Right now
The most recent data we hold from NOAA arrived 9 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 28 May 2026 at 00:00 UTC. It is kept here as a record.
It is the 4th strongest of the 17 detections recorded within 20 km of this point since 26 April 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued May 27 at 4:35PM CDT until May 27 at 7:00PM CDT by NWS Fort Worth TX
An estimated 916,593 people live within 50 km of this point.
Nearby, since 26 April 2026
- May 27, 2026 · score 48 · 0.0 km
- June 14, 2026 · score 52 · 13.0 km
- June 12, 2026 · score 43 · 14.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 out of 100, at 81 % 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) | 48 / 100 |
| Our confidence | 81% |
| Coordinates | 33.3270, -96.3343 |
| Nearest City | Greenville (29 km) |
| Population Exposed | 916.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-27T23:45:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.1face5a42101b2355b84366809823f3e |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Fannin, TX; Grayson, TX; Hunt, TX; Rockwall, TX |
| Headline | Flood Warning issued May 27 at 4:35PM CDT until May 27 at 7:00PM CDT by NWS Fort Worth TX |
| Expires | 2026-05-27T19:00:00-05:00 |
| SenderName | NWS Fort Worth TX |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1face5a42101b2355b84366809823f3ec4f2b2e4.001.1","noaa_urn:oid:2.49.0.1.840.0.85ceec35e59a4da5d1fc9d9a3f0eebd636bc9622.001.1"] |
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.
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