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.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 20 September 2026 at 17:30 UTC. It is kept here as a record.
It is the 39th strongest of the 124 detections recorded within 20 km of this point since 15 March 2026. 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 September 20 at 11:42AM EDT until September 20 at 1:30PM EDT by NWS Pittsburgh PA
Urban PEI: 84,492 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- September 2, 2026 · score 32 · 8.0 km
- July 4, 2026 · score 39 · 8.4 km
- September 3, 2026 · score 32 · 9.2 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
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 v5. 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 | 0.87/1 |
| Coordinates | 40.2076, -80.7469 |
| Nearest City | Wheeling (17 km) |
| Urban exposure index (PEI) | 84.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-20T15:42:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.31beba1e68848c9bb508cc343e3baf5ccf67797e.001.1 |
Physical priority index · v5. 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: 2026-09-20T15:42:00.000Z.
First archived: 2026-09-20T15:45:19.492Z. 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 | Washington, PA; Belmont, OH; Guernsey, OH; Harrison, OH; Jefferson, OH; Tuscarawas, OH |
| Headline | Flash Flood Warning issued September 20 at 11:42AM EDT until September 20 at 1:30PM EDT by NWS Pittsburgh PA |
| Expires | 2026-09-20T13:30:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.31beba1e68848c9bb508cc343e3baf5ccf67797e.001.1","noaa_urn:oid:2.49.0.1.840.0.167f7b8675012628a6a2f58e1bfb8b52b3358b03.001.1"] |
| Iem TypeSummary | R |
| Iem Magnitude | 2.1 |
| Iem Unit | Inch |
| Iem City | 3 N Saint Clairsville |
| Iem County | Belmont |
| Iem State | OH |
| Iem Wfo | PBZ |
| Iem Remark | 1.80 of rain since 7 am this morning. |
| MergedSources | [{"id":"iem_F_40.180_-81.440_1789914960000","source":"iem","severity":"low","severityValue":25,"timestamp":1789914960000,"latitude":40.18,"longitude":-81.44},{"id":"iem_R_40.120_-80.880_1789914780000","source":"iem","severity":"low","severityValue":25,"timestamp":1789914780000,"latitude":40.12,"longitude":-80.88}] |
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.
Want to know when something happens near Wheeling?