Allegany County weather alerts
There are no active weather alerts for Allegany County, NY right now.
Since 2016 the National Weather Service has issued about 619 alerts that included Allegany County, roughly 62 a year. The most common is the severe thunderstorm warning (148 from 2016 to 2025). The last tornado warning was issued on September 2, 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 Allegany County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Livingston County, Wyoming County, Potter County, Steuben County.
Allegany County alert history
Alert events that included Allegany County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 148 | 22 | September 3, 2026 |
| Winter Weather Advisory | 119 | 6 | March 16, 2026 |
| Wind Advisory | 55 | 5 | June 18, 2026 |
| Severe Thunderstorm Watch | 42 | 6 | September 9, 2026 |
| Flood Watch | 34 | 2 | August 2, 2026 |
| Frost Advisory | 27 | 2 | May 22, 2026 |
| Flood Warning | 25 | 1 | July 6, 2026 |
| Flash Flood Warning | 25 | 5 | September 3, 2026 |
| Winter Storm Watch | 19 | 1 | January 25, 2026 |
| Winter Storm Warning | 15 | 1 | January 25, 2026 |
| Cold Weather Advisory | 15 | 6 | February 8, 2026 |
| Freeze Warning | 12 | 1 | May 12, 2026 |
| High Wind Warning | 11 | 0 | January 12, 2024 |
| Dense Fog Advisory | 11 | 4 | March 21, 2026 |
| Snow Squall Warning | 11 | 5 | January 22, 2026 |
| Tornado Warning | 10 | 3 | September 2, 2026 |
| High Wind Watch | 7 | 0 | January 13, 2024 |
| Lake Effect Snow Warning | 6 | 0 | November 27, 2025 |
| Tornado Watch | 6 | 2 | September 2, 2026 |
| Heat Advisory | 6 | 3 | July 14, 2026 |
| Freeze Watch | 5 | 0 | May 18, 2023 |
| Extreme Cold Watch | 4 | 1 | February 7, 2026 |
| Extreme Cold Warning | 4 | 1 | February 7, 2026 |
| Red Flag Warning | 1 | 0 | May 2, 2018 |
| Blizzard Warning | 1 | 0 | February 27, 2020 |
Tornado history in Allegany County
12 tornadoes have been recorded in Allegany County since 1950. That ranks 13 of 62 counties in New York. The most recent was on September 6, 2024 (rated EF1).
Strongest tornadoes in Allegany County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 20, 1969 | F3 | Chautauqua County | 84.1 mi | 10 yd | 0 | 0 |
| April 28, 2002 | F2 | Allegany County | 6.5 mi | 300 yd | 0 | 0 |
| September 3, 1993 | F2 | Allegany County | 3.5 mi | 50 yd | 0 | 0 |
| August 9, 2009 | EF1 | Allegany County | 7.8 mi | 25 yd | 0 | 0 |
| June 27, 2010 | EF1 | Allegany County | 7.4 mi | 250 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| September 6, 2024 | EF1 | Allegany County | 6 mi | 200 yd | 0 | 0 |
| July 20, 2017 | EF1 | Allegany County | 4.2 mi | 740 yd | 0 | 0 |
| July 20, 2017 | EF0 | Allegany County | 1.1 mi | 150 yd | 0 | 0 |
| June 27, 2010 | EF1 | Allegany County | 7.4 mi | 250 yd | 0 | 0 |
| August 9, 2009 | EF1 | Allegany County | 7.8 mi | 25 yd | 0 | 0 |
About Allegany County
- Population: 47,299 (2024 estimate)
- State: New York
- NOAA Weather Radio SAME code: 036003 (how to use it)