Right now
The most recent data we hold from NOAA arrived 1 minute 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 3 August 2026 at 03:15 UTC. It is kept here as a record.
It is the 12th strongest of the 68 detections recorded within 20 km of this point since 3 July 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 2 at 8:45PM EDT until August 2 at 11:15PM EDT by NWS State College PA
Urban PEI: 26,973 within a heuristic 50 km radius; not unique people.
Nearby, since 3 July 2026
- August 3, 2026 · score 39 · 16.1 km
- July 3, 2026 · score 39 · 17.9 km
- September 1, 2026 · score 46 · 18.9 km
How we know
7 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 | 0.91/1 |
| Coordinates | 41.6047, -76.3589 |
| Nearest City | Back Mountain (42 km) |
| Urban exposure index (PEI) | 27.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-03T00:45:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.7cdf7db5c0fd308810f096e564f6f0fc |
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: 2026-08-03T00:45:00.000Z.
First archived: 2026-08-03T01:22:17.656Z. 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 | Sullivan, PA; Bradford, PA; Broome, NY; Chenango, NY; Tioga, NY; Susquehanna, PA and 1 more areas |
| Headline | Flash Flood Warning issued August 2 at 8:45PM EDT until August 2 at 11:15PM EDT by NWS State College PA |
| Expires | 2026-08-02T23:15:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7cdf7db5c0fd308810f096e564f6f0fc09a41250.001.1","noaa_urn:oid:2.49.0.1.840.0.84dacf34afe18d884775d8dec50d9c74dcf3c5ff.001.1","noaa_urn:oid:2.49.0.1.840.0.931f998eabfab75035af9ec86ac170fc08cebdbd.001.1","noaa_urn:oid:2.49.0.1.840.0.b3dc02fb4c34a38e348855df89f50ade077f3cff.001.1"] |
| Iem TypeSummary | F |
| Iem City | 1 ENE Dushore |
| Iem County | Sullivan |
| Iem State | PA |
| Iem Wfo | CTP |
| Iem Remark | Roadway flooded on Route 87 in Sullivan County. |
| MergedSources | [{"id":"iem_F_41.610_-76.450_1785718020000","source":"iem","severity":"low","severityValue":25,"timestamp":1785718020000,"latitude":41.61,"longitude":-76.45},{"id":"iem_F_41.510_-76.550_1785719040000","source":"iem","severity":"low","severityValue":25,"timestamp":1785719040000,"latitude":41.51,"longitude":-76.55},{"id":"iem_F_41.410_-76.580_1785717780000","source":"iem","severity":"low","severityValue":25,"timestamp":1785717780000,"latitude":41.41,"longitude":-76.58},{"id":"iem_F_41.540_-76.360_1785719160000","source":"iem","severity":"low","severityValue":25,"timestamp":1785719160000,"latitude":41.54,"longitude":-76.36},{"id":"iem_R_41.590_-76.350_1785719520000","source":"iem","severity":"low","severityValue":25,"timestamp":1785719520000,"latitude":41.59,"longitude":-76.35},{"id":"iem_F_41.530_-76.380_1785717900000","source":"iem","severity":"low","severityValue":25,"timestamp":1785717900000,"latitude":41.53,"longitude":-76.38}] |
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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