This alert expired on 29 June 2026 at 00:21 UTC. It is kept here as a record.
It is the 5th strongest of the 140 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 28 June 2026. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 28 at 8:11PM EDT until June 28 at 8:15PM EDT by NWS Pittsburgh PA
An estimated 633,621 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 28, 2026 · score 48 · 0.0 km
- July 10, 2026 · score 48 · 2.0 km
- July 10, 2026 · score 48 · 2.2 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 91 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 48 / 100 |
| Our confidence | 91% |
| Coordinates | 40.3925, -79.7462 |
| Nearest City | Monroeville (5 km) |
| Population Exposed | 633.6K within 50 km |
| Impact Tier | significant |
| Date | 2026-06-29 — time not reported by the source |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.306481a97821303a0c04842cc4ceb8b9455f93a8.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Allegheny, PA; Westmoreland, PA |
| Headline | Flash Flood Warning issued June 28 at 8:11PM EDT until June 28 at 8:15PM EDT by NWS Pittsburgh PA |
| Expires | 2026-06-28T20:21:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| Iem TypeSummary | F |
| Iem City | 1 NE Churchill |
| Iem County | Allegheny |
| Iem State | PA |
| Iem Wfo | PBZ |
| Iem Remark | Water over Rodi Road. |
| MergedSources | [{"id":"iem_F_40.430_-79.800_1782683100000","source":"iem","severity":"low","severityValue":25,"timestamp":1782683100000,"latitude":40.43,"longitude":-79.8},{"id":"iem_F_40.400_-79.770_1782684000000","source":"iem","severity":"low","severityValue":25,"timestamp":1782684000000,"latitude":40.4,"longitude":-79.77},{"id":"iem_F_40.450_-79.830_1782683400000","source":"iem","severity":"low","severityValue":25,"timestamp":1782683400000,"latitude":40.45,"longitude":-79.83}] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 48/100, near Monroeville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.