Right now
The most recent data we hold from NOAA arrived 28 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
23 other detections within 20 km in the last 24 hours, the nearest 4 km from here.
This alert expired on 25 May 2026 at 00:15 UTC. It is kept here as a record.
No stronger detection stands among the 164 recorded within 20 km of this point since 16 March 2026 — 51 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 24 at 5:18PM EDT until May 24 at 8:15PM EDT by NWS Pittsburgh PA
An estimated 64,810 people live within 50 km of this point.
Nearby, since 16 March 2026
- August 12, 2026 · score 39 · 8.2 km
- August 13, 2026 · score 39 · 10.5 km
- August 11, 2026 · score 39 · 11.4 km
How we know
Confirmed by 3 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 | 39.4403, -82.1437 |
| Nearest City | Athens (13 km) |
| Population Exposed | 64.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-24T21:18:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.034c0cb4a8cbfe9451a309ae7f6e2bf6 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Guernsey, OH; Harrison, OH; Muskingum, OH; Noble, OH; Gallia, OH; Jackson, OH; Meigs, OH; Vinton, OH; Athens, OH; Meigs, OH and 1 more areas |
| Headline | Flash Flood Warning issued May 24 at 5:18PM 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 | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.034c0cb4a8cbfe9451a309ae7f6e2bf693fcf14c.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"] |
| 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_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.
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