Jefferson County, New York: tornado and severe weather warnings
Nothing is in effect for Jefferson County as of 6:59 PM EDT: no warnings, watches or advisories. This page checks the National Weather Service every minute.
Open the live map on Jefferson County Get a message when a warning reaches your address
The map shows radar, every warning shape, and the path and arrival time of each storm cell headed toward the center of Jefferson County. Tap your own street on it for times that apply to you.
The last 12 months in Jefferson County
- 1 tornado warnings
- 16 severe thunderstorm warnings
- 0 flash flood warnings
- 2 tornado watches
- 2 severe thunderstorm watches
The most recent tornado warning that included Jefferson County was issued May 13, 2026 by the Weather Service office in Buffalo, NY.
| Date | Issued | Type | Office | Product |
|---|---|---|---|---|
| Sep 2, 2026 | 8:59 PM EDT | Severe thunderstorm warning | BUF | text |
| Aug 14, 2026 | 3:25 PM EDT | Severe thunderstorm warning | BUF | text |
| Aug 14, 2026 | 2:57 PM EDT | Severe thunderstorm warning | BUF | text |
| Jul 21, 2026 | 1:26 PM EDT | Severe thunderstorm warning | BUF | text |
| Jul 1, 2026 | 8:57 PM EDT | Severe thunderstorm warning | BUF | text |
| Jul 1, 2026 | 8:36 PM EDT | Severe thunderstorm warning | BUF | text |
| Jul 1, 2026 | 8:03 PM EDT | Severe thunderstorm warning | BUF | text |
| Jun 30, 2026 | 11:30 PM EDT | Severe thunderstorm warning | BUF | text |
| Jun 30, 2026 | 10:42 PM EDT | Severe thunderstorm warning | BUF | text |
| Jun 30, 2026 | 1:56 PM EDT | Severe thunderstorm warning | BUF | text |
| Jun 30, 2026 | 12:35 PM EDT | Severe thunderstorm warning | BUF | text |
| Jun 26, 2026 | 5:43 AM EDT | Severe thunderstorm warning | BUF | text |
A warning counts here if the Weather Service listed Jefferson County in it, even if the warned area covered only part of the county.
Nearby
- Lewis County, NY
- Oswego County, NY
- St. Lawrence County, NY
- Oneida County, NY
- Herkimer County, NY
- Onondaga County, NY
- Cayuga County, NY
- Wayne County, NY
- All of New York
What the alerts mean
Alerts come from the National Weather Service and refresh every minute. Past warnings come from the Iowa Environmental Mesonet's archive of Weather Service products. During a warning, also listen to local radio, TV or a weather radio.