This alert expired on 12 March 2026 at 00:15 UTC. It is kept here as a record.
It is the 11th strongest of the 205 detections recorded within 20 km of this point since 11 March 2026.
What the source measured
NOAA reported: Tornado Watch issued March 11 at 7:05PM EDT until March 11 at 8:00PM EDT by NWS Baltimore MD/Washington DC
An estimated 4,615,467 people live within 50 km of this point.
Nearby, since 11 March 2026
- August 10, 2026 · score 52 · 0.0 km
- July 22, 2026 · score 52 · 0.0 km
- July 4, 2026 · score 52 · 0.0 km
How we know
Confirmed by 8 independent sources, including NOAA.
Our own score for this event is 64 out of 100, at 87 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | high |
| Calamity Score (ours) | 64 / 100 |
| Our confidence | 87% |
| Coordinates | 39.0000, -76.6000 |
| Nearest City | Parole (6 km) |
| Population Exposed | 4.6M within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-03-11T23:05:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado-Watch_noaa_urn-oid-2_49_0_1_840_0_11b315a7124e7c94a4859caf236bdaa1 |
Score Breakdown
Technical Details
| Event | Tornado Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Chesapeake Bay north of Pooles Island MD; Allegany, MD; Baltimore, MD; Carroll, MD; Frederick, MD; Garrett, MD; Harford, MD; Howard, MD; Montgomery, MD; Washington, MD; Baltimore City, MD; Clarke, VA; Frederick, VA; Loudoun, VA; Shenandoah, VA; Warren, VA; City of Winchester, VA; Berkeley, WV; Grant, WV; Hampshire, WV; Hardy, WV; Jefferson, WV; Mineral, WV; Morgan, WV |
| Headline | Tornado Watch issued March 11 at 7:05PM EDT until March 11 at 8:00PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-03-11T20:15:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | false |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.11b315a7124e7c94a4859caf236bdaa15f27a176.003.1","noaa_urn:oid:2.49.0.1.840.0.11b315a7124e7c94a4859caf236bdaa15f27a176.004.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 2 WNW West Friendship |
| Spc County | Howard |
| Spc State | MD |
| Spc Comments | Trees down on MD-144 Frederick Road near Pfefferkorn Road. (LWX) |
| MergedSources | [{"id":"spc_wind_39.27_-77.31_94","source":"spc","severity":"medium","severityValue":45,"timestamp":1773269280000,"latitude":39.27,"longitude":-77.31},{"id":"spc_wind_39.24_-77.28_96","source":"spc","severity":"medium","severityValue":45,"timestamp":1773269400000,"latitude":39.24,"longitude":-77.28},{"id":"spc_wind_39.26_-77.23_97","source":"spc","severity":"medium","severityValue":45,"timestamp":1773269520000,"latitude":39.26,"longitude":-77.23},{"id":"spc_wind_39.26_-77.17_98","source":"spc","severity":"medium","severityValue":45,"timestamp":1773269640000,"latitude":39.26,"longitude":-77.17},{"id":"spc_wind_39.28_-77.13_100","source":"spc","severity":"medium","severityValue":45,"timestamp":1773269820000,"latitude":39.28,"longitude":-77.13},{"id":"spc_wind_39.32_-77.02_101","source":"spc","severity":"medium","severityValue":45,"timestamp":1773270300000,"latitude":39.32,"longitude":-77.02},{"id":"spc_wind_39.31_-76.98_102","source":"spc","severity":"medium","severityValue":45,"timestamp":1773270360000,"latitude":39.31,"longitude":-76.98}] |
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 Parole (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.