Hurricane Nora was a large tropical cyclone that caused significant damage across the Pacific Coast of Mexico in late August 2021.

The storm then grazed the west coast of Mexico and made landfall two separate times, first in the state of Jalisco, followed by neighboring Nayarit.

Nora caused extensive and destructive flooding as the cyclone traversed the coast of Mexico, with rainfall accumulations peaking at 523 mm (20.6 in) in the town of Melchor Ocampo in Michoacán.

[2] The NHC further raised the system's probability of intensification occurrence to "medium"[3] and then to "high" on the next day,[4] and by August 24, a broad area of low pressure formed over warm sea surface temperatures.

[6] Nora began to turn slightly northwest by the next day,[7] with a decline in wind shear allowing the storm to strengthen and develop convection on August 27.

[1] Its developing inner core became wrapped by deep convection with cold cloud tops,[8] and by 12:00 UTC, Nora was upgraded to a Category 1 hurricane.

Tropical storm watches were put in place from Cabo San Lucas and La Paz, Baja California Sur.

[12] Heavy rainfall occurred across the western coast of Mexico, with 300 mm (12 in) being recorded across coastal regions in Guerrero, Colima, Michoacán, Jalisco, Nayarit, and Sinaloa.

The Bahía de Banderas was evacuated as the level of the Ameca River continued to increase, with a temporary shelter being established in San Vicente.

[21] The Government of Michoacán declared states of emergency for the municipalities of Arteaga, Lázaro Cárdenas, Tumbiscatio, Aquila, and Coahuayana in the wake of Nora.

[11][15] Federal, state, and municipal authorities worked on coastal roads to help restore communication damage caused by downed lines and trees.