This alert expired on 27 June 2026 at 06:00 UTC. It is kept here as a record.
It is the 4th strongest of the 55 detections recorded within 20 km of this point since 10 March 2026. Another comparable one was recorded here earlier the same day. 13 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 27 at 12:38AM CDT until June 27 at 1:00AM CDT by NWS Norman OK
An estimated 1,123,117 people live within 50 km of this point.
Nearby, since 10 March 2026
- August 7, 2026 · score 46 · 2.8 km
- June 27, 2026 · score 52 · 5.2 km
- May 10, 2026 · score 52 · 7.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 85 % 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) | 52 / 100 |
| Our confidence | 85% |
| Coordinates | 35.5515, -97.4580 |
| Nearest City | Oklahoma City (11 km) |
| Population Exposed | 1.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-27T05:38:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Oklahoma, OK |
| Headline | Severe Thunderstorm Warning issued June 27 at 12:38AM CDT until June 27 at 1:00AM CDT by NWS Norman OK |
| Expires | 2026-06-27T01:00:00-05:00 |
| SenderName | NWS Norman OK |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.04673c79777d78ab44b222a73982a1febd6ba9fb.001.1","noaa_urn:oid:2.49.0.1.840.0.6a1fb3ccbf4e05d4a98fb291f3215c8d724482d5.002.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 75 |
| Iem Unit | MPH |
| Iem City | 5 SW El Reno |
| Iem County | Canadian |
| Iem State | OK |
| Iem Wfo | OUN |
| Iem Remark | El Reno Airport. |
| MergedSources | [{"id":"iem_G_35.470_-98.000_1782536700000","source":"iem","severity":"low","severityValue":25,"timestamp":1782536700000,"latitude":35.47,"longitude":-98}] |
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 52/100, near Oklahoma City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.