Right now
The most recent data we hold from NOAA arrived 3 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 3 September 2026 at 02:30 UTC. It is kept here as a record.
It is one of only 4 we have recorded within 20 km of this point since 13 May 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Special Marine Warning issued September 2 at 8:55PM EDT until September 2 at 10:30PM EDT by NWS Buffalo NY
Urban PEI: 159,265 within a heuristic 50 km radius; not unique people.
Nearby, since 13 May 2026
- May 13, 2026 · 0.2 km
- May 16, 2026 · 3.7 km
- June 26, 2026 · 4.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 37 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 43.9111, -76.2570 |
| Nearest City | Watertown (29 km) |
| Urban exposure index (PEI) | 159.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-03T00:55:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.13f33ef7eaf2ff5cd0bc7a1627d05b67adb8adf2.001.1 |
Physical priority index · v4 (historical). Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-09-03T00:55:00.000Z.
First archived: 2026-09-03T01:00:36.328Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Mexico Bay NY to the St. Lawrence River; Mexico Bay NY to the St. Lawrence River beyond 5NM off shoreline to US-Canadian border; St. Lawrence River above Ogdensburg NY; St. Lawrence River from Ogdensburg to St. Regis NY; Hamlin Beach to Sodus Bay NY; Sodus Bay to Mexico Bay NY; Hamlin Beach to Sodus Bay NY beyond 5NM off shoreline to US-Canadian border; Sodus Bay to Mexico Bay NY beyond 5NM off shoreline to US-Canadian border; Sodus Bay to Mexico Bay NY; Mexico Bay NY to the St. Lawrence River; Sodus Bay to Mexico Bay NY beyond 5NM off shoreline to US-Canadian border; Mexico Bay NY to the St. Lawrence River beyond 5NM off shoreline to US-Canadian border; St. Lawrence River above Ogdensburg NY |
| Headline | Special Marine Warning issued September 2 at 8:55PM EDT until September 2 at 10:30PM EDT by NWS Buffalo NY |
| Expires | 2026-09-02T22:30:00-04:00 |
| SenderName | NWS Buffalo NY |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.13f33ef7eaf2ff5cd0bc7a1627d05b67adb8adf2.001.1","noaa_urn:oid:2.49.0.1.840.0.cf3678e69c9477f02c8fbca6c2f626b357a389a4.001.1","noaa_urn:oid:2.49.0.1.840.0.38f57325e5af036dd034b865c0e077b1ec0f3f63.001.1"] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Review the area, threshold and delivery channel in your account.
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