Tropical Storm Genevieve spun up quickly south of Mexico on Sunday.  At 5:00 p.m. EDT on Sunday the center of Tropical Storm Genevieve was located at latitude 12.2°N and longitude 99.2°W which put it about 410 miles (665 km) south-southeast of Zihuatanejo, Mexico.  Genevieve was moving toward the west-northwest at 20 m.p.h. (32 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 1004 mb.

The circulation around former Tropical Depression Twelve-E organized quickly on Sunday afternoon and the National Hurricane Center upgraded the system to Tropical Storm Genevieve.  More thunderstorms developed near the center of circulation.  Bands of showers and thunderstorms were revolving around the center of Genevieve.  Storms near the center were generating upper level divergence which was pumping mass away from the tropical storm.  Winds to tropical storm force extended out 100 miles (160 km) from the center of circulation.

Tropical Storm Genevieve will move through an environment very favorable for intensification during the next several days.  Genevieve will move over water where the Sea Surface Temperature is near 30°C.  It will move through a region where the upper level winds will be weak and there will be little vertical wind shear.  Tropical Storm Genevieve will intensify rapidly.  Genevieve will strengthen into a hurricane within 24 hours and it could intensify into a major hurricane during the next 48 hours.

Tropical Storm Genevieve will move around the southern side of a ridge of high pressure over the southwestern U.S. and northern Mexico.  The ridge will steer Genevieve toward the west-northwest.  On its anticipated track Tropical Storm Genevieve could pass south of the Baja California during the middle of the week.