Tropical Storm Rina rapidly intensified (CIMSS ADT plot) to hurricane intensity off the coast of Honduras on 24 October 2011 — GOES-13 0.63 Âµm visible channel images with an overlay of ASCAT scatterometer surface winds from the CIMSS Tropical Cyclones site (above) showed that Hurricane Rina exhibited a central dense overcast early in the day, with convective bursts near the center of the circulation.
A longer animation of GOES-15 10.7 Âµm IR channel images (below; click image to play animation) revealed a number of convective bursts, with large areas of the central dense overcast exhibiting cloud top IR brightness temperatures of -80ÂºC or colder (violet color enhancement).
AWIPS images of the MIMIC Total Precipitable Water (TPW) product (below; click image to play animation) suggested that Hurricane Rina may have been tapping moisture from the Eastern Pacific Ocean Intertropical Convergence Zone / Monsoon Trough.
It is interesting to note that an increasing pressure gradient between high pressure located over the Gulf of Mexico and the deepening circulation of Hurricane Rina was beginning to enhance the intensity of dry Tehuano gap winds flowing southward into the Gulf of Tehuantepec (below).
===== 25 October Update =====
On 25 October 2011, widespread high altitude cirrus “transverse banding” was seen along the western periphery of Hurricane Rina on a 1-km resolution NOAA-16 false color Red/Green/Blue (RGB) image (above), created using AVHRR visible channels 1 (0.63 Âµm) and 2 (0.86 Âµm) along with IR channel 4 (10.8 Âµm).
4-km resolution GOES-13 6.5 Âµm “water vapor channel” images (below; click image to play animation) showed that Hurricane Rina was a prolific producer of transverse banding during much of the day. The GOES-13 satellite had been placed into Rapid Scan Operations (RSO) mode, providing images as often as every 5-10 minutes.
1-km resolution GOES-13 0.63 Âµm visible channel RSO images (below; click image to play animation) revealed the formation of a well-defined eyewall during the afternoon hours.