Right now
The most recent data we hold from NOAA arrived 41 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 25 May 2026 at 00:15 UTC. It is kept here as a record.
It is the 13th strongest of the 133 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 24 at 6:59PM EDT until May 24 at 8:15PM EDT by NWS Pittsburgh PA
Urban PEI: 25,044 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- September 10, 2026 · score 32 · 7.2 km
- September 12, 2026 · score 28 · 10.8 km
- July 18, 2026 · score 34 · 15.2 km
How we know
4 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 34 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) | 34 / 100 |
| Legacy data-support index | 0.89/1 |
| Coordinates | 39.0845, -82.1075 |
| Nearest City | Athens (27 km) |
| Urban exposure index (PEI) | 25.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-24T22:59:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.85fb74e8441b4ace56d483d659e9ee69 |
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: 2026-05-24T22:59:00.000Z.
First archived: 2026-05-24T23:07:24.940Z. 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 | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Guernsey, OH; Harrison, OH; Muskingum, OH; Noble, OH; Belmont, OH; Gallia, OH; Lawrence, OH; Cabell, WV; Mason, WV and 9 more areas |
| Headline | Flash Flood Warning issued May 24 at 6:59PM EDT until May 24 at 8:15PM EDT by NWS Pittsburgh PA |
| Expires | 2026-05-24T20:15:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 12 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.85fb74e8441b4ace56d483d659e9ee69a23f34ae.001.1","noaa_urn:oid:2.49.0.1.840.0.f3605d6f34903b52f1ec1c3bcddf2f73d59f49a6.001.1","noaa_urn:oid:2.49.0.1.840.0.f1fda1a85ad37e9c273f51a7e52691b394735965.001.1","noaa_urn:oid:2.49.0.1.840.0.1236879c6c9aa38d9b168bc7d2e9cca414cf1026.001.1","noaa_urn:oid:2.49.0.1.840.0.4a53f4905534919fdf611d43c04298c92f0b8ff7.001.1","noaa_urn:oid:2.49.0.1.840.0.581f40c00cd0fbdb4398296bacee5cadc890ba46.001.1","noaa_urn:oid:2.49.0.1.840.0.e41a7282579a02f3473100349622700669ce04e0.001.1","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:2.49.0.1.840.0.5257a4443e8cdc77dbacc02b6e1320b6a3364cae.001.1","noaa_urn:oid:2.49.0.1.840.0.b5949b45ba8733912c1a042f0f3d17d86d11cd06.001.1"] |
| Iem TypeSummary | E |
| Iem City | 1 SSE Junction City |
| Iem County | Perry |
| Iem State | OH |
| Iem Wfo | RLX |
| Iem Remark | SR 668 is closed due to flooding. |
| MergedSources | [{"id":"iem_E_39.190_-82.880_1779657900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779657900000,"latitude":39.19,"longitude":-82.88},{"id":"iem_R_39.050_-82.640_1779655860000","source":"iem","severity":"low","severityValue":25,"timestamp":1779655860000,"latitude":39.05,"longitude":-82.64},{"id":"iem_E_39.710_-82.290_1779656340000","source":"iem","severity":"low","severityValue":25,"timestamp":1779656340000,"latitude":39.71,"longitude":-82.29}] |
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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