Department of Commerce

National Oceanic and Atmospheric Administration

Climate of 2000 - November
U.S. Regional and Statewide Analyses

Includes Year-to-Date Summary

National Climatic Data Center, 19 December 2000
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Standard Regions for Temperature and Precipitation
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Contents of This Report:

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Through climate analysis, National Climatic Data Center scientists have identified nine climatically consistent regions within the contiguous United States which are useful for putting current climate anomalies into an historical perspective.

Additional information about current climate anomalies can be found at the respective Web Pages of the Southern Regional Climate Center, Western Regional Climate Center, Midwest Regional Climate Center, Southeast Regional Climate Center, High Plains Regional Climate Center, and the Northeast Regional Climate Center.

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Top of Page November 2000 Statewide Ranks

November Tmp Map
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November 2000 was the second coolest such month on record for Arizona, Idaho, Utah, and Wyoming and the third coolest such month since 1895 for California, Colorado, and Nebraska. Nine other states ranked within the top ten cool portion of the distribution.

A total of 30 states ranked within the cool third portion of the distribution.

Only two states, Maine and New Hampshire, ranked within the warm third portion of the historical distribution for November 2000.

It was the second wettest November on record for Louisiana, third wettest for Texas, and the fourth wettest November since 1895 for North Dakota. Five other states ranked within the top ten wet portion of the distribution while a total of 15 states ranked within the wet third portion of the distribution.

No state ranked within the top ten dry portion of the distribution while 13 ranked within the dry third.

Nov Pcp Map
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Top of Page November Regional Highlights

Based upon preliminary data, November 2000 was the coolest such month since 1895 for the Southwest region. This is in sharp contrast to November 1999, the second warmest such month on record. The last five such months have been above to much above the long term mean. Cool Region Nov
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Wet Region Nov
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It was the wettest November on record for the South region. Just last year, November was the fourth driest such month on record.
November 2000 was the 11th driest such month since 1895 for the West region. Eight of the last twelve such months have been much below the long-term mean. Dry Region Nov
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Agricultural Belt Pcp
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Preliminary data indicate that precipitation for the growing season-to-date, October-November 2000, averaged much above the long-term mean as the fifth wettest such period on record for the Primary Hard Red Winter Wheat Belt. The wettest such two-month period was just two years ago.
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Top of Page January-November 2000 Statewide Ranks

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Thirty-six states ranked within the warm third portion of the historical distribution for January-November 2000 while 13 states ranked within the top ten warm including
  • New Mexico - second warmest
  • Utah - second warmest
  • Nevada - third warmest
  • Colorado - fourth warmest
  • Texas - fourth warmest

No state ranked within the cool third of the historical distribution.

January-November 2000 was the driest such period on record for Florida and the ninth driest for Alabama and Georgia. Nine other states ranked within the dry third portion of the distribution.

It was the seventh wettest January-November on record for New York and North Dakota. Sixteen other states ranked within the wet third portion of the distribution.

Jan-Nov Pcp Map
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Top of Page January-November Regional Highlights

Warm Region 1-11
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Preliminary data indicate that January-November 2000 was the second warmest such period since 1895 for the Southwest region. The last seven such eleven-month periods have been much above the long-term mean.

Preliminary data indicate that the year-to-date, January-November 2000, was the 25th wettest such period on record for the Northeast region. Five of the last seven such periods have been much wetter than the long-term mean in this region. Wet Region Jan-Nov
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Dry Region 1-11
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Preliminary data indicate that January-November 2000 was the eighth driest such period since 1895 for the Southeast region. Four of the last twelve such periods have been below to much below the long-term mean.
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Current and historical drought information can be found at the U.S. Drought page. Additional drought information can also be found at the Web Page for the National Drought Mitigation Center. The Center monitors current droughts both in the United States and worldwide.

Damage due to the drought has been summarized by NOAA and the Office of Global Programs in the Climatological Impacts section of the Climate Information Project. Crop impact information can be found at the USDA NASS (National Agricultural Statistics Service) and Weekly Weather and Crop Bulletin pages. Drought statements by local National Weather Service Offices can be found at the NWS Hydrologic Information Center. Drought threat assessments and other information can be found at NOAA's Drought Information Center.

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Top of Page November Precipitation and Temperature Ranks, Extremes and Normals

Table 1 shows precipitation and temperature ranks for each of the 9 regions and the nation for November 2000, the two-month period of October-November 2000, the six months of June-November 2000, and the past 12 months, December 1999-November 2000.
                     PRECIPITATION AND TEMPERATURE RANKS, BASED
                     ON THE PERIOD 1895-2000.  1 = DRIEST/COLDEST,
                     106 = WETTEST/WARMEST FOR NOVEMBER 2000,
                     106 = WETTEST/WARMEST FOR OCT-NOV 2000,
                     106 = WETTEST/WARMEST FOR JUN-NOV 2000,
                     105 = WETTEST/WARMEST FOR DEC 1999-NOV 2000.

                                NOV    OCT-NOV    JUN-NOV   DEC 1999-
            REGION              2000     2000       2000    NOV 2000
            ------              ----  ---------  ---------  ---------

                      PRECIPITATION:

           NORTHEAST             30       17         34         71
           EAST NORTH CENTRAL    89       62         72         63
           CENTRAL               51       25         55         42

           SOUTHEAST             81       22         21          5
           WEST NORTH CENTRAL    90       99         47         45
           SOUTH                106      102         54         41

           SOUTHWEST             71      105         69         42
           NORTHWEST             13       18         19         31
           WEST                  11       48         43         46

           NATIONAL              81       78         42         26

                      TEMPERATURE:

           NORTHEAST             54       54         22         80
           EAST NORTH CENTRAL    45       70         58        100
           CENTRAL               28       56         36         89

           SOUTHEAST             36       27         35         68
           WEST NORTH CENTRAL     6       14         53        101
           SOUTH                  8       32         71        101

           SOUTHWEST              1        3         74        103
           NORTHWEST              5        9         43         89
           WEST                   3       20         72         97

           NATIONAL*              2       17         67        103

           *National Temperature Rank Based on a combination of
            USHCN and divisional data.

It should be emphasized that all of the temperature and precipitation ranks and values in Tables 1 through 5 are based on preliminary data. The ranks will change when the final data are processed.


Top of Page Table 2 shows historical extremes for November, the 1961-1990 normal, and the November 2000 value for each of the 9 regions and the contiguous U.S. for precipitation and temperature. It should be noted that the 2000 values will change when the final data are processed.
                                        PRECIPITATION (INCHES)
                                   DRIEST     WETTEST   NORMAL  2000
               REGION            VALUE YEAR VALUE YEAR   PCPN   PCPN
               ------            ---------- ----------  ------ ------

              NORTHEAST           0.88 1917  6.34 1983   3.84   2.64
              EAST NORTH CENTRAL  0.20 1904  4.03 1931   1.89   2.47
              CENTRAL             0.71 1904  7.71 1985   3.53   2.98

              SOUTHEAST           0.83 1931  8.39 1948   3.30   3.69
              WEST NORTH CENTRAL  0.06 1939  1.63 1896   0.74   1.07
              SOUTH               0.20 1949  5.34 2000   2.63   5.34

              SOUTHWEST           0.06 1904  2.37 1905   0.90   0.88
              NORTHWEST           0.30 1936  7.61 1909   3.78   1.76
              WEST                0.01 1929  5.56 1926   2.22   0.55

              NATIONAL            0.88 1917  3.76 1983   2.32   2.52*

                                  * PRELIMINARY VALUE, CONFIDENCE
                                    INTERVAL + OR - 0.20 INCHES

                                     TEMPERATURE (DEGREES F)
                                   COLDEST    WARMEST   NORMAL  2000
               REGION            VALUE YEAR VALUE YEAR   TEMP   TEMP
               ------            ---------- ----------  ------ ------

              NORTHEAST           32.3 1901  44.7 1931   38.7   38.3
              EAST NORTH CENTRAL  24.9 1959  40.6 1999   33.1   32.1
              CENTRAL             35.9 1976  51.4 1931   44.2   41.3

              SOUTHEAST           48.2 1976  62.4 1985   55.0   52.9
              WEST NORTH CENTRAL  17.3 1985  40.4 1999   30.9   23.9
              SOUTH               45.5 1976  58.7 1909   52.5   48.5

              SOUTHWEST           35.6 2000  46.9 1949   41.4   35.6
              NORTHWEST           27.2 1985  42.8 1899   37.0   32.1
              WEST                40.0 1994  51.8 1949   46.0   42.0

              NATIONAL*           38.1 1911  48.4 1999   42.5   38.7

              *National Temperature Rank Based on a combination of
               USHCN and divisional data.
 
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Top of Page January-November Precipitation and Temperature Ranks, Extremes and Normals

Table 3 shows precipitation and temperature ranks for each of the 9 regions and the nation for January-November 2000. Based on the period 1895-2000.

1 = DRIEST/COLDEST, 106 = WETTEST/HOTTEST
               REGION                PRECIPITATION  TEMPERATURE
               ------                -------------  -----------

              NORTHEAST                   82             71
              EAST NORTH CENTRAL          68            101
              CENTRAL                     48             83

              SOUTHEAST                    8             66
              WEST NORTH CENTRAL          48             97
              SOUTH                       42            101

              SOUTHWEST                   49            105
              NORTHWEST                   37             88
              WEST                        71             99

              NATIONAL                    30            103

              *National Temperature Rank Based on a combination of
               USHCN and divisional data.


Top of Page Table 4 shows historical extremes for January-November, the 1961-1990 normal, and the January-November 2000 value for each of the 9 regions and the contiguous U.S. for precipitation and temperature. It should be noted that the 2000 values will change when the final data are processed.
                                         PRECIPITATION (INCHES)
                                   DRIEST     WETTEST   NORMAL  2000
               REGION            VALUE YEAR VALUE YEAR   PCPN   PCPN
               ------            ---------- ----------  ------ ------

              NORTHEAST          29.53 1941 48.24 1996  38.18  39.84
              EAST NORTH CENTRAL 19.03 1910 35.01 1951  29.06  29.65
              CENTRAL            28.89 1901 48.60 1950  39.61  38.61

              SOUTHEAST          34.32 1954 59.24 1929  47.16  38.95
              WEST NORTH CENTRAL 10.91 1934 22.15 1915  16.27  16.00
              SOUTH              22.14 1956 44.31 1957  33.23  31.01

              SOUTHWEST           7.31 1956 20.88 1941  12.68  12.36
              NORTHWEST          13.75 1929 30.87 1983  23.47  21.70
              WEST                7.94 1929 26.48 1983  14.18  15.56

              NATIONAL           22.54 1910 31.05 1973  27.16  25.88

                                     TEMPERATURE (DEGREES F)
                                   COLDEST    WARMEST   NORMAL  2000
               REGION            VALUE YEAR VALUE YEAR   TEMP   TEMP
               ------            ---------- ----------  ------ ------

              NORTHEAST           45.3 1904  50.8 1998   47.8   48.5
              EAST NORTH CENTRAL  42.2 1917  49.8 1931   45.8   48.0
              CENTRAL             52.9 1979  58.8 1921   55.1   56.6

              SOUTHEAST           62.2 1940  66.3 1921   63.8   64.6
              WEST NORTH CENTRAL  42.1 1950  49.1 1934   45.5   47.4
              SOUTH               61.9 1979  66.4 1921   63.7   66.0

              SOUTHWEST           51.2 1917  56.4 1934   53.6   56.1
              NORTHWEST           45.4 1955  52.0 1934   48.3   49.2
              WEST                54.6 1912  59.4 1934   56.5   58.1

              NATIONAL            52.6 1912  56.9 1934   54.5   56.3

              *National Temperature Rank Based on a combination of
               USHCN and divisional data.
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Top of Page Water Year River Basin Statistics, October-November 2000

Table 5 shows statistics for selected river basins: Precipitation rankings are for October-November 2000, where 1 = driest, and 106 = wettest, based on the period 1895 to 2000. Also shown is the areal percent of the basin experiencing severe or extreme long-term (Palmer) drought, and areal percent of the basin experiencing severe or extreme long-term (Palmer) wet conditions, as of November 2000.

                                        PRECIPITATION  % AREA  % AREA
          RIVER BASIN                       RANK        DRY     WET
          -----------                   -------------  ------  ------

          MISSOURI BASIN                     95         21.1%   11.4%
          PACIFIC NORTHWEST BASIN            19         10.9%    0.0%
          CALIFORNIA RIVER BASIN             43          0.0%    0.0%

          GREAT BASIN                        90          0.0%    0.0%
          UPPER COLORADO BASIN               76          0.0%    0.0%
          LOWER COLORADO BASIN              103          0.0%   18.3%
          RIO GRANDE BASIN                  105          1.6%    7.3%

          ARKANSAS-WHITE-RED BASIN          100          0.0%    0.0%
          TEXAS GULF COAST BASIN             99          0.0%    0.0%
          SOURIS-RED-RAINY BASIN            102          0.0%   88.6%
          UPPER MISSISSIPPI BASIN            57          0.0%    1.3%

          LOWER MISSISSIPPI BASIN            91          0.0%    0.0%
          GREAT LAKES BASIN                  28         16.2%   10.9%
          OHIO RIVER BASIN                   16          0.0%    7.6%
          TENNESSEE RIVER BASIN              31          0.0%    0.0%

          NEW ENGLAND BASIN                  37          0.0%    7.7%
          MID-ATLANTIC BASIN                  7          0.0%    0.0%
          SOUTH ATLANTIC-GULF BASIN          46         22.0%    0.0%

The river basin regions are defined by the U.S. Water Resources Council.

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For more information, refer to ...

References:

Thomas R. Karl and Albert J. Koscielny, 1982: "Drought in the United States: 1895-1981." Journal of Climatology, vol. 2, pp. 313-329.

Thomas R. Karl and Walter James Koss, 1984: "Regional and National Monthly, Seasonal, and Annual Temperature Weighted by Area, 1895-1983." Historical Climatology Series 4-3, National Climatic Data Center, Asheville, NC, 38 pp.

NOAA's National Climatic Data Center is the world's largest active archive of weather data. The preliminary temperature and precipitation rankings are available from the center by calling: 828-271-4800.

Historical precipitation and temperature ranking maps are also available on the Internet courtesy of the Climate Prediction Center.

NOAA works closely with the academic and scientific communities on climate-related research projects to increase the understanding of El Niño and improve forecasting techniques. NOAA's Climate Prediction Center monitors, analyzes and predicts climate events ranging from weeks to seasons for the nation. NOAA also operates the network of data buoys and satellites that provide vital information about the ocean waters, and initiates research projects to improve future climate forecasts. The long lead climate outlooks are available from the Climate Prediction Center.

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For all climate questions other than questions concerning this report, please contact the National Climatic Data Center's Climate Services Division:

Climate Services Division
NOAA/National Climatic Data Center
151 Patton Avenue
Asheville, NC 28801-5001
fax: 828-271-4876
phone: 828-271-4800
email: ncdc.info@noaa.gov
For further information on the historical climate perspective presented in this report, contact:

William Brown
NOAA/National Climatic Data Center
151 Patton Avenue
Asheville, NC 28801-5001
fax: 828-271-4328
email: william.brown@noaa.gov

-or-

Jay Lawrimore
NOAA/National Climatic Data Center
151 Patton Avenue
Asheville, NC 28801-5001
fax: 828-271-4328
email: jay.lawrimore@noaa.gov
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