This alert expired on 27 June 2026 at 09:30 UTC. It is kept here as a record.
No stronger detection stands among the 41 recorded within 20 km of this point since 8 May 2026 — 9 others scored the same. The last comparable one was on 23 June 2026. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 27 at 3:45AM CDT until June 27 at 4:30AM CDT by NWS Norman OK
An estimated 1,030,997 people live within 50 km of this point.
Nearby, since 8 May 2026
- July 5, 2026 · score 52 · 12.1 km
- June 14, 2026 · score 52 · 13.7 km
- May 10, 2026 · score 52 · 15.4 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 90 % 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 | 90% |
| Coordinates | 35.1300, -97.4800 |
| Nearest City | Norman (11 km) |
| Population Exposed | 1.0M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-27T08:45:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cleveland, OK; Grady, OK; McClain, OK; Pottawatomie, OK |
| Headline | Severe Thunderstorm Warning issued June 27 at 3:45AM CDT until June 27 at 4:30AM CDT by NWS Norman OK |
| Expires | 2026-06-27T04:30:00-05:00 |
| SenderName | NWS Norman OK |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | 1 SW Midwest City |
| Iem County | Oklahoma |
| Iem State | OK |
| Iem Wfo | OUN |
| Iem Remark | Large tree limbs snapped and trees split at trunk between SE 15th and SE 29th on S Air Depot road. Widespread power outage. |
| MergedSources | [{"id":"iem_G_35.660_-97.190_1782540060000","source":"iem","severity":"low","severityValue":25,"timestamp":1782540060000,"latitude":35.66,"longitude":-97.19},{"id":"iem_G_35.470_-98.000_1782536700000","source":"iem","severity":"low","severityValue":25,"timestamp":1782536700000,"latitude":35.47,"longitude":-98},{"id":"iem_G_35.560_-98.040_1782536700000","source":"iem","severity":"low","severityValue":25,"timestamp":1782536700000,"latitude":35.56,"longitude":-98.04},{"id":"iem_D_35.440_-97.410_1782539820000","source":"iem","severity":"low","severityValue":25,"timestamp":1782539820000,"latitude":35.44,"longitude":-97.41}] |
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 Norman (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.