Right now
The most recent data we hold from NOAA arrived 8 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 May 2026 at 22:30 UTC. It is kept here as a record.
No stronger detection stands among the 23 recorded within 20 km of this point since 15 March 2026 — 15 others scored the same. 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 May 18 at 4:52PM CDT until May 18 at 5:30PM CDT by NWS Norman OK
An estimated 19,214 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 5, 2026 · score 34 · 13.9 km
- May 18, 2026 · score 34 · 15.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 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) | 34 / 100 |
| Our confidence | 79% |
| Coordinates | 34.8710, -99.4672 |
| Nearest City | Altus (29 km) |
| Population Exposed | 19.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-18T21:52:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.709daba652f9baca905b56dcb28c58fe |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Greer, OK; Harmon, OK; Jackson, OK; Kiowa, OK; Harmon, OK; Jackson, OK; Hardeman, TX; Custer, OK; Washita, OK |
| Headline | Severe Thunderstorm Warning issued May 18 at 4:52PM CDT until May 18 at 5:30PM CDT by NWS Norman OK |
| Expires | 2026-05-18T17:30:00-05:00 |
| SenderName | NWS Norman OK |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.709daba652f9baca905b56dcb28c58feb63e52d9.001.1","noaa_urn:oid:2.49.0.1.840.0.45d0135db9884f9a384b5c3d1fa7d5ace7bcd04f.001.1","noaa_urn:oid:2.49.0.1.840.0.7c166c8cc473ffed4af4dd2ea71ab1e386e7f3ca.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 Altus?
Calamity.live data shows a weather event with CalamityScore 34/100, near Altus (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.