This alert expired on 21 July 2026 at 20:30 UTC. It is kept here as a record.
It is the 53rd strongest of the 97 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 21 at 4:01PM EDT until July 21 at 4:30PM EDT by NWS Albany NY
An estimated 392,039 people live within 50 km of this point.
Nearby, since 17 March 2026
- September 2, 2026 · score 37 · 8.1 km
- July 27, 2026 · score 43 · 8.1 km
- August 7, 2026 · score 43 · 8.7 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, at 79 % 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) | 37 / 100 |
| Our confidence | 79% |
| Coordinates | 40.5819, -75.6102 |
| Nearest City | Allentown (11 km) |
| Population Exposed | 392.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T20:01:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.a0f20f12a24c6e67d7d403428f3692df |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Dutchess, NY; Luzerne, PA; Carbon, PA; Monroe, PA and 4 more areas |
| Headline | Severe Thunderstorm Warning issued July 21 at 4:01PM EDT until July 21 at 4:30PM EDT by NWS Albany NY |
| Expires | 2026-07-21T16:30:00-04:00 |
| SenderName | NWS Albany NY |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a0f20f12a24c6e67d7d403428f3692df38d9bcf4.002.1","noaa_urn:oid:2.49.0.1.840.0.00b7a55f79f4578c7ceebf7c369cb346ed98e90a.001.1","noaa_urn:oid:2.49.0.1.840.0.268d684b36c2cb555fc05ea3db9b6b83ea836256.001.1","noaa_urn:oid:2.49.0.1.840.0.e85768ee45ac2aad87f555d8b6fd750c3fe2593b.001.1","noaa_urn:oid:2.49.0.1.840.0.477b922e914a231a5af6b5bfaba618244fc9c644.001.1","noaa_urn:oid:2.49.0.1.840.0.5a3b87cf1b4bab283df76633a5001c6a0ddee490.001.1","noaa_urn:oid:2.49.0.1.840.0.7fdb1afe90ec571ab0dd31ab36285c46b5c6be54.001.1"] |
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.
Want to know when something happens near Allentown?
Calamity.live data shows a weather event with CalamityScore 37/100, near Allentown (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.