Right now
The most recent data we hold from NOAA arrived 4 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 23 June 2026 at 21:30 UTC. It is kept here as a record.
No stronger detection stands among the 63 recorded within 20 km of this point since 16 March 2026 — 37 others scored the same. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 23 at 5:19PM EDT until June 23 at 5:30PM EDT by NWS Jacksonville FL
Urban PEI: 1,157,579 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- March 17, 2026 · score 52 · 6.1 km
- March 16, 2026 · score 52 · 6.1 km
- September 6, 2026 · score 46 · 7.4 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 52 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) | 52 / 100 |
| Legacy data-support index | 0.84/1 |
| Coordinates | 30.1631, -81.9630 |
| Nearest City | Oakleaf Plantation (12 km) |
| Urban exposure index (PEI) | 1.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-23T21:19:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.c422a6acc8ab9abf97a9e457d885fcc1 |
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: 2026-06-23T21:19:00.000Z.
First archived: 2026-06-23T21:27:14.647Z. 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 | Duval, FL; Nassau, FL; St. Johns, FL; Alachua, FL; Baker, FL; Bradford, FL; Clay, FL; Columbia, FL; Union, FL |
| Headline | Severe Thunderstorm Warning issued June 23 at 5:19PM EDT until June 23 at 5:30PM EDT by NWS Jacksonville FL |
| Expires | 2026-06-23T17:30:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c422a6acc8ab9abf97a9e457d885fcc1bca97abf.002.1","noaa_urn:oid:2.49.0.1.840.0.c608cbc0901ab5f1069713386537162ec7fe6846.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 44 |
| Iem Unit | MPH |
| Iem City | 1 ESE Watertown |
| Iem County | Columbia |
| Iem State | FL |
| Iem Wfo | JAX |
| Iem Remark | AWOS station KLCQ Lake City measured a wind gust of 44 mph. |
| MergedSources | [{"id":"iem_G_30.180_-82.580_1782247800000","source":"iem","severity":"low","severityValue":25,"timestamp":1782247800000,"latitude":30.18,"longitude":-82.58}] |
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.
Review the area, threshold and delivery channel in your account.
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