This alert expired on 23 June 2026 at 21:45 UTC. It is kept here as a record.
No stronger detection stands among the 157 recorded within 20 km of this point since 15 March 2026 — 97 others scored the same. Another comparable one was recorded here earlier the same day. 14 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 23 at 5:29PM EDT until June 23 at 5:45PM EDT by NWS Jacksonville FL
An estimated 1,236,062 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 25, 2026 · score 52 · 9.1 km
- July 25, 2026 · score 52 · 11.6 km
- June 25, 2026 · score 52 · 11.9 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 89 % 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 | 89% |
| Coordinates | 30.1814, -81.8498 |
| Nearest City | Oakleaf Plantation (2 km) |
| Population Exposed | 1.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-23T21:29:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.9410f4379f98dd3fe70f4566577d5e73 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Alachua, FL; Baker, FL; Bradford, FL; Clay, FL; Columbia, FL; Union, FL; Duval, FL; Nassau, FL |
| Headline | Severe Thunderstorm Warning issued June 23 at 5:29PM EDT until June 23 at 5:45PM EDT by NWS Jacksonville FL |
| Expires | 2026-06-23T17:45:00-04:00 |
| SenderName | NWS Jacksonville FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9410f4379f98dd3fe70f4566577d5e735f53ee5a.001.1","noaa_urn:oid:2.49.0.1.840.0.36b1efa6c24cddac74f97f3041a3cb9be130b5a5.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 46 |
| Iem Unit | MPH |
| Iem City | 2 NNW Jacksonville Heig |
| Iem County | Duval |
| Iem State | FL |
| Iem Wfo | JAX |
| Iem Remark | AWOS station at Herlong Recreational Airport measured a wind gust of 46 mph. |
| MergedSources | [{"id":"iem_G_30.320_-81.640_1782249600000","source":"iem","severity":"low","severityValue":25,"timestamp":1782249600000,"latitude":30.32,"longitude":-81.64},{"id":"iem_G_30.180_-82.580_1782247800000","source":"iem","severity":"low","severityValue":25,"timestamp":1782247800000,"latitude":30.18,"longitude":-82.58},{"id":"iem_G_30.280_-81.810_1782249300000","source":"iem","severity":"low","severityValue":25,"timestamp":1782249300000,"latitude":30.28,"longitude":-81.81}] |
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 Oakleaf Plantation?
Calamity.live data shows a weather event with CalamityScore 52/100, near Oakleaf Plantation (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.