This alert expired on 11 August 2026 at 22:46 UTC. It is kept here as a record.
No stronger detection stands among the 93 recorded within 20 km of this point since 16 March 2026 — 12 others scored the same. Another comparable one was recorded here earlier the same day. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 11 at 6:36PM EDT until August 11 at 6:45PM EDT by NWS Charleston SC
An estimated 280,390 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 5, 2026 · score 43 · 10.6 km
- August 10, 2026 · score 43 · 13.1 km
- May 27, 2026 · score 43 · 14.0 km
How we know
Confirmed by 5 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.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 90% |
| Coordinates | 32.1614, -81.0500 |
| Nearest City | Savannah (10 km) |
| Population Exposed | 280.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T22:36:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.772ab2b62835d5d50af50e16650e7af15cdbc5f8.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Chatham, GA; Beaufort, SC; Jasper, SC |
| Headline | Severe Thunderstorm Warning issued August 11 at 6:36PM EDT until August 11 at 6:45PM EDT by NWS Charleston SC |
| Expires | 2026-08-11T18:46:00-04:00 |
| SenderName | NWS Charleston SC |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 2.92 |
| Iem Unit | inch |
| Iem City | 2 N Allenhurst |
| Iem County | Liberty |
| Iem State | GA |
| Iem Wfo | CHS |
| Iem Remark | A personal weather station located along Desert Storm Dr measured 2.92 inches of rain since 3:24 PM. |
| MergedSources | [{"id":"iem_R_32.250_-80.940_1786483800000","source":"iem","severity":"low","severityValue":25,"timestamp":1786483800000,"latitude":32.25,"longitude":-80.94},{"id":"iem_G_32.130_-81.200_1786478700000","source":"iem","severity":"low","severityValue":25,"timestamp":1786478700000,"latitude":32.13,"longitude":-81.2},{"id":"iem_G_32.500_-80.990_1786480500000","source":"iem","severity":"low","severityValue":25,"timestamp":1786480500000,"latitude":32.5,"longitude":-80.99},{"id":"iem_R_31.810_-81.610_1786482240000","source":"iem","severity":"low","severityValue":25,"timestamp":1786482240000,"latitude":31.81,"longitude":-81.61}] |
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 Savannah?
Calamity.live data shows a weather event with CalamityScore 43/100, near Savannah (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.