2013 Somalia cyclone

Deep Depression ARB 01

Deep depression (IMD scale)
Tropical storm (Saffir–Simpson scale)
ARB 01 just off the coast of Somalia on November 10
Formed	November 8, 2013
Dissipated	November 11, 2013
Highest winds	3-minute sustained: 55 km/h (35 mph) 1-minute sustained: 85 km/h (50 mph)
Lowest pressure	1002 hPa (mbar); 29.59 inHg
Fatalities	162 confirmed, about 300 missing
Areas affected	Somalia (Puntland), Ethiopia
Part of the 2013 North Indian Ocean cyclone season

The 2013 Somalia cyclone, officially Deep Depression ARB 01, was the second deadliest tropical cyclone worldwide in 2013 as well as the deadliest to affect Somalia in its history. It formed as a depression in the Arabian Sea on November 8 and made landfall over Puntland as a deep depression on November 11. Although ARB 01 was a weak system, it still killed 162 people across the country while about 300 others were reported missing.

On November 6, 2013, the Joint Typhoon Warning Center (JTWC) began monitoring a broad low-pressure area over the southeastern Arabian Sea. Accompanied by bursts of convective activity, the low tracked generally westward over an area slightly favoring tropical cyclogenesis. Moderate wind shear offset the positive effects of upper-level outflow, though high sea surface temperatures aided further development. By November 8, organized banding features wrapped around the northwestern side of a consolidating circulation. Subsequently, the India Meteorological Department (IMD) classified the disturbance as Depression ARB 01 at 1000 UTC, making it the first tropical cyclone in the Arabian Sea during 2013. At this time, the depression was located about 680 km (425 mi) east-southeast of Ras Binnah, Somalia. Based on continued development, the JTWC issued a Tropical Cyclone Formation Alert two hours later before declaring the system as Tropical Cyclone 03A at 2100 UTC. A subtropical ridge to the north steered the system on a westward course that would bring it over Somalia in two days. Some limited intensification was anticipated, though it was also noted dissipation before landfall was possible.