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 19:00 UTC. It is kept here as a record.
It is the strongest of the 7 detections recorded within 20 km of this point since 15 April 2026. The last comparable one was on 10 May 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 19 at 1:17PM CDT until May 19 at 2:00PM CDT by NWS Fort Worth TX
An estimated 97,395 people live within 50 km of this point.
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 out of 100, at 80 % 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) | 39 / 100 |
| Our confidence | 80% |
| Coordinates | 33.7867, -96.8271 |
| Nearest City | Sherman (26 km) |
| Population Exposed | 97.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T18:17:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.44600c2ec68d6a8f0894cc24779de188994766ad.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Cooke, TX; Grayson, TX |
| Headline | Flash Flood Warning issued May 19 at 1:17PM CDT until May 19 at 2:00PM CDT by NWS Fort Worth TX |
| Expires | 2026-05-19T14:00:00-05:00 |
| SenderName | NWS Fort Worth TX |
| HasExactCoords | true |
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 Sherman?
Calamity.live data shows a weather event with CalamityScore 39/100, near Sherman (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.