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Tropical Storm Alberto (01L) Near South Carolina and Georgia – May 20th, 2012

31.2N 80.4W

May 20th, 2012 Category: Image of the day, Tropical Storms

Tropical Storm Alberto (01L) - May 19th, 2012

Tropical Storm Alberto (01L) - May 20th, 2012

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Track of Tropical Storm Alberto (01L) - May 20th, 2012 © Univ. of Wisconsin

Track of TS 01L

On May 19, the National Hurricane Center determined that the low pressure area off of the coast of South Carolina had acquired tropical characteristics and began issuing advisories at 5:00 PM EDT. The initial intensity was set at 45 MPH, but an observation from a passing ship prompted the NHC to increase the strength to 60 MPH in an intermediate advisory issued at 6:50 PM.

Later that night Alberto began to suffer from southeasterly shear and dry air entrainment, which prompted the National Hurricane Center to lower the intensity to 50 MPH. Alberto held this intensity until 11:00 AM on Sunday when continued shear caused the center to become fully exposed and the convection associated to be pushed to the west of the circulation. The intensity was then lowered to 45 MPH pending a Hurricane Hunters reconnaissance mission scheduled for Sunday afternoon.

As of 5 p.m. EDT (2100 UTC) May 20, Tropical Storm Alberto (01L) is located within 15 nautical miles of 30.9°N 80°W, about 105 mi (170 km) southeast of Savannah, Georgia and about 130 mi (210 km) south of Charleston, South Carolina. Maximum sustained winds are 40 knots (45 mph, 75 km/h), with stronger gusts. Minimum central pressure is 1006 mbar (hPa; 29.71 InHg), and the system is moving southwest at 5 kt (6 mph, 9 km/h). Tropical storm force winds extend outward up to 60 miles (95 km) from the center of Alberto.

Tropical Storm Alberto (01L) First Storm of 2012 Atlantic Hurricane Season – May 19th, 2012

30.7N 79.3W

May 19th, 2012 Category: Image of the day, Tropical Storms

Tropical Storm Alberto (01L) - May 19th, 2012

Tropical Storm Alberto (01L) - May 19th, 2012

Enhanced image

Track of Tropical Storm Alberto (01L) - May 19th, 2012 © Univ. of Wisconsin

Track of TS 01L

On May 18th, a low pressure system stalled just off the coast of South Carolina, and developed. On May 19th, it quickly gained tropical characteristics, and was named Tropical Storm Alberto (01L) that afternoon. Soon afterwards, Tropical Storm Alberto quickly began to strengthen, as it slowly moved southwestwards, closer to the South Carolina coast.

Alberto is the first named storm in May, in the Atlantic basin, since Arthur in 2008, and the earliest tropical storm (with non-subtropical origins) since Ana in April 2003. Combined with Aletta’s preseason development in the northeast Pacific ocean, this became the first occurrence where systems reached tropical storm status in both the Atlantic and East Pacific basins, prior to the official start date of their respective hurricane seasons.

As of 6:50 p.m. EDT (2250 UTC) May 19, Tropical Storm Alberto is located within 30 nautical miles of 32.2°N 77.9°W, about 140 mi (225 km) east-southeast of Charleston, South Carolina and about 120 mi (195 km) south of Cape Fear, North Carolina. Maximum sustained winds are 50 knots (60 mph, 95 km/h), with stronger gusts. Minimum central pressure is 995 mbar (hPa; 29.38 InHg), and the system is moving southwest at 3 kt (3 mph, 6 km/h).