Hurricane Humberto (2007)

Last updated
Map key
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
Disc Plain black.svg Tropical cyclone
Solid black.svg Subtropical cyclone
ArrowUp.svg Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

The origins of Humberto can be traced to the remnants of a frontal trough—the same one that spawned Tropical Storm Gabrielle—that moved offshore of south Florida on September 5. [1] [2] The combination of a weak surface trough and an upper-level low pressure system produced disorganized showers and thunderstorms from western Cuba into the eastern Gulf of Mexico. [3] Tracking slowly west-northwestward, unfavorable wind shear initially inhibited tropical cyclone development. [4]

By late on September 11, environmental conditions became more favorable, [5] and the following morning convection increased over the disturbance. [6] Tracking around the western periphery of a mid-level ridge, the system turned on a slow northwest drift and quickly organized. Radar imagery reported loose banding features, and buoy data indicated the presence of a surface circulation; based on the observations, the National Hurricane Center classified the system as Tropical Depression Nine, while located roughly 60 miles (97 km) southeast of Matagorda, Texas. [7]

Upon becoming a tropical cyclone, the tropical depression was forecast to strengthen slowly to reach peak winds of 45 mph (72 km/h). [7] Within three hours of forming, the depression intensified into Tropical Storm Humberto. [8] A small cyclone, the storm continued to organize quickly as it turned north-northeastward, while radar imagery suggested the formation of an eye by early on September 13. [9] Based on reports from Hurricane Hunters, Humberto was upgraded to a hurricane at 0515  UTC on September 13, while located about 15 miles (24 km) off the coast of Texas. [10] The hurricane made landfall a few miles to the east of High Island at around 0700 UTC. A well-defined eye was maintained with strong convection around it, and Hurricane Hunters reported sustained winds of 85 mph (137 km/h) about two hours after landfall. [11] However, post-storm analysis later determined that the winds were a bit stronger—about 90 mph (140 km/h). [2]

Based on operational estimates of a wind speed increase of 50 mph (80 km/h), the National Hurricane Center reported that "no tropical cyclone in the historic record has ever reached this intensity at a faster rate near landfall." The path of the eye continued northeastward and passed over Port Arthur, Nederland, Port Neches, Groves, and Bridge City, Texas at Category 1 hurricane strength. This was the second time within two years (following Hurricane Rita on September 24, 2005) that these cities experienced a direct hit from a hurricane.

By eight hours after landfall, Humberto weakened to a tropical storm as it crossed into southwestern Louisiana. [12] Increased upper-level wind shear caused the storm to weaken rapidly over land, and late on September 13 Humberto weakened to a tropical depression. Upon issuing its last advisory, the National Hurricane Center remarked on the potential for the remnants of the storm to turn southward into the Gulf of Mexico. [13] However, the storm continued northeastward through the southeastern United States, and on September 14, the storm began dissipating over northwestern Georgia, and shortly thereafter degenerated into a remnant low pressure area. [14]

Preparations

Radar image of Hurricane Humberto at Texas landfall Humbertoradar913.png
Radar image of Hurricane Humberto at Texas landfall

Upon becoming a tropical cyclone, a tropical storm warning was issued from Port O'Connor, Texas, to Cameron, Louisiana, and a tropical storm watch was posted from Cameron to Intracoastal City, Louisiana; [15] after Humberto became a tropical storm, the watch was upgraded to a warning. [16] Upon reaching hurricane status, the National Hurricane Center issued a hurricane warning from High Island, Texas, to Cameron, Louisiana. [17] An inland tropical storm warning was declared for several parishes in southwestern Louisiana. [18] The National Weather Service Storm Prediction Center posted a tornado watch for southwestern coastal parishes. [12]

Prior to moving ashore, officials in Calcasieu Parish, Louisiana, advised residents in low-lying or flood-prone areas to consider moving to a safer location. A shelter was opened in Lake Charles, [18] where 29 people stayed during the storm. [19] Flood watches and warnings were issued for portions of Mississippi and Louisiana as the storm tracked across the region. [20] Texas Governor Rick Perry, prepared state resources for the potentially impacted areas, including the deployment of 200 Texas Military Forces soldiers and six Black Hawk helicopters and two water rescue teams for search and rescue missions. The Texas State Operations Center was activated shortly after the cyclone developed. [21]

Impact

Texas

Fallen trees like this one caused many power outages in Southeast Texas Hurricane Humberto 2007 tree damage.jpg
Fallen trees like this one caused many power outages in Southeast Texas

A few hours prior to its development, outer rainbands from the depression began moving over portions of the Texas coast. [6] Heavy rainfall from intense thunderstorms caused minor flooding as they crossed the coastline during the subsequent days; [22] precipitation in the state peaked at 14.13 inches (359 mm) at East Bay Bayou, the highest recorded rainfall total in association with the hurricane. [14] Sustained winds peaked at 69 mph (111 km/h) with gusts to 85 mph (137 km/h) at Sea Rim State Park; the National Weather Service estimates gusts exceeded 90 mph (140 km/h) in southwestern Jefferson County and extreme southeastern Chambers County. [23] In the Golden Pass Ship Channel, an unofficial report of a 115 mph (185 km/h) wind gust was relayed to the National Hurricane Center. [2] Upon moving ashore, Humberto produced a minor storm surge in the state, peaking at 2.86 feet (0.87 m) at Rollover Pass; the combination of surge and waves resulted in light beach erosion. [22]

Hurricane Humberto left 10 homes completely destroyed in Galveston County, with an additional 19 severely damaged in the county; several homes received minor shingle damage, and road closures left about 5,000 houses isolated in the county. The combination of saturated grounds and strong winds uprooted many trees and downed power lines across the path of the hurricane, [22] with at least 50 high voltage transmission poles blown down or seriously damaged; over 120,000 power customers in Orange and Jefferson counties lost power, [19] with 118,000  Entergy customers in the state without electricity. [24] Widespread flooding occurred in Jefferson and Orange counties, and at least 20 homes in Beaumont were flooded. Additionally, several roadways were flooded. The passage of the hurricane caused one fatality in the state; a Bridge City man was killed when his carport crashed on him outside his house. [19] Initially, press reports indicated that the storm wrought up to $500 million in damage; [25] however, final damage estimates were about $50 million. [2]

Oil production was slowed as a result of Humberto, as at least four refineries—the Valero, ExxonMobil, TotalEnergies and Motiva Enterprises LLC plants in Port Arthur—were halted due to the loss of power. Oil prices rose above $80 a barrel in intraday trading on September 12 as a result, ending the next day at a record high of $80.09 a barrel. [26] [27] Natural gas futures rose 8 percent ahead of the storm, but lost most of those gains the next day. [27]

According to the Federal Emergency Management Agency (FEMA), 1,464 residences throughout Texas were affected by Hurricane Humberto. Of these, 25 were destroyed, 96 sustained major damage and 240 sustained minor damage. The cost of individual assistance for those impacted by Humberto would cost $4,776,334; the cost of debris removal and other public assistance amounted to $6,682,074. In terms of per capita income, Jefferson County sustained the most impact, decreasing by $22.38. [28]

Louisiana

Humberto's rainfall Humberto 2007 rainfall.gif
Humberto's rainfall

Tracking through the state as a weakening tropical storm, Humberto produced light to moderate winds across southwestern Louisiana. Gusts officially peaked at 43 mph (69 km/h) in the state, although an unofficial reading of 55 mph (89 km/h) was reported in Vinton. [23] Heavy rainfall occurred across the area, reaching a peak of 8.25 inches (210 mm) in DeRidder. [29] The rainfall triggered minor river flooding along the Vermilion River in Lafayette. Storm surge was minor in the state, peaking at 2.13 feet (0.65 m) in Cypremont Point; [2] no beach erosion was reported. [19]

Widespread freshwater flooding occurred in Beauregard Parish, leaving homes in DeRidder flooded. High water across the southwestern portion of the state resulted in the closure of several roadways, including U.S. Route 171 and various state highways. Isolated wind damage was reported, particularly near the Texas border, with some trees and power lines blown down. A total of about 13,000 power customers lost electricity in southwestern Louisiana. [19] One EF1 tornado briefly touched down in Vermilion Parish, blowing the roof off one home and downing trees and power lines. [30] Damage throughout Louisiana was estimated at $525,000. [31]

Southeast United States

After the circulation dissipated, the remnants of Humberto brought moderate rainfall to the southeastern states and spawned several tornadoes across portions of South Carolina and North Carolina and caused widespread damage in some locations. [32] Heavy rains in Mississippi led to flooding in low-lying areas. In Hinds County, a small rail bridge was washed out, forcing all Amtrak train passengers to take a bus to their destinations. [33] One person was injured after driving his car into a flood. [34] In Alabama, rainfall up to 5.06 in (129 mm) caused minor ponding in low-lying areas but aided in short-term drought relief. [35] In northern Georgia, locally heavy rainfall led to flash flooding, resulting in several road closures. [36] Strong thunderstorms associated with the remnants of Humberto also produced winds up to 51 mph (82 km/h) and penny-sized hail. [37] Throughout North Carolina, seven EF0 tornadoes were confirmed [38] , resulting in minor damage to homes, though none caused injuries or fatalities. [39] Heavy rains associated with the system also triggered flash flooding along some roads, resulting in their closure. [40] In South Carolina, one EF1 tornado touched down in Laurens County, causing moderate damage to several homes before lifting. [41]

Aftermath

Residents lining up at a damaged gas station for fuel and supplies in the wake of Humberto Residents at stations after Hurricane Humberto 2007.jpg
Residents lining up at a damaged gas station for fuel and supplies in the wake of Humberto

Hours after Humberto made landfall, Rick Perry declared Galveston, Jefferson, and Orange counties as disaster areas, which allocated state resources to assist the affected residents. [21] The governor applied for a presidential disaster declaration on September 21. [42] Four Federal Emergency Management Agency (FEMA) teams assessed the hurricane damage in the three most affected counties. [43] Following their assessment, they determined that the damage caused by Humberto was not significant enough to require a disaster declaration. As such, Governor Rick Perry's request from FEMA was denied. [44] Across the Bolivar Peninsula, an estimated 1,500 cubic yards of structural debris and 3,000 cubic yards of tree limbs were needed to be removed in the wake of the storm. [45]

See also

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References

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Hurricane Humberto
HU Humberto Sep 13 2007 AQUA MODIS.png
Hurricane Humberto at peak intensity while making landfall in Texas, early on September 13