Climatological Report (Monthly)
Issued by NWS Detroit/Pontiac, MI

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CXUS53 KDTX 191614
CLMDTW

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

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

...THE DETROIT MI CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1874 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              69   12/06/1998
 LOW              -11   12/29/1880
HIGHEST            58   12/05        MM      MM
LOWEST             -4   12/27        MM      MM
AVG. MAXIMUM     33.0              36.1    -3.1
AVG. MINIMUM     20.2              24.1    -3.9
MEAN             26.6              30.1    -3.5
DAYS MAX >= 90      0               0.0     0.0
DAYS MAX <= 32     16              10.5     5.5
DAYS MIN <= 32     28              23.9     4.1
DAYS MIN <= 0       2               0.7     1.3

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         5.19   1967
 MINIMUM         0.42   1900
TOTALS           1.48              2.46   -0.98
DAILY AVG.       0.05              0.08   -0.03
DAYS >= .01        18              13.7     4.3
DAYS >= .10         4               6.2    -2.2
DAYS >= .50         0               1.4    -1.4
DAYS >= 1.00        0               0.2    -0.2
GREATEST
 24 HR. TOTAL    0.42   12/13 TO 12/13
 STORM TOTAL       MM
 (MM/DD(HH))            MM

SNOWFALL (INCHES)
RECORDS
 TOTAL           34.9   1974
                        0
                        0
TOTALS           22.5               9.6    12.9
 LIQUID EQUIV    2.25              1.00    1.25
SINCE 7/1        22.5              11.2    11.3
 LIQUID 7/1      2.25
DAYS >= TRACE      18               8.5     9.5
DAYS >= 1.0         6               3.2     2.8
GREATEST
 SNOW DEPTH         9   12/14
 24 HR TOTAL      6.3   12/13 TO 12/13
 STORM TOTAL       MM
 (MM/DD(HH))            MM

DEGREE_DAYS
HEATING TOTAL    1181              1082      99
 SINCE 7/1       2244              2297     -53
COOLING TOTAL       0                 0       0
 SINCE 1/1        918               803     115

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

WIND (MPH)
AVERAGE WIND SPEED              9.7
HIGHEST WIND SPEED/DIRECTION    32/240    DATE  12/05
HIGHEST GUST SPEED/DIRECTION    45/210    DATE  12/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.80
NUMBER OF DAYS FAIR            1
NUMBER OF DAYS PC             10
NUMBER OF DAYS CLOUDY         20

AVERAGE RH (PERCENT)     70


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

$$

---------------------------------------------------------------
MONTHLY CLIMATE DATA FOR NWS WHITE LAKE - DECEMBER 2017

...TEMPERATURE DATA...              ...PRECIPITATION DATA...
AVERAGE MAXIMUM...28.5              MONTHLY TOTAL..........1.36
AVERAGE MINIMUM...14.4              GREATEST DAILY TOTAL...0.41
MONTHLY AVERAGE...21.4              ON THE 13TH
                                    2017 TOTAL............34.36

...HEATING DEGREE DAYS...           ...SNOWFALL DATA...
MONTHLY TOTAL............1342       MONTHLY TOTAL............24.6
2017-2018 SEASON TOTAL...2815       2017-2018 SEASON TOTAL...24.8

...COOLING DEGREE DAYS...
MONTHLY TOTAL...0
2017 TOTAL......380

================================================================
       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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