Right now
The most recent data we hold from NOAA arrived 6 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
9 other detections within 20 km in the last 24 hours, the nearest 11 km from here.
This alert expired on 22 July 2026 at 01:30 UTC. It is kept here as a record.
It is the 23rd strongest of the 184 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 21 at 7:07PM EDT until July 21 at 9:30PM EDT by NWS Pittsburgh PA
Urban PEI: 56,035 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- September 4, 2026 · score 28 · 5.3 km
- September 12, 2026 · score 28 · 7.4 km
- August 7, 2026 · score 28 · 14.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 32 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) | 32 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 38.9781, -81.9534 |
| Nearest City | Athens (41 km) |
| Urban exposure index (PEI) | 56.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T23:07:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.1018b09bb0d747133263dabf8f21b542 |
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: 2026-07-21T23:07:00.000Z.
First archived: 2026-07-21T23:09:43.787Z. 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; Muskingum, OH; Noble, OH; Lewis, WV; Upshur, WV; Lewis, WV; Randolph, WV; Upshur, WV and 20 more areas |
| Headline | Flash Flood Warning issued July 21 at 7:07PM EDT until July 21 at 9:30PM EDT by NWS Pittsburgh PA |
| Expires | 2026-07-21T21:30:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 23 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1018b09bb0d747133263dabf8f21b542898622ba.001.1","noaa_urn:oid:2.49.0.1.840.0.69f3916c73d5ba5628e4a4fe9a4a008039d6e6c2.001.1","noaa_urn:oid:2.49.0.1.840.0.e326ccabfbf7785b5ed8ebeae76bda413caefb58.001.1","noaa_urn:oid:2.49.0.1.840.0.8cac40750f4b722ed25e33137c3a04c5fcc4436c.001.1","noaa_urn:oid:2.49.0.1.840.0.dc2c72d9fe9f822461abf71d63d6a97751d3aaa9.001.1","noaa_urn:oid:2.49.0.1.840.0.46f9aca37f309f4364431cfe158d550e093006ed.001.1","noaa_urn:oid:2.49.0.1.840.0.0ea897dc2da18c1bee0ee72d9e0e0bfc8b1f0028.001.1","noaa_urn:oid:2.49.0.1.840.0.f5b3be117e0a1d8d9c890f12cf52b4cf1ff9e2fc.001.1","noaa_urn:oid:2.49.0.1.840.0.d2619698217291f625afea6a23ee03ffed76614c.001.1","noaa_urn:oid:2.49.0.1.840.0.865667c8c1d9d4ace9beb39a2f6493838547a8cb.001.1","noaa_urn:oid:2.49.0.1.840.0.3831cbd24661c64b573d64b21f85479dc3fb475e.001.1","noaa_urn:oid:2.49.0.1.840.0.f72503ad796d25317ee82028bd5a4ee43ac32623.001.1","noaa_urn:oid:2.49.0.1.840.0.ba8b370719464b808974dd8d631a4e47fcf8b4b1.001.1","noaa_urn:oid:2.49.0.1.840.0.eee25d424baebf594080174199a9d605b2771796.001.1","noaa_urn:oid:2.49.0.1.840.0.ab10467be9dfbec978f97f7588f7fe87521cdaa2.001.1","noaa_urn:oid:2.49.0.1.840.0.fee76dab32cf26866c8184e41fe85418b7b5b317.001.1","noaa_urn:oid:2.49.0.1.840.0.8c1e59812a53989e3f27d1525e37934f436aa48d.001.1","noaa_urn:oid:2.49.0.1.840.0.7938767b5910e29b37a90380eba062e5502b9879.001.1","noaa_urn:oid:2.49.0.1.840.0.e97289469902cf9dde5601905760448071817476.001.1","noaa_urn:oid:2.49.0.1.840.0.99aeb9a8dac3fc3014380e4cc4f0383891c0d9c1.001.1","noaa_urn:oid:2.49.0.1.840.0.d938468713693cf4888ee93c414b46ba46c1f4f7.001.1","noaa_urn:oid:2.49.0.1.840.0.87350dab71158f3e0ec97e90a1e3ca4f8ffd64b1.001.1","noaa_urn:oid:2.49.0.1.840.0.bc24a509fd5e015ed0e02cfd3b3fe33371d8b7ea.001.1"] |
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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