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 30 May 2026 at 16:45 UTC. It is kept here as a record.
It is the 15th strongest of the 51 detections recorded within 20 km of this point since 20 May 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 30 at 8:49AM EDT until May 30 at 12:45PM EDT by NWS Morristown TN
Urban PEI: 286,915 within a heuristic 50 km radius; not unique people.
Nearby, since 20 May 2026
- May 30, 2026 · score 37 · 0.0 km
- July 17, 2026 · score 43 · 7.6 km
- May 30, 2026 · score 37 · 9.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 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) | 37 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 35.9779, -84.0864 |
| Nearest City | Farragut (12 km) |
| Urban exposure index (PEI) | 286.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-30T12:49:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.601693cb198d1efc9fae60a5041e99d5 |
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: 2026-05-30T12:49:00.000Z.
First archived: 2026-05-30T12:59:24.515Z. 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 | Morgan, TN; Anderson, TN; Morgan, TN; Greene, TN and 2 more areas |
| Headline | Flash Flood Warning issued May 30 at 8:49AM EDT until May 30 at 12:45PM EDT by NWS Morristown TN |
| Expires | 2026-05-30T12:45:00-04:00 |
| SenderName | NWS Morristown TN |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.601693cb198d1efc9fae60a5041e99d5af466f31.001.1","noaa_urn:oid:2.49.0.1.840.0.7494dd5e06cbcb8fab0627422893fbe0d1584e87.001.1","noaa_urn:oid:2.49.0.1.840.0.090357cab7eb615e66323166b9a75a7625d7e3e3.001.1","noaa_urn:oid:2.49.0.1.840.0.cbb34a70da51c954ba82ab6807b7572600050078.001.1","noaa_urn:oid:2.49.0.1.840.0.2a2b12381b761c9d48d523e1464d29b48b87c836.001.1"] |
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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