Right now
The most recent data we hold from NOAA arrived 5 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 28 May 2026 at 03:15 UTC. It is kept here as a record.
No stronger detection stands among the 80 recorded within 20 km of this point since 3 April 2026 — 11 others scored the same. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 27 at 5:56PM EDT until May 27 at 11:15PM EDT by NWS Charleston SC
An estimated 313,788 people live within 50 km of this point.
Nearby, since 3 April 2026
- May 27, 2026 · score 43 · 4.5 km
- September 6, 2026 · score 37 · 8.8 km
- August 11, 2026 · score 43 · 18.5 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 90 % 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) | 43 / 100 |
| Our confidence | 90% |
| Coordinates | 32.1405, -81.2445 |
| Nearest City | Pooler (2 km) |
| Population Exposed | 313.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-27T21:56:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.75624b40b1a0c8095c5942d0caf1858f61cc4c2a.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Chatham, GA; Effingham, GA; Jasper, SC |
| Headline | Flash Flood Warning issued May 27 at 5:56PM EDT until May 27 at 11:15PM EDT by NWS Charleston SC |
| Expires | 2026-05-27T23:15:00-04:00 |
| SenderName | NWS Charleston SC |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 4.27 |
| Iem Unit | inch |
| Iem City | 4 SSW Purysburg |
| Iem County | Effingham |
| Iem State | GA |
| Iem Wfo | CHS |
| Iem Remark | The Abercorn Creek near Savannah USGS gage measured 4.27 inches of rain between 3:15-6:00 pm. The peak hourly rainfall was 2.86 inches between 4:00-5:00 pm. |
| MergedSources | [{"id":"iem_E_32.140_-81.250_1779916800000","source":"iem","severity":"low","severityValue":25,"timestamp":1779916800000,"latitude":32.14,"longitude":-81.25},{"id":"iem_R_32.240_-81.150_1779918300000","source":"iem","severity":"low","severityValue":25,"timestamp":1779918300000,"latitude":32.24,"longitude":-81.15},{"id":"iem_F_32.140_-81.250_1779919200000","source":"iem","severity":"low","severityValue":25,"timestamp":1779919200000,"latitude":32.14,"longitude":-81.25},{"id":"iem_F_32.130_-81.250_1779918060000","source":"iem","severity":"low","severityValue":25,"timestamp":1779918060000,"latitude":32.13,"longitude":-81.25},{"id":"iem_R_32.250_-81.150_1779919200000","source":"iem","severity":"low","severityValue":25,"timestamp":1779919200000,"latitude":32.25,"longitude":-81.15}] |
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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