This alert expired on 8 August 2026 at 21:15 UTC. It is kept here as a record.
No stronger detection stands among the 126 recorded within 20 km of this point since 16 March 2026 — 51 others scored the same. Another comparable one was recorded here earlier the same day. 12 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 8 at 4:40PM EDT until August 8 at 5:15PM EDT by NWS Baltimore MD/Washington DC
An estimated 2,767,614 people live within 50 km of this point.
Nearby, since 16 March 2026
- March 16, 2026 · score 52 · 7.3 km
- March 16, 2026 · score 52 · 9.6 km
- August 10, 2026 · score 52 · 11.3 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 85 % 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) | 52 / 100 |
| Our confidence | 85% |
| Coordinates | 38.5910, -77.4130 |
| Nearest City | Montclair (7 km) |
| Population Exposed | 2.8M within 50 km |
| Impact Tier | significant |
| Date | 2026-08-08 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.024a5a762820fe36b47b82b393e8e9ad |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Loudoun, VA; Jefferson, WV; Culpeper, VA; Spotsylvania, VA; Stafford, VA; City of Fredericksburg, VA; Stafford, VA and 1 more areas |
| Headline | Severe Thunderstorm Warning issued August 8 at 4:40PM EDT until August 8 at 5:15PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-08-08T17:15:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.024a5a762820fe36b47b82b393e8e9adaa802823.002.1","noaa_urn:oid:2.49.0.1.840.0.e5da4007e5533c7deef785be6b21b0047a54414e.002.1","noaa_urn:oid:2.49.0.1.840.0.cf14f8c1b281f817c8ce806e1ad5f163a84cb57e.001.1","noaa_urn:oid:2.49.0.1.840.0.b0002f982be8fc68f3f51a8ac6b12bb9fa9fbf33.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 58 |
| Iem Unit | mph |
| Iem City | 1 WSW Alanthus |
| Iem County | Culpeper |
| Iem State | VA |
| Iem Wfo | LWX |
| MergedSources | [{"id":"iem_G_38.540_-77.940_1786218240000","source":"iem","severity":"low","severityValue":25,"timestamp":1786218240000,"latitude":38.54,"longitude":-77.94}] |
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 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 52/100, near Montclair (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.