Right now
The most recent data we hold from NOAA arrived 11 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 18 July 2026 at 01:45 UTC. It is kept here as a record.
No stronger detection stands among the 18 recorded within 20 km of this point since 16 March 2026 — 4 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 17 at 3:39PM EDT until July 17 at 9:45PM EDT by NWS Peachtree City GA
Urban PEI: 101,728 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- July 1, 2026 · score 43 · 3.4 km
- August 9, 2026 · score 39 · 16.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 34.5482, -84.1974 |
| Nearest City | Canton (44 km) |
| Urban exposure index (PEI) | 101.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-17T19:39:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.f28b10dc3357060bc443593db9483a31 |
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: 2026-07-17T19:39:00.000Z.
First archived: 2026-07-17T19:47:08.647Z. 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 | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Towns, GA; Union, GA; Cherokee, GA; Cobb, GA; DeKalb, GA; Fulton, GA; Gwinnett, GA; Fannin, GA; Gilmer, GA and 1 more areas |
| Headline | Flash Flood Warning issued July 17 at 3:39PM EDT until July 17 at 9:45PM EDT by NWS Peachtree City GA |
| Expires | 2026-07-17T21:45:00-04:00 |
| SenderName | NWS Peachtree City GA |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f28b10dc3357060bc443593db9483a31c5283266.001.1","noaa_urn:oid:2.49.0.1.840.0.7f9608f338177e184cd10a3dab3de5749a811c14.001.1","noaa_urn:oid:2.49.0.1.840.0.5daeeebb999090c80ea22864d1b559ef4eb04269.001.1","noaa_urn:oid:2.49.0.1.840.0.c0287f54cee92ef8ed67b019bb44544070cce4ec.001.1"] |
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.
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