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Extratropical transition of Hurricane Oscar

By Scott Bachmeier •

Sequence of GOES-16 Low-level (7.3 µm), Mid-level (6.9 µm) and Upper-level (6.2 µm) Water Vapor images [click to play MP4 animation]

Sequence of GOES-16 Low-level (7.3 µm), Mid-level (6.9 µm) and Upper-level (6.2 µm) Water Vapor images [click to play MP4 animation]

A sequence of GOES-16 (GOES-East) Low-level (7.3 µm), Mid-level (6.9 µm) and Upper-level (6.2 µm) Water Vapor images (above) showed the transition of Category 1 Hurricane Oscar to a hurricane-force extratropical storm over the western Atlantic Ocean on 31 October 2018. The very sharp moisture gradient that developed along the western and northern edges highlighted the “”limiting streamline” of airflow through the cyclone — and a remarkably warm/dry signature (yellow to orange enhancement) was seen near the storm center late in the period.

A closer view of the GOES-16 Water Vapor imagery using AWIPS is shown below, which includes plots of buoy/ship reports and surface analyses.

Sequence of GOES-16 Low-level (7.3 µm), Mid-level (6.9 µm) and Upper-level (6.2 µm) Water Vapor images [click to play MP4 animation]

Sequence of GOES-16 Low-level (7.3 µm), Mid-level (6.9 µm) and Upper-level (6.2 µm) Water Vapor images [click to play MP4 animation]

Categories: GOES-16, Tropical cyclones