This alert expired on 25 May 2026 at 02:49 UTC. It is kept here as a record.
It is the 4th strongest of the 56 detections recorded within 20 km of this point since 13 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 24 at 10:39PM EDT until May 24 at 10:45PM EDT by NWS Pittsburgh PA
An estimated 16,152 people live within 50 km of this point.
Nearby, since 13 March 2026
- September 2, 2026 · score 16 · 10.4 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 34 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) | 34 / 100 |
| Our confidence | 89% |
| Coordinates | 39.0390, -80.8157 |
| Nearest City | Clarksburg (49 km) |
| Population Exposed | 16.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-25T02:39:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.fd8b11a1a16ad1a5ed0023bcd4fe86be |
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; Allegheny, PA; Butler, PA; Harrison, WV; Lewis, WV and 5 more areas |
| Headline | Flash Flood Warning issued May 24 at 10:39PM EDT until May 24 at 10:45PM EDT by NWS Pittsburgh PA |
| Expires | 2026-05-24T22:49:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.fd8b11a1a16ad1a5ed0023bcd4fe86bed3c2f704.001.1","noaa_urn:oid:2.49.0.1.840.0.72ca4fbc19e8ecb443fc4b2f2bdc775da287b8fe.001.1","noaa_urn:oid:2.49.0.1.840.0.6138b48d4cd3e41b3905eab8bcec755a0e4fc402.001.1","noaa_urn:oid:2.49.0.1.840.0.1af170b701d5b13e88dfccf42984779ea3a2c421.001.1","noaa_urn:oid:2.49.0.1.840.0.88e8b50325f5d62c56bbe54730d827b9e313b61d.001.1","noaa_urn:oid:2.49.0.1.840.0.d48d660ed2320436e2b512370a0c37aa7a00c7e4.001.1","noaa_urn:oid:2.49.0.1.840.0.f288a128fdc168e48e855c0cc50ba8c110805cae.001.1","noaa_urn:oid:2.49.0.1.840.0.b746af59214237ef0cf4aeb568c6ae031b75bf48.001.1"] |
| Iem TypeSummary | E |
| Iem City | 1 WSW Clarksburg |
| Iem County | Harrison |
| Iem State | WV |
| Iem Wfo | RLX |
| Iem Remark | Water a foot deep in a residential basement. |
| MergedSources | [{"id":"iem_F_39.020_-80.690_1779674700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779674700000,"latitude":39.02,"longitude":-80.69},{"id":"iem_F_38.860_-80.940_1779671700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779671700000,"latitude":38.86,"longitude":-80.94},{"id":"iem_F_38.870_-80.830_1779671820000","source":"iem","severity":"low","severityValue":25,"timestamp":1779671820000,"latitude":38.87,"longitude":-80.83},{"id":"iem_E_39.270_-80.360_1779674220000","source":"iem","severity":"low","severityValue":25,"timestamp":1779674220000,"latitude":39.27,"longitude":-80.36}] |
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 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.