Right now
The most recent data we hold from NOAA arrived 2 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 1 July 2026 at 03:30 UTC. It is kept here as a record.
It is the 4th strongest of the 27 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 30 at 11:04PM EDT until June 30 at 11:30PM EDT by NWS Burlington VT
An estimated 23,886 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 28, 2026 · score 34 · 5.9 km
- July 9, 2026 · score 34 · 12.1 km
- June 30, 2026 · score 39 · 16.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 81 % 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) | 34 / 100 |
| Our confidence | 81% |
| Coordinates | 44.4269, -75.6342 |
| Nearest City | Brockville (19 km) |
| Population Exposed | 23.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-01T03:04:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.aa5d6838ffd89afaebb19269b36ffb24 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | St. Lawrence, NY; Jefferson, NY; Lewis, NY |
| Headline | Severe Thunderstorm Warning issued June 30 at 11:04PM EDT until June 30 at 11:30PM EDT by NWS Burlington VT |
| Expires | 2026-06-30T23:30:00-04:00 |
| SenderName | NWS Burlington VT |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.aa5d6838ffd89afaebb19269b36ffb246add6990.001.1","noaa_urn:oid:2.49.0.1.840.0.c1d939c4393a5d591e65ec57d18c522b27ff2bf6.001.1"] |
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 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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