Tropical Storm Katia forms over the far eastern Atlantic

August 30th, 2011 |
GOES-13 Visible (0.63 µm) images (click image to play animation)

GOES-13 Visible (0.63 µm) images (click image to play animation)

An area of disturbed weather that emerged off the coast of Africa over the weekend has acquired sufficient organized convection to be classified as a Tropical Storm, Katia, the 11th named storm of this active Atlantic Hurricane Season. Analyses from the CIMSS Tropical Weather Website show the storm just south of a region of dry air from the Sahara. Shear analyses at the site show that Katia is projected to move into a region of decreasing shear in the next 24 hours. In addition, sea surface temperatures are warm. The forecast from the National Hurricane Center suggests slow strengthening over the next 3 days.

Overshooting Tops diagnosed with MSG data (click image to play animation)

Overshooting Tops diagnosed with MSG data (click image to play animation)

Overshooting tops diagnosed using MSG data (at this site) (above) show a decrease in OT generation over the center of the system today, coincident with warming of the cloud tops. Variability in the number of OTs is common, as shown here.

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