Tropical Depression One (2009)
| Tropical depression (SSHWS/NWS) | |
Tropical Depression One off the U.S. East Coast on May 28
|
|
| Formed | May 28, 2009 |
|---|---|
| Dissipated | May 30, 2009 |
| (Extratropical after May 29) | |
| Highest winds |
1-minute sustained: 35 mph (55 km/h) Gusts: 45 mph (75 km/h) |
| Lowest pressure | 1006 mbar (hPa); 29.71 inHg |
| Fatalities | None reported |
| Damage | None |
| Areas affected | Coastal North Carolina |
| Part of the 2009 Atlantic hurricane season | |
Tropical Depression One was the first tropical cyclone to develop during the 2009 Atlantic hurricane season. Upon being declared a tropical depression on May 28, it marked the third time that a pre-season storm formed in three consecutive years. Originating from a disorganized area of low pressure off the coast of North Carolina, Tropical Depression One quickly developed over the Gulf stream. After attaining winds of 35 mph (55 km/h) along with a minimum pressure of 1006 mbar (hPa; 29.71 inHg), the depression began to weaken due to increasing wind shear and cooling sea surface temperatures. During the afternoon of May 29, convection associated with the system was significantly displaced from the center of circulation; this led the National Hurricane Center to issue their final advisory on the depression as it had degenerated into a remnant-low pressure area. As a tropical cyclone, Tropical Depression One had no effects on land; however, the precursor to the depression brought minor rainfall and light winds to parts of coastal North Carolina. Its track, formation, and timing were relatively similar to Tropical Storm One of the 1940 Atlantic hurricane season.
During mid-May, a frontal boundary stalled near The Bahamas and slowly degenerated. On May 25, a shortwave trough caused the northern portion of the system to move north of the Bahamas. The following day, an area of low pressure developed along the boundary about 290 miles (465 km) south-southwest of Wilmington, North Carolina. Tracking towards the north, the system became increasingly organized. On May 27, the National Hurricane Center (NHC) began issuing Tropical Weather Outlooks for the low while it was located about 120 miles (195 km) south of Cape Hatteras, North Carolina. An upper-level ridge situated to the southeast of the system was steering it towards the northeast. The NHC issued their final outlook on the low around 0000 UTC on May 28 while the system was located about 90 mi (150 km) east of Cape Hatteras, North Carolina, as development of the low was not expected.
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