This alert expired on 28 May 2026 at 18:31 UTC. It is kept here as a record.
It is the 2nd strongest of the 37 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 14 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 28 at 2:21PM EDT until May 28 at 2:30PM EDT by NWS Morristown TN
An estimated 61,062 people live within 50 km of this point.
Nearby, since 16 March 2026
- May 28, 2026 · score 39 · 5.0 km
- August 13, 2026 · score 39 · 12.7 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 91 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 39 / 100 |
| Our confidence | 91% |
| Coordinates | 36.0393, -83.0501 |
| Nearest City | Greeneville (24 km) |
| Population Exposed | 61.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-28T18:21:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.8ba884eb079b56eca0a0adbe5af59647 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Cocke, TN; Cocke, TN; Greene, TN |
| Headline | Flash Flood Warning issued May 28 at 2:21PM EDT until May 28 at 2:30PM EDT by NWS Morristown TN |
| Expires | 2026-05-28T14:31:00-04:00 |
| SenderName | NWS Morristown TN |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8ba884eb079b56eca0a0adbe5af596470cfa5820.001.1","noaa_urn:oid:2.49.0.1.840.0.6c1dbc4b91d2445f5a89ec958f483a7ee5f1b236.001.1"] |
| Iem TypeSummary | F |
| Iem City | Parrottsville |
| Iem County | Cocke |
| Iem State | TN |
| Iem Wfo | MRX |
| Iem Remark | Business inundated with water. |
| MergedSources | [{"id":"iem_F_36.050_-83.180_1779975000000","source":"iem","severity":"low","severityValue":25,"timestamp":1779975000000,"latitude":36.05,"longitude":-83.18},{"id":"iem_F_36.010_-83.100_1779971400000","source":"iem","severity":"low","severityValue":25,"timestamp":1779971400000,"latitude":36.01,"longitude":-83.1}] |
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.
Want to know when something happens near Greeneville?
Calamity.live data shows a weather event with CalamityScore 39/100, near Greeneville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.