page_title: Tropical Storm Andrea (2013)
section_title: Meteorological history
hierarchical_section_title: Tropical Storm Andrea (2013) / Meteorological history
caption_attribution_description: English: Track map of Tropical Storm Andrea of the 2013 Atlantic hurricane season. The points show the location of the storm at 6-hour intervals. The colour represents the storm's maximum sustained wind speeds as classified in the Saffir–Simpson scale (see below), and the shape of the data points represent the nature of the storm, according to the legend below. Saffir–Simpson scale Tropical depression≤38 mph≤62 km/h Category 3111–129 mph178–208 km/h Tropical storm39–73 mph63–118 km/h Category 4130–156 mph209–251 km/h Category 174–95 mph119–153 km/h Category 5≥157 mph≥252 km/h Category 296–110 mph154–177 km/h Unknown Storm type Tropical cyclone Subtropical cyclone Extratropical cyclone / Remnant low / Tropical disturbance / Monsoon depression
context_page_description: Tropical Storm Andrea brought flooding to Cuba, the Yucatan Peninsula, and portions of the East Coast of the United States in June 2013. The first tropical cyclone and named storm of the annual hurricane season, Andrea originated from an area of low pressure in the eastern Gulf of Mexico on June 5. Despite strong wind shear and an abundance of dry air, the storm strengthened while initially heading north-northeastward. Later on June 5, it re-curved northeastward and approached the Big Bend region of Florida. Andrea intensified and peaked as a strong tropical storm with winds at 65 mph on June 6. A few hours later, the storm weakened slightly and made landfall near Steinhatchee, Florida later that day. It began losing tropical characteristics while tracking across Florida and Georgia. Andrea transitioned into an extratropical cyclone over South Carolina on June 7, though the remnants continued to move along the East Coast of the United States, until being absorbed by another extratropical system offshore Maine on June 10.
  Prior to becoming a tropical cyclone, the precursor to Andrea dropped nearly 12 inches of rainfall on the Yucatán Peninsula.
context_section_description: At the end of May 2013, a broad and diffuse cyclonic disturbance developed over eastern Mexico and northern Central America, incorporating the remnants of eastern Pacific Hurricane Barbara. As a tropical wave approached from the east, an inverted trough developed on the northern edge of the active region on June 2, setting the stage for the formation of a weak surface low pressure system over the southern Gulf of Mexico the next day. The National Hurricane Center (NHC) began monitoring the system in their Tropical Weather Outlooks, and bulletins were issued every six hours regarding the probability of tropical cyclone formation within 48 hours. A nearby upper trough created unfavorable conditions for tropical cyclogenesis, subjecting the low to wind shear and abundant dry air that kept it indistinct and disorganized. On June 5, the environment became less hostile, and the system began to improve in structure.
  On June 5, a Hurricane Hunters flight found a closed center and winds of 40 mph (65 km/h). In response, the NHC initiated advisories on Tropical Storm Andrea later that day, while centered about 310 miles (500 km) southwest of St. Petersburg, Florida. Due to somewhat unfavorable conditions, significant strengthening was initially considered unlikely. Early on June 6, deep convection was displaced well to the east and southeast of the center as a result of wind shear up to 29 mph (47 km/h). Despite this, Andrea intensified to attain peak winds of 65 mph (100 km/h) at 1200 UTC that day. Thereafter, unfavorable conditions, including dry air entrainment caused the storm to weaken slightly. At 2200 UTC on June 6, Andrea made landfall in Dixie County, Florida about 10 miles (15 km) south of Steinhatchee. Simultaneously, the storm attained its minimum barometric pressure of 992 mbar (29.3 inHg).
  After moving inland on June 6, the NHC noted that extratropical transition was likely within 24 hours and that it "could occur sooner if the convective structure does not improve." By later on June 7, most of the convection became displaced to the northwest due to dry air. Around that time, the storm began accelerating northeastward at 26 mph (42 km/h) due to an approaching mid-latitude trough. Based on ground observations and Doppler radar, the system transitioned into an extratropical cyclone at 1800 UTC on June 7, while located over northeastern South Carolina. The remaining thunderstorms around Andrea became indistinguishable from those associated with a frontal zone over North Carolina. Due to a policy created in response to Hurricane Sandy, the NHC continued to issue advisories on the remnants of Andrea as it remained a threat to the East Coast of the United States. On June 8, it moved rapidly northeastward across the Mid-Atlantic and New England. Because gale-force winds were located well to the southeast of the center, the NHC ceased advisories on the remnants of Andrea. Upon reaching the Gulf of Maine, the extratropical remnants of Andrea were absorbed by another extratropical low pressure area around 0000 UTC on June 9.
caption: Map plotting the track and the intensity of the storm, according to the Saffir–Simpson scale
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