This alert expired on 26 July 2026 at 01:30 UTC. It is kept here as a record.
No stronger detection stands among the 59 recorded within 20 km of this point since 16 March 2026 — 41 others scored the same. Another comparable one was recorded here earlier the same day. 14 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued July 25 at 9:20AM EDT until July 26 at 4:10PM EDT by NWS Peachtree City GA
An estimated 1,776,918 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 26, 2026 · score 46 · 0.0 km
- July 24, 2026 · score 52 · 0.0 km
- May 26, 2026 · score 52 · 0.0 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 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 52 / 100 |
| Our confidence | 81% |
| Coordinates | 34.0671, -84.2643 |
| Nearest City | Alpharetta (3 km) |
| Population Exposed | 1.8M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-25T13:20:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f535ad1be4e318830b0364eb0f739ca9dd7e16f8.001.1 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Forsyth, GA; Fulton, GA |
| Headline | Flood Warning issued July 25 at 9:20AM EDT until July 26 at 4:10PM EDT by NWS Peachtree City GA |
| Expires | 2026-07-25T21:30:00-04:00 |
| SenderName | NWS Peachtree City GA |
| HasExactCoords | true |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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.
Want to know when something happens near Alpharetta?
Calamity.live data shows a weather event with CalamityScore 52/100, near Alpharetta (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.