Right now
The most recent data we hold from NOAA arrived 45 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 2 August 2026 at 05:00 UTC. It is kept here as a record.
It is the 5th strongest of the 178 detections recorded within 20 km of this point since 19 May 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 August 1 at 9:56PM EDT until August 2 at 1:00AM EDT by NWS Wilmington OH
Urban PEI: 746,871 within a heuristic 50 km radius; not unique people.
Nearby, since 19 May 2026
- May 27, 2026 · score 48 · 1.9 km
- September 17, 2026 · score 41 · 2.4 km
- July 5, 2026 · score 48 · 6.8 km
How we know
4 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 48 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) | 48 / 100 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 39.7655, -84.5110 |
| Nearest City | Trotwood (18 km) |
| Urban exposure index (PEI) | 746.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-02T01:56:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.a922ac3c31cbe0d2e60a4c4439e1fabe |
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: 2026-08-02T01:56:00.000Z.
First archived: 2026-08-02T02:10:39.216Z. 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 | Greene, OH; Miami, OH; Montgomery, OH; Franklin, IN; Union, IN; Wayne, IN; Butler, OH; Darke, OH; Preble, OH |
| Headline | Flash Flood Warning issued August 1 at 9:56PM EDT until August 2 at 1:00AM EDT by NWS Wilmington OH |
| Expires | 2026-08-02T01:00:00-04:00 |
| SenderName | NWS Wilmington OH |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a922ac3c31cbe0d2e60a4c4439e1fabeb6ac0c80.001.1","noaa_urn:oid:2.49.0.1.840.0.acf354873646edaa14f5cf3d3c917cb44869997f.001.1"] |
| Iem TypeSummary | D |
| Iem City | 3 NW Saint Leon |
| Iem County | Franklin |
| Iem State | IN |
| Iem Wfo | ILN |
| Iem Remark | House damage along with small barn/garage. |
| Google News RssFeed | weather |
| Google News SourceName | Cincinnati Enquirer |
| MergedSources | [{"id":"iem_D_39.320_-84.990_1785623700000","source":"iem","severity":"low","severityValue":25,"timestamp":1785623700000,"latitude":39.32,"longitude":-84.99},{"id":"gnews_weather_496009_156","source":"google_news","severity":"medium","severityValue":40,"timestamp":1785632850000,"latitude":39.13,"longitude":-84.51},{"id":"gnews_weather_496007_157","source":"google_news","severity":"medium","severityValue":40,"timestamp":1785625200000,"latitude":39.13,"longitude":-84.51}] |
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.
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