Right now
The most recent data we hold from NOAA arrived 40 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 18 June 2026 at 21:15 UTC. It is kept here as a record.
No stronger detection stands among the 47 recorded within 20 km of this point since 17 March 2026 — 6 others scored the same. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 18 at 5:01PM EDT until June 18 at 5:15PM EDT by NWS Gray ME
Urban PEI: 189,720 within a heuristic 50 km radius; not unique people.
Nearby, since 17 March 2026
- June 18, 2026 · score 43 · 0.0 km
- July 16, 2026 · score 43 · 2.5 km
- July 16, 2026 · score 43 · 16.1 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.84/1 |
| Coordinates | 43.2572, -70.7266 |
| Nearest City | Dover (13 km) |
| Urban exposure index (PEI) | 189.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-18T21:01:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.926e3b81557ac5ae7dcd97cc1c1bb319 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-18T21:01:00.000Z.
First archived: 2026-06-18T21:05:32.970Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cumberland, ME; York, ME; Rockingham, NH; Strafford, NH; Cumberland, ME; York, ME; York, ME; Hillsborough, NH; Rockingham, NH; Strafford, NH |
| Headline | Severe Thunderstorm Warning issued June 18 at 5:01PM EDT until June 18 at 5:15PM EDT by NWS Gray ME |
| Expires | 2026-06-18T17:15:00-04:00 |
| SenderName | NWS Gray ME |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.926e3b81557ac5ae7dcd97cc1c1bb319601b3a21.002.1","noaa_urn:oid:2.49.0.1.840.0.4e70ec03974d8667d47198bbb0e9fa96c449d148.001.1","noaa_urn:oid:2.49.0.1.840.0.f7b7648785d8b31fd27c09d95eb5d6bed4efe2d8.001.1"] |
| Iem TypeSummary | D |
| Iem City | 1 NE Sanbornton |
| Iem County | Belknap |
| Iem State | NH |
| Iem Wfo | GYX |
| Iem Remark | Tree down blocking Hunkins Hill Rd in Sanbornton. Time estimated by radar. |
| MergedSources | [{"id":"iem_D_43.500_-71.570_1781812500000","source":"iem","severity":"low","severityValue":25,"timestamp":1781812500000,"latitude":43.5,"longitude":-71.57}] |
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.
Review the area, threshold and delivery channel in your account.
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