Nassau County, New York: tornado and severe weather warnings
Nothing is in effect for Nassau County as of 7:42 PM EDT: no warnings, watches or advisories. This page checks the National Weather Service every minute.
Open the live map on Nassau 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 Nassau County. Tap your own street on it for times that apply to you.
The last 12 months in Nassau County
- 2 tornado warnings
- 13 severe thunderstorm warnings
- 6 flash flood warnings
- 1 tornado watches
- 9 severe thunderstorm watches
The most recent tornado warning that included Nassau County was issued Aug 20, 2026 by the Weather Service office in New York, NY.
| Date | Issued | Type | Office | Product |
|---|---|---|---|---|
| Aug 27, 2026 | 4:52 PM EDT | Flash flood warning | OKX | text |
| Aug 23, 2026 | 7:21 AM EDT | Flash flood warning | OKX | text |
| Aug 20, 2026 | 6:49 PM EDT | Tornado warning | OKX | text |
| Aug 20, 2026 | 6:44 PM EDT | Tornado warning | OKX | text |
| Aug 20, 2026 | 6:13 PM EDT | Flash flood warning | OKX | text |
| Aug 8, 2026 | 4:21 PM EDT | Severe thunderstorm warning | OKX | text |
| Aug 7, 2026 | 6:24 PM EDT | Severe thunderstorm warning | OKX | text |
| Aug 7, 2026 | 5:20 PM EDT | Severe thunderstorm warning | OKX | text |
| Aug 3, 2026 | 5:41 AM EDT | Flash flood warning | OKX | text |
| Jul 21, 2026 | 4:21 PM EDT | Flash flood warning | OKX | text |
| Jul 21, 2026 | 4:12 PM EDT | Severe thunderstorm warning | OKX | text |
| Jul 15, 2026 | 5:05 PM EDT | Severe thunderstorm warning | OKX | text |
A warning counts here if the Weather Service listed Nassau County in it, even if the warned area covered only part of the county.
Nearby
- Queens County, NY
- Bronx County, NY
- Kings County, NY
- New York County, NY
- Hudson County, NJ
- Bergen County, NJ
- Westchester County, NY
- Richmond 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.