Right now
The most recent data we hold from NOAA arrived 12 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 12 September 2026 at 22:15 UTC. It is kept here as a record.
It is the strongest of the 50 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 12 at 5:02PM CDT until September 12 at 5:15PM CDT by NWS Topeka KS
Urban PEI: 80,929 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- May 15, 2026 · score 39 · 6.0 km
- June 13, 2026 · score 34 · 16.8 km
- June 21, 2026 · score 39 · 20.5 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 45 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 45 / 100 |
| Legacy data-support index | 0.84/1 |
| Coordinates | 39.2533, -97.1150 |
| Nearest City | Junction City (35 km) |
| Urban exposure index (PEI) | 80.9K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-12T22:02:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.99aaef2efc95606cfcf4b653340cca898efaa7b9.001.1 |
Physical priority index · v4 (historical). Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-09-12T22:02:00.000Z.
First archived: 2026-09-12T22:04:59.899Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clay, KS |
| Headline | Severe Thunderstorm Warning issued September 12 at 5:02PM CDT until September 12 at 5:15PM CDT by NWS Topeka KS |
| Expires | 2026-09-12T17:15:00-05:00 |
| SenderName | NWS Topeka KS |
| HasExactCoords | true |
| Spc ReportType | hail |
| Spc Speed | 125 |
| Spc Location | Jamestown |
| Spc County | Cloud |
| Spc State | KS |
| Spc Comments | MPING report. (TOP) |
| MergedSources | [{"id":"spc_wind_39.55_-97.65_11","source":"spc","severity":"medium","severityValue":45,"timestamp":1789243560000,"latitude":39.55,"longitude":-97.65},{"id":"spc_hail_39.60_-97.86_26","source":"spc","severity":"high","severityValue":65,"timestamp":1789245360000,"latitude":39.6,"longitude":-97.86}] |
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens in this area?