Right now
The most recent data we hold from NOAA arrived 29 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 1 August 2026 at 05:00 UTC. It is kept here as a record.
No stronger detection stands among the 111 recorded within 20 km of this point since 15 March 2026 — 30 others scored the same. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Watch issued July 31 at 10:47PM CDT until August 1 at 12:00AM CDT by NWS St Louis MO
Urban PEI: 42,595 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- September 14, 2026 · score 46 · 0.0 km
- July 21, 2026 · score 28 · 0.0 km
- July 9, 2026 · score 34 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 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) | 46 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 38.5000, -92.3000 |
| Nearest City | Jefferson City (14 km) |
| Urban exposure index (PEI) | 42.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-01T03:47:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Watch_noaa_urn:oid:2.49.0.1.840.0.ae8448ec7607ca3d5a21f0a090fe1eaf |
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: 2026-08-01T03:47:00.000Z.
First archived: 2026-08-01T03:56:37.069Z. 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 | Tornado Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Iron, MO; Reynolds, MO; Dent, MO; Douglas, MO; Howell, MO; Oregon, MO; Ozark, MO; Shannon, MO; Texas, MO; Wright, MO |
| Headline | Tornado Watch issued July 31 at 10:47PM CDT until August 1 at 12:00AM CDT by NWS St Louis MO |
| Expires | 2026-08-01T00:00:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | false |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ae8448ec7607ca3d5a21f0a090fe1eafe03a9a39.001.1","noaa_urn:oid:2.49.0.1.840.0.755de2544df76f0c7fad6c335a0d0a82ec87ac6c.002.1"] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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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