This alert expired on 21 July 2026 at 23:30 UTC. It is kept here as a record.
It is the strongest of the 17 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 18 July 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 21 at 6:14PM EDT until July 21 at 7:30PM EDT by NWS Buffalo NY
An estimated 17,965 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 18, 2026 · score 22 · 23.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 out of 100, at 79 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 28 / 100 |
| Our confidence | 79% |
| Coordinates | 42.4511, -78.5053 |
| Nearest City | Lackawanna (49 km) |
| Population Exposed | 18.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T22:14:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.fa428ed0bc15ac9bd84dcfb5dfc2d38f |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Genesee, NY; Livingston, NY; Monroe, NY; Ontario, NY; Wyoming, NY; Chautauqua, NY; Ashtabula, OH; Crawford, PA; Erie, PA and 1 more areas |
| Headline | Severe Thunderstorm Warning issued July 21 at 6:14PM EDT until July 21 at 7:30PM EDT by NWS Buffalo NY |
| Expires | 2026-07-21T19:30:00-04:00 |
| SenderName | NWS Buffalo NY |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.fa428ed0bc15ac9bd84dcfb5dfc2d38f3934d8e5.001.1","noaa_urn:oid:2.49.0.1.840.0.d9391533e3c911be2578ba883b436872b324c8b2.001.1","noaa_urn:oid:2.49.0.1.840.0.11370fc8a19613c649a466a5d34b4aab957338de.001.1","noaa_urn:oid:2.49.0.1.840.0.f53d22b0b5c893121ef4a2cf220c6ea8c632d0c7.001.1"] |
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 10 February 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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 28/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.