Right now
The most recent data we hold from NOAA arrived 6 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.
This alert expired on 5 July 2026 at 21:30 UTC. It is kept here as a record.
It is the 4th strongest of the 143 detections recorded within 20 km of this point since 11 March 2026. The last comparable one was on 4 July 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 5 at 4:33PM EDT until July 5 at 5:30PM EDT by NWS State College PA
Urban PEI: 65,310 within a heuristic 50 km radius; not unique people.
Nearby, since 11 March 2026
- July 27, 2026 · score 39 · 9.3 km
- June 6, 2026 · score 39 · 15.3 km
- July 10, 2026 · score 39 · 19.9 km
How we know
5 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 39 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 v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 39 / 100 |
| Legacy data-support index | 0.88/1 |
| Coordinates | 40.3990, -78.8195 |
| Nearest City | Johnstown (11 km) |
| Urban exposure index (PEI) | 65.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-05T20:33:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.e8942d2d600f1f1b564180da704057ed |
Physical priority index · v1. 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: noaa. Occurrence: 2026-07-05T20:33:00.000Z.
First archived: 2026-07-05T20:34:42.172Z. 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
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Centre, PA; Huntingdon, PA; Mifflin, PA; Allegheny, PA; Armstrong, PA; Butler, PA; Clarion, PA; Westmoreland, PA; Allegany, MD; Mineral, WV |
| Headline | Severe Thunderstorm Warning issued July 5 at 4:33PM EDT until July 5 at 5:30PM EDT by NWS State College PA |
| Expires | 2026-07-05T17:30:00-04:00 |
| SenderName | NWS State College PA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e8942d2d600f1f1b564180da704057edd898d550.001.1","noaa_urn:oid:2.49.0.1.840.0.a0942f9754747edbaf128b5ca5d07c68ef4df79e.001.1","noaa_urn:oid:2.49.0.1.840.0.57f18cb6ac37cab21b2cdaf8899426e870ab2be6.001.1"] |
| Iem TypeSummary | F |
| Iem City | 1 ENE Tyrone |
| Iem County | Blair |
| Iem State | PA |
| Iem Wfo | CTP |
| Iem Remark | Water up to the bottom of the first floor of the paper mill and Pennsylvania Ave completely underwater. |
| MergedSources | [{"id":"iem_F_40.680_-78.240_1783279800000","source":"iem","severity":"low","severityValue":25,"timestamp":1783279800000,"latitude":40.68,"longitude":-78.24},{"id":"iem_F_40.680_-78.240_1783279980000","source":"iem","severity":"low","severityValue":25,"timestamp":1783279980000,"latitude":40.68,"longitude":-78.24},{"id":"iem_F_40.680_-78.240_1783279680000","source":"iem","severity":"low","severityValue":25,"timestamp":1783279680000,"latitude":40.68,"longitude":-78.24},{"id":"iem_F_40.680_-78.230_1783280400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783280400000,"latitude":40.68,"longitude":-78.23}] |
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens near Johnstown?