This alert expired on 16 March 2026 at 19:15 UTC. It is kept here as a record.
It is the 5th strongest of the 65 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued March 16 at 3:00PM EDT until March 16 at 3:15PM EDT by NWS Jacksonville FL
An estimated 292,960 people live within 50 km of this point.
Nearby, since 16 March 2026
- March 17, 2026 · score 43 · 10.5 km
- July 30, 2026 · score 43 · 12.8 km
- June 28, 2026 · score 43 · 13.4 km
How we know
Confirmed by 17 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 88 % 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) | 43 / 100 |
| Our confidence | 88% |
| Coordinates | 29.8217, -81.8541 |
| Nearest City | Fleming Island (33 km) |
| Population Exposed | 293.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-16T19:00:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.d7767cea16def77fbccfff0f8bb77fd3 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Duval, FL; Nassau, FL; St. Johns, FL; Alachua, FL; Bradford, FL; Clay, FL; Putnam, FL; St. Johns, FL; Alachua, FL; Marion, FL; Putnam, FL |
| Headline | Severe Thunderstorm Warning issued March 16 at 3:00PM EDT until March 16 at 3:15PM EDT by NWS Jacksonville FL |
| Expires | 2026-03-16T15:15:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d7767cea16def77fbccfff0f8bb77fd3e2d1ac6c.002.1","noaa_urn:oid:2.49.0.1.840.0.2aef5767d5ab82e4b7cee31110cab60adec0a7bd.001.1","noaa_urn:oid:2.49.0.1.840.0.66b8d5652d5cad01c8e2ee0ce55dcfd867b6324f.001.1"] |
| Spc ReportType | wind |
| Spc Speed | 61 |
| Spc Location | 1 NW Gainesville Airpor |
| Spc County | Alachua |
| Spc State | FL |
| Spc Comments | ASOS station KGNV Gainesville measured a peak gust of 61 mph. (JAX) |
| Iem TypeSummary | G |
| Iem Magnitude | 44 |
| Iem Unit | MPH |
| Iem City | Mayport |
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.
Want to know when something happens near Fleming Island?
Calamity.live data shows a weather event with CalamityScore 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.