Right now
The most recent data we hold from NOAA arrived 6 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
13 other detections within 20 km in the last 24 hours, the nearest 5 km from here.
This alert is in force until 22 September 2026, 06:45 UTC.
It is the 6th strongest of the 29 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 22 at 12:08AM EDT until September 22 at 2:45AM EDT by NWS Jackson KY
Nearby, since 16 March 2026
- July 20, 2026 · score 16 · 11.1 km
- July 4, 2026 · score 22 · 17.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 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 v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 16 / 100 |
| Legacy data-support index | 0.61/1 |
| Coordinates | 36.8701, -83.3410 |
| Nearest City | Morristown (74 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-22T04:08:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.379c49d7ac397c7a56dc1ddaafa7e05d6c65a077.001.1 |
Physical priority index · v5. 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: 2026-09-22T04:08:00.000Z.
First archived: 2026-09-22T04:14:48.680Z. Material modification: 2026-09-22T04:36:24.612Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-22T04:36:24.612Z · data_change
Index 16 → 16; severity medium → medium; version 5 → 5.
2026-09-22T04:20:16.127Z · data_change
Index 16 → 16; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Harlan, KY; Buchanan, VA; Dickenson, VA; Cumberland, TN and 3 more areas |
| Headline | Flash Flood Warning issued September 22 at 12:08AM EDT until September 22 at 2:45AM EDT by NWS Jackson KY |
| Expires | 2026-09-22T02:45:00-04:00 |
| SenderName | NWS Jackson KY |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.379c49d7ac397c7a56dc1ddaafa7e05d6c65a077.001.1","noaa_urn:oid:2.49.0.1.840.0.f6cdbcaa15bcd1cd2cb51abfd068a7d9f43fd31d.001.1","noaa_urn:oid:2.49.0.1.840.0.534d89cd3da46e4eda63d65993699e3f150c567f.001.1","noaa_urn:oid:2.49.0.1.840.0.9a4220878692eac77492d6dd797aa5774de78bf3.001.1","noaa_urn:oid:2.49.0.1.840.0.14d305f2f623d525406206c39bd489c3005f628f.001.1","noaa_urn:oid:2.49.0.1.840.0.2f500f8abee474b7dd79c0bd76709e2e656a1703.001.1"] |
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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