Right now
The most recent data we hold from NOAA arrived 8 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 05:00 UTC. It is kept here as a record.
It is the 66th strongest of the 265 detections recorded within 20 km of this point since 11 March 2026. Another comparable one was recorded here earlier the same day. 20 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued July 5 at 10:09PM EDT until July 6 at 1:00AM EDT by NWS Baltimore MD/Washington DC
Urban PEI: 364,634 within a heuristic 50 km radius; not unique people.
Nearby, since 11 March 2026
- September 1, 2026 · score 37 · 0.0 km
- August 27, 2026 · score 43 · 0.0 km
- August 10, 2026 · score 43 · 0.0 km
How we know
10 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 | 0.90/1 |
| Coordinates | 39.0000, -76.0500 |
| Nearest City | Easton (26 km) |
| Urban exposure index (PEI) | 364.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-06T02:09:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.834af3719f6f4a782a057c0f928de881 |
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: 2026-07-06T02:09:00.000Z.
First archived: 2026-07-06T02:48:35.222Z. 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 | Chesapeake Bay north of Pooles Island MD; Chesapeake Bay from Pooles Island to Sandy Point MD; Chesapeake Bay from Sandy Point to North Beach MD; Chesapeake Bay from North Beach to Drum Point MD; Tidal Potomac from Key Bridge to Indian Head MD; Tidal Potomac from Indian Head to Cobb Island MD; Patapsco River including Baltimore Harbor; Chester River to Queenstown MD; Eastern Bay; Choptank River to Cambridge MD and the Little Choptank River; Patuxent River to Broomes Island MD; District of Columbia, DC; Anne Arundel, MD; Baltimore, MD; Calvert, MD; Carroll, MD; Cecil, MD; Charles, MD; Frederick, MD; Harford, MD; Howard, MD; Montgomery, MD; Prince Georges, MD; Baltimore City, MD; Arlington, VA; Fairfax, VA; Fauquier, VA; Loudoun, VA; Prince William, VA; City of Alexandria, VA; City of Fairfax, VA; City of Falls Church, VA; City of Manassas, VA; City of Manassas Park, VA; Kent, DE; New Castle, DE; Sussex, DE; Caroline, MD; Kent, MD; Queen Anne's, MD; Talbot, MD; Atlantic, NJ; Burlington, NJ; Camden, NJ; Cape May, NJ; Cumberland, NJ; Gloucester, NJ; Salem, NJ; Berks, PA; Bucks, PA; Chester, PA; Delaware, PA; Lehigh, PA; Montgomery, PA; Philadelphia, PA and 1 more areas |
| Headline | Severe Thunderstorm Watch issued July 5 at 10:09PM EDT until July 6 at 1:00AM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-07-06T01:00:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | false |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.834af3719f6f4a782a057c0f928de88168b483c8.003.1","noaa_urn:oid:2.49.0.1.840.0.834af3719f6f4a782a057c0f928de88168b483c8.002.1","noaa_urn:oid:2.49.0.1.840.0.e1bbecfbbf19b79d053e340373eba638d36062ff.001.1","noaa_urn:oid:2.49.0.1.840.0.e1bbecfbbf19b79d053e340373eba638d36062ff.002.1"] |
| Iem TypeSummary | D |
| Iem City | Glen Burnie |
| Iem County | Anne Arundel |
| Iem State | MD |
| Iem Wfo | LWX |
| Iem Remark | Numerous reports of trees/wires down |
| MergedSources | [{"id":"iem_M_39.250_-76.370_1783299600000","source":"iem","severity":"low","severityValue":25,"timestamp":1783299600000,"latitude":39.25,"longitude":-76.37},{"id":"iem_D_38.950_-76.070_1783290600000","source":"iem","severity":"low","severityValue":25,"timestamp":1783290600000,"latitude":38.95,"longitude":-76.07},{"id":"iem_D_39.110_-76.550_1783297560000","source":"iem","severity":"low","severityValue":25,"timestamp":1783297560000,"latitude":39.11,"longitude":-76.55},{"id":"iem_M_39.210_-76.440_1783299240000","source":"iem","severity":"low","severityValue":25,"timestamp":1783299240000,"latitude":39.21,"longitude":-76.44},{"id":"iem_D_39.060_-76.700_1783298400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783298400000,"latitude":39.06,"longitude":-76.7},{"id":"iem_M_39.250_-76.370_1783299300000","source":"iem","severity":"low","severityValue":25,"timestamp":1783299300000,"latitude":39.25,"longitude":-76.37},{"id":"iem_D_38.980_-75.810_1783290600000","source":"iem","severity":"low","severityValue":25,"timestamp":1783290600000,"latitude":38.98,"longitude":-75.81},{"id":"iem_D_39.040_-75.970_1783292400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783292400000,"latitude":39.04,"longitude":-75.97},{"id":"iem_D_39.170_-76.600_1783297800000","source":"iem","severity":"low","severityValue":25,"timestamp":1783297800000,"latitude":39.17,"longitude":-76.6}] |
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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