USA Climate Overview: Nov. 2010

From NOAA’s National Climatic Data Center (NCDC)

U.S. Climate at a Glance
Credit: NCDC Climate Services & Monitoring Division of NOAA

Temperature Highlights

  • November temperatures, when averaged across the contiguous United States, were near-normal, 0.8 ??F (0.4?? ??C) above the 1901-2000 average. The combined average temperatures for the fall season (September-November) was 1.5 ??F (0.8 ??C) above normal.
  • Warmer-than-normal conditions were scattered about the Great Lakes region and a portion of the Northeast. Cooler-than-normal conditions existed for a subset of states in the western half of the U.S.
  • For the fall season (September-November), warmer-than-normal temperatures were predominant throughout much of the country. These conditions were mostly reflective from the above-average warmth during September and October.
  • The Northeast climate region has experienced persistent warmth through the entire year, resulting in its warmest January-November period on record.
  • Six states (New Hampshire, Vermont, Massachusetts, Rhode Island, Connecticut and New Jersey) had their warmest year-to-date period on record.
  • Based on monthly temperatures averaged from January-November, Florida is the only state in the contiguous United States to experience a temperature that ranked below-normal.

Precipitation Highlights

  • The average precipitation was 2.02 inches (51.3 mm), 0.1 inch (2.54 mm) below the 1901-2000 average. With most of the climate regions near-normal, the above-average precipitation in the West North Central and Central climate regions offset the below-average precipitation in the Southwest resulting in a near normal month for the contiguous U.S. Montana had its seventh wettest November on record.
  • Precipitation, when averaged across the U.S. for the fall period was near normal. However several states experienced precipitation that ranked among their wettest/driest ten percent. Both Maine and Minnesota had their sixth wettest period and it was the seventh wettest for Nevada and the ninth wettest for North Dakota. Meanwhile, the persistent lack of precipitation in Florida resulted in its second driest fall period on record.
  • For the year-to-date period, the persistent storm track over the upper Midwest resulted in much-above-normal precipitation in Wisconsin, Minnesota, Iowa, North Dakota and South Dakota. Meanwhile, the Bermuda high situated in the western North Atlantic this past summer acted as a blocking pattern. This led to below-average precipitation for the Southeast climate region.

    Other Items of Note

  • There were 57 preliminary tornado reports during November. This is near the long-term average, but marks the most tornado activity during November since 2005. Rare November tornadoes were reported in Wisconsin, Illinois, and New York ??? tornadoes are unusual this far north, this late in the year.
  • Drought coverage continued to increased during November. The U.S. Drought Monitor reported 16.7 percent of the United States was affected by drought by November 30th. While improvements were seen across the Ohio River Valley, drought conditions deteriorated during the month in Florida, south Texas, and parts of southeast Colorado.

Excerpted from: NOAA, National Climatic Data Center, State of the Climate: National Overview for November 2010, published online December 2010, retrieved from www.ncdc.noaa.gov/sotc/national/2010/11.

About NCDC

NCDC, The USA’s National Climatic Data Center, a unit of NOAA, is the world’s largest active archive of weather data. NCDC produces numerous climate publications and responds to data requests from all over the world. NCDC operates the World Data Center for Meteorology that is co-located at NCDC in Asheville, North Carolina, and the World Data Center for Paleoclimatology that is located in Boulder, Colorado. NCDC supports a three tier national climate services support program – the partners include: NCDC, Regional Climate Centers, and State Climatologists.

NOAA, the National Oceanic and Atmospheric Administration, is an agency of the US Government. Learn more about NOAA at: www.noaa.gov