Right now
The most recent data we hold from NOAA arrived 3 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 13 September 2026 at 03:15 UTC. It is kept here as a record.
It is the 23rd strongest of the 75 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 4 September 2026. 19 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 12 at 9:19PM EDT until September 12 at 11:15PM EDT by NWS Pittsburgh PA
Urban PEI: 28,098 within a heuristic 50 km radius; not unique people.
Nearby, since 17 March 2026
- June 20, 2026 · score 34 · 9.0 km
- June 14, 2026 · score 39 · 10.9 km
- July 8, 2026 · score 22 · 16.8 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 28 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 v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 28 / 100 |
| Legacy data-support index | 0.91/1 |
| Coordinates | 41.0207, -79.7447 |
| Nearest City | Cranberry Township (49 km) |
| Urban exposure index (PEI) | 28.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-13T01:19:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.89b51bdef98461587c215692f002b925e9890c81.001.1 |
Physical priority index · v4 (historical). 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: 2026-09-13T01:19:00.000Z.
First archived: 2026-09-13T01:23:01.560Z. 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 | Armstrong, PA; Butler, PA |
| Headline | Flash Flood Warning issued September 12 at 9:19PM EDT until September 12 at 11:15PM EDT by NWS Pittsburgh PA |
| Expires | 2026-09-12T23:15:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 4 SSE Plumville |
| Spc County | Indiana |
| Spc State | PA |
| Spc Comments | Trees down at Washington Church and Davis roads. (PBZ) |
| Iem TypeSummary | D |
| Iem City | 4 ESE Timblin |
| Iem County | Jefferson |
| Iem State | PA |
| Iem Wfo | PBZ |
| Iem Remark | A tree was reported down over Porter Road near the town of Porter. |
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 in this area?