Ontario County weather alerts
There are no active weather alerts for Ontario County, NY right now.
Since 2016 the National Weather Service has issued about 632 alerts that included Ontario County, roughly 63 a year. The most common is the severe thunderstorm warning (166 from 2016 to 2025). The last tornado warning was issued on July 18, 2026. 7 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 Ontario County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Seneca County, Wayne County, Monroe County, Livingston County.
Ontario County alert history
Alert events that included Ontario County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 166 | 24 | October 16, 2026 |
| Winter Weather Advisory | 94 | 5 | March 16, 2026 |
| Wind Advisory | 55 | 5 | June 18, 2026 |
| Heat Advisory | 44 | 4 | July 14, 2026 |
| Severe Thunderstorm Watch | 41 | 4 | July 18, 2026 |
| Flash Flood Warning | 26 | 1 | July 18, 2026 |
| Frost Advisory | 26 | 4 | May 12, 2026 |
| Flood Watch | 25 | 2 | August 2, 2026 |
| Flood Warning | 25 | 3 | April 1, 2026 |
| Snow Squall Warning | 18 | 7 | February 3, 2026 |
| Winter Storm Warning | 17 | 1 | January 25, 2026 |
| Winter Storm Watch | 16 | 1 | January 25, 2026 |
| High Wind Warning | 13 | 1 | June 18, 2026 |
| Cold Weather Advisory | 12 | 3 | February 8, 2026 |
| High Wind Watch | 9 | 0 | February 28, 2024 |
| Tornado Warning | 8 | 1 | July 18, 2026 |
| Freeze Warning | 8 | 0 | May 18, 2023 |
| Tornado Watch | 6 | 1 | September 2, 2026 |
| Dense Fog Advisory | 6 | 2 | March 21, 2026 |
| Extreme Cold Watch | 4 | 1 | February 7, 2026 |
| Extreme Cold Warning | 4 | 1 | February 7, 2026 |
| Freeze Watch | 3 | 0 | May 18, 2023 |
| Extreme Heat Warning | 2 | 1 | July 1, 2026 |
| Lake Effect Snow Warning | 1 | 0 | November 19, 2016 |
| Red Flag Warning | 1 | 0 | May 2, 2018 |
| Ice Storm Warning | 1 | 0 | April 14, 2018 |
| Extreme Heat Watch | 1 | 1 | July 1, 2026 |
Tornado history in Ontario County
7 tornadoes have been recorded in Ontario County since 1950. That ranks 33 of 62 counties in New York. The most recent was on July 7, 2025 (rated EF2).
Strongest tornadoes in Ontario County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| July 7, 2025 | EF2 | Ontario County | 1.7 mi | 300 yd | 0 | 0 |
| June 22, 1996 | F1 | Ontario County | 3 mi | 50 yd | 0 | 0 |
| August 20, 1994 | F1 | Ontario County | 2 mi | 100 yd | 0 | 0 |
| July 15, 1996 | F1 | Ontario County | 0.5 mi | 15 yd | 0 | 0 |
| August 29, 2009 | EF0 | Ontario County | 10.6 mi | 35 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| July 7, 2025 | EF2 | Ontario County | 1.7 mi | 300 yd | 0 | 0 |
| July 15, 2024 | EF0 | Ontario County | 0.8 mi | 75 yd | 0 | 0 |
| June 10, 2015 | EF0 | Ontario County | 0.3 mi | 50 yd | 0 | 0 |
| August 29, 2009 | EF0 | Ontario County | 10.6 mi | 35 yd | 0 | 0 |
| July 15, 1996 | F1 | Ontario County | 0.5 mi | 15 yd | 0 | 0 |
About Ontario County
- Population: 113,012 (2024 estimate)
- State: New York
- NOAA Weather Radio SAME code: 036069 (how to use it)