Right now
The most recent data we hold from NOAA arrived 6 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 9 September 2026 at 23:00 UTC. It is kept here as a record.
It is the 36th strongest of the 102 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 7 September 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 9 at 5:26PM CDT until September 9 at 6:00PM CDT by NWS Kansas City/Pleasant Hill MO
An estimated 1,541,427 people live within 50 km of this point.
Nearby, since 16 March 2026
- May 19, 2026 · score 76 · 5.2 km
- September 7, 2026 · score 58 · 6.8 km
- August 6, 2026 · score 46 · 10.6 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 85 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 46 / 100 |
| Our confidence | 85% |
| Coordinates | 38.8300, -94.2300 |
| Nearest City | Lee's Summit (16 km) |
| Population Exposed | 1.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-09T22:26:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.5b33f3d2946700984058c8eb12abde7e4aa5f21a.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cass, MO; Jackson, MO; Johnson, MO; Lafayette, MO |
| Headline | Severe Thunderstorm Warning issued September 9 at 5:26PM CDT until September 9 at 6:00PM CDT by NWS Kansas City/Pleasant Hill MO |
| Expires | 2026-09-09T18:00:00-05:00 |
| SenderName | NWS Kansas City/Pleasant Hill MO |
| HasExactCoords | true |
| Heat Gov Event | Heat Advisory |
| Heat Gov Urgency | Expected |
| Heat Gov Certainty | Likely |
| Heat Gov Onset | 2026-09-09T12:00:00-05:00 |
| Heat Gov Expires | 2026-09-09T11:45:00-05:00 |
| Heat Gov AreaDesc | Linn; Pettis; Bates; Henry |
| Heat Gov SenderName | NWS Kansas City/Pleasant Hill MO |
| Heat Gov ZonesUsedForCentroid | 4 |
| Heat Gov ZoneCount | 4 |
| MergedSources | [{"id":"heat_gov_38.4_-94.0_heat_advisory_2026-09-09","source":"heat_gov","severity":"medium","severityValue":50,"timestamp":1788973200000,"latitude":38.391758161177485,"longitude":-94.03139785778511}] |
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.
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