Hail in Mill Creek · Aug 27, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Mill Creek that day. Open it on the live map to see the swath over the streets.
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Convective day · Aug 27, 2026 · noon–noon UTC
Severity
The 2nd most severe storm Mill Creek has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Peak hail signal
- 13 /100
- Homes exposed
- 0 /100
- Ground truth
- 0 /100
Largest radar-indicated size — a signal of damage potential, not confirmation.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
Evidence / storm surfaces
How Mill Creek saw the hail — from two instruments
Two instruments, one storm: NEXRAD logs the point signatures it detected overhead, while the estimated-size surface models how large the hail aloft could have grown. Agreement between them is not guaranteed — the gaps are where the model ran ahead of, or behind, the detections.
Estimated size field Radar-estimated maximum hail size across the swath, modeled from radar aloft. It reflects the biggest stone the storm could support, which may differ from what actually fell.
Only the radar-estimated size surface resolved for Aug 27, 2026 — this storm produced no NEXRAD point detections over Mill Creek, so there is one map to show, not two.
The storm in context
Where Aug 27, 2026 sits in Mill Creek's hail record.
This was Mill Creek's 2nd recorded hail day, arriving 30 days after the Jul 28, 2026 storm. By severity it ranks 2nd of the 2 storms we have logged here. Radar put the day's largest stone over Mill Creek at 0.5" — radar-estimated size aloft.
The Aug 27, 2026 convective day was bigger than Mill Creek: the same system put hail over 365 other tracked cities, 42 of them in Pennsylvania. Nearest: Shirleysburg (14 miles south, up to 0.75"); Orbisonia (15 miles south, up to 0.5"); Lewistown (22 miles east, up to 0.5").
These maps are stills. In the app this date is one of 2 Mill Creek storm dates on a live map — both surfaces, the reports, and a replay — and the same map is where you draw the swath. This page rebuilds nightly.
Ground reports
What people on the ground reported
These are storm reports filed with the National Weather Service and released through the NOAA Storm Prediction Center — public-domain observations from spotters, the public, and NWS surveys. We quote each one exactly as filed.
No ground reports were filed with the National Weather Service for this storm over Mill Creek. That is common: a report depends on someone being there to see it and take the time to call it in. The radar surfaces above are the record here — the storm was detected from above even though no one on the ground logged it.
Below the severe threshold
What 0.5" hail means for Mill Creek roofs.
Radar signals under three-quarters of an inch stay below the National Weather Service severe threshold and generally indicate lower roof risk. Older or already-worn materials can still show effects, but radar alone cannot determine whether a specific roof was damaged.
Radar reading · not confirmed damage
Mill Creek hail history
Other storms in Mill Creek.
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