One of the most-reliable aspects of Kibo summit climate is when the extended dry season begins; typically between late May and early June. Despite considerable snow accumulation through 2018 long rains (see posts below), the dry season initiation this year appears to be right "on schedule".
Above is a view of Kibo from Moshi just after 7 am on 28 May (Simon Mtuy
credit), after a long period in which the mountain was shrouded in
clouds. Snowcover has changed little since March.
The timelapse below includes images every 5 days for the past month,
from ESA Sentinel-2 L1C data. Note the decreasing cloud cover thickness
and extent, and thinning of snowcover on the mountain flanks. Telemetry
of measurements from the summit reveals little change in snowdepth on
the Northern Icefield through the interval.
In the months ahead, all seasonal snow will likely sublimate and melt,
exposing glacier ice to radiant and turbulent energy. Without the
bright, protective snowcover, the area and thickness of the glaciers
will continue to diminish.