Ambiguous afternoon-long threshold

2. T+02:00:00 [intensity]

intensity 

± PLUS/MINUS — Threshold — something may be present, but it's right at the edge of perception. A stronger experience would confirm it; otherwise it may be nothing.

3. T+00:00:00 [note]

A hazy sense of something, described as a kind of thinness, hovered through the afternoon, possibly with a brief cardiovascular flutter, though nothing felt fully convincing. The writer judged it a threshold effect at best.