Climatological Report (Monthly)
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CXUS53 KDTX 010939
CLMMBS

CLIMATE REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
432 AM EST MON JAN 1 2018

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

...THE  TRI CITIES MI CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1898 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
HIGHEST            59   12/05        MM      MM
LOWEST             -6   12/28        MM      MM
                        12/27
AVG. MAXIMUM     29.9              33.5    -3.6
AVG. MINIMUM     17.1              21.2    -4.1
MEAN             23.5              27.3    -3.8
DAYS MAX >= 90      0               0.0     0.0
DAYS MAX <= 32     20              13.3     6.7
DAYS MIN <= 32     29              27.3     1.7
DAYS MIN <= 0       4               0.9     3.1

PRECIPITATION (INCHES)
TOTALS           1.03              1.86   -0.83
DAILY AVG.       0.03              0.06   -0.03
DAYS >= .01        11              11.2    -0.2
DAYS >= .10         3               5.2    -2.2
DAYS >= .50         0               0.6    -0.6
DAYS >= 1.00        0               0.1    -0.1
GREATEST
 24 HR. TOTAL    0.47   12/13 TO 12/13
 STORM TOTAL       MM
 (MM/DD(HH))            MM

SNOWFALL (INCHES)
TOTALS           13.2               9.0     4.2
 LIQUID EQUIV    1.32              0.90    0.42
SINCE 7/1        13.2              12.9     0.3
 LIQUID 7/1      1.32
DAYS >= TRACE      18               7.5    10.5
DAYS >= 1.0         5               4.1     0.9
GREATEST
 SNOW DEPTH         7   12/14
 24 HR TOTAL      6.1   12/13 TO 12/13
 STORM TOTAL       MM
 (MM/DD(HH))            MM

DEGREE_DAYS
HEATING TOTAL    1281              1167     114
 SINCE 7/1       2512              2640    -128
COOLING TOTAL       0                 0       0
 SINCE 1/1        665               557     108

FREEZE DATES
RECORD
 EARLIEST     MM
 LATEST       MM
EARLIEST                        MM
LATEST                          MM
.................................................

WIND (MPH)
AVERAGE WIND SPEED              9.9
HIGHEST WIND SPEED/DIRECTION    35/240    DATE  12/05
HIGHEST GUST SPEED/DIRECTION    56/220    DATE  12/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            9
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY         13

AVERAGE RH (PERCENT)     78


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

$$


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