National Weather Service United States Department of Commerce

Storm Impacting the Northwest U.S.; Fire Weather Conditions in Southern California; Severe Weather in the South

A Pacific storm is bringing areas of low elevation rain, moderate to heavy mountain snow, and high winds to the Northwest. Strong Santa Ana winds and very dry conditions are producing elevated to critical fire weather conditions in southern California. Isolated strong to severe thunderstorms are possible through early Wednesday morning across parts of northeast Texas into western Tennessee. Read More >

The following are September climate summaries for Jackson and London as well as the September Local

Climatological Data reports for Jackson and London:

 

...THE JACKSON KY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2023...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1981 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             98   09/10/2019
 LOW              34   09/24/1989
HIGHEST           87   09/03         89      -2       91  09/21
                       09/04
                       09/06
LOWEST            51   09/14         42       9       43  09/28
AVG. MAXIMUM    78.9               79.0    -0.1     77.7
AVG. MINIMUM    60.2               59.1     1.1     58.8
MEAN            69.5               69.1     0.4     68.2
DAYS MAX >= 90     0                2.1    -2.1        1
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.0     0.0        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        9.17   2018
 MINIMUM           T   2019
TOTALS          1.83               3.42   -1.59     1.31
DAILY AVG.      0.06               0.11   -0.05     0.04
DAYS >= .01        6                8.2    -2.2       10
DAYS >= .10        4                5.6    -1.6        4
DAYS >= .50        2                2.2    -0.2        0
DAYS >= 1.00       0                1.0    -1.0        0
GREATEST
 24 HR. TOTAL   1.21   09/16 TO 09/17               0.69

SNOWFALL (INCHES)
RECORDS
 TOTAL            MM   MM
TOTALS           0.0                0.0     0.0      0.0
SINCE 7/1          T                0.0     0.0       MM
SNOWDEPTH AVG.     0                                   0
DAYS >= 1.0        0                0.0     0.0        0
GREATEST
 SNOW DEPTH        0                                   0
 24 HR TOTAL      MM                                  MM

DEGREE DAYS
HEATING TOTAL      6                 39     -33       48
 SINCE 7/1         7                 40     -33       48
COOLING TOTAL    149                161     -12      153
 SINCE 1/1      1056               1195    -139     1367
................................................................

WIND (MPH)
AVERAGE WIND SPEED              0.8
HIGHEST WIND SPEED/DIRECTION    12/240    DATE  09/06
HIGHEST GUST SPEED/DIRECTION    24/260    DATE  09/06

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.31
NUMBER OF DAYS FAIR           18
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     78

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       4
LIGHT RAIN                9     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      19     FOG W/VIS <= 1/4 MILE     10
HAZE                      1

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

$$

 

PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   JACKSON KY
                                          MONTH:     SEPTEMBER
                                          YEAR:      2023
                                          LATITUDE:   37 35 N
                                          LONGITUDE:  83 19 W

  TEMPERATURE IN F:       :PCPN:    SNOW:  WIND      :SUNSHINE: SKY     :PK WND
================================================================================
1   2   3   4   5  6A  6B    7    8   9   10  11  12  13   14  15   16   17  18
                                     12Z  AVG MX 2MIN
DY MAX MIN AVG DEP HDD CDD  WTR  SNW DPTH SPD SPD DIR MIN PSBL S-S WX    SPD DR
================================================================================

 1  86  58  72  -1   0   7 0.00  0.0    0  0.9  6 310   M    M   0        10 170
 2  86  65  76   3   0  11 0.00  0.0    0  1.5  7 310   M    M   0 1      11 290
 3  87  66  77   4   0  12 0.00  0.0    0  0.4  5 340   M    M   0         8 340
 4  87  67  77   5   0  12 0.00  0.0    0  0.5  6 160   M    M   1         9 170
 5  86  69  78   6   0  13 0.00  0.0    0  0.6  6 280   M    M   0        11 270
 6  87  69  78   6   0  13 0.39  0.0    0  1.9 12 240   M    M   1 123    24 260
 7  81  68  75   3   0  10    T  0.0    0  1.5  9 310   M    M   6        18 270
 8  81  63  72   1   0   7 0.00  0.0    0  1.1  7 340   M    M   6 12     11 350
 9  79  65  72   1   0   7 0.00  0.0    0  0.0  6 130   M    M   7 1      11  40
10  79  65  72   1   0   7    T  0.0    0  0.3  7 310   M    M   8 1      10 290
11  81  62  72   1   0   7 0.00  0.0    0  0.6  6 140   M    M   4 12     10 140
12  76  65  71   1   0   6 0.04  0.0    0  1.7  8 320   M    M   3 13     13 300
13  78  61  70   0   0   5 0.00  0.0    0  1.9 10 310   M    M   4 12     14 320
14  77  51  64  -6   1   0 0.00  0.0    0  0.1  8 140   M    M   0 18     17  70
15  78  55  67  -2   0   2 0.00  0.0    0  0.6  5 160   M    M   1        11  60
16  79  56  68  -1   0   3 0.63  0.0    0  0.0  6 160   M    M   6 1      10 160
17  72  57  65  -4   0   0 0.58  0.0    0  2.0 10 300   M    M   8 12     20 320
18  73  55  64  -4   1   0 0.00  0.0    0  0.6  6 300   M    M   6 12     10 310
19  75  54  65  -3   0   0 0.00  0.0    0  0.6  6 140   M    M   3 12     10 130
20  79  53  66  -2   0   1 0.00  0.0    0  1.3  6 150   M    M   1 1       9 140
21  80  58  69   2   0   4 0.00  0.0    0  0.3  7 140   M    M   0        13 120
22  81  59  70   3   0   5 0.00  0.0    0  0.3  6 320   M    M   1        13 320
23  75  55  65  -2   0   0 0.00  0.0    0  0.5  8 340   M    M   0        12 350
24  65  59  62  -4   3   0 0.00  0.0    0  0.3  5 120   M    M   9         8 360
25  76  57  67   1   0   2 0.00  0.0    0  0.0  6 140   M    M   4 1      10 120
26  79  57  68   2   0   3 0.00  0.0    0  0.8  7 330   M    M   1 12     10 330
27  69  59  64  -1   1   0 0.01  0.0    0  1.3  6 120   M    M   4 12     10 110
28  74  59  67   2   0   2 0.18  0.0    0  1.9  8 170   M    M   5 123    14 270
29  81  58  70   5   0   5    T  0.0    0  0.5  7 300   M    M   3        10 310
30  80  60  70   6   0   5 0.00  0.0    0  0.4  7 130   M    M   1 1       9 170
================================================================================
SM 2367 1805         6 149  1.83  0.0     24.4          M       93
================================================================================
AV 78.9 60.2                               0.8 FASTST   M    M   3    MAX(MPH)
                                 MISC ---->    12 240                 24 260
================================================================================
NOTES:
# LAST OF SEVERAL OCCURRENCES

COLUMN 17 PEAK WIND IN M.P.H.

PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) , PAGE 2

                                          STATION:   JACKSON KY
                                          MONTH:     SEPTEMBER
                                          YEAR:      2023
                                          LATITUDE:   37 35 N
                                          LONGITUDE:  83 19 W

[TEMPERATURE DATA]      [PRECIPITATION DATA]       SYMBOLS USED IN COLUMN 16

AVERAGE MONTHLY: 69.5   TOTAL FOR MONTH:   1.83    1 = FOG OR MIST
DPTR FM NORMAL:   0.4   DPTR FM NORMAL:   -1.59    2 = FOG REDUCING VISIBILITY
HIGHEST:    87 ON  6, 4  GRTST 24HR  1.21 ON 16-17      TO 1/4 MILE OR LESS
LOWEST:     51 ON 14                               3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:   0.0 INCH    5 = HAIL
                        GRTST 24HR  0.0            6 = FREEZING RAIN OR DRIZZLE
                        GRTST DEPTH:  0            7 = DUSTSTORM OR SANDSTORM:
                                                       VSBY 1/2 MILE OR LESS
                                                   8 = SMOKE OR HAZE
[NO. OF DAYS WITH]      [WEATHER - DAYS WITH]      9 = BLOWING SNOW
                                                   X = TORNADO
MAX 32 OR BELOW:   0    0.01 INCH OR MORE:   6
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   4
MIN 32 OR BELOW:   0    0.50 INCH OR MORE:   2
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   0

[HDD (BASE 65) ]
TOTAL THIS MO.     6    CLEAR  (SCALE 0-3)  17
DPTR FM NORMAL   -33    PTCLDY (SCALE 4-7)  12
TOTAL FM JUL 1     7    CLOUDY (SCALE 8-10)  1
DPTR FM NORMAL   -33

[CDD (BASE 65) ]
TOTAL THIS MO.   149
DPTR FM NORMAL   -12    [PRESSURE DATA]
TOTAL FM JAN 1  1056    HIGHEST SLP 30.24 ON 21
DPTR FM NORMAL  -139    LOWEST  SLP 29.81 ON  7

[REMARKS]
#FINAL-09-23#

 

...THE LONDON KY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2023...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1954 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             97   09/05/2007
 LOW              32   09/24/1983
HIGHEST           89   09/04         MM      MM       90  09/21
                       09/05
LOWEST            50   09/18         MM      MM       38  09/28
AVG. MAXIMUM    81.4               80.0     1.4     78.0
AVG. MINIMUM    57.6               57.6     0.0     56.1
MEAN            69.5               68.8     0.7     67.0
DAYS MAX >= 90     0                3.0    -3.0        1
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.0     0.0        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        8.50   2004
 MINIMUM        0.11   2019
TOTALS          1.70               3.55   -1.85     2.09
DAILY AVG.      0.06               0.12   -0.06     0.07
DAYS >= .01        7                8.3    -1.3        9
DAYS >= .10        4                5.5    -1.5        4
DAYS >= .50        1                2.1    -1.1        1
DAYS >= 1.00       1                1.0     0.0        1
GREATEST
 24 HR. TOTAL   1.34   09/27 TO 09/28               1.06

SNOWFALL (INCHES)
RECORDS
 TOTAL            MM   MM
TOTALS            MM                 MM      MM       MM
SINCE 7/1         MM                 MM      MM       MM
SNOWDEPTH AVG.    MM                                  MM
DAYS >= 1.0       MM                 MM      MM       MM
GREATEST
 SNOW DEPTH       MM                                  MM
 24 HR TOTAL      MM                                  MM

DEGREE DAYS
HEATING TOTAL      3                 38     -35       59
 SINCE 7/1         3                 39     -36       59
COOLING TOTAL    147                152      -5      129
 SINCE 1/1      1041               1192    -151     1285
................................................................

WIND (MPH)
AVERAGE WIND SPEED              2.7
HIGHEST WIND SPEED/DIRECTION    17/270    DATE  09/17
HIGHEST GUST SPEED/DIRECTION    24/270    DATE  09/07

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           18
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY          1

AVERAGE RH (PERCENT)     75

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       3
LIGHT RAIN                7     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      22     FOG W/VIS <= 1/4 MILE      8
HAZE                      0

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

$$

 

PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   LONDON KY
                                          MONTH:     SEPTEMBER
                                          YEAR:      2023
                                          LATITUDE:   37  4 N
                                          LONGITUDE:  84  5 W

  TEMPERATURE IN F:       :PCPN:    SNOW:  WIND      :SUNSHINE: SKY     :PK WND
================================================================================
1   2   3   4   5  6A  6B    7    8   9   10  11  12  13   14  15   16   17  18
                                     12Z  AVG MX 2MIN
DY MAX MIN AVG DEP HDD CDD  WTR  SNW DPTH SPD SPD DIR MIN PSBL S-S WX    SPD DR
================================================================================

 1  87  56  72  -1   0   7 0.00    M    M  1.7  9 190   M    M   0        13  50
 2  87  62  75   2   0  10 0.00    M    M  1.4 13 260   M    M   1 1      16 270
 3  88  61  75   2   0  10 0.00    M    M  1.2  8 130   M    M   1 1      11 140
 4  89  63  76   4   0  11 0.00    M    M  1.1  8 260   M    M   1 1      11 260
 5  89  65  77   5   0  12 0.00    M    M  2.4 13 260   M    M   0        18 250
 6  87  65  76   4   0  11 0.02    M    M  4.2 15 260   M    M   5 12     20 270
 7  81  68  75   3   0  10 0.03    M    M  4.1 16 270   M    M   7 13     24 270
 8  82  62  72   1   0   7 0.00    M    M  2.8 10  30   M    M   6 1      15 350
 9  84  65  75   4   0  10 0.00    M    M  5.1 13  70   M    M   7 3      21  80
10  81  64  73   2   0   8 0.00    M    M  4.4 12  20   M    M   5        19  40
11  85  60  73   3   0   8 0.00    M    M  1.2  8 250   M    M   3 12     12 190
12  79  63  71   1   0   6 0.02    M    M  2.4 10 340   M    M   5 1      15 340
13  80  57  69  -1   0   4 0.00    M    M  3.5 13 340   M    M   5 12     16  20
14  80  51  66  -4   0   1 0.00    M    M  5.0 15  10   M    M   0        21  40
15  81  54  68  -1   0   3 0.00    M    M  3.7 10  40   M    M   0        15  30
16  79  55  67  -2   0   2 0.12    M    M  2.9 15 220   M    M   7 1      23 230
17  75  55  65  -3   0   0 0.17    M    M  5.2 17 270   M    M   8 12     22 290
18  75  50  63  -5   2   0 0.00    M    M  1.8  9 310   M    M   4 12     13 250
19  78  52  65  -3   0   0 0.00    M    M  1.4  7 100   M    M   4 12     12 260
20  80  52  66  -1   0   1 0.00    M    M  2.2 13 190   M    M   2 1      18 180
21  82  53  68   1   0   3 0.00    M    M  0.9  9  40   M    M   2 1      12  20
22  84  55  70   3   0   5 0.00    M    M  2.7 12  30   M    M   1 1      22  30
23  79  55  67   1   0   2 0.00    M    M  5.3 13 340   M    M   0        18 350
24  78  52  65  -1   0   0 0.00    M    M  3.4 12  20   M    M   2        16  30
25  82  56  69   3   0   4 0.00    M    M  1.6 10  20   M    M   1 1      16  20
26  85  53  69   4   0   4 0.00    M    M  1.8  9  90   M    M   1 1      14  90
27  69  58  64  -1   1   0 1.19    M    M  2.3 12 350   M    M   3 13     18 360
28  74  57  66   2   0   1 0.15    M    M  3.2 13 290   M    M   5 13     21 290
29  81  54  68   4   0   3 0.00    M    M  1.4  8 260   M    M   3 12     11 280
30  82  55  69   5   0   4 0.00    M    M  1.7 10  30   M    M   2 12     15  30
================================================================================
SM 2443 1728         3 147  1.70    M     82.0          M       91
================================================================================
AV 81.4 57.6                               2.7 FASTST   M    M   3    MAX(MPH)
                                 MISC ---->    17 270                 24 270
================================================================================
NOTES:
# LAST OF SEVERAL OCCURRENCES

COLUMN 17 PEAK WIND IN M.P.H.

PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) , PAGE 2

                                          STATION:   LONDON KY
                                          MONTH:     SEPTEMBER
                                          YEAR:      2023
                                          LATITUDE:   37  4 N
                                          LONGITUDE:  84  5 W

[TEMPERATURE DATA]      [PRECIPITATION DATA]       SYMBOLS USED IN COLUMN 16

AVERAGE MONTHLY: 69.5   TOTAL FOR MONTH:   1.70    1 = FOG OR MIST
DPTR FM NORMAL:   0.7   DPTR FM NORMAL:   -1.85    2 = FOG REDUCING VISIBILITY
HIGHEST:    89 ON  5, 4  GRTST 24HR  1.34 ON 27-28      TO 1/4 MILE OR LESS
LOWEST:     50 ON 18                               3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:  M            5 = HAIL
                        GRTST 24HR    M  ON   M    6 = FREEZING RAIN OR DRIZZLE
                        GRTST DEPTH:  M  ON   M    7 = DUSTSTORM OR SANDSTORM:
                                                       VSBY 1/2 MILE OR LESS
                                                   8 = SMOKE OR HAZE
[NO. OF DAYS WITH]      [WEATHER - DAYS WITH]      9 = BLOWING SNOW
                                                   X = TORNADO
MAX 32 OR BELOW:   0    0.01 INCH OR MORE:   7
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   4
MIN 32 OR BELOW:   0    0.50 INCH OR MORE:   1
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   1

[HDD (BASE 65) ]
TOTAL THIS MO.     3    CLEAR  (SCALE 0-3)  18
DPTR FM NORMAL   -35    PTCLDY (SCALE 4-7)  11
TOTAL FM JUL 1     3    CLOUDY (SCALE 8-10)  1
DPTR FM NORMAL   -34

[CDD (BASE 65) ]
TOTAL THIS MO.   147
DPTR FM NORMAL    -5    [PRESSURE DATA]
TOTAL FM JAN 1  1041    HIGHEST SLP 30.25 ON 21
DPTR FM NORMAL  -151    LOWEST  SLP 29.83 ON  7

[REMARKS]
#FINAL-09-23#