This alert expired on 10 August 2026 at 19:15 UTC. It is kept here as a record.
It is the 20th strongest of the 53 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 10 at 3:02PM EDT until August 10 at 3:15PM EDT by NWS Baltimore MD/Washington DC
An estimated 60,054 people live within 50 km of this point.
Nearby, since 12 March 2026
- March 12, 2026 · score 43 · 12.8 km
- March 17, 2026 · score 43 · 16.3 km
- March 16, 2026 · score 43 · 16.3 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 39 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) | 39 / 100 |
| Our confidence | 85% |
| Coordinates | 39.1708, -78.2235 |
| Nearest City | Winchester (6 km) |
| Population Exposed | 60.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-10T19:02:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.4156a98971431d50187779d35333fd87 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Frederick, MD; Washington, MD; Washington, MD; Berkeley, WV; Jefferson, WV; Morgan, WV; York, PA and 8 more areas |
| Headline | Severe Thunderstorm Warning issued August 10 at 3:02PM EDT until August 10 at 3:15PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-08-10T15:15:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4156a98971431d50187779d35333fd870f4c8dd1.001.1","noaa_urn:oid:2.49.0.1.840.0.0a69753cd9289e2b1ae4d88026e078e88fc2ddf7.001.1","noaa_urn:oid:2.49.0.1.840.0.1d2eb39f643ca3db685d0a84bc6d6ea23cf92b37.001.1","noaa_urn:oid:2.49.0.1.840.0.51fb068cefeec30b2be43f82f13c364584c6f450.001.1","noaa_urn:oid:2.49.0.1.840.0.8fc1daa53f18a3338b2279ec199c8cf7d6d10102.002.1","noaa_urn:oid:2.49.0.1.840.0.0a5135821087ecad1f25c4d527ccfe3c3f2d2924.001.1","noaa_urn:oid:2.49.0.1.840.0.123b56f0a85636104081913cb463fb4a7ded2d85.001.1","noaa_urn:oid:2.49.0.1.840.0.c31778c5676279c3ed8387374756d8147003fb07.001.1","noaa_urn:oid:2.49.0.1.840.0.8672186106917b8bd84f8ea4a05a39e587a18e56.001.1","noaa_urn:oid:2.49.0.1.840.0.b5ee1c370f608d24785d866e49e087f3e975bf1a.001.1","noaa_urn:oid:2.49.0.1.840.0.76ba900fcb1130f0d6946b14906fdaaaa5c1f25c.001.1"] |
| Iem TypeSummary | D |
| Iem City | New Creek |
| Iem County | Mineral |
| Iem State | WV |
| Iem Wfo | LWX |
| Iem Remark | Tree down in New Creek. |
| MergedSources | [{"id":"iem_D_39.380_-79.030_1786385220000","source":"iem","severity":"low","severityValue":25,"timestamp":1786385220000,"latitude":39.38,"longitude":-79.03}] |
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.
Want to know when something happens near Winchester?
Calamity.live data shows a weather event with CalamityScore 39/100, near Winchester (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.