Right now
The most recent data we hold from NOAA arrived 8 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 15 May 2026 at 11:45 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 14 May 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued May 14 at 7:34PM EDT until May 15 at 11:35AM EDT by NWS Gray ME
Nearby, since 17 March 2026
- June 19, 2026 · score 22 · 0.0 km
- August 3, 2026 · score 22 · 25.5 km
How we know
23 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 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) | 22 / 100 |
| Legacy data-support index | 0.70/1 |
| Coordinates | 43.9920, -71.6940 |
| Nearest City | Laconia (54 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-05-15T03:00:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.859713e6fc2e083b93bc04815c5987a949d216fa.001.1 |
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: 2026-05-15T03:00:00.000Z.
First archived: 2026-05-15T06:56:16.367Z. 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 | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Grafton, NH |
| Headline | Flood Warning issued May 14 at 7:34PM EDT until May 15 at 11:35AM EDT by NWS Gray ME |
| Expires | 2026-05-15T07:45:00-04:00 |
| SenderName | NWS Gray ME |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 2.3 |
| Iem Unit | Inch |
| Iem City | 1 S New London |
| Iem County | Merrimack |
| Iem State | NH |
| Iem Wfo | GYX |
| Iem Remark | Mesonet station EW7356 New London. Storm total thus far. |
| MergedSources | [{"id":"iem_R_43.660_-71.730_1778796900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796900000,"latitude":43.66,"longitude":-71.73},{"id":"iem_R_43.590_-71.740_1778796900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796900000,"latitude":43.59,"longitude":-71.74},{"id":"iem_R_43.980_-71.140_1778796780000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796780000,"latitude":43.98,"longitude":-71.14},{"id":"iem_R_43.810_-72.140_1778797200000","source":"iem","severity":"low","severityValue":25,"timestamp":1778797200000,"latitude":43.81,"longitude":-72.14},{"id":"iem_R_43.430_-71.880_1778797200000","source":"iem","severity":"low","severityValue":25,"timestamp":1778797200000,"latitude":43.43,"longitude":-71.88},{"id":"iem_R_43.860_-71.400_1778796900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796900000,"latitude":43.86,"longitude":-71.4},{"id":"iem_R_43.430_-71.620_1778796900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796900000,"latitude":43.43,"longitude":-71.62},{"id":"iem_R_43.660_-71.230_1778796720000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796720000,"latitude":43.66,"longitude":-71.23},{"id":"iem_R_43.840_-71.700_1778797020000","source":"iem","severity":"low","severityValue":25,"timestamp":1778797020000,"latitude":43.84,"longitude":-71.7},{"id":"iem_R_43.660_-71.490_1778796900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796900000,"latitude":43.66,"longitude":-71.49},{"id":"iem_R_43.400_-71.640_1778793540000","source":"iem","severity":"low","severityValue":25,"timestamp":1778793540000,"latitude":43.4,"longitude":-71.64},{"id":"iem_R_43.890_-71.660_1778797140000","source":"iem","severity":"low","severityValue":25,"timestamp":1778797140000,"latitude":43.89,"longitude":-71.66},{"id":"iem_R_43.750_-71.660_1778796900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796900000,"latitude":43.75,"longitude":-71.66},{"id":"iem_R_43.810_-71.340_1778796900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796900000,"latitude":43.81,"longitude":-71.34},{"id":"iem_R_43.760_-71.560_1778796900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796900000,"latitude":43.76,"longitude":-71.56},{"id":"iem_R_43.620_-71.720_1778796900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796900000,"latitude":43.62,"longitude":-71.72},{"id":"iem_R_44.120_-71.960_1778796900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796900000,"latitude":44.12,"longitude":-71.96},{"id":"iem_R_43.440_-71.510_1778797020000","source":"iem","severity":"low","severityValue":25,"timestamp":1778797020000,"latitude":43.44,"longitude":-71.51},{"id":"iem_R_44.090_-71.140_1778796900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796900000,"latitude":44.09,"longitude":-71.14},{"id":"iem_R_43.610_-72.120_1778796900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796900000,"latitude":43.61,"longitude":-72.12},{"id":"iem_R_43.700_-71.470_1778796900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796900000,"latitude":43.7,"longitude":-71.47},{"id":"iem_R_43.400_-71.990_1778796900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778796900000,"latitude":43.4,"longitude":-71.99}] |
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 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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