| Tropical storm (SSHS) | |
|---|---|
| Tropical Storm Hallie to the east of Florida on October 25, 1975 | |
| Formed | October 24, 1975 |
| Dissipated | October 27, 1975 |
| Highest winds | 1-minute sustained: 50 mph (85 km/h) |
| Lowest pressure | 1002 mbar (hPa; 29.59 inHg) |
| Fatalities | None reported |
| Areas affected | The Bahamas, North Carolina |
| Part of the 1975 Atlantic hurricane season | |
Tropical Storm Hallie was a tropical storm during October 1975 that existed as three types of cyclones: subtropical, tropical, and extratropical. The eighth and final named storm of the 1975 Atlantic hurricane season, Hallie formed on October 24 from the complex interaction of several weather systems. Initially a subtropical depression, it tracked northeast parallel to the coast of the Southeast United States, and obtained fully tropical characteristics on October 26. Hallie ultimately peaked as a moderate tropical storm before being absorbed by a frontal zone late on October 27. Damage from the storm was minimal, and was limited to light precipitation and slightly above-average tides.
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A frontal trough moved off the East Coast of the United States and entered the western Atlantic Ocean on October 18, 1975. The southern portion of the system became stationary near the Bahamas; simultaneously, a cut-off upper-level low pressure area formed in the same region. The disturbance remained stationary while producing clouds and shower activity for several days. At the same time, a tropical wave moved westward across the Atlantic, and by October 23, part of the wave had merged with the disturbance over the Bahamas. The resultant storm developed into a subtropical depression on October 24, while centered approximately 100 mi (160 km) east of Daytona Beach, Florida.[1][2]
The depression started drifting to the north on October 25, while developing tropical characteristics. Tracking roughly parallel to the coast, the cyclone maintained its general northward track until October 26, when it lost its subtropical characteristics and intensified into a tropical storm, receiving the name Hallie. At the time of designation, Hallie was situated about 100 mi (160 km) east of Charleston, South Carolina.[1][2] Hallie accelerated to the northeast during the next 24 hours. On October 27, it attained its peak intensity with winds of 50 mph (80 km/h) and minimum central pressure of 1002 millibars. The storm merged with a frontal zone and became extratropical later that day off the coast of Virginia.[1][2]
The precursor to Hallie produced extensive cloudiness precipitation through the Bahamas.[3] On October 27, gale warnings were issued for portions of the Outer Banks of North Carolina, and small craft advisories were posted for coastal areas from Georgia to Virginia.[4] Tides along the North Carolina and Virginia coasts generally ran 1 to 2 ft (0.30 to 0.61 m) above normal. Light to moderate rainfall was reported, peaking at 2.55 in (65 mm) in Manteo, North Carolina.[3] Additionally, the pressure gradient between Hallie and a high pressure system over the United States generated increased winds across much of the East Coast.[1] Roughly 10,000 people were threatened by the tropical storm, none of whom needed to be evacuated.[5] However, because the storm remained primarily offshore, damage was minimal, and no fatalities were reported.[6]
