Right now
The most recent data we hold from NOAA arrived 3 minutes 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 18 July 2026 at 20:45 UTC. It is kept here as a record.
It is the 13th strongest of the 49 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 18 at 3:40PM EDT until July 18 at 4:45PM EDT by NWS Buffalo NY
Nearby, since 17 March 2026
- September 2, 2026 · score 46 · 18.9 km
- June 18, 2026 · score 58 · 19.9 km
- July 18, 2026 · score 34 · 21.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 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 v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 22 / 100 |
| Legacy data-support index | 0.60/1 |
| Coordinates | 42.5252, -77.3497 |
| Nearest City | Henrietta (63 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-18T19:40:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.4bb1ff614be798030710859fb61a1745 |
Physical priority index · v1. 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: 2026-07-18T19:40:00.000Z.
First archived: 2026-07-18T19:42:08.647Z. 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 | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Erie, NY; Genesee, NY; Livingston, NY; Wyoming, NY; Livingston, NY; Monroe, NY; Ontario, NY; Wayne, NY; Broome, NY; Chenango, NY; Cortland, NY; Otsego, NY; Tioga, NY; Tompkins, NY and 2 more areas |
| Headline | Severe Thunderstorm Warning issued July 18 at 3:40PM EDT until July 18 at 4:45PM EDT by NWS Buffalo NY |
| Expires | 2026-07-18T16:45:00-04:00 |
| SenderName | NWS Buffalo NY |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4bb1ff614be798030710859fb61a1745983b374a.001.1","noaa_urn:oid:2.49.0.1.840.0.e556071f6165f4c8f25acc7193950c7f0e113ca5.001.1","noaa_urn:oid:2.49.0.1.840.0.db7f9922296a05884c53f4f3d4074ed6e6465e46.001.1","noaa_urn:oid:2.49.0.1.840.0.5596b707a73431f8e9dda69fa6672c5e02df2609.001.1","noaa_urn:oid:2.49.0.1.840.0.42fbff5c29588e94e66a059f70427fb4899c1b36.001.1"] |
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.
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