Tropical Storm Barry (2001)

Map plotting the track and the intensity of the storm, according to the Saffir–Simpson scale

On July 24, 2001, a tropical wave emerged off the west coast of Africa, and tracked westward across the Atlantic Ocean. Little cyclonic development occurred until July 28, when convection began to increase along the wave. The wave moved into the eastern Caribbean on July 29, and its convection continued to increase while it tracked west-northwest over the subsequent few days. The disturbance emerged into the Gulf of Mexico on August 1, with rainfall noted over southern Florida and the western tip of Cuba. That same day, a broad low-pressure system developed along the wave near the Dry Tortugas at the end of the Florida Keys, which began to intensify as it moved northwestward. At around 1800 UTC on August 2, an Air Force Reserve Hurricane Hunter aircraft investigating the system discovered that the low had organized into a tropical storm, which received the name Barry. Post-hurricane season reanalysis, however, revealed that the low had become a tropical depression six hours earlier. There is uncertainty as to whether Barry actually held tropical characteristics at the time of designation, because of an upper-level low that was situated over the cyclone's surface center.[1]

When Barry became a tropical cyclone, its convection wrapped around roughly half of the center. Outflow in the eastern semicircle was good, although due to upper-level wind shear, it was restricted to southeast of the circulation.[2] The cyclone became embedded within a mid- to-upper-level trough between the ridge over the central U.S. and the ridge over the northwestern Caribbean. A strong, upper-level cyclonic shear axis extended from just south of Cape Hatteras to near Brownsville, Texas, which prevented Barry from accelerating in forward speed.[3] The ridge over the United States weakened, thus collapsing the steering pattern; this resulted in a west-southwestward drifting motion of the tropical storm by around August 3.[1] Early on August 3, strong westerly winds prevailed, and separated the center of circulation from what limited convection remained.[4] The storm quickly regained some convection, although maximum sustained winds remained weak, at about 40 mph (60 km/h).[5] Despite a slight drop in barometric pressure, post-season analysis revealed Barry weakened into a tropical depression early on August 4 due to the persistent wind shear and falling external pressure.[1]

At 1800 UTC on August 4, the cyclone re-intensified slightly, and was upgraded to a tropical storm[1] as the shear decreased.[6] Early on August 5, a strengthening period began as deep convection ignited over and near the low-level center.[7] Prior to landfall, banding features developed on the eastern half of the circulation, despite some residual westerly shear.[8] Within seven hours, the barometric pressure dropped from 1004 mb to 990 mb and overall satellite presentation had begun to improve. Barry reached its peak intensity at 1800 UTC on August 5 with winds of 70 mph (110 km/h), just shy of hurricane status.[1] An eye formed at around the same time. At 0500 UTC on August 6, Barry increased in forward speed and made landfall at Santa Rosa Beach, Florida with winds of 70 mph (110 km/h).[9] Moving inland, the system weakened rapidly to a tropical depression; the National Hurricane Center issued its last advisory on the storm early on August 6.[10] By the evening hours, maximum sustained winds near the center were around 5 mph (8.0 km/h) to 10 mph (16 km/h), as the system slowed significantly and drifted northwest at about 7 mph (11 km/h).[11] The depression turned northwestward, and steadily weakened to a remnant low near Memphis, Tennessee on August 7, and the remnant low dissipated on August 8, over southeastern Missouri.[1]

Radar image of the storm making landfall on the Florida Panhandle

In advance of the storm, the National Hurricane Center issued tropical storm watches and warnings for much of the U.S. Gulf Coast. They were upgraded to a hurricane warning when the storm was predicted to reach hurricane intensity. Because that strengthening failed to occur, the hurricane warning was downgraded to a tropical storm warning shortly before landfall. Westward, the warnings for Louisiana and Mississippi were discontinued. After Tropical Storm Barry made landfall, all tropical storm warnings for the Florida Panhandle were discontinued.[1] Flood warnings were issued for parts of Leon and Wakulla counties, while a flash flood watch was in effect for parts of southern Georgia.[11] A tornado watch was issued for the eastern Florida Panhandle, southern Georgia, as well as portions of central and eastern Alabama.[12]

As Barry approached the Florida Panhandle, voluntary evacuations took place in eight counties.[13] Shelters opened in six counties, though most were placed on standby. In parts of Franklin County, mandatory evacuations were ordered, and in Okaloosa County, tolls on the Mid-Bay Bridge were suspended.[14] Forty C-130 cargo aircraft and about 300 personnel from Hurlburt Field were moved to the Little Rock Air Force Base in Arkansas to flee the storm's projected path. In Tallahassee, county officials filled sandbags in areas vulnerable to flooding.[13] At Grand Isle State Park, park rangers moved picnic tables out of tidal range and closed the camping grounds for a period of time.[15] Additionally, the storm forced NASA to delay a shuttle launch in southern Florida. Elsewhere, thousands of personnel were evacuated from several offshore oil platforms.[16] The city of New Orleans closed 60 of its 72 floodgates to avoid possible flooding.[17] Throughout southeastern Louisiana, including New Orleans, roughly 500 Red Cross volunteers and staff members were on standby.[16] The threat of the storm forced the cancellation of an 'N Sync concert at Pro Player Stadium.[18]

• List of Florida hurricanes
• Other storms of the same name

Wikimedia Commons has media related to Tropical Storm Barry (2001).

• Barry (2001) Tropical cyclone report
• HPC report