1-minute GOES-18 “Clean” Infrared Window (10.3 µm) images with an overlay of the Total Precipitable Water derived product (in non-cloudy areas), from 0009-2349 UTC on 17 April [click to play MP4 animation]

1-minute Mesoscale Domain Sector GOES-18 (GOES-West) “Clean” Infrared Window (10.3 µm) images with an overlay of the Total Precipitable Water derived product (in non-cloudy areas) (above) showed that an axis of moisture was initially in place across all the Samoan Islands — peak TPW values were in excess of 2.0 in (brighter shades of magenta). The axis of moisture began to diminish somewhat over American Samoa after 0600 UTC — but as another lobe of higher moisture approached from the east around 1300 UTC, scattered showers began developing in the vicinity of the Manu’a Islands and Tutuila.

Since there is no radar coverage across the islands, 1-minute GOES-18 imagery was requested to support the 124th annual Flag Day celebration in American Samoa (which included numerous VIP visitors from the US Department of Defense and Legislature, Hawai’i State Department and local government).

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