This alert expired on 2 August 2026 at 22:30 UTC. It is kept here as a record.
It is the 2nd strongest of the 67 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 19 July 2026.
What the source measured
NOAA reported: Flash Flood Warning issued August 2 at 3:37PM EDT until August 2 at 6:30PM EDT by NWS Pittsburgh PA
An estimated 185,806 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 10, 2026 · score 43 · 6.6 km
- August 7, 2026 · score 43 · 7.0 km
- July 8, 2026 · score 22 · 14.9 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 90 % 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) | 43 / 100 |
| Our confidence | 90% |
| Coordinates | 40.8315, -79.6346 |
| Nearest City | Plum (38 km) |
| Population Exposed | 185.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-02T19:37:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.91398bb682758247c8e5e19e9e1eed34 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Armstrong, PA; Clarion, PA; Allegheny, PA; Butler, PA |
| Headline | Flash Flood Warning issued August 2 at 3:37PM EDT until August 2 at 6:30PM EDT by NWS Pittsburgh PA |
| Expires | 2026-08-02T18:30:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.91398bb682758247c8e5e19e9e1eed34e0bdc0ce.001.1","noaa_urn:oid:2.49.0.1.840.0.c5b42edf7e7dca71ee07c402daeb14ef2e857a63.001.1"] |
| Iem TypeSummary | F |
| Iem City | 1 NE Bridgewater |
| Iem County | Beaver |
| Iem State | PA |
| Iem Wfo | PBZ |
| Iem Remark | 700 Block of Virginia Avenue closed in Rochester due to flooding. |
| MergedSources | [{"id":"iem_F_40.590_-80.230_1785694440000","source":"iem","severity":"low","severityValue":25,"timestamp":1785694440000,"latitude":40.59,"longitude":-80.23},{"id":"iem_F_40.860_-79.900_1785699000000","source":"iem","severity":"low","severityValue":25,"timestamp":1785699000000,"latitude":40.86,"longitude":-79.9},{"id":"iem_F_40.720_-80.290_1785695340000","source":"iem","severity":"low","severityValue":25,"timestamp":1785695340000,"latitude":40.72,"longitude":-80.29}] |
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 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.