MediumSevere WeatherCS: 32 · v4 (historical)

Severe Weather near Johnstown

SomersetUnited StatesSPC

Right now

The most recent data we hold from SPC arrived 52 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.

Reported by SPC 22 days ago.

No stronger detection stands among the 171 recorded within 20 km of this point since 11 March 2026 — 44 others scored the same. Another comparable one was recorded here earlier the same day.

What the source measured

SPC reported: Wind UNK kt near 1 ESE Windber, Somerset, PA. Tree down blocking Jay street. (CTP)

Urban PEI: 65,310 within a heuristic 50 km radius; not unique people.

Nearby, since 11 March 2026

How we know

2 recorded sources include SPC; independence is not established by this count.

Our own score for this event is 32 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 v4. Rows carrying other versions were judged by different rules and are not directly comparable.

Event Data

TypeSevere Weather
SeverityMedium
Calamity Score (ours)32 / 100
Legacy data-support index0.90/1
Coordinates40.2200, -78.8000
Nearest CityJohnstown (16 km)
Urban exposure index (PEI)65.3K within 50 km
Impact Tiersignificant
Timestamp2026-09-04T00:45:29.261Z
Sourcehttps://www.spc.noaa.gov/climo/reports/today.html

Physical priority index · v4 (historical). 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: spc. Occurrence: 2026-09-04T00:45:29.261Z.

First archived: 2026-09-04T00:42:18.066Z. 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

35
intensity
55
Urban PEI term
0
Scenario weight
18
Recorded reference / batch anomaly

Technical Details

ReportTypewind
SpeedUNK
Location1 ESE Windber
CountySomerset
StatePA
CommentsTree down blocking Jay street. (CTP)
Iem TypeSummaryD
Iem City1 ESE Windber
Iem CountySomerset
Iem StatePA
Iem WfoCTP
Iem RemarkTree down blocking Jay street.
MergedSources[{"id":"iem_D_40.220_-78.800_1788478320000","source":"iem","severity":"low","severityValue":25,"timestamp":1788478320000,"latitude":40.22,"longitude":-78.8}]

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.

Follow this area

Review the area, threshold and delivery channel in your account.

Want to know when something happens near Johnstown?

Share:XLinkedIn