St. Lawrence County, New York: tornado and severe weather warnings
Nothing is in effect for St. Lawrence County as of 8:45 PM EDT: no warnings, watches or advisories. This page checks the National Weather Service every minute.
Open the live map on St. Lawrence 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 St. Lawrence County. Tap your own street on it for times that apply to you.
The last 12 months in St. Lawrence County
- 0 tornado warnings
- 23 severe thunderstorm warnings
- 0 flash flood warnings
- 1 tornado watches
- 3 severe thunderstorm watches
No tornado warning has included St. Lawrence County in the last 12 months.
| Date | Issued | Type | Office | Product |
|---|---|---|---|---|
| Sep 13, 2026 | 5:32 PM EDT | Severe thunderstorm warning | BTV | text |
| Aug 14, 2026 | 2:46 PM EDT | Severe thunderstorm warning | BTV | text |
| Aug 10, 2026 | 9:58 PM EDT | Severe thunderstorm warning | BTV | text |
| Aug 10, 2026 | 8:21 PM EDT | Severe thunderstorm warning | BTV | text |
| Aug 10, 2026 | 7:46 PM EDT | Severe thunderstorm warning | BTV | text |
| Jul 21, 2026 | 7:46 PM EDT | Severe thunderstorm warning | BTV | text |
| Jul 15, 2026 | 2:00 AM EDT | Severe thunderstorm warning | BTV | text |
| Jul 15, 2026 | 2:00 AM EDT | Severe thunderstorm warning | BTV | text |
| Jul 15, 2026 | 1:45 AM EDT | Severe thunderstorm warning | BTV | text |
| Jul 15, 2026 | 1:08 AM EDT | Severe thunderstorm warning | BTV | text |
| Jul 15, 2026 | 1:02 AM EDT | Severe thunderstorm warning | BTV | text |
| Jul 15, 2026 | 12:42 AM EDT | Severe thunderstorm warning | BTV | text |
A warning counts here if the Weather Service listed St. Lawrence County in it, even if the warned area covered only part of the county.
Nearby
- Franklin County, NY
- Lewis County, NY
- Jefferson County, NY
- Hamilton County, NY
- Herkimer County, NY
- Essex County, NY
- Clinton County, NY
- Oneida 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.