Hurricanes & Tropical Storms - November 2011


NCDC transitioned to the nClimDiv dataset on Thursday, March 13, 2014. This was coincident with the release of the February 2014 monthly monitoring report. For details on this transition, please visit our public FTP site and our U.S. Climate Divisional Database site.


Note: This report catalogs recent tropical cyclones and places each basin's tropical cyclone activity in a climate-scale context. It is not updated in real time. Users seeking real time status and forecasts of tropical cyclones should visit The National Hurricane Center.

North Indian Basin

Keila
Tropical Storm Keila Satellite Image
Keila Track
Tropical Storm Keila Forecast Track


Safir Simpson Color Legend for Track Map from Unisys
Saffir-Simpson Scale Color Legend
Tropical Cyclone Summary
Tropical Cyclone Keila
Cyclogenesis Date 11/02
Cyclolysis Date 11/02
Highest Saffir-Simpson Category TS
Maximum 6-hr Sustained Wind 40 mph (35 kt or 65 km/h)
Min Pressure 996 mbar
Accumulated Cyclone Energy (ACE*) Index (kt2) .3675 x 104
Landfall Information (date, location and sustained winds) N/A
Deaths 14
*The (ACE) Index calculations are based on preliminary data.

Five
Tropical Storm Five Satellite Image
Five Track
Tropical Storm Five Forecast Track


Safir Simpson Color Legend for Track Map from Unisys
Saffir-Simpson Scale Color Legend
Tropical Cyclone Summary
Tropical Cyclone Five
Cyclogenesis Date 11/26
Cyclolysis Date 11/30
Highest Saffir-Simpson Category TS
Maximum 6-hr Sustained Wind 40 mph (35 kt or 65 km/h)
Min Pressure 998 mbar
Accumulated Cyclone Energy (ACE*) Index (kt2) 1.8375 x 104
Landfall Information (date, location and sustained winds) N/A
Deaths 19
*The (ACE) Index calculations are based on preliminary data.

Atlantic Basin

During the first week of November, an extratropical low pressure system departed the coast of South Carolina and settled several hundred miles southwest of Bermuda. On November 8, the disturbance attained gale-force winds of 45 mph (75 km/h); however, due to the presence of a cold core, the cyclone was named Subtropical Storm Sean. Upon disassociating from its parent upper-level low, the storm was declared fully tropical hours later. Tracking northeast, its center passed within 80 miles (180 km) of Bermuda, then continued out to sea. By November 12, the storm had transitioned to extratropical and was absorbed by a cold front in the northern Atlantic. Overall storm impacts included precipitation amounts of less than 1 inch (25.4 mm) in Bermuda as well as one storm surge-related drowning near Florida’s east coast. On average, a named storm forms in the Atlantic basin in November once every other year.

Sean
Tropical Storm Sean Satellite Image
Sean Track
Tropical Storm Sean Forecast Track


Safir Simpson Color Legend for Track Map from Unisys
Saffir-Simpson Scale Color Legend
Tropical Cyclone Summary
Tropical Cyclone Sean
Cyclogenesis Date 11/08
Cyclolysis Date 11/12
Highest Saffir-Simpson Category TS
Maximum 6-hr Sustained Wind 63 mph (55 kt or 102 km/h)
Min Pressure 983 mbar
Accumulated Cyclone Energy (ACE*) Index (kt2) 3.7225 x 104
Landfall Information (date, location and sustained winds) N/A
Deaths 0
*The (ACE) Index calculations are based on preliminary data.


East North Pacific Basin

A rarity, both for its late-season (November 1 or later) occurrence and its affiliation with wave-like motions other than African tropical waves, Kenneth formed as a tropical depression on November 18. Benefiting from unseasonably low wind shear and unseasonably warm ocean temperatures of 27 degrees C (80.6 degrees F), the storm rapidly intensified to a Category 1 and Category 2 hurricane on November 21. Near dawn on the following day, Kenneth became a Category 4 hurricane with winds of 145 mph (230 km/h) – its peak intensity. As it traversed colder waters, the storm downgraded to tropical storm strength less than 24 hours later. It tracked westward out to sea for the length of its lifespan posing no threat to land areas. By November 25, Kenneth weakened to a remnant low and was later absorbed by a stationary system near the eastern border of the Central Pacific. On average, a hurricane forms during November in the Eastern Pacific basin once every 10 years. Kenneth is not only the latest occurring major hurricane since the start of the satellite era (1971), but also the strongest late-season tropical cyclone on record in the Eastern Pacific.

Kenneth
Tropical Storm Kenneth Satellite Image
Kenneth Track
Tropical Storm Kenneth Forecast Track


Safir Simpson Color Legend for Track Map from Unisys
Saffir-Simpson Scale Color Legend
Tropical Cyclone Summary
Tropical Cyclone Kenneth
Cyclogenesis Date 11/20
Cyclolysis Date 11/25
Highest Saffir-Simpson Category Cat 4
Maximum 6-hr Sustained Wind 144 mph (125 kt or 232 km/h)
Min Pressure 943 mbar
Accumulated Cyclone Energy (ACE*) Index (kt2) 11.0225 x 104
Landfall Information (date, location and sustained winds)
Deaths 0
*The (ACE) Index calculations are based on preliminary data.

Citing This Report

NOAA National Climatic Data Center, State of the Climate: Hurricanes & Tropical Storms for November 2011, published online December 2011, retrieved on July 29, 2014 from http://www.ncdc.noaa.gov/sotc/tropical-cyclones/2011/11.