This alert expired on 25 May 2026 at 02:45 UTC. It is kept here as a record.
It is the 11th strongest of the 69 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 17 March 2026.
What the source measured
NOAA reported: Flash Flood Warning issued May 24 at 8:42PM EDT until May 24 at 10:45PM EDT by NWS Pittsburgh PA
An estimated 95,476 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 18, 2026 · score 43 · 10.7 km
- August 11, 2026 · score 67 · 15.0 km
- May 27, 2026 · score 39 · 16.1 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 89 % 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) | 39 / 100 |
| Our confidence | 89% |
| Coordinates | 38.6149, -82.0824 |
| Nearest City | Huntington (39 km) |
| Population Exposed | 95.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-25T00:42:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.cbea56b9e47d4d2b8a4706694829fc6d |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Columbiana, OH; Armstrong, PA; Beaver, PA; Butler, PA; Clarion, PA; Lawrence, PA; Mercer, PA; Venango, PA; Belmont, OH; Guernsey, OH; Harrison, OH; Muskingum, OH; Noble, OH and 13 more areas |
| Headline | Flash Flood Warning issued May 24 at 8:42PM EDT until May 24 at 10:45PM EDT by NWS Pittsburgh PA |
| Expires | 2026-05-24T22:45:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 16 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.cbea56b9e47d4d2b8a4706694829fc6d5feea827.001.1","noaa_urn:oid:2.49.0.1.840.0.503c0f7073d4984026510ea881ea7a428ba275ef.001.1","noaa_urn:oid:2.49.0.1.840.0.3312fe1f825a40f41762085dbe7136d8c0cb5742.001.1","noaa_urn:oid:2.49.0.1.840.0.5b164e3e5261909b24d9de00506b0883abb38ba5.001.1","noaa_urn:oid:2.49.0.1.840.0.f288a128fdc168e48e855c0cc50ba8c110805cae.001.1","noaa_urn:oid:2.49.0.1.840.0.b746af59214237ef0cf4aeb568c6ae031b75bf48.001.1","noaa_urn:oid:2.49.0.1.840.0.d7065a8937771ff2f81c69234ac2eb009762a18d.001.1","noaa_urn:oid:2.49.0.1.840.0.f1fda1a85ad37e9c273f51a7e52691b394735965.001.1","noaa_urn:oid:2.49.0.1.840.0.4a53f4905534919fdf611d43c04298c92f0b8ff7.001.1","noaa_urn:oid:2.49.0.1.840.0.df20709ac9983f31d912e14f47aed83f7f822012.001.1","noaa_urn:oid:2.49.0.1.840.0.d884133e589e578d4dcf55f2d281e6d0bbe7bdcc.001.1","noaa_urn:oid:2.49.0.1.840.0.f5870ad186252d909efdfad1fe2ffd2cf2ebaf8d.001.1","noaa_urn:oid:2.49.0.1.840.0.07cdc1edc2f19b33face2fb9065b1b2a959933f9.001.1","noaa_urn:oid:2.49.0.1.840.0.d1556efc5219b0a51f62db52ae5cf93e3bf400a2.001.1","noaa_urn:oid:2.49.0.1.840.0.d48d660ed2320436e2b512370a0c37aa7a00c7e4.001.1","noaa_urn:oid:2.49.0.1.840.0.8c7464ea075f2c314450ac11dcd4b171ecc8e953.001.1"] |
| Iem TypeSummary | R |
| Iem Magnitude | 0.75 |
| Iem Unit | Inch |
| Iem City | Middleport |
| Iem County | Meigs |
| Iem State | OH |
| Iem Wfo | RLX |
| Iem Remark | Reported by Trained Spotter. |
| MergedSources | [{"id":"iem_E_38.560_-82.910_1779660420000","source":"iem","severity":"low","severityValue":25,"timestamp":1779660420000,"latitude":38.56,"longitude":-82.91},{"id":"iem_R_38.760_-81.760_1779665820000","source":"iem","severity":"low","severityValue":25,"timestamp":1779665820000,"latitude":38.76,"longitude":-81.76},{"id":"iem_R_39.050_-82.640_1779655860000","source":"iem","severity":"low","severityValue":25,"timestamp":1779655860000,"latitude":39.05,"longitude":-82.64},{"id":"iem_R_39.000_-82.050_1779664080000","source":"iem","severity":"low","severityValue":25,"timestamp":1779664080000,"latitude":39,"longitude":-82.05}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 39/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.