Hurricane Nana was a small, short-lived tropical cyclone that caused relatively minor damage in Belize and Mexico in early September 2020.

The wave gradually developed organized convection and a defined surface low on September 1, signifying the formation of Tropical Storm Nana as it approached Jamaica.

Persistent wind shear stifled development of the storm, though following repeated bursts of deep convection, it intensified into a minimal hurricane on September 3.

Nana attained peak winds of 75 mph (121 km/h)[nb 1] and a minimum pressure of 994 mbar (994 hPa; 29.4 inHg) shortly before striking Belize.

Collectively, economic losses in Central America and Mexico exceeded US$20 million[nb 2] as a result of the hurricane; however, no fatalities were reported.

[1] A broad area of disorganized convection, primarily east of the wave axis, accompanied the system as it emerged over the Atlantic Ocean early the next day.

[1][2] Convection increased by August 27 as the wave traversed the central Atlantic, and the NHC noted the possibility of gradual tropical cyclogenesis over the following days.

[4] Upon entering the Caribbean Sea on August 30, the system started to organize with evidence of a broad surface low apparent on satellite-derived observations.

[1] This marked the earliest formation of a season's fourteenth named storm, surpassing the previous record set by Hurricane Nate on September 6, 2005.

However, with the storm posing an imminent threat to Central America, the NHC initiated advisories on the system as Potential Tropical Cyclone Sixteen at 15:00 UTC.

[10] With a defined anticyclone aloft providing ample outflow, high sea surface temperatures, and low to moderate wind shear, steady intensification was expected.

[11] A small cyclone with tropical storm-force winds extending no more than 70 mi (110 km) from the center, Nana progressed along a generally westward trajectory in response to a subtropical ridge to the north.

Persistent moderate wind shear and intrusions of dry air inhibited significant development of the system as it passed 155 mi (249 km) south of the Cayman Islands.

[1] Early on September 2, a burst of deep convection with cloud tops as cold as −80 °C (−112 °F) developed over the storm's center and microwave satellite imagery revealed the formation of an eye-like feature.

[12][13] Wind shear briefly disrupted this development, with Nana's surface center displaced to the northeastern edge of the convective mass, before abating later that day.

Nana reached its peak intensity at this time with maximum winds of 75 mph (121 km/h) and a minimum pressure of 994 mbar (994 hPa; 29.4 inHg).

[16] Global weather models indicated conditions in the region were unfavorable for tropical cyclone development, and accordingly, the NHC did not expect Nana to redevelop.

[16] Multiple tropical storm watches and warnings were issued ahead of Nana for parts of Belize, Guatemala, Honduras, and Mexico between September 1 and 3.

[18] Between August 29–30, the Barbados Met Office and Dominica Meteorological Service issued flash flood watches for their respective nations in anticipation of moderate to heavy rains from the precursor wave.

[23] In St. Lucia, increased turbidity and clogging due to heavy rain forced the temporary closure of the Theobalds Treatment Plant, which cut the water supply to residents in northern parts of the country.

[25] Guatemala's National Coordinator for Disaster Reduction (Conred) alerted residents to potential flash floods, damaging winds, and power and water supply interruptions.

[34] Authorities emphasized that the region was vulnerable to floods due to soil saturation from the annual rainy season and the prolific rains from tropical storms Amanda and Cristobal in May and June earlier that year.

Floodwaters reached a depth of 3.3 ft (1 m) in several areas, leaving 14 communities temporarily isolated in the José Azueta and Isla municipalities.