This alert expired on 18 June 2026 at 14:30 UTC. It is kept here as a record.
It is the 5th strongest of the 35 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 18 at 10:03AM EDT until June 18 at 10:30AM EDT by NWS Binghamton NY
An estimated 106,175 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 21, 2026 · score 37 · 4.5 km
- July 18, 2026 · score 67 · 6.5 km
- July 18, 2026 · score 67 · 7.7 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 84 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 43 / 100 |
| Our confidence | 84% |
| Coordinates | 42.8213, -77.1608 |
| Nearest City | Henrietta (45 km) |
| Population Exposed | 106.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-18T14:03:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.0b1f7e8a23d671d0bab16248bd3e900b |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Seneca, NY; Allegany, NY; Cayuga, NY; Oswego, NY; Wayne, NY |
| Headline | Severe Thunderstorm Warning issued June 18 at 10:03AM EDT until June 18 at 10:30AM EDT by NWS Binghamton NY |
| Expires | 2026-06-18T10:30:00-04:00 |
| SenderName | NWS Binghamton NY |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0b1f7e8a23d671d0bab16248bd3e900b6a162fce.001.1","noaa_urn:oid:2.49.0.1.840.0.6a72d6a7c1926edc9ab78b4c2570113fb0dcc34d.001.1","noaa_urn:oid:2.49.0.1.840.0.1847ec61d32f27b3a6d9dc9c73dabe4399d2d051.001.1"] |
| Iem TypeSummary | O |
| Iem City | 2 NNE Spencerport |
| Iem County | Monroe |
| Iem State | NY |
| Iem Wfo | BUF |
| Iem Remark | Downed tree across both lanes on NY 259 just south of Ridge Road causing road to be closed. |
| MergedSources | [{"id":"iem_O_43.220_-77.790_1781785800000","source":"iem","severity":"low","severityValue":25,"timestamp":1781785800000,"latitude":43.22,"longitude":-77.79}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.