During the preceding nighttime hours, the remnant LLCC could be seen on a Suomi NPP VIIRS Day/Night Band image at 0631 UTC or 2:31 AM local time (below), still inland over southeastern Georgia.The LLCC was also seen on the morning Terra MODIS Visible (0.64 µm) image (below); the coldest MODIS Infrared (11.0 µm) cloud-top IR brightness temperatures associated with the deep convection east of the LLCC were -82º C (violet color enhancement). The 10-day motion of the vorticity field associated with Tropical Storm Erika (and its remnants) can be followed using the atmospheric motion vector (AMV) 850 hPa Relative Vorticity product from the CIMSS Tropical Cyclones site (below; click to play animation).
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 this was initiated by an outflow boundary from the ongoing thunderstorm activity farther offshore or was aided by enhanced boundary layer convergence in the vicinity of the LLCC.GOES-13 (GOES-East) Visible (0.63 µm) images (above; click to play animation) revealed the low-level circulation of the remnants of
NHC discussion on the following morning, Fred was the first hurricane to pass through the Cape Verde Islands since 1892. While no central eye was apparent on GOES-13 (GOES-East) Visible (0.63 um) and Infrared (10.7 um) images at 0845 UTC (above), a DMSP SSMIS 85 GHz microwave image sourced from the CIMSS Tropical Cyclones site did reveal a small eye at 0904 UTC (below). Later in the day, a few Tropical Overshooting Tops were analyzed using Meteosat-10 Infrared (10.8 um) imagery (below). More information about Hurricane Fred can be found here.Tropical Storm Fred reached hurricane intensity east of the Cape Verde Islands late in the day on 30 August 2015. As mentioned in the
SSEC RealEarth site (above; click to enlarge) showed Hurricanes Kilo, Ignacio, and Jimena in the central and eastern North Pacific Ocean on 29 August 2015. All three of these Category 4 North Pacific hurricanes were located east of the International Dateline, which is the first such occurrence since reliable records began in the satellite era.A composite of Suomi NPP VIIRS true-color Red/Green/Blue (RGB) images from the
An animation of GOES-15 (GOES-West) Infrared (10.7 µm) images (below; click image to play animation) showed the evolution of these 3 tropical cyclones during the 29-30 August period.The MIMIC Total Precipitable Water product (below; click image to play animation) indicated that all 3 storms were easily able to tap abundant moisture from the Intertropical Convergence Zone (ITCZ). A longer animation of the MIMIC TPW product covering the period 21 August to 01 September is shown below.