Right now
The most recent data we hold from NOAA arrived 68 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 20 May 2026 at 07:00 UTC. It is kept here as a record.
It is the 9th strongest of the 125 detections recorded within 20 km of this point since 10 March 2026. Another comparable one was recorded here earlier the same day. 39 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 19 at 9:13PM CDT until May 20 at 2:00AM CDT by NWS Austin/San Antonio TX
An estimated 464,084 people live within 50 km of this point.
Nearby, since 10 March 2026
- May 20, 2026 · score 48 · 9.2 km
- June 23, 2026 · score 43 · 9.9 km
- May 19, 2026 · score 43 · 9.9 km
How we know
Confirmed by 10 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 90 % 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) | 43 / 100 |
| Our confidence | 90% |
| Coordinates | 30.9963, -97.7042 |
| Nearest City | Harker Heights (10 km) |
| Population Exposed | 464.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-20T02:13:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.3c75440287091f4d34fd504f11804e8a |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Williamson, TX; Falls, TX; Bell, TX and 1 more areas |
| Headline | Flash Flood Warning issued May 19 at 9:13PM CDT until May 20 at 2:00AM CDT by NWS Austin/San Antonio TX |
| Expires | 2026-05-20T02:00:00-05:00 |
| SenderName | NWS Austin/San Antonio TX |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3c75440287091f4d34fd504f11804e8a6a609746.001.1","noaa_urn:oid:2.49.0.1.840.0.071cee79f245ef6333f0b4b74f44938171b329c9.001.1","noaa_urn:oid:2.49.0.1.840.0.292b4e0810f33683ca999e6e6c45103149750762.001.1","noaa_urn:oid:2.49.0.1.840.0.bc037523a971ecad6ca4ea6a247173421eb9dd63.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 70 |
| Iem Unit | MPH |
| Iem City | 2 ESE Serenada |
| Iem County | Williamson |
| Iem State | TX |
| Iem Wfo | EWX |
| Iem Remark | Amateur Radio report at SH 130 & I-35 under the SH 130 overpass near Georgetown, had street lights and several signs blown over. Raining completely horizontal, about 70MPH. |
| MergedSources | [{"id":"iem_F_30.810_-98.200_1779243180000","source":"iem","severity":"low","severityValue":25,"timestamp":1779243180000,"latitude":30.81,"longitude":-98.2},{"id":"iem_H_31.430_-97.680_1779234420000","source":"iem","severity":"low","severityValue":25,"timestamp":1779234420000,"latitude":31.43,"longitude":-97.68},{"id":"iem_F_30.910_-98.100_1779241860000","source":"iem","severity":"low","severityValue":25,"timestamp":1779241860000,"latitude":30.91,"longitude":-98.1},{"id":"iem_E_30.880_-98.150_1779239460000","source":"iem","severity":"low","severityValue":25,"timestamp":1779239460000,"latitude":30.88,"longitude":-98.15},{"id":"iem_H_30.780_-97.850_1779239940000","source":"iem","severity":"low","severityValue":25,"timestamp":1779239940000,"latitude":30.78,"longitude":-97.85},{"id":"iem_D_30.670_-97.670_1779241860000","source":"iem","severity":"low","severityValue":25,"timestamp":1779241860000,"latitude":30.67,"longitude":-97.67},{"id":"iem_F_30.790_-98.160_1779244260000","source":"iem","severity":"low","severityValue":25,"timestamp":1779244260000,"latitude":30.79,"longitude":-98.16},{"id":"iem_F_30.840_-97.790_1779244380000","source":"iem","severity":"low","severityValue":25,"timestamp":1779244380000,"latitude":30.84,"longitude":-97.79},{"id":"iem_G_30.690_-97.660_1779243120000","source":"iem","severity":"low","severityValue":25,"timestamp":1779243120000,"latitude":30.69,"longitude":-97.66}] |
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 Harker Heights?