This alert expired on 4 July 2026 at 21:30 UTC. It is kept here as a record.
No stronger detection stands among the 39 recorded within 20 km of this point since 16 March 2026 — 20 others scored the same. 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: Severe Thunderstorm Warning issued July 4 at 3:45PM CDT until July 4 at 4:30PM CDT by NWS Memphis TN
An estimated 1,672,124 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 1, 2026 · score 52 · 8.9 km
- March 16, 2026 · score 52 · 17.5 km
- June 13, 2026 · score 46 · 18.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 77 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 77% |
| Coordinates | 34.9280, -89.7540 |
| Nearest City | Olive Branch (8 km) |
| Population Exposed | 1.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T20:45:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2c3f8815d95d7fcd13608c1c33d7557c78d434c9.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | DeSoto, MS; Marshall, MS; Shelby, TN |
| Headline | Severe Thunderstorm Warning issued July 4 at 3:45PM CDT until July 4 at 4:30PM CDT by NWS Memphis TN |
| Expires | 2026-07-04T16:30:00-05:00 |
| SenderName | NWS Memphis TN |
| HasExactCoords | true |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 10 February 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.
Calamity.live data shows a weather event with CalamityScore 52/100, near Olive Branch (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.