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 19 May 2026 at 23:00 UTC. It is kept here as a record.
No stronger detection stands among the 14 recorded within 20 km of this point since 16 May 2026 — 8 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 19 at 2:52PM CDT until May 19 at 6:00PM CDT by NWS Fort Worth TX
An estimated 3,985,963 people live within 50 km of this point.
Nearby, since 16 May 2026
- June 20, 2026 · score 52 · 9.2 km
- May 23, 2026 · score 52 · 16.6 km
- June 20, 2026 · score 52 · 17.4 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 85 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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 |
| Our confidence | 85% |
| Coordinates | 33.1750, -96.8367 |
| Nearest City | Frisco (3 km) |
| Population Exposed | 4.0M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T19:52:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.d9725d4349170f4f787f65bcee3eb611a757564e.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Collin, TX; Denton, TX |
| Headline | Flash Flood Warning issued May 19 at 2:52PM CDT until May 19 at 6:00PM CDT by NWS Fort Worth TX |
| Expires | 2026-05-19T18:00:00-05:00 |
| SenderName | NWS Fort Worth TX |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 0.88 |
| Iem Unit | Inch |
| Iem City | 1 N Aubrey |
| Iem County | Denton |
| Iem State | TX |
| Iem Wfo | FWD |
| Iem Remark | Report of nickel size hail north of Aubrey by HAM radio. |
| MergedSources | [{"id":"iem_H_33.320_-96.990_1779216300000","source":"iem","severity":"low","severityValue":25,"timestamp":1779216300000,"latitude":33.32,"longitude":-96.99}] |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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.
Want to know when something happens near Frisco?
Calamity.live data shows a weather event with CalamityScore 52/100, near Frisco (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.