However, the system didn't officially become a tropical low until 06:00 UTC on 10 December, when the Australian Bureau of Meteorology (BoM) started to issue bulletins on it.

Later, cyclone pre-watches were issued for the whole island of New Caledonia as Ruby slowly approached the archipelago, with warnings being further upgraded to Alert Level 2.

Over 2,000 residential areas lost electricity as Ruby touched down in the archipelago, with reports of trees being uprooted, in one case damaging a house.

[4] Meanwhile, on 8 December at 06:00 UTC, the Joint Typhoon Warning Center started to track the system as "Invest 93P" while it was 225 nautical miles (417 km; 259 mi) to the west of Honiara, Solomon Islands.

The sprawling disturbance was analyzed as being located in a "marginally favorable" environment by the JTWC, citing low to moderate wind shear and conducive 30–31 °C (86–88 °F) sea surface temperatures.

[1] At 21:00 UTC, the JTWC upgraded the system to a tropical storm more than 767 nautical miles (1,420 km; 883 mi) to the northwest of Noumea, New Caledonia.

[8] With improving satellite presentations and Dvorak estimates, the BoM upgraded 07U to a Category 1 tropical cyclone by 00:00 UTC the next day, giving it the name Ruby.

[9] At 10:00 AEST (00:00 UTC) of 13 December, Ruby reached its peak intensity, according to the BoM, with maximum 10-minute winds of 60 knots (110 km/h; 69 mph),[1] before moving over the South Pacific basin.

[15] With its deep convection quickly reducing,[1] and the storm's center continuing to elongate,[16] the FMS downgraded Ruby to a Category 1 tropical cyclone 12 hours later.

[21] Due to the cyclone's tropical low predecessor along with a trough active over the country, the Solomon Islands Meteorological Services issued a strong wind and heavy rain warnings for the archipelago.

Ferry services bound for the Isle of Pines, Belep and Ouaième were halted, and Air Calédonie flights for 14 December were canceled.

[30] 678 households in Canala, Kaala-Gomen and Koumac lost electricity due to Ruby, and power outages disrupted some reservoirs in Voh.