Right now
The most recent data we hold from NOAA arrived 22 minutes 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 16 March 2026 at 19:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 69 detections recorded within 20 km of this point since 16 March 2026. 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 March 16 at 2:47PM EDT until March 16 at 3:45PM EDT by NWS Jacksonville FL
Urban PEI: 127,431 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- May 30, 2026 · score 37 · 9.7 km
- June 27, 2026 · score 39 · 10.3 km
- September 6, 2026 · 11.0 km
How we know
15 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.88/1 |
| Coordinates | 29.7183, -81.7258 |
| Nearest City | Fleming Island (41 km) |
| Urban exposure index (PEI) | 127.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-16T18:47:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.2aef5767d5ab82e4b7cee31110cab60a |
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: 2026-03-16T18:47:00.000Z.
First archived: 2026-03-16T19:00:32.169Z. 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 | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Alachua, FL; Bradford, FL; Clay, FL; Putnam, FL; St. Johns, FL; Clay, FL; Duval, FL; Nassau, FL; St. Johns, FL; Alachua, FL; Marion, FL; Putnam, FL and 1 more areas |
| Headline | Severe Thunderstorm Warning issued March 16 at 2:47PM EDT until March 16 at 3:45PM EDT by NWS Jacksonville FL |
| Expires | 2026-03-16T15:45:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2aef5767d5ab82e4b7cee31110cab60adec0a7bd.001.1","noaa_urn:oid:2.49.0.1.840.0.c6822990af1851c39c7b7a3f221fafa49c6f3d15.001.1","noaa_urn:oid:2.49.0.1.840.0.66b8d5652d5cad01c8e2ee0ce55dcfd867b6324f.001.1","noaa_urn:oid:2.49.0.1.840.0.1d6991483a68bda6d8f7750e9f3501b2bf12a5b4.001.1"] |
| 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 | 55 |
| Iem Unit | MPH |
| Iem City | 5 NNW Keystone Heights |
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 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.
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