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.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 4 July 2026 at 22:00 UTC. It is kept here as a record.
It is the 7th strongest of the 20 detections recorded within 20 km of this point since 27 April 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 4 at 4:15PM CDT until July 4 at 5:00PM CDT by NWS St Louis MO
Nearby, since 27 April 2026
- July 4, 2026 · score 22 · 11.8 km
- August 6, 2026 · score 34 · 16.3 km
- August 12, 2026 · score 34 · 21.9 km
How we know
4 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 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) | 22 / 100 |
| Legacy data-support index | 0.68/1 |
| Coordinates | 38.0254, -90.9147 |
| Nearest City | Farmington (51 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-04T21:15:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.8486942707a7859b173afbb9c6e2924b |
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: 2026-07-04T21:15:00.000Z.
First archived: 2026-07-04T21:32:37.377Z. 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. Charles, MO; St. Louis, MO; Dent, MO; Shannon, MO; Texas, MO |
| Headline | Severe Thunderstorm Warning issued July 4 at 4:15PM CDT until July 4 at 5:00PM CDT by NWS St Louis MO |
| Expires | 2026-07-04T17:00:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8486942707a7859b173afbb9c6e2924b3f7aaf5d.001.1","noaa_urn:oid:2.49.0.1.840.0.8d6ea0b195b19811e3a5aae34aa5851b0f84b29d.001.1"] |
| Iem TypeSummary | D |
| Iem City | Salem |
| Iem County | Dent |
| Iem State | MO |
| Iem Wfo | SGF |
| Iem Remark | Branches blown off tree into internet utility line. Line downed into roadway. Time estimated from security camera footage. |
| MergedSources | [{"id":"iem_D_37.940_-91.750_1783195200000","source":"iem","severity":"low","severityValue":25,"timestamp":1783195200000,"latitude":37.94,"longitude":-91.75},{"id":"iem_D_37.950_-91.530_1783196100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783196100000,"latitude":37.95,"longitude":-91.53},{"id":"iem_D_37.650_-91.530_1783197240000","source":"iem","severity":"low","severityValue":25,"timestamp":1783197240000,"latitude":37.65,"longitude":-91.53}] |
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?