Hurricanes & Tropical Storms - December 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.

West North Pacific Basin

Washi
Tropical Storm Washi Satellite Image
Washi Track
Tropical Storm Washi Forecast Track


Safir Simpson Color Legend for Track Map from Unisys
Saffir-Simpson Scale Color Legend
Tropical Cyclone Summary
Tropical Cyclone Washi(Sendong)
Cyclogenesis Date 12/14
Cyclolysis Date 12/19
Highest Saffir-Simpson Category TS
Maximum 6-hr Sustained Wind 63 mph (55 kt or 102 km/h)
Min Pressure 996 mbar
Accumulated Cyclone Energy (ACE*) Index (kt2) 3.7425 x 104
Landfall Information (date, location and sustained winds) N/A
Deaths 957
*The (ACE) Index calculations are based on preliminary data.

North Indian Basin

Thane
Tropical Storm Thane Satellite Image
Thane Track
Tropical Storm Thane Forecast Track


Safir Simpson Color Legend for Track Map from Unisys
Saffir-Simpson Scale Color Legend
Tropical Cyclone Summary
Tropical Cyclone Thane
Cyclogenesis Date 12/25
Cyclolysis Date 12/30
Highest Saffir-Simpson Category Cat 1
Maximum 6-hr Sustained Wind 92 mph (80 kt or 148 km/h)
Min Pressure 976 mbar
Accumulated Cyclone Energy (ACE*) Index (kt2) 6.6450 x 104
Landfall Information (date, location and sustained winds) 12/30 –Tamil Nadu, India (65 kt or 120 km /h)
Deaths 46
*The (ACE) Index calculations are based on preliminary data.

South Indian Basin

Benilde
Tropical Storm Benilde Satellite Image
Benilde Track
Tropical Storm Benilde Forecast Track


Safir Simpson Color Legend for Track Map from Unisys
Saffir-Simpson Scale Color Legend
Tropical Cyclone Summary
Tropical Cyclone Benilde
Cyclogenesis Date 12/28
Cyclolysis Date 01/04
Highest Saffir-Simpson Category Cat 2
Maximum 6-hr Sustained Wind 104 mph (90 kt or 167 km/h)
Min Pressure 968 mbar
Accumulated Cyclone Energy (ACE*) Index (kt2) 11.0225 x 104
Landfall Information (date, location and sustained winds) N/A
Deaths 0
*The (ACE) Index calculations are based on preliminary data.


Australian Basin

Alenga
Tropical Storm Alenga Satellite Image


Australian Scale Color Legend for Track Map from Unisys
Australian Scale Color Legend
Alenga Track
Tropical Storm Alenga Track


Safir Simpson Color Legend for Track Map from Unisys
Saffir-Simpson Scale Color Legend
Tropical Cyclone Summary
Tropical Cyclone Alenga
Cyclogenesis Date 12/05
Cyclolysis Date 12/09
Highest Australian Category Cat 2
Maximum Gust 150 km/h
Highest Saffir-Simpson Category Cat 2
Maximum 6-hr Sustained Wind 109 mph (95 kt or 176 km/h)
Min Pressure 968 mbar
Accumulated Cyclone Energy (ACE*) Index (kt2) 6.4850 x 104
Landfall Information (date, location and sustained winds) N/A
Deaths N/A
*The (ACE) Index calculations are based on preliminary data.

Grant
Tropical Storm Grant Satellite Image


Australian Scale Color Legend for Track Map from Unisys
Australian Scale Color Legend
Grant Track
Tropical Storm Grant Track


Safir Simpson Color Legend for Track Map from Unisys
Saffir-Simpson Scale Color Legend
Tropical Cyclone Summary
Tropical Cyclone Grant
Cyclogenesis Date 12/25
Cyclolysis Date 12/25
Highest Australian Category Cat 1
Maximum Gust 100 km/h
Highest Saffir-Simpson Category TS
Maximum 6-hr Sustained Wind 46 mph (40 kt or 74 km/h)
Min Pressure 978 mbar
Accumulated Cyclone Energy (ACE*) Index (kt2) 6.4850 x 104
Landfall Information (date, location and sustained winds) 12/25–Northern Territory (40 kt or 74 km /h)
Deaths N/A
*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 December 2011, published online January 2012, retrieved on November 24, 2014 from http://www.ncdc.noaa.gov/sotc/tropical-cyclones/2011/12.