This alert expired on 15 March 2026 at 22:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 21 detections recorded within 20 km of this point since 15 March 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued March 15 at 5:35PM EDT until March 15 at 6:15PM EDT by NWS Melbourne FL
An estimated 1,211,923 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 25, 2026 · score 48 · 9.1 km
- June 2, 2026 · score 52 · 10.8 km
- July 26, 2026 · score 48 · 12.9 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 52 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) | 52 / 100 |
| Our confidence | 88% |
| Coordinates | 28.8519, -81.0629 |
| Nearest City | Deltona (20 km) |
| Population Exposed | 1.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-15T21:35:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe-Thunderstorm-Warning_noaa_urn-oid-2_49_0_1_840_0_08e30f39d7fb088bbea4cdbebaf1d1a9 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Seminole, FL; Volusia, FL; Brevard, FL; Volusia, FL |
| Headline | Severe Thunderstorm Warning issued March 15 at 5:35PM EDT until March 15 at 6:15PM EDT by NWS Melbourne FL |
| Expires | 2026-03-15T18:15:00-04:00 |
| SenderName | NWS Melbourne FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.08e30f39d7fb088bbea4cdbebaf1d1a90645e0a3.001.1","noaa_urn:oid:2.49.0.1.840.0.e311db135376f91e68075d8751166d9ebd70428e.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 53 |
| Iem Unit | MPH |
| Iem City | 1 SW Orlando Internatio |
| Iem County | Orange |
| Iem State | FL |
| Iem Wfo | MLB |
| Iem Remark | Orlando International Airport measured a peak wind gust of 53MPH/46KT from the southwest at 5:04 PM. |
| MergedSources | [{"id":"iem_G_28.290_-81.410_1773608400000","source":"iem","severity":"low","severityValue":25,"timestamp":1773608400000,"latitude":28.29,"longitude":-81.41},{"id":"iem_G_28.420_-81.330_1773608640000","source":"iem","severity":"low","severityValue":25,"timestamp":1773608640000,"latitude":28.42,"longitude":-81.33}] |
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.
Calamity.live data shows a weather event with CalamityScore 52/100, near Deltona (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.