Henri becomes a hurricane off the US East Coast

August 21st, 2021 |

GOES-16 “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images [click to play animation | MP4]

Tropical Storm Henri intensified to become a hurricane at 1500 UTC on 21 August 2021  — and 1–minute Mesoscale Domain Sector GOES-16 (GOES-East) “Red” Visible (0.64 µm) images and “Clean” Infrared Window (10.35 µm) images (above) showed Henri during the 1400-2300 UTC period. Visible images indicated that a small-diameter inner core began to form later in the day.

Henri was moving through an environment of light to moderate deep-layer wind shear, as seen in an animation of GOES-16 Infrared images from the CIMSS Tropical Cyclones site (below),

GOES-16 Infrared images, with contours of deep-layer wind shear [click to enlarge]

During the preceding nighttime hours, a toggle between Suomi NPP VIIRS Infrared and Day/Night Band images at 0710 UTC (below) showed a large convective burst east of the surface center.

Suomi NPP VIIRS Infrared Window (11.45 µm) and Day/Night Band (0.7 µm) images [click to enlarge]

 

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