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 4 July 2026 at 22:15 UTC. It is kept here as a record.
No stronger detection stands among the 59 recorded within 20 km of this point since 4 July 2026 — 17 others scored the same. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 4 at 5:54PM EDT until July 4 at 6:15PM EDT by NWS Peachtree City GA
Urban PEI: 1,623,108 within a heuristic 50 km radius; not unique people.
Nearby, since 4 July 2026
- July 4, 2026 · score 52 · 0.0 km
- July 4, 2026 · score 52 · 6.2 km
- July 24, 2026 · score 52 · 14.6 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 52 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) | 52 / 100 |
| Legacy data-support index | 0.83/1 |
| Coordinates | 33.9823, -84.0262 |
| Nearest City | Lawrenceville (4 km) |
| Urban exposure index (PEI) | 1.6M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T21:54:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.20eea2d7f81cecf1f2e267351868d89d9d844da3.002.1 |
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: 2026-07-04T21:54:00.000Z.
First archived: 2026-07-04T22:08:46.329Z. 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 | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Barrow, GA; Gwinnett, GA; Walton, GA |
| Headline | Severe Thunderstorm Warning issued July 4 at 5:54PM EDT until July 4 at 6:15PM EDT by NWS Peachtree City GA |
| Expires | 2026-07-04T18:15:00-04:00 |
| SenderName | NWS Peachtree City GA |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | Dacula |
| Iem County | Gwinnett |
| Iem State | GA |
| Iem Wfo | FFC |
| MergedSources | [{"id":"iem_H_33.990_-83.900_1783200720000","source":"iem","severity":"low","severityValue":25,"timestamp":1783200720000,"latitude":33.99,"longitude":-83.9}] |
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 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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