Right now
The most recent data we hold from NOAA arrived 2 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
35 other detections within 20 km in the last 24 hours, the nearest 3 km from here.
This alert expired on 17 May 2026 at 03:00 UTC. It is kept here as a record.
It is the 67th strongest of the 586 detections recorded within 20 km of this point since 10 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 Watch issued May 16 at 3:53PM CDT until May 16 at 10:00PM CDT by NWS St Louis MO
Urban PEI: 450,012 within a heuristic 50 km radius; not unique people.
Nearby, since 10 March 2026
- August 11, 2026 · score 43 · 0.0 km
- August 10, 2026 · score 43 · 0.0 km
- July 26, 2026 · score 43 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 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 v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 43 / 100 |
| Legacy data-support index | 0.78/1 |
| Coordinates | 40.6000, -89.4000 |
| Nearest City | Morton (5 km) |
| Urban exposure index (PEI) | 450.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-16T20:53:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.9f3fa38a153a364a0a9009ebd0161c6f |
Physical priority index · v1. 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: 2026-05-16T20:53:00.000Z.
First archived: 2026-05-16T22:23:12.029Z. 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 Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Bond, IL; Clinton, IL; Fayette, IL; Marion, IL; Washington, IL; Edwards, IL; Franklin, IL; Hamilton, IL; Jefferson, IL; Perry, IL; Wabash, IL; Wayne, IL; White, IL; Gibson, IN; Pike, IN; Posey, IN; Spencer, IN; Vanderburgh, IN; Warrick, IN; Daviess, KY; Henderson, KY; Clark, IL; Clay, IL; Crawford, IL; Cumberland, IL; Effingham, IL; Jasper, IL; Lawrence, IL; Richland, IL |
| Headline | Severe Thunderstorm Watch issued May 16 at 3:53PM CDT until May 16 at 10:00PM CDT by NWS St Louis MO |
| Expires | 2026-05-16T22:00:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | false |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9f3fa38a153a364a0a9009ebd0161c6fb76d4e17.001.1","noaa_urn:oid:2.49.0.1.840.0.25b08565be666093574b9f5077d93331876ad3ab.001.1","noaa_urn:oid:2.49.0.1.840.0.14eaa9a8f93194be2f202c1e1d330aa86a1aef5f.001.1"] |
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.
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