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.
25 other detections within 20 km in the last 24 hours, the nearest 1 km from here.
This alert expired on 7 September 2026 at 00:15 UTC. It is kept here as a record.
No stronger detection stands among the 66 recorded within 20 km of this point since 15 March 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 6 at 6:53PM CDT until September 6 at 7:15PM CDT by NWS Kansas City/Pleasant Hill MO
An estimated 798,382 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 31, 2026 · score 37 · 7.3 km
- September 6, 2026 · score 54 · 9.1 km
- September 6, 2026 · score 54 · 19.2 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 54 out of 100, at 90 % 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 | High |
| Calamity Score (ours) | 54 / 100 |
| Our confidence | 90% |
| Coordinates | 39.5106, -94.7567 |
| Nearest City | Leavenworth (26 km) |
| Population Exposed | 798.4K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-06T23:53:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.17a9e62e1a17470e0517a87c463c4e4f3b93a324.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Johnson, KS; Wyandotte, KS; Daviess, MO; Harrison, MO; Atchison, KS; Leavenworth, KS and 1 more areas |
| Headline | Severe Thunderstorm Warning issued September 6 at 6:53PM CDT until September 6 at 7:15PM CDT by NWS Kansas City/Pleasant Hill MO |
| Expires | 2026-09-06T19:15:00-05:00 |
| SenderName | NWS Kansas City/Pleasant Hill MO |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.17a9e62e1a17470e0517a87c463c4e4f3b93a324.001.1","noaa_urn:oid:2.49.0.1.840.0.4c00af3a31b35d5a34a5df8dab259359c450ba45.002.1","noaa_urn:oid:2.49.0.1.840.0.0b0852434ee6146e5f9a44552cd889af1fb8101b.001.1","noaa_urn:oid:2.49.0.1.840.0.a41cd2238f3282f7236d2de4294fc7fb57c4ba81.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | 2 SE Bonner Springs |
| Spc County | Johnson |
| Spc State | KS |
| Spc Comments | Report from mPING: Quarter (1.00 in.). (EAX) |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 5 SE Winchester |
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 Leavenworth?
Calamity.live data shows a weather event with CalamityScore 54/100, near Leavenworth (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.