Tropical Storm Bonnie downgraded to a Tropical Depression

July 23rd, 2010 |
GOES-13  0.63 µm visible images

GOES-13 0.63 µm visible images

GOES-13 0.63 µm visible images (above) and GOES-13 10.7 µm IR images (below) from the CIMSS Tropical Cyclones site showed Tropical Storm Bonnie crossing southern Florida on 23 July 2010.

GIES-13 10.7 µm IR images

GIES-13 10.7 µm IR images

Bonnie was encountering increasing amounts of southeasterly deep layer (850-200 hPa) wind shear (below), which was acting to displace the strongest convection to the north and northwest of the low-level center of the tropical cyclone.

GOES-13 IR image + Deep layer wind shear

GOES-13 IR image + Deep layer wind shear

Hourly Atmospheric Motion Vectors (AMVs) produced using GOES-13 and Meteosat-9 data (below) showed that Bonnie was being steered northwestward by the flow between a strong ridge over the southeastern US and an upper level low over the western Gulf of Mexico.

Hourly GOES-13 + Meteosat-9 water vapor winds

Hourly GOES-13 + Meteosat-9 water vapor winds

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MODIS 0.65 µm visible + 11.0 µm IR images

MODIS 0.65 µm visible + 11.0 µm IR images

AWIPS images of 1-km resolution visible and IR channel data from MODIS (above) and POES AVHRR (below) show Bonnie as it moved across the Florida peninsula and weakened from a Tropical Storm to a Tropical Depression.

AVHRR 0.63 µm visible + 10.8 µm IR images

AVHRR 0.63 µm visible + 10.8 µm IR images

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