Right now
The most recent data we hold from NOAA arrived 5 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 4 July 2026 at 21:15 UTC. It is kept here as a record.
It is the 11th strongest of the 13 detections recorded within 20 km of this point since 27 April 2026. The last comparable one was on 3 July 2026. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 4 at 3:30PM CDT until July 4 at 4:15PM CDT by NWS St Louis MO
Urban PEI: 36,862 within a heuristic 50 km radius; not unique people.
Nearby, since 27 April 2026
- June 24, 2026 · score 43 · 18.2 km
- July 2, 2026 · score 43 · 26.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 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) | 34 / 100 |
| Legacy data-support index | 0.78/1 |
| Coordinates | 39.3689, -90.0489 |
| Nearest City | Jacksonville (43 km) |
| Urban exposure index (PEI) | 36.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T20:30:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.0bf2265e535369399690ed59c6176d03 |
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: 2026-07-04T20:30:00.000Z.
First archived: 2026-07-04T20:35:53.123Z. 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 | St. Louis, MO; St. Louis City, MO; Maries, MO; Phelps, MO; Pulaski, MO; Crawford, MO; Franklin, MO; Washington, MO and 6 more areas |
| Headline | Severe Thunderstorm Warning issued July 4 at 3:30PM CDT until July 4 at 4:15PM CDT by NWS St Louis MO |
| Expires | 2026-07-04T16:15:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0bf2265e535369399690ed59c6176d03f352e31d.001.1","noaa_urn:oid:2.49.0.1.840.0.94d34e06ef6debf26c0308e5ecc33ce403110203.001.1","noaa_urn:oid:2.49.0.1.840.0.a6513532be335f97d680ca8918cb74ae44f239dc.002.1","noaa_urn:oid:2.49.0.1.840.0.3c2801ddbc60c702cdf4d41a966647dd692d41d2.001.1","noaa_urn:oid:2.49.0.1.840.0.9178d9a23c5cd3776fed47e4ef79da8b5cc17c08.001.1","noaa_urn:oid:2.49.0.1.840.0.4bed5b0cf7b9beda46a17dbc93b18adb8793464f.001.1","noaa_urn:oid:2.49.0.1.840.0.d10e8fd2906c137bb6ddc00c0e7c78938c8b3af2.001.1","noaa_urn:oid:2.49.0.1.840.0.9661b1a12b822de9ee0e101cebbee6a358c869b3.001.1","noaa_urn:oid:2.49.0.1.840.0.c308c802f3fddc40f8c8822ce712b930b094fed6.001.1"] |
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.
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