Heavy Rainfall and Flooding Concerns in the Southwest; Coastal Low to Impact the East Coast

Deep tropical moisture will lead to widespread showers and thunderstorms capable of producing flash flooding through early next week over the Southwest and Four Corners. A coastal storm is expected to develop off the southeast U.S. coast tonight and is expected to strengthen and bring flooding, dangerous rip currents, gusty winds and heavy rain up much of the East Coast through early next week. Read More >

Morristown, TN Area Seasonal Climate Summary

All normals are based on 30 year climate period from 1981 - 2010.

Chattanooga (CHA) period of record is from 1879 - Current.

Knoxville (TYS) period of record is from 1871 - Current.

Tri-Cities (TRI) period of record is from 1937 - Current.

Seasonal Averages/Totals and Normals

Chattanooga Seasonal Averages/Totals and Normals

                        

213

CXUS54 KMRX 011941

CLSCHA



CLIMATE REPORT

NATIONAL WEATHER SERVICE MORRISTOWN, TN

341 PM EDT MON SEP 01 2025



...................................



...THE CHATTANOOGA AIRPORT CLIMATE SUMMARY FOR THE SEASON, FROM

6/1/2025 TO 8/31/2025...



CLIMATE NORMAL PERIOD: 1991 TO 2020

CLIMATE RECORD PERIOD: 1879 TO 2025



WEATHER         OBSERVED          NORMAL  DEPART

                VALUE   DATE(S)   VALUE   FROM

                                          NORMAL

................................................

TEMPERATURE (F)

RECORD

 HIGH            107   06/30/2012

 LOW              39   06/01/1889

HIGHEST           96   07/15

                       07/28

                       07/29

LOWEST            55   08/27

AVG. MAXIMUM    89.2

AVG. MINIMUM    70.3

MEAN            79.7               79.4     0.3

DAYS MAX >= 90    47

DAYS MIN <= 32     0



PRECIPITATION (INCHES)

RECORD

 MAXIMUM       24.72   1920

 MINIMUM        3.36   1902

TOTALS         14.89              12.93    1.96

DAILY AVG.      0.16

DAYS >= .01       29

DAYS >= .10       20

DAYS >= .50        7

DAYS >= 1.00       3

GREATEST

 24 HR. TOTAL   6.53   08/12 TO 08/13



SNOWFALL (INCHES)

TOTALS           0.0

SINCE 7/1        0.0

SNOWDEPTH AVG.     0

DAYS >= TRACE      0

DAYS >= 1.0        0

GREATEST

 SNOW DEPTH        0



DEGREE DAYS

HEATING TOTAL      0                  1      -1

COOLING TOTAL   1377               1328      49

................................................



WIND (MPH)

HIGHEST WIND SPEED/DIRECTION    35/240    DATE  06/07

HIGHEST GUST SPEED/DIRECTION    51/250    DATE  06/07



SKY COVER

AVERAGE SKY COVER           0.51





WEATHER CONDITIONS. NUMBER OF DAYS WITH

THUNDERSTORM             39     MIXED PRECIP               2

HEAVY RAIN               16     RAIN                      20

LIGHT RAIN               39     FREEZING RAIN              0

LT FREEZING RAIN          0     HAIL                       0

HEAVY SNOW                0     SNOW                       0

LIGHT SNOW                0     SLEET                      0

FOG                      28     FOG W/VIS <= 1/4 MILE      2

HAZE                     10



-  INDICATES NEGATIVE NUMBERS.

R  INDICATES RECORD WAS SET OR TIED.

MM INDICATES DATA IS MISSING.

T  INDICATES TRACE AMOUNT.



$$

Knoxville Seasonal Averages/Totals and Normals

                        

214

CXUS54 KMRX 011941

CLSTYS



CLIMATE REPORT

NATIONAL WEATHER SERVICE MORRISTOWN, TN

341 PM EDT MON SEP 01 2025



...................................



...THE KNOXVILLE MCGHEE TYSON AIRPORT CLIMATE SUMMARY FOR THE SEASON, FROM

6/1/2025 TO 8/31/2025...



CLIMATE NORMAL PERIOD: 1991 TO 2020

CLIMATE RECORD PERIOD: 1871 TO 2025



WEATHER         OBSERVED          NORMAL  DEPART

                VALUE   DATE(S)   VALUE   FROM

                                          NORMAL

................................................

TEMPERATURE (F)

RECORD

 HIGH            105   07/01/2012

                       06/30/2012

 LOW              42   06/13/1903

HIGHEST           96   06/24

                       06/25

LOWEST            53   08/27

AVG. MAXIMUM    88.3

AVG. MINIMUM    69.2

MEAN            78.7               77.2     1.5

DAYS MAX >= 90    45               30.9    14.1

DAYS MIN <= 32     0                0.0     0.0



PRECIPITATION (INCHES)

RECORD

 MAXIMUM       22.85   1917

 MINIMUM        3.78   1944

TOTALS         11.26              13.12   -1.86

DAILY AVG.      0.12

DAYS >= .01       33

DAYS >= .10       19

DAYS >= .50        9

DAYS >= 1.00       3

GREATEST

 24 HR. TOTAL   2.12   08/23 TO 08/24



SNOWFALL (INCHES)

TOTALS           0.0

SINCE 7/1        0.0

SNOWDEPTH AVG.     0

DAYS >= TRACE      0

DAYS >= 1.0        0

GREATEST

 SNOW DEPTH        0



DEGREE DAYS

HEATING TOTAL      0                  2      -2

COOLING TOTAL   1293               1123     170

................................................



WIND (MPH)

HIGHEST WIND SPEED/DIRECTION    32/220    DATE  06/17

HIGHEST GUST SPEED/DIRECTION    43/220    DATE  06/17



SKY COVER

AVERAGE SKY COVER           0.57





WEATHER CONDITIONS. NUMBER OF DAYS WITH

THUNDERSTORM             36     MIXED PRECIP               0

HEAVY RAIN               11     RAIN                      15

LIGHT RAIN               41     FREEZING RAIN              0

LT FREEZING RAIN          0     HAIL                       0

HEAVY SNOW                0     SNOW                       0

LIGHT SNOW                0     SLEET                      0

FOG                      34     FOG W/VIS <= 1/4 MILE      2

HAZE                     24



-  INDICATES NEGATIVE NUMBERS.

R  INDICATES RECORD WAS SET OR TIED.

MM INDICATES DATA IS MISSING.

T  INDICATES TRACE AMOUNT.



$$

Tri-Cities Seasonal Averages/Totals and Normals

                        

215

CXUS54 KMRX 011941

CLSTRI



CLIMATE REPORT

NATIONAL WEATHER SERVICE MORRISTOWN, TN

341 PM EDT MON SEP 01 2025



...................................



...THE TRI-CITIES AIRPORT CLIMATE SUMMARY FOR THE SEASON, FROM

6/1/2025 TO 8/31/2025...



CLIMATE NORMAL PERIOD: 1991 TO 2020

CLIMATE RECORD PERIOD: 1937 TO 2025



WEATHER         OBSERVED          NORMAL  DEPART

                VALUE   DATE(S)   VALUE   FROM

                                          NORMAL

................................................

TEMPERATURE (F)

RECORD

 HIGH            103   06/30/2012

 LOW              38   06/02/1966

                       06/01/1966

HIGHEST           94   06/24

LOWEST            47   08/27

AVG. MAXIMUM    85.5

AVG. MINIMUM    64.0

MEAN            74.7               74.1     0.6

DAYS MAX >= 90    16

DAYS MIN <= 32     0



PRECIPITATION (INCHES)

RECORD

 MAXIMUM       25.26   2003

 MINIMUM        5.10   1987

TOTALS         17.73              12.68    5.05

DAILY AVG.      0.19

DAYS >= .01       37

DAYS >= .10       30

DAYS >= .50       18

DAYS >= 1.00       5

GREATEST

 24 HR. TOTAL   1.71   08/12 TO 08/13



SNOWFALL (INCHES)

TOTALS           0.0

SINCE 7/1        0.0

SNOWDEPTH AVG.     0

DAYS >= TRACE      0

DAYS >= 1.0        0

GREATEST

 SNOW DEPTH        0



DEGREE DAYS

HEATING TOTAL      9                  8       1

COOLING TOTAL    932                847      85

................................................



WIND (MPH)

HIGHEST WIND SPEED/DIRECTION    39/230    DATE  06/17

HIGHEST GUST SPEED/DIRECTION    54/230    DATE  06/17



SKY COVER

AVERAGE SKY COVER           0.59





WEATHER CONDITIONS. NUMBER OF DAYS WITH

THUNDERSTORM             37     MIXED PRECIP               0

HEAVY RAIN               22     RAIN                      21

LIGHT RAIN               35     FREEZING RAIN              0

LT FREEZING RAIN          0     HAIL                       0

HEAVY SNOW                0     SNOW                       0

LIGHT SNOW                0     SLEET                      0

FOG                      75     FOG W/VIS <= 1/4 MILE     11

HAZE                      6



-  INDICATES NEGATIVE NUMBERS.

R  INDICATES RECORD WAS SET OR TIED.

MM INDICATES DATA IS MISSING.

T  INDICATES TRACE AMOUNT.



$$

Monthly Averages, Totals and Normals

For recent monthly data, please review the Monthly Weather Summary product at: http://w2.weather.gov/climate/index.php?wfo=mrx.

MOST RECENT RECORDS

For recent records, please visit our Record Event Report (RER) products for Chattanooga (CHA), Knoxville (TYS), and Tri-Cities (TRI).

                        
703
SXUS74 KMRX 130814
RERCHA

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE MORRISTOWN, TN
0409 AM EDT WED AUG 13 2025

...RECORD DAILY MAXIMUM RAINFALL SET AT CHATTANOOGA, TN...

A RECORD RAINFALL OF 6.42 INCHES WAS SET AT CHATTANOOGA, TN
YESTERDAY.

THIS BREAKS THE OLD RECORD OF 1.93 INCHES SET IN 2013.


$$

                        
075
SXUS74 KMRX 050815
RERTYS

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE MORRISTOWN, TN
0409 AM EDT FRI SEP 05 2025

...RECORD DAILY MAXIMUM RAINFALL SET AT KNOXVILLE ASOS...

A RECORD RAINFALL OF 1.31 INCHES WAS SET AT KNOXVILLE ASOS
YESTERDAY. THIS BREAKS THE OLD RECORD OF 1.09 INCHES SET IN 1981.


$$

                        
775
SXUS74 KMRX 140822
RERTRI

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE MORRISTOWN, TN
0415 AM EDT THU AUG 14 2025

...RECORD DAILY MAXIMUM RAINFALL SET AT TRI-CITIES      ASOS...

A RECORD RAINFALL OF 1.7 INCHES WAS SET AT TRI-CITIES      ASOS
YESTERDAY.
THIS BREAKS THE OLD RECORD OF 1.57 INCHES SET IN 2013.


$$

Local Radar