This alert expired on 12 March 2026 at 08:45 UTC. It is kept here as a record.
No stronger detection stands among the 21 recorded within 20 km of this point since 12 March 2026 — 11 others scored the same.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued March 12 at 4:16AM EDT until March 12 at 4:45AM EDT by NWS Peachtree City GA
An estimated 1,531,437 people live within 50 km of this point.
Nearby, since 12 March 2026
- July 27, 2026 · score 52 · 7.7 km
- July 27, 2026 · score 52 · 11.3 km
- July 27, 2026 · score 52 · 16.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 78 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 78% |
| Coordinates | 33.5250, -84.4443 |
| Nearest City | Riverdale (6 km) |
| Population Exposed | 1.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-12T08:16:00.000Z |
| Source | https://api.weather.gov/alerts/urn-oid-2_49_0_1_840_0_d9699d79f3faac386e202487232021a61d0b5324_001_1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clayton, GA; Coweta, GA; Fayette, GA; Fulton, GA |
| Headline | Severe Thunderstorm Warning issued March 12 at 4:16AM EDT until March 12 at 4:45AM EDT by NWS Peachtree City GA |
| Expires | 2026-03-12T04:45:00-04:00 |
| SenderName | NWS Peachtree City GA |
| HasExactCoords | true |
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 10 February 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.
Want to know when something happens near Riverdale?
Calamity.live data shows a weather event with CalamityScore 52/100, near Riverdale (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.