Tropical Cyclone Iris redeveloped east of Queensland on Sunday night. At 11:00 p.m. EDT on Sunday the center of Tropical Cyclone Iris was located at latitude 16.9°S and longitude 148.7°E which put it about 190 miles (310 km) east of Cairns, Australia. Iris was moving toward the southwest at 8 m.p.h. (13 km/h). The maximum sustained wind speed was 45 m.p.h. (75 km/h) and there were wind gusts to 60 m.p.h. (95 km/h). The minimum surface pressure was 995 mb.
Tropical Cyclone Iris formed over the Coral Sea last week but wind strong vertical shear quickly weakened Iris into an area of low pressure. The low pressure system meandered over the Coral Sea east of Australia during the past few days. More thunderstorms developed near the center of circulation on Sunday and the Australian Bureau of Meteorology designated the system as Tropical Cyclone Iris again.
The circulation around Tropical Cyclone Iris was still reorganizing on Sunday night. A distinct low level center of circulation was evident on visible satellite images. More thunderstorms were developing near the center. A primary rainband wrapped around the northern, eastern and southern sides of the center of circulation. Bands northwest of the center consisted mainly of showers and low clouds. Storms near the core of the circulation generated upper level divergence which was pumping mass away to the east of the tropical cyclone.
Tropical Cyclone Iris will move through an environment somewhat favorable for intensification on Monday. Iris will move over water where the Sea Surface Temperature is 29°C. It is moving around the western end of an upper level ridge. The ridge is producing northwesterly winds which were blowing toward the top of the circulation. Those winds were causing moderate vertical wind shear and they may have been the reason for the lack of strong rainbands northwest of the center of circulation. The wind shear is likely to inhibit intensification, but it probably won’t prevent Tropical Cyclone Iris from intensifying on Monday.
Tropical Cyclone Iris was moving around the western end of a subtropical ridge which was steering Iris toward the southwest. Iris will likely move more toward the south and then southeast as it rounds the western end of the ridge. On its anticipated track Tropical Cyclone Iris is expected to remain east of Queensland.
Elsewhere over the South Pacific Ocean Tropical Cyclone Josie was swirling south of Fiji. At 11:00 p.m. EDT on Sunday the center of Tropical Storm Josie was located at latitude 21.1°S and longitude 178.1°E which put it about 185 miles (300 km) south of Suva, Fiji. Josie was moving toward the south-southeast at 14 m.p.h. (22 km/h). The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h). The minimum surface pressure was 999 mb.