THE UAP MAPCASE FILE← ALL CASES

Pomona, California, United States

A White Cylinder Over Pomona, California (4 April 2026)

At about 13:36 on 4 April 2026 a Pomona witness filmed a bright elongated white object nearly overhead. The object drifts slowly and shows a shifting ragged outline with no scale reference. Reflective balloon material or lightweight wind-borne debris is the leading explanation.

Date2026-04-04
LocationPomona, California, United States
TierTier 3
Evidence Score2/10
Media Score7/10

Why This Case Matters

A visually interesting daylight clip that demonstrates how an unresolved reflective object can acquire a 'cylinder' label despite flexible-looking edges and no range information.

Chronology

  • 4 Apr 2026 ~13:36 witness records overhead object
  • captures video and reportedly a closer still
  • camera stops near end
  • post shared 30 Jun 2026

The Witnesses

Reddit user Strong_Sleep378single reporting witness/camera operator

Evidence

The following evidence types are documented for this case:

Evidencesingle-witness phone video
Evidenceclaimed second still
Evidencestated time/location

Conventional explanations: Mylar/foil balloon, plastic sheet/bag or balloon cluster are leading candidates; distant aircraft is less likely but possible.

What Remains Unresolved

Key Takeaways

Sources

Primary and secondary sources for this case file: