Tropical Depression Nine in the Atlantic Ocean, above, shows characteristics of a heavily sheared storm (longer sunrise-to-sunset animations: gif | mp4). The low-level circulation is displaced south and west of the strongest convection (which is vigorous enough to produce occasional overshooting tops, below, as shown on this page).Metop-B overflew Tropical Depression Nine’s... Read More

Some locations in southern California received record daily precipitation on 15 September 2015. A time series plot of weather conditions for Los Angeles International Airport is shown above; the 1.80 inches of rainfall received there made it the wettest September day on record.As mentioned in the NWS Los Angeles record event report, the moisture... Read More

GOES-15 Visible (0.63 µm) images (above; click image to play animation) showed the low-level circulation center (LLCC) of Tropical Storm Jimena becoming exposed as the tropical cyclone encountered increasing amounts of westerly deep-layer wind shear. Jimena had rapidly intensified to a Category 4 hurricane over the East Pacific Ocean in late... Read More

GOES-13 (GOES-East) Visible (0.63 µm) images (above; click to play animation) revealed the low-level circulation of the remnants of Tropical Storm Erika moving off the coast of Georgia early in the day on 03 September 2015 (15 UTC surface analysis). Although there was one brief convective burst over the low-level circulation center (LLCC), it is unclear whether... Read More