Right now
The most recent data we hold from NOAA arrived 1 minute 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 6 July 2026 at 00:15 UTC. It is kept here as a record.
It is the 15th strongest of the 297 detections recorded within 20 km of this point since 11 March 2026. The last comparable one was on 5 July 2026. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 5 at 8:03PM EDT until July 5 at 8:15PM EDT by NWS Baltimore MD/Washington DC
Urban PEI: 1,920,935 within a heuristic 50 km radius; not unique people.
Nearby, since 11 March 2026
- August 10, 2026 · score 52 · 0.8 km
- March 12, 2026 · score 52 · 7.1 km
- September 4, 2026 · score 46 · 7.5 km
How we know
5 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 | 0.89/1 |
| Coordinates | 39.2752, -77.3923 |
| Nearest City | Ballenger Creek (11 km) |
| Urban exposure index (PEI) | 1.9M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-06T00:03:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.d2582143f5688da6ec648555516e215c |
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: 2026-07-06T00:03:00.000Z.
First archived: 2026-07-06T00:07:26.199Z. 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 Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Montgomery, MD; Albemarle, VA; Augusta, VA; Greene, VA; Madison, VA; Page, VA; Rockingham, VA; City of Harrisonburg, VA; City of Staunton, VA; Adams, PA; Cumberland, PA; Dauphin, PA; Lancaster, PA; Lebanon, PA; York, PA and 3 more areas |
| Headline | Severe Thunderstorm Warning issued July 5 at 8:03PM EDT until July 5 at 8:15PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-07-05T20:15:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d2582143f5688da6ec648555516e215c51dc8f47.002.1","noaa_urn:oid:2.49.0.1.840.0.754d1ea78a0fa4ef3541f9e714d45ffb41c3ac72.001.1","noaa_urn:oid:2.49.0.1.840.0.8dfe63927d1de871be32018cf6b6da0d88c9ba26.002.1","noaa_urn:oid:2.49.0.1.840.0.230d649122259ded5d3eec16907016fbddfb7fe5.001.1","noaa_urn:oid:2.49.0.1.840.0.7f6a4a6d7ebfb47c9dd824541367ecc325779914.001.1","noaa_urn:oid:2.49.0.1.840.0.dd441049e64b50b9923b4d9995848e9570e9d03d.001.1"] |
| Iem TypeSummary | D |
| Iem City | 3 S Roxbury Mills |
| Iem County | Montgomery |
| Iem State | MD |
| Iem Wfo | LWX |
| Iem Remark | Numerous trees down at the intersection of Damascus Rd. and Georgia Ave. |
| MergedSources | [{"id":"iem_D_39.160_-77.050_1783291380000","source":"iem","severity":"low","severityValue":25,"timestamp":1783291380000,"latitude":39.16,"longitude":-77.05},{"id":"iem_D_39.230_-77.120_1783290960000","source":"iem","severity":"low","severityValue":25,"timestamp":1783290960000,"latitude":39.23,"longitude":-77.12},{"id":"iem_G_39.180_-77.100_1783292760000","source":"iem","severity":"low","severityValue":25,"timestamp":1783292760000,"latitude":39.18,"longitude":-77.1},{"id":"iem_D_39.220_-77.060_1783291560000","source":"iem","severity":"low","severityValue":25,"timestamp":1783291560000,"latitude":39.22,"longitude":-77.06}] |
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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