Baja California Peninsula as a tropical storm. It further weakened to a tropical depression on October 2, after the convection became displaced from the elongating center. At 11:00 UTC on October 2, Rosa made landfall about southeast of Punta San Antonio in Baja California, becoming the first tropical cyclone to move over the state since Nora of 1997. During its approach towards the Gulf of California, Rosa exhibited an increasingly unwound and diffuse structure, prompting the NHC to declassify it as a tropical cyclone at 15:00 UTC. Shortly after, forecasters at the Weather Prediction Center (WPC) noted that the low- and mid-level circulations of Rosa's remnant had decoupled; the mid-level remnants proceeded into northeast Arizona, while the lower segment traced behind it over the Gulf of California. On October 3, in their final advisory on the system, the WPC reported that the remnants had been absorbed into a deepening non-tropical low off the coast of California. Preparations, impact, and aftermath Mexico The Government of Mexico issued a tropical storm watch on September 29 for the Pacific Coast of the Baja California Peninsula from Punta Abreojos to Cabo San Quintín. The watches on the west coast of Baja California were changed to tropical storm warnings, and watches were issued for the east coast of Baja California from Bahía de los Angeles to San Felipe on the next day. All the watches and warnings were discontinued after Rosa weakened to a tropical depression. The State Unit of Civil Protection of Sonora issued a yellow alert (imminent severe weather) for 11 municipalities and a green alert (possible severe weather) for 19 municipalities on September 30. A red alert was issued for San Felipe on October1 as Rosa approached Baja California. On the same day, schools were closed in several communities throughout Baja California as well as in the neighboring state of Sonora. The Marine Plan, an evacuation and rescue plan, was activated in the states of Baja California, Baja California Sur, Sonora, and Sinaloa. Because of its significant weakening before landfall, Rosa had a relatively minor impact in Mexico. Rainfall was heaviest in Baja California, peaking at in Percebu and at in San Felipe. A rainfall total of occurred in Sonoyta, Sonora, near the US-Mexico border. Floods in San Felipe collapsed part of a highway and opened up a sinkhole in the city's port. The port suffered MX$10 million (US$530,000) in losses following