This alert expired on 19 July 2026 at 01:00 UTC. It is kept here as a record.
It is the 8th strongest of the 238 detections recorded within 20 km of this point since 11 March 2026. Another comparable one was recorded here earlier the same day. 29 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Watch issued July 18 at 2:19PM EDT until July 18 at 9:00PM EDT by NWS Baltimore MD/Washington DC
An estimated 1,479,586 people live within 50 km of this point.
Nearby, since 11 March 2026
- August 28, 2026 · score 58 · 0.0 km
- August 27, 2026 · score 66 · 0.0 km
- May 20, 2026 · score 52 · 0.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 64 out of 100, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 64 / 100 |
| Our confidence | 80% |
| Coordinates | 39.0000, -76.2333 |
| Nearest City | Annapolis (22 km) |
| Population Exposed | 1.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-18T18:19:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Watch_noaa_urn:oid:2.49.0.1.840.0.3a74010049e37e8161f6881a8048463d |
Score Breakdown
Technical Details
| Event | Tornado Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Tidal Potomac from Key Bridge to Indian Head MD; Chester River to Queenstown MD; Eastern Bay; Carroll, MD; Frederick, MD; Howard, MD; Montgomery, MD; Prince Georges, MD; Anne Arundel, MD; Baltimore, MD; Calvert, MD; Cecil, MD; Harford, MD; Baltimore City, MD and 3 more areas |
| Headline | Tornado Watch issued July 18 at 2:19PM EDT until July 18 at 9:00PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-07-18T21:00:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | false |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3a74010049e37e8161f6881a8048463d0d6ad7df.002.2","noaa_urn:oid:2.49.0.1.840.0.3a74010049e37e8161f6881a8048463d0d6ad7df.001.2","noaa_urn:oid:2.49.0.1.840.0.3a74010049e37e8161f6881a8048463d0d6ad7df.003.1","noaa_urn:oid:2.49.0.1.840.0.3a74010049e37e8161f6881a8048463d0d6ad7df.004.1","noaa_urn:oid:2.49.0.1.840.0.d6a1c3decb24433b8a6ea8f91830e2e51e4dc554.001.1","noaa_urn:oid:2.49.0.1.840.0.d6a1c3decb24433b8a6ea8f91830e2e51e4dc554.002.1"] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
Series begins 10 February 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.
Calamity.live data shows a weather event with CalamityScore 64/100, near Annapolis (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.