This alert expired on 11 August 2026 at 04:32 UTC. It is kept here as a record.
No stronger detection stands among the 61 recorded within 20 km of this point since 16 March 2026 — 7 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: Severe Thunderstorm Warning issued August 11 at 12:25AM EDT until August 11 at 12:30AM EDT by NWS Burlington VT
An estimated 78,229 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 16, 2026 · score 39 · 14.3 km
- June 20, 2026 · score 39 · 17.4 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 91 % 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) | 39 / 100 |
| Our confidence | 91% |
| Coordinates | 44.2840, -72.9000 |
| Nearest City | South Burlington (30 km) |
| Population Exposed | 78.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T04:25:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Essex, NY; Addison, VT; Caledonia, VT; Chittenden, VT; Orange, VT; Washington, VT |
| Headline | Severe Thunderstorm Warning issued August 11 at 12:25AM EDT until August 11 at 12:30AM EDT by NWS Burlington VT |
| Expires | 2026-08-11T00:32:00-04:00 |
| SenderName | NWS Burlington VT |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | 1 S Fonda |
| Iem County | Franklin |
| Iem State | VT |
| Iem Wfo | BTV |
| Iem Remark | Tress down. |
| MergedSources | [{"id":"iem_D_44.810_-73.080_1786404780000","source":"iem","severity":"low","severityValue":25,"timestamp":1786404780000,"latitude":44.81,"longitude":-73.08},{"id":"iem_D_44.810_-73.090_1786404600000","source":"iem","severity":"low","severityValue":25,"timestamp":1786404600000,"latitude":44.81,"longitude":-73.09},{"id":"iem_D_44.860_-73.180_1786404000000","source":"iem","severity":"low","severityValue":25,"timestamp":1786404000000,"latitude":44.86,"longitude":-73.18},{"id":"iem_D_44.860_-73.090_1786404360000","source":"iem","severity":"low","severityValue":25,"timestamp":1786404360000,"latitude":44.86,"longitude":-73.09},{"id":"iem_D_44.860_-73.100_1786404240000","source":"iem","severity":"low","severityValue":25,"timestamp":1786404240000,"latitude":44.86,"longitude":-73.1}] |
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.
Calamity.live data shows a weather event with CalamityScore 39/100, near South Burlington (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.