Tropical Depression Four-E strengthened rapidly into Tropical Storm Dora on Sunday. At 11:00 p.m. EDT on Sunday the center of Tropical Storm Dora was located at latitude 16.4°N and longitude 104.3°W which put ti about 290 miles (470 km) south-southeast of Cabo Corrientes, Mexico. Dora was moving toward the west-northwest at 14 m.p.h. (22 km/h). The maximum sustained wind speed was 70 m.p.h. (110 km/h) and there were wind gusts to 80 m.p.h. (130 km/h). The minimum surface pressure was 996 mb.
The circulation of Tropical Storm Dora organized quickly on Sunday. A primary rainband wrapped tightly around the center of circulation. An eyelike feature appeared to be forming on microwave and infrared satellite images. Additional bands of showers and thunderstorms developed outside the core of Tropical Storm Dora. Thunderstorms around the core generated upper level divergence which pumped out mass in all directions.
Tropical Storm Dora will be moving through an environment very favorable for intensification on Monday. It will move over water where the Sea Surface Temperature (SST) is near 29°C. An upper level ridge over Mexico is producing easterly winds that are blowing toward the top of the circulation, but there is little vertical wind shear. A combination of warm water and little shear will allow Dora to intensify into a hurricane during the next 24 hours. The rate of intensification could increase once the formation of the eye is complete. Dora will move over cooler SSTs on Tuesday. The cooler SSTs will initially halt the intensification. When Dora is unable to extract sufficient energy from the upper ocean it will start to weaken.
A subtropical ridge northeast of Dora is steering the tropical storm toward the west-northwest and a general west-northwesterly motion is expected to continue for another day or two. On its anticipated track the center of Tropical Storm Dora will remain southwest of Mexico. Dora will pass south of Baja California on Tuesday.