National Weather Service United States Department of Commerce

Storms in the Plains; Heat Wave to Begin in the Northern Tier

A slow moving weather system will bring potential for scattered strong to severe storms with damaging wind and hail with areas of locally heavy rain in the South and Central Plains through Monday. A heat wave is expected to begin across the Northern Plains, Upper Midwest, and northern Great Basin with temperatures reaching over 20 degrees above normal in some areas. Read More >

                                  TRI-CITIES TN
                            DAILY NORMALS AND RECORDS
                                    SEPTEMBER

      MAX   MIN   AVG   HDD   CDD    PCPN    REC HIGH     REC LOW     REC PCPN

 1     85    61    73     0     8    0.10    98  1953    47  1999    1.80 1982
 2     84    61    72     0     8    0.10    96  1943    45  1967    2.87 1978
 3     84    60    72     0     7    0.09    96  2011    45  1967    2.02 1941
 4     84    60    72     0     7    0.10    99  1954    44  1997    1.47 1981
 5     84    60    72     0     7    0.09    99  1954    41  1997    2.23 2011

 6     84    60    72     0     7    0.09   100  1954    47  1997    1.10 1947
 7     83    59    71     0     7    0.08   100  1954    45  2017    1.06 1987
 8     83    59    71     0     6    0.09    92  2002    44  2017    0.89 2004
 9     83    59    71     0     6    0.09    95  1954    43  1998    1.49 2008
 10    83    59    70     0     6    0.09    96  2019    42  1998    1.69 1946

 11    82    58    70     0     6    0.09    93  2019    42  1993    1.15 1989
 12    82    58    70     0     5    0.10    94  2019    42  1993    1.10 1950
 13    82    58    70     1     5    0.10    96  2019    38  1940    1.83 1947
 14    81    57    69     1     5    0.10    97  1998    41  1985    3.15 1982
 15    81    57    69     1     5    0.10    92  2016    40  1985    1.93 1981

 16    81    57    69     1     5    0.10    92  2019    42  2001    2.31 1962
 17    81    56    68     1     4    0.10    92  1954    37  2000    2.37 2004
 18    80    56    68     1     4    0.09    93  1954    39  1943    2.00 2012
 19    80    55    68     1     4    0.10    92  1954    41  1984    1.12 1953
 20    80    55    67     1     4    0.09    91  1965    42  1981    1.45 1957

 21    79    55    67     2     4    0.09    93  1955    39  2006    1.00 1974
 22    79    54    66     2     3    0.10    90  2007    39  1983    1.26 1975
 23    79    54    66     2     3    0.09    94  1955    35  1999    0.81 1975
 24    78    54    66     2     3    0.10    92  2007    34  1983    0.81 1965
 25    78    53    65     2     3    0.09    91  2007    38  1950    1.38 1989

 26    77    53    65     3     3    0.09    89  2017    36  2001    2.06 2009
 27    77    52    65     3     2    0.10    90  2019    37  2001    1.08 2018
 28    77    52    64     3     2    0.09    91  2019    34  1940    2.13 1972
 29    76    51    64     3     2    0.10    93  2019    33  1942    3.21 1944
 30    76    51    64     4     2    0.10    90  1941    34  1967    1.28 1954


 MO   80.7  56.4  68.6   36   142    2.84   100  1954    33  1942    3.21 1944

 DATE OF OCCURANCE IN MONTH                      (6,7)        (29)         (29)