Climatological Report (Monthly)
Issued by NWS Austin/San Antonio, TX

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CXUS54 KEWX 040213
CLMSAT

CLIMATE REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
0813 PM CST WED JAN 3 2018

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

...THE SAN ANTONIO CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1886 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
HIGHEST            83   12/04                         83  12/26
LOWEST             28   12/31                         25  12/19
AVG. MAXIMUM     62.7              64.0    -1.3     63.8
AVG. MINIMUM     43.0              41.7     1.3     47.8
MEAN             52.9              52.9     0.0     55.8
DAYS MAX >= 90      0                                  0
DAYS MAX <= 32      0                                  0
DAYS MIN <= 32      3                                  2
DAYS MIN <= 0       0                                  0

PRECIPITATION (INCHES)
TOTALS           4.04              1.91    2.13     6.22
DAILY AVG.       0.13              0.06    0.07     0.20
DAYS >= .01         6                                 10
DAYS >= .10         5                                  5
DAYS >= .50         4                                  3
DAYS >= 1.00        2                                  2
GREATEST
 24 HR. TOTAL    1.55   12/06 TO 12/07

SNOWFALL (INCHES)
TOTALS            1.9               0.0     1.9      0.0
SINCE 7/1         1.9               0.0     1.9      0.0

DEGREE_DAYS
HEATING TOTAL     385               391      -6      318
 SINCE 7/1        517               602     -85      376
COOLING TOTAL      18                14       4       42
 SINCE 1/1       3467              3131     336     3388
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.9
HIGHEST WIND SPEED/DIRECTION    28/010    DATE  12/05
HIGHEST GUST SPEED/DIRECTION    37/330    DATE  12/22

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            2
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY         18

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       4
LIGHT RAIN               13     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW                1     SLEET                      1
FOG                      17     FOG W/VIS <= 1/4 MILE      6
HAZE                      5

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

&&

MONTHLY CLIMATE SUMMARY:
DECEMBER 2017 WAS THE 49TH COOLEST AND 12TH WETTEST
SINCE RECORD KEEPING BEGAN.

SEA LEVEL PRESSURE DATA:
HIGHEST SLP 30.56 INCHES ON THE 31TH
LOWEST  SLP 29.79 INCHES ON THE 21ST

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

                                          STATION:   SAN ANTONIO
                                          MONTH:     DECEMBER
                                          YEAR:      2017
                                          LATITUDE:   29 31 N
                                          LONGITUDE:  98 28 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  78  54  66  10   0   1 0.00  0.0    0  5.3 14 160   M    M   6        19 170
 2  78  51  65  10   0   0 0.00  0.0    0  5.1 13 160   M    M   5 18     16 170
 3  78  64  71  16   0   6 0.27  0.0    0  6.7 18 120   M    M   9 12     23 170
 4  83  69  76  21   0  11 0.00  0.0    0 10.4 20 180   M    M   8        25 180
 5  71  49  60   5   5   0    T  0.0    0 13.3 28  10   M    M  10 1      36  10
 6  49  39  44 -10  21   0 1.00  0.0    0 10.4 20  10   M    M  10 1      26 350
 7  43  32  38 -16  27   0 1.06  1.9    0  8.5 20 360   M    M  10 14     28 360
 8  55  31  43 -11  22   0 0.00  0.0    2  6.2 14 300   M    M   5        18 290
 9  69  35  52  -2  13   0 0.00  0.0    0  9.0 25 330   M    M   0        29 320
10  66  33  50  -4  15   0 0.00  0.0    0  5.5 10 230   M    M   4        13 230
11  74  34  54   1  11   0 0.00  0.0    0  4.8 15 220   M    M   5        22 220
12  65  40  53   0  12   0 0.00  0.0    0  8.8 21  20   M    M   2        26  20
13  60  35  48  -5  17   0 0.00  0.0    0  6.2 13 210   M    M   5        18 210
14  63  42  53   0  12   0 0.00  0.0    0  6.3 17  20   M    M   8        26  20
15  59  47  53   0  12   0 0.00  0.0    0  7.4 17  10   M    M   8        25  30
16  51  43  47  -5  18   0 0.92  0.0    0  2.7 16 160   M    M   9 1      20 170
17  56  45  51  -1  14   0    T  0.0    0  3.3 10 280   M    M   9 12     12 280
18  59  49  54   2  11   0 0.04  0.0    0  2.5 20 100   M    M  10 12     22 100
19  66  55  61   9   4   0 0.75  0.0    0  4.8 14 190   M    M   9 123    18 190
20  73  49  61   9   4   0 0.00  0.0    0  5.0 13 270   M    M   4 12     16 250
21  77  44  61   9   4   0    T  0.0    0  7.2 21 140   M    M   4 1      23 130
22  75  44  60   8   5   0    T  0.0    0 11.5 25 330   M    M  10 18     37 330
23  60  39  50  -2  15   0 0.00  0.0    0  4.0 16 340   M    M   6        21 340
24  71  38  55   3  10   0 0.00  0.0    0  8.2 22  10   M    M   4        29  30
25  51  34  43  -9  22   0 0.00  0.0    0  4.6 14  30   M    M   7        19  30
26  53  44  49  -3  16   0    T  0.0    0  7.2 14  20   M    M  10 12     20  30
27  44  37  41 -11  24   0    T  0.0    0 12.4 22  10   M    M  10 18     30 360
28  50  37  44  -7  21   0 0.00  0.0    0  5.0 10 360   M    M  10        13 360
29  52  42  47  -4  18   0    T  0.0    0  4.5 10  40   M    M  10 18     12  50
30  65  50  58   7   7   0 0.00  0.0    0  4.8 13  70   M    M   9 1      15  80
31  51  28  40 -11  25   0    T  0.0    0 13.1 24  10   M    M  10 168    32  10
================================================================================
SM 1945 1333       385  18  4.04     1.9 214.7          M      226
================================================================================
AV 62.7 43.0                               6.9 FASTST   M    M   7    MAX(MPH)
                                 MISC ---->  # 28  10               # 37  330
================================================================================
NOTES:
# LAST OF SEVERAL OCCURRENCES

COLUMN 17 PEAK WIND IN M.P.H.
SYMBOLS USED IN COLUMN 16
1 = FOG OR MIST
2 = FOG REDUCING VISIBILITY
3 = THUNDER
4 = ICE PELLETS
5 = HAIL
6 = FREEZING RAIN OR DRIZZLE
7 = DUSTSTORM OR SANDSTORM:
8 = SMOKE OR HAZE
9 = BLOWING SNOW
X = TORNADO


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