Right now
The most recent data we hold from NOAA arrived 2 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 7 August 2026 at 23:15 UTC. It is kept here as a record.
It is the 35th strongest of the 101 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 7 at 4:03PM EDT until August 7 at 7:15PM EDT by NWS Pittsburgh PA
Urban PEI: 103,721 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- August 7, 2026 · score 37 · 0.0 km
- September 4, 2026 · score 49 · 5.5 km
- September 3, 2026 · score 32 · 6.1 km
How we know
7 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 37 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) | 37 / 100 |
| Legacy data-support index | 0.89/1 |
| Coordinates | 40.2168, -80.6115 |
| Nearest City | Steubenville (17 km) |
| Urban exposure index (PEI) | 103.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-07T20:03:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.c0abb43269508217c4af02fff1f4606f |
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: 2026-08-07T20:03:00.000Z.
First archived: 2026-08-07T20:20:12.295Z. 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 | Allegheny, PA; Jefferson, OH; Washington, PA; Brooke, WV; Hancock, WV; Monroe, OH; Noble, OH |
| Headline | Flash Flood Warning issued August 7 at 4:03PM EDT until August 7 at 7:15PM EDT by NWS Pittsburgh PA |
| Expires | 2026-08-07T19:15:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c0abb43269508217c4af02fff1f4606f7102be23.001.1","noaa_urn:oid:2.49.0.1.840.0.c89427ca1793ca284011f810d454c9a2d13d67f0.001.1","noaa_urn:oid:2.49.0.1.840.0.2018767dbbaf74ddc0b37262658202c5802d39eb.001.1"] |
| Iem TypeSummary | F |
| Iem City | 2 NNW Follansbee |
| Iem County | Brooke |
| Iem State | WV |
| Iem Wfo | PBZ |
| Iem Remark | Corrects previous flood report from 2 NNW Follansbee. Several roads closed due to flooding between Steubenville to Follansbee. |
| MergedSources | [{"id":"iem_F_40.240_-79.970_1786119300000","source":"iem","severity":"low","severityValue":25,"timestamp":1786119300000,"latitude":40.24,"longitude":-79.97},{"id":"iem_E_40.360_-80.600_1786130160000","source":"iem","severity":"low","severityValue":25,"timestamp":1786130160000,"latitude":40.36,"longitude":-80.6},{"id":"iem_F_40.350_-80.610_1786130700000","source":"iem","severity":"low","severityValue":25,"timestamp":1786130700000,"latitude":40.35,"longitude":-80.61},{"id":"iem_F_40.230_-80.000_1786121400000","source":"iem","severity":"low","severityValue":25,"timestamp":1786121400000,"latitude":40.23,"longitude":-80},{"id":"iem_E_40.380_-80.560_1786129560000","source":"iem","severity":"low","severityValue":25,"timestamp":1786129560000,"latitude":40.38,"longitude":-80.56},{"id":"iem_F_40.360_-80.600_1786130160000","source":"iem","severity":"low","severityValue":25,"timestamp":1786130160000,"latitude":40.36,"longitude":-80.6}] |
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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