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
                                      APRIL

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

 1     65    39    52    13     0    0.13    83  1974    21  1964    0.97 1952
 2     65    39    52    13     0    0.13    88  2010    27  1992    1.01 2005
 3     65    40    52    13     0    0.12    82  2012    22  1992    1.33 2012
 4     66    40    53    12     0    0.12    82  1981    22  1943    2.52 1977
 5     66    40    53    12     0    0.13    84  1947    23  1944    0.90 1983

 6     66    41    53    12     0    0.13    86  2010    27  2004    1.38 1948
 7     67    41    54    11     0    0.13    83  2010    21  1982    1.58 2015
 8     67    41    54    11     0    0.13    84  1959    21  2007    1.90 1957
 9     67    41    54    11     0    0.13    84  2015    22  2007    0.71 1961
 10    68    42    55    10     0    0.13    89  1995    22  1985    2.18 2003

 11    68    42    55    10     0    0.13    86  2001    25  1960    0.90 1962
 12    68    42    55    10     0    0.13    84  1945    25  1989    1.83 2020
 13    69    43    56    10     0    0.13    86  1981    23  1940    3.26 2020
 14    69    43    56     9     0    0.13    85  1938    24  1943    0.58 2019
 15    69    43    56     9     0    0.13    85  1945    25  1943    2.32 1956

 16    70    43    57     9     0    0.13    87  2002    25  2014    1.56 1998
 17    70    44    57     8     0    0.13    85  2002    24  1949    1.30 2003
 18    70    44    57     8     0    0.12    87  2002    29  1951    0.95 1981
 19    71    44    58     8     0    0.12    90  1941    25  1983    2.89 2019
 20    71    45    58     8     0    0.12    85  2016    24  1983    1.40 1940

 21    71    45    58     8     1    0.13    85  1963    26  1983    0.89 1997
 22    72    45    58     7     1    0.12    86  1944    25  2021    1.24 2006
 23    72    46    59     7     1    0.13    87  1980    26  1986    1.87 2017
 24    72    46    59     7     1    0.12    87  1960    28  1986    1.00 1941
 25    72    46    59     7     1    0.13    87  1960    31  1969    1.99 1975

 26    73    47    60     6     1    0.12    88  1986    31  1972    1.26 1967
 27    73    47    60     6     1    0.12    89  1986    29  1976    2.01 1949
 28    73    47    60     6     1    0.12    88  1957    32  2005    1.15 1970
 29    73    47    60     6     1    0.13    90  2017    30  1967    1.55 2020
 30    74    48    61     5     1    0.12    89  1942    30  2008    0.73 1953


 MO   69.4  43.3  56.4  272    13    3.79    90  1941    21  1964    3.26 2020
                                                 2017        1982              
                                                             2007              

 DATE OF OCCURANCE IN MONTH                    (19,29)     (1,7,8)         (13)