Right now
The most recent data we hold from NOAA arrived 3 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.
It is the 2nd strongest of the 40 detections recorded within 20 km of this point since 26 April 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 19 at 3:42PM CDT until May 19 at 6:00PM CDT by NWS Fort Worth TX
Urban PEI: 5,743,849 within a heuristic 50 km radius; not unique people.
Nearby, since 26 April 2026
- May 19, 2026 · score 52 · 0.0 km
- May 23, 2026 · score 52 · 2.7 km
- July 13, 2026 · score 52 · 6.6 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 52 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.84/1 |
| Coordinates | 32.9608, -97.0750 |
| Nearest City | Grapevine (3 km) |
| Urban exposure index (PEI) | 5.7M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T20:42:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.d28e08949160569ebc156596d8ab4ba8 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-05-19T20:42:00.000Z.
First archived: 2026-05-19T21:05:13.382Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Collin, TX; Denton, TX; Dallas, TX; Tarrant, TX |
| Headline | Flash Flood Warning issued May 19 at 3:42PM 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 |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d28e08949160569ebc156596d8ab4ba80e79f2d5.001.1","noaa_urn:oid:2.49.0.1.840.0.9882d633333c6bbc085e2d8c231d9b7723ecf51e.001.1"] |
| 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.
Review the area, threshold and delivery channel in your account.
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