This alert expired on 20 June 2026 at 19:45 UTC. It is kept here as a record.
It is the 5th strongest of the 57 detections recorded within 20 km of this point since 16 March 2026. 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 20 at 3:12PM EDT until June 20 at 3:45PM EDT by NWS Tallahassee FL
An estimated 220,473 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 16, 2026 · score 43 · 8.2 km
- August 12, 2026 · score 43 · 13.8 km
- July 10, 2026 · score 43 · 14.2 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 85 % 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 | 85% |
| Coordinates | 30.5357, -83.9604 |
| Nearest City | Tallahassee (32 km) |
| Population Exposed | 220.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-20T19:12:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.e8a590dc231636d49e0f6b5848f7ad5e |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Jefferson, FL; Leon, FL; Grady, GA; Thomas, GA; Jefferson, FL; Leon, FL; Madison, FL; Taylor, FL |
| Headline | Severe Thunderstorm Warning issued June 20 at 3:12PM EDT until June 20 at 3:45PM EDT by NWS Tallahassee FL |
| Expires | 2026-06-20T15:45:00-04:00 |
| SenderName | NWS Tallahassee FL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e8a590dc231636d49e0f6b5848f7ad5ea557a4fd.001.1","noaa_urn:oid:2.49.0.1.840.0.fd791a973e7c9631c447448208afcc22221fde68.002.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 40 |
| Iem Unit | MPH |
| Iem City | Tallahassee Internation |
| Iem County | Leon |
| Iem State | FL |
| Iem Wfo | TAE |
| Iem Remark | ASOS station KTLH Tallahassee International Airport. |
| MergedSources | [{"id":"iem_G_30.400_-84.350_1781979780000","source":"iem","severity":"low","severityValue":25,"timestamp":1781979780000,"latitude":30.4,"longitude":-84.35}] |
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 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.