This alert expired on 19 June 2026 at 04:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 15 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 7 June 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued June 18 at 12:09PM EDT until June 19 at 11:11AM EDT by NWS Gray ME
Nearby, since 17 March 2026
- August 3, 2026 · score 22 · 25.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 60 % 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) | 22 / 100 |
| Our confidence | 60% |
| Coordinates | 43.9920, -71.6940 |
| Nearest City | Laconia (54 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-19T04:30:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.633ae0d023fbf8752f400bca76b6c136f996108b.001.1 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Grafton, NH |
| Headline | Flood Warning issued June 18 at 12:09PM EDT until June 19 at 11:11AM EDT by NWS Gray ME |
| Expires | 2026-06-19T00:15:00-04:00 |
| SenderName | NWS Gray ME |
| HasExactCoords | true |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.