Right now
The most recent data we hold from NOAA arrived 2 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 6 July 2026 at 02:01 UTC. It is kept here as a record.
It is the 7th strongest of the 107 detections recorded within 20 km of this point since 11 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 5 at 9:51PM EDT until July 5 at 10:00PM EDT by NWS Baltimore MD/Washington DC
Urban PEI: 1,364,851 within a heuristic 50 km radius; not unique people.
Nearby, since 11 March 2026
- March 16, 2026 · score 52 · 4.5 km
- June 22, 2026 · score 52 · 4.5 km
- July 6, 2026 · score 52 · 6.9 km
How we know
8 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 | 0.90/1 |
| Coordinates | 39.5456, -76.2120 |
| Nearest City | Aberdeen (6 km) |
| Urban exposure index (PEI) | 1.4M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-06T01:51:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.04efabfa880f25ae1377f37e0511fd23 |
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: 2026-07-06T01:51:00.000Z.
First archived: 2026-07-06T01:54:24.446Z. 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 | Harford, MD; Clarke, VA; Fauquier, VA; Page, VA; Rappahannock, VA; Shenandoah, VA; Warren, VA; Berks, PA; Chester, PA; Montgomery, PA and 5 more areas |
| Headline | Severe Thunderstorm Warning issued July 5 at 9:51PM EDT until July 5 at 10:00PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-07-05T22:01:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.04efabfa880f25ae1377f37e0511fd236cc7235b.001.1","noaa_urn:oid:2.49.0.1.840.0.326eb621c9f02a3c1ae912cd032dea06341c2a4b.001.1","noaa_urn:oid:2.49.0.1.840.0.076bcbf47afa4f07c4b960043c063759326790f4.001.1","noaa_urn:oid:2.49.0.1.840.0.18df5334c9115c923851b3f9ff5eb130dc4cb67a.001.1","noaa_urn:oid:2.49.0.1.840.0.fa65b00ca951992702c202c0248ee4c3a598b6e7.001.1","noaa_urn:oid:2.49.0.1.840.0.84de9990e42c0705d789c8b48a6988a94b7e0b29.001.1","noaa_urn:oid:2.49.0.1.840.0.b0bebb5c76230b21203b58356a189de33838e316.001.1","noaa_urn:oid:2.49.0.1.840.0.dbecf6b27cb399e3129335784b63c546f29edead.001.1","noaa_urn:oid:2.49.0.1.840.0.4dc9a683d94d3c6ce3582e1b57058532e363867b.002.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | inch |
| Iem City | 1 WNW Finksburg |
| Iem County | Carroll |
| Iem State | MD |
| Iem Wfo | LWX |
| MergedSources | [{"id":"iem_D_40.070_-76.610_1783297500000","source":"iem","severity":"low","severityValue":25,"timestamp":1783297500000,"latitude":40.07,"longitude":-76.61},{"id":"iem_F_40.080_-76.310_1783300200000","source":"iem","severity":"low","severityValue":25,"timestamp":1783300200000,"latitude":40.08,"longitude":-76.31},{"id":"iem_H_39.530_-76.930_1783292820000","source":"iem","severity":"low","severityValue":25,"timestamp":1783292820000,"latitude":39.53,"longitude":-76.93},{"id":"iem_F_40.030_-76.320_1783301100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783301100000,"latitude":40.03,"longitude":-76.32},{"id":"iem_F_39.970_-76.710_1783299120000","source":"iem","severity":"low","severityValue":25,"timestamp":1783299120000,"latitude":39.97,"longitude":-76.71},{"id":"iem_H_39.620_-76.860_1783294080000","source":"iem","severity":"low","severityValue":25,"timestamp":1783294080000,"latitude":39.62,"longitude":-76.86},{"id":"iem_H_39.500_-76.910_1783292400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783292400000,"latitude":39.5,"longitude":-76.91}] |
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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