This alert expired on 15 March 2026 at 22:30 UTC. It is kept here as a record.
No stronger detection stands among the 248 recorded within 20 km of this point since 15 March 2026 — 3 others scored the same.
What the source measured
NOAA reported: Tornado Warning issued March 15 at 4:51PM CDT until March 15 at 5:30PM CDT by NWS Shreveport LA
An estimated 106,107 people live within 50 km of this point.
Nearby, since 15 March 2026
- March 15, 2026 · score 67 · 5.5 km
- March 16, 2026 · score 49 · 12.8 km
- June 2, 2026 · score 43 · 19.5 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 67 out of 100, at 88 % 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 | Critical |
| Calamity Score (ours) | 67 / 100 |
| Our confidence | 88% |
| Coordinates | 32.4564, -94.6591 |
| Nearest City | Longview (9 km) |
| Population Exposed | 106.1K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-03-15T21:51:00.000Z |
| Source | https://api.weather.gov/alerts/urn-oid-2_49_0_1_840_0_7c67b0e4de1eb53d6e582ac1f77cf10bd7525e7a_001_1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Gregg, TX; Harrison, TX; Upshur, TX |
| Headline | Tornado Warning issued March 15 at 4:51PM CDT until March 15 at 5:30PM CDT by NWS Shreveport LA |
| Expires | 2026-03-15T17:30:00-05:00 |
| SenderName | NWS Shreveport LA |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1.25 |
| Iem Unit | Inch |
| Iem City | 3 SSE Lindale |
| Iem County | Smith |
| Iem State | TX |
| Iem Wfo | SHV |
| Iem Remark | Half dollar size hail fell along I-20 near Lindale. |
| MergedSources | [{"id":"iem_H_32.510_-95.440_1773609060000","source":"iem","severity":"low","severityValue":25,"timestamp":1773609060000,"latitude":32.51,"longitude":-95.44},{"id":"iem_H_32.470_-95.390_1773609840000","source":"iem","severity":"low","severityValue":25,"timestamp":1773609840000,"latitude":32.47,"longitude":-95.39}] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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 Longview?
Calamity.live data shows a weather event with CalamityScore 67/100, near Longview (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.