This alert expired on 9 May 2026 at 01:30 UTC. It is kept here as a record.
It is the 3rd strongest of the 9 detections recorded within 20 km of this point since 9 May 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 8 at 7:59PM CDT until May 8 at 8:30PM CDT by NWS Tulsa OK
Nearby, since 9 May 2026
- June 22, 2026 · score 58 · 10.7 km
- August 7, 2026 · score 16 · 18.3 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 66 % 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) | 22 / 100 |
| Our confidence | 66% |
| Coordinates | 35.2868, -96.1559 |
| Nearest City | McAlester (53 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-09T00:59:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Adair, OK; Cherokee, OK; Cherokee, OK; Muskogee, OK; Sequoyah, OK; McIntosh, OK; Muskogee, OK; Okmulgee, OK and 2 more areas |
| Headline | Severe Thunderstorm Warning issued May 8 at 7:59PM CDT until May 8 at 8:30PM CDT by NWS Tulsa OK |
| Expires | 2026-05-08T20:30:00-05:00 |
| SenderName | NWS Tulsa OK |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9b241b3a25a8fc8bb59dd88e77bb83ee5ecca323.001.1","noaa_urn:oid:2.49.0.1.840.0.912fce2db142d3dc416ed46de22128bab8ef5d67.002.1","noaa_urn:oid:2.49.0.1.840.0.e41e3d3b5e642c0ff81969b85fde12baa6b9c35d.001.1","noaa_urn:oid:2.49.0.1.840.0.40527f1bb15dbbbbaec9a1db528d864d807f9829.001.1","noaa_urn:oid:2.49.0.1.840.0.bd0ee14a2618e652e6467a29d927457c2fe29113.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 2 W Liberty |
| Iem County | Okmulgee |
| Iem State | OK |
| Iem Wfo | TSA |
| Iem Remark | Hail near Highway 75 and Hectorville Rd. |
| MergedSources | [{"id":"iem_H_35.860_-96.020_1778287680000","source":"iem","severity":"low","severityValue":25,"timestamp":1778287680000,"latitude":35.86,"longitude":-96.02}] |
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.
Calamity.live data shows a weather event with CalamityScore 22/100, near McAlester (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.