Isaias is expected to meander east in the Gulf before taking a northeasterly turn and will likely rapidly intensify, according to the NHC. The storm is expected to make landfall early Saturday morning as a hurricane with winds of 105 mph.

San Diego is under a tropical storm watch for only the second time on record as Tropical Storm Rachel is forecast to make landfall in Mexico’s northern Baja California Peninsula early Sunday morning,

Sustained winds are considered “damaging” when they reach 50 knots, or 58 m.p.h., and can start to break tree limbs and tear off roof shingles. More widespread damage occurs as winds reach and exceed hurricane force, which is 74 m.p.h.

The weekend forecast in Arizona is stormy with activity from Tropical Storm Rachel starting Oct. 10. Showers and storms, gusty winds are expected.

Tropical Storm Rachel is likely to bring more flooding as the storm pounds the coast with high tides, rain and surf.

Southern California is within the hurricane center's cone forecast graphic for the movement of Rachel's dissipating center as a post-tropical storm.

Three storms will make landfall in the span of just a couple of days, with Simon tracking toward Mexico, Rachel nearing California and Isaias closing in on the Gulf Coast.

The National Hurricane Center initiated advisories -- and the all-important track maps -- on Tropical Depression Nine on Tuesday afternoon. Forecasters said the depression could become Tropical Storm Isaias (pronounced ees-ah-EE-ahs) by Wednesday and then the first hurricane of 2026 on Thursday as it tracks northward toward the Gulf Coast.