Right now
The most recent data we hold from NOAA arrived 6 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 8 August 2026 at 00:30 UTC. It is kept here as a record.
No stronger detection stands among the 123 recorded within 20 km of this point since 17 March 2026 — 53 others scored the same. Another comparable one was recorded here earlier the same day. 33 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 7 at 5:22PM EDT until August 7 at 8:30PM EDT by NWS Baltimore MD/Washington DC
Urban PEI: 400,352 within a heuristic 50 km radius; not unique people.
Nearby, since 17 March 2026
- July 21, 2026 · score 37 · 5.6 km
- August 7, 2026 · score 43 · 5.9 km
- July 28, 2026 · score 43 · 7.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
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 | 0.80/1 |
| Coordinates | 40.6732, -75.6077 |
| Nearest City | Whitehall Township (9 km) |
| Urban exposure index (PEI) | 400.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-07T21:22:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.4651051274684ef31c5d062a5ab6426f |
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: 2026-08-07T21:22:00.000Z.
First archived: 2026-08-07T21:35:06.897Z. 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 | Baltimore, MD; Baltimore City, MD; Lancaster, PA; York, PA; York, PA and 11 more areas |
| Headline | Flash Flood Warning issued August 7 at 5:22PM EDT until August 7 at 8:30PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-08-07T20:30:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 15 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4651051274684ef31c5d062a5ab6426f3d3e6aa9.001.1","noaa_urn:oid:2.49.0.1.840.0.cd4729a020497949f5ffc5867c8b05b5e65d739f.001.1","noaa_urn:oid:2.49.0.1.840.0.1bd10011d775e347902837e55ddec8e8f1316b1c.001.1","noaa_urn:oid:2.49.0.1.840.0.00f1876b158b2605b030e9efc78f7513996266cf.001.1","noaa_urn:oid:2.49.0.1.840.0.f0b64bbe5a54a06e03ba5a737252cc54ea98d843.001.1","noaa_urn:oid:2.49.0.1.840.0.28f453b6309252a87793871920ff45dc8f8d5ef2.001.1","noaa_urn:oid:2.49.0.1.840.0.b7ef4630c43c4f594afa66b4313e65f64bfee346.001.1","noaa_urn:oid:2.49.0.1.840.0.9c02e968c55899766f8177b714a9b0833d905a56.001.1","noaa_urn:oid:2.49.0.1.840.0.14606ea67c24dcae066495777594bd03967e419a.001.1","noaa_urn:oid:2.49.0.1.840.0.1f36db1536d558d3351bf1af21a03afbd875166a.001.1","noaa_urn:oid:2.49.0.1.840.0.dbe568fc25495e75ebf882dfbf9df0dc780ff14a.001.1","noaa_urn:oid:2.49.0.1.840.0.b97f580d0f5224ef46f21edae3fbd213b813bac8.001.1","noaa_urn:oid:2.49.0.1.840.0.3ce0b9b0a354d5b6b12bbbb8998914ea0ede9056.001.1","noaa_urn:oid:2.49.0.1.840.0.e2778e540dd3c1cfc05055bddcc942c8a7809363.001.1","noaa_urn:oid:2.49.0.1.840.0.50ff540a356604d30fec75a9e0adac529074040a.002.1"] |
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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