Tornado Warning issued March 15 at 4:47PM CDT until March 15 at 5:15PM CDT by NWS St Louis MO
Geographic Context
This weather event occurred near St. Louis (approximately 5 km away) in United States, an area that experiences a range of natural hazards. An estimated 1.3M people live within 50 km of the event location, placing this in the "catastrophic" population impact tier.
Event Assessment
This event is a weather event classified as critical severity. Calamity.live has classified it as "critical" severity with a severity value of 95. The computed Calamity Score is 76 out of 100, indicating a significant event requiring close monitoring. The primary scoring components are: population (100), intensity (95), historical (80). Data for this event was sourced from noaa, one of the 250 scientific monitoring sources aggregated by Calamity.live.
Regional Monitoring Context
United States has a documented history of weather events. Monitoring for weather events in the region relies on a combination of ground-based sensors, satellite remote sensing, and official reporting from national agencies. The frequency and severity of such events are tracked over time to support risk assessment and emergency preparedness.
Event Data
| Type | Weather |
| Severity | critical |
| Severity Value | 95 |
| Calamity Score | 76 / 100 |
| Confidence | 88% |
| Coordinates | 38.6579, -90.2450 |
| Nearest City | St. Louis (5 km) |
| Population Exposed | 1.3M within 50 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-03-15T21:47:00.000Z |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | St. Louis, MO; St. Louis City, MO |
| Headline | Tornado Warning issued March 15 at 4:47PM CDT until March 15 at 5:15PM CDT by NWS St Louis MO |
| Expires | 2026-03-15T17:15:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem Unit | |
| Iem City | Washington |
| Iem County | Franklin |
| Iem State | MO |
| Iem Wfo | LSX |
| Iem Remark | Tree down in Washington. |
| MergedSources | [{"id":"iem_C_38.970_-90.490_1773609240000","source":"iem","severity":"low","severityValue":25,"timestamp":1773609240000,"latitude":38.97,"longitude":-90.49},{"id":"iem_D_38.980_-90.980_1773607140000","source":"iem","severity":"low","severityValue":25,"timestamp":1773607140000,"latitude":38.98,"longitude":-90.98},{"id":"iem_D_38.440_-91.020_1773608700000","source":"iem","severity":"low","severityValue":25,"timestamp":1773608700000,"latitude":38.44,"longitude":-91.02},{"id":"iem_D_38.550_-91.020_1773608700000","source":"iem","severity":"low","severityValue":25,"timestamp":1773608700000,"latitude":38.55,"longitude":-91.02}] |
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.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a weather event with CalamityScore 76/100, near St. Louis (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 197 scientific monitoring sources.