Climatological Report (Monthly)
Issued by NWS

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CXUS53 KDTX 191615 AAA
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.

$$
================================================================
       SOUTHEAST MICHIGAN CLIMATE SUMMARY FOR DECEMBER 2017


DECEMBER 2017 MONTHLY STATISTICS AND RANKINGS
-----------------------------------------------------------------

SNOWFALL
                ACTUAL    NORMAL    DEPARTURE     RANKING
DETROIT AREA    22.5"      9.6"      +12.9"      5TH SNOWIEST
FLINT AREA      23.3"     11.8"      +11.5"      5TH SNOWIEST
SAGINAW         13.2"      9.0"       +4.2"     23RD SNOWIEST

SNOW YEAR SINCE JULY 1*

                ACTUAL    NORMAL     DEPARTURE     RANKING
DETROIT AREA    22.5"      11.2"      +11.3"     14TH SNOWIEST
FLINT AREA      23.7"      14.7"       +9.0"     10TH SNOWIEST
SAGINAW         13.2"      12.9"       +0.3"     36TH SNOWIEST

      *NORMAL TO DATE (AS OF DECEMBER 31, 2017)

PRECIPITATION
                ACTUAL    NORMAL     DEPARTURE     RANKING
DETROIT AREA    1.48"      2.46"      -0.98"     37TH DRIEST
FLINT AREA      1.38"      1.92"      -0.54"     32ND DRIEST
SAGINAW         1.03"      1.86       -0.83"     29TH DRIEST

WATER YEAR SINCE JANUARY 1*

                ACTUAL    NORMAL     DEPARTURE     RANKING
DETROIT AREA    35.46"    33.47"      +1.99"     34TH WETTEST
FLINT AREA      35.71"    31.37"      +4.34"     17TH WETTEST
SAGINAW         37.75"    31.54"      +6.21"      8TH WETTEST

      *NORMAL TO DATE (AS OF DECEMBER 31, 2017)

AVERAGE TEMPERATURE
                ACTUAL    NORMAL     DEPARTURE     RANKING
DETROIT AREA     26.6      30.1       -3.5       38TH COLDEST
FLINT AREA       22.6      27.4       -5.4       12TH COLDEST
SAGINAW          23.5      27.3       -3.8       25TH COLDEST

AVERAGE HIGH TEMPERATURE
                ACTUAL    NORMAL     DEPARTURE     RANKING
DETROIT AREA     33.0      36.1       -3.1       44TH COLDEST
FLINT AREA       29.8      34.1       -4.3       14TH COLDEST
SAGINAW          29.9      33.5       -3.6       26TH COLDEST

AVERAGE LOW TEMPERATURE
                ACTUAL    NORMAL     DEPARTURE     RANKING
DETROIT AREA     20.2      24.1       -3.9       32ND COLDEST
FLINT AREA       15.4      20.8       -5.4       12TH COLDEST
SAGINAW          17.1      21.2       -4.1       27TH COLDEST


DETROIT AREA HAS A CLIMATE RECORD DATING TO NOVEMBER 1874
FLINT AREA HAS A CLIMATE RECORD DATING TO JANUARY 1921
SAGINAW HAS A CLIMATE RECORD DATING TO 1912



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