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.
This alert expired on 20 May 2026 at 06:00 UTC. It is kept here as a record.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued May 19 at 6:12PM CDT until May 20 at 1:00AM CDT by NWS Austin/San Antonio TX
Urban PEI: 389,158 within a heuristic 50 km radius; not unique people.
How we know
4 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.91/1 |
| Coordinates | 31.0000, -97.6000 |
| Nearest City | Harker Heights (11 km) |
| Urban exposure index (PEI) | 389.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T23:12:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.d737b4ae2ef4dbf3b916a59ab9e73e84 |
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: 2026-05-19T23:12:00.000Z.
First archived: 2026-05-20T01:17:42.434Z. 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 | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Bastrop, TX; Blanco, TX; Burnet, TX; Hays, TX; Lee, TX; Travis, TX; Williamson, TX; Bell, TX; Coryell, TX; Falls, TX; Lampasas, TX; Limestone, TX; McLennan, TX; Milam, TX; Robertson, TX; Brazos, TX; Burleson, TX; Washington, TX and 3 more areas |
| Headline | Severe Thunderstorm Watch issued May 19 at 6:12PM CDT until May 20 at 1:00AM CDT by NWS Austin/San Antonio TX |
| Expires | 2026-05-20T01:00:00-05:00 |
| SenderName | NWS Austin/San Antonio TX |
| HasExactCoords | false |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d737b4ae2ef4dbf3b916a59ab9e73e841a9b550f.001.1","noaa_urn:oid:2.49.0.1.840.0.c96df3b3a8d04aa68dd0ccf1632bfcc4eddf2114.001.1","noaa_urn:oid:2.49.0.1.840.0.484202cd8e3dff5e95db136db57eb5642234b8b6.001.1","noaa_urn:oid:2.49.0.1.840.0.d737b4ae2ef4dbf3b916a59ab9e73e841a9b550f.002.1","noaa_urn:oid:2.49.0.1.840.0.99f260ed2093aaeb87161ec2c21a3ef7082228cc.001.1","noaa_urn:oid:2.49.0.1.840.0.4dcdda8e199b018d40fa1a7a009ff875faaf7a47.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | Granger |
| Iem County | Williamson |
| Iem State | TX |
| Iem Wfo | EWX |
| Iem Remark | Media relayed TV viewers observing quarter sized hail in Granger. |
| MergedSources | [{"id":"iem_H_31.430_-97.680_1779234420000","source":"iem","severity":"low","severityValue":25,"timestamp":1779234420000,"latitude":31.43,"longitude":-97.68},{"id":"iem_H_30.760_-97.500_1779234780000","source":"iem","severity":"low","severityValue":25,"timestamp":1779234780000,"latitude":30.76,"longitude":-97.5},{"id":"iem_H_30.720_-97.440_1779233760000","source":"iem","severity":"low","severityValue":25,"timestamp":1779233760000,"latitude":30.72,"longitude":-97.44}] |
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 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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