This alert expired on 18 June 2026 at 23:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 77 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 18 at 5:55PM EDT until June 18 at 7:00PM EDT by NWS Boston/Norton MA
An estimated 1,127,622 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 7, 2026 · score 48 · 2.8 km
- May 19, 2026 · score 48 · 6.5 km
- March 17, 2026 · score 52 · 7.4 km
How we know
Confirmed by 16 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 89 % 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) | 52 / 100 |
| Our confidence | 89% |
| Coordinates | 42.1940, -71.8100 |
| Nearest City | Auburn (3 km) |
| Population Exposed | 1.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-18T21:55:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.02cc5ee2fe59240485fef23a2dd94f448f311f29.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Middlesex, MA; Norfolk, MA; Worcester, MA |
| Headline | Severe Thunderstorm Warning issued June 18 at 5:55PM EDT until June 18 at 7:00PM EDT by NWS Boston/Norton MA |
| Expires | 2026-06-18T19:00:00-04:00 |
| SenderName | NWS Boston/Norton MA |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | 2 WSW Erving |
| Iem County | Franklin |
| Iem State | MA |
| Iem Wfo | BOX |
| Iem Remark | Tree down on wires on Farley Road. Report relayed by amateur radio. |
| Google News RssFeed | weather |
| Google News SourceName | The Boston Globe |
| MergedSources | [{"id":"iem_D_42.690_-72.040_1781814300000","source":"iem","severity":"low","severityValue":25,"timestamp":1781814300000,"latitude":42.69,"longitude":-72.04},{"id":"iem_D_42.790_-71.950_1781814180000","source":"iem","severity":"low","severityValue":25,"timestamp":1781814180000,"latitude":42.79,"longitude":-71.95},{"id":"iem_D_42.690_-72.330_1781813400000","source":"iem","severity":"low","severityValue":25,"timestamp":1781813400000,"latitude":42.69,"longitude":-72.33},{"id":"iem_D_42.410_-71.960_1781816760000","source":"iem","severity":"low","severityValue":25,"timestamp":1781816760000,"latitude":42.41,"longitude":-71.96},{"id":"iem_D_42.700_-71.820_1781815200000","source":"iem","severity":"low","severityValue":25,"timestamp":1781815200000,"latitude":42.7,"longitude":-71.82},{"id":"iem_D_42.580_-72.440_1781814000000","source":"iem","severity":"low","severityValue":25,"timestamp":1781814000000,"latitude":42.58,"longitude":-72.44},{"id":"gnews_weather_494948_131","source":"google_news","severity":"medium","severityValue":40,"timestamp":1781815094000,"latitude":42.36,"longitude":-71.06},{"id":"gnews_weather_494944_134","source":"google_news","severity":"medium","severityValue":40,"timestamp":1781800384000,"latitude":42.36,"longitude":-71.06},{"id":"gnews_weather_494944_135","source":"google_news","severity":"medium","severityValue":40,"timestamp":1781799480000,"latitude":42.36,"longitude":-71.06},{"id":"gnews_weather_494949_146","source":"google_news","severity":"medium","severityValue":40,"timestamp":1781818209000,"latitude":42.36,"longitude":-71.06},{"id":"gnews_weather_494946_156","source":"google_news","severity":"medium","severityValue":40,"timestamp":1781806310000,"latitude":42.36,"longitude":-71.06},{"id":"gnews_weather_494948_158","source":"google_news","severity":"medium","severityValue":40,"timestamp":1781815695000,"latitude":42.36,"longitude":-71.06},{"id":"gnews_weather_494949_159","source":"google_news","severity":"medium","severityValue":40,"timestamp":1781817075000,"latitude":42.36,"longitude":-71.06},{"id":"gnews_weather_494946_161","source":"google_news","severity":"medium","severityValue":40,"timestamp":1781809095000,"latitude":42.36,"longitude":-71.06},{"id":"gnews_weather_494948_162","source":"google_news","severity":"medium","severityValue":40,"timestamp":1781814941000,"latitude":42.36,"longitude":-71.06}] |
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 Auburn?
Calamity.live data shows a weather event with CalamityScore 52/100, near Auburn (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.