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 5 July 2026 at 23:30 UTC. It is kept here as a record.
It is the 12th strongest of the 53 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 5 at 5:22PM EDT until July 5 at 7:30PM EDT by NWS Baltimore MD/Washington DC
Urban PEI: 19,966 within a heuristic 50 km radius; not unique people.
Nearby, since 12 March 2026
- June 25, 2026 · score 28 · 14.0 km
- March 12, 2026 · score 45 · 14.8 km
- July 10, 2026 · score 39 · 15.8 km
How we know
9 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 34 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) | 34 / 100 |
| Legacy data-support index | 0.87/1 |
| Coordinates | 40.7197, -79.0811 |
| Nearest City | Johnstown (45 km) |
| Urban exposure index (PEI) | 20.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-05T21:22:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.66b86ab65aebd4a93d77d52544415265 |
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: 2026-07-05T21:22:00.000Z.
First archived: 2026-07-05T21:31:24.819Z. 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 | Allegany, MD; Carroll, OH; Columbiana, OH; Jefferson, OH; Beaver, PA; Hancock, WV; Allegheny, PA; Beaver, PA; Butler, PA; Washington, PA; Westmoreland, PA; Hancock, WV and 6 more areas |
| Headline | Flash Flood Warning issued July 5 at 5:22PM EDT until July 5 at 7:30PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-07-05T19:30:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.66b86ab65aebd4a93d77d525444152657e6d5593.001.1","noaa_urn:oid:2.49.0.1.840.0.aa5a707c6e30ad50a5d0d31b4b470c688015b527.001.1","noaa_urn:oid:2.49.0.1.840.0.7f2ec42787e12e4d06d5dd0ddaa70981a04cde97.001.1","noaa_urn:oid:2.49.0.1.840.0.3a97941b4f4ca54131d1793a873f90261ab72a81.001.1","noaa_urn:oid:2.49.0.1.840.0.3678a962345a997a3970e803599e01737ee0d612.001.1","noaa_urn:oid:2.49.0.1.840.0.ae201eef81d3f706985862940d82a70a1baa8cb7.001.1","noaa_urn:oid:2.49.0.1.840.0.27d2a7151f63d22631ce8d28cf032ef6b10f92bb.001.1","noaa_urn:oid:2.49.0.1.840.0.b5e177b97daf5f94159169c09c4a239a5b11c04d.001.1","noaa_urn:oid:2.49.0.1.840.0.49a8e05d2bb19ff0ec73eca000a705164a9eb2b7.001.1"] |
| Iem TypeSummary | D |
| Iem City | 4 NNW Saxonburg |
| Iem County | Butler |
| Iem State | PA |
| Iem Wfo | PBZ |
| Iem Remark | Tree down blocking half of Saxonburg Road. |
| MergedSources | [{"id":"iem_D_40.690_-79.700_1783283820000","source":"iem","severity":"low","severityValue":25,"timestamp":1783283820000,"latitude":40.69,"longitude":-79.7},{"id":"iem_D_40.780_-79.800_1783283460000","source":"iem","severity":"low","severityValue":25,"timestamp":1783283460000,"latitude":40.78,"longitude":-79.8},{"id":"iem_D_40.780_-79.740_1783284000000","source":"iem","severity":"low","severityValue":25,"timestamp":1783284000000,"latitude":40.78,"longitude":-79.74},{"id":"iem_D_40.910_-79.740_1783282080000","source":"iem","severity":"low","severityValue":25,"timestamp":1783282080000,"latitude":40.91,"longitude":-79.74},{"id":"iem_D_40.790_-79.700_1783283220000","source":"iem","severity":"low","severityValue":25,"timestamp":1783283220000,"latitude":40.79,"longitude":-79.7},{"id":"iem_D_40.760_-79.780_1783284060000","source":"iem","severity":"low","severityValue":25,"timestamp":1783284060000,"latitude":40.76,"longitude":-79.78},{"id":"iem_F_41.100_-79.680_1783283880000","source":"iem","severity":"low","severityValue":25,"timestamp":1783283880000,"latitude":41.1,"longitude":-79.68},{"id":"iem_D_40.800_-79.850_1783282980000","source":"iem","severity":"low","severityValue":25,"timestamp":1783282980000,"latitude":40.8,"longitude":-79.85}] |
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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