondaga County | 3 mi | 75 yd | 0 | 0 |
| July 28, 2002 | F1 | Onondaga County | 0.1 mi | 50 yd | 0 | 0 |
| September 24, 2001 | F0 | Onondaga County | 0.5 mi | 75 yd | 0 | 0 |
| August 24, 1993 | F1 | Onondaga County | 0.3 mi | 20 yd | 0 | 0 |
| July 29, 1993 | F0 | Onondaga County | 0.7 mi | 23 yd | 0 | 0 |
About Onondaga County
- Population: 469,812 (2024 estimate)
- State: New York
- NOAA Weather Radio SAME code: 036067 (how to use it)
- Cities: Syracuse