Hurricanes & Tropical Storms - November 2006


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.

Pacific Basin

One tropical storm and one hurricane formed in the East Pacific during November. Hurricane Sergio was a strong category 2 storm and the strongest hurricane to form or exist in November in the East North Pacific. Each of these storms is summarized below.


TS Rosa
Tropical Storm Rosa Satellite Image
Tropical Storm Rosa Track
Tropical Storm Rosa Track map

Safir Simpson Color Legend for Track Map
Saffir-Simpson Scale Color Legend
On the 6th, a tropical low formed off the Central American coast. Rosa became the first tropical cyclone to develop in November since the 2002 season. By the 9th, the storm strengthened and became a weak tropical storm, yet weakened back into a depression later that same day. At the peak of the storm, winds were approximately 35 kt (50 mph) and minimum central pressure was 1003 millibars (29.62 inches of mercury). The ACE value for Rosa was 0.2450 x 104 kt2. More information on Rosa is available from the NOAA National Hurricane Center.


Hurricane Sergio
Hurricane Sergio Satellite Image
Hurricane Sergio Track
Hurricane Sergio Track map

Safir Simpson Color Legend for Track Map
Saffir-Simpson Scale Color Legend
A tropical depression formed off the coast of Mexico on the 13th and quickly strengthened into a tropical storm that same day. For the first time since the 1961 season, two named storms had formed in November in the East North Pacific basin. Tropical Storm Sergio continued to organize and was upgraded to a hurricane by the 15th. Later that same day, the storm deepened and the minimum central pressure dropped to 965 millibars (28.50 inches of mercury), the strongest hurricane to form or exist in this basin in November. Maximum sustained winds were 95 kt (110 mph). Sergio's strength fluctuated over the next several days before dissipating on the 20th and becoming the longest-lasting tropical cyclone on record in the East North Pacific during November. The ACE value for Sergio was 7.7325 x 104 kt2. More information on Sergio is available from the NOAA National Hurricane Center.

Citing This Report

NOAA National Climatic Data Center, State of the Climate: Hurricanes & Tropical Storms for November 2006, published online December 2006, retrieved on October 25, 2014 from http://www.ncdc.noaa.gov/sotc/tropical-cyclones/2006/11.