Climatological Report (Monthly)
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CXUS53 KGRR 030552 CCA
CLMJXN

CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
616 AM EST THU JAN 1 2015

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

...THE JACKSON MI CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1944 TO 9999

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
HIGHEST            53   12/14        MM      MM       59  12/05
                                                          12/04
LOWEST             13   12/30        MM      MM       -2  12/16
AVG. MAXIMUM     37.6              34.7     2.9     32.0
AVG. MINIMUM     26.1              21.5     4.6     19.5
MEAN             31.9              28.1     3.8     25.8
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      8              12.6    -4.6       19
DAYS MIN <= 32     22              26.5    -4.5       27
DAYS MIN <= 0       0               1.1    -1.1        1

PRECIPITATION (INCHES)
TOTALS           1.40              1.87   -0.47     1.92
DAILY AVG.       0.05              0.06   -0.01     0.06
DAYS >= .01         9              12.4    -3.4       14
DAYS >= .10         3               5.2    -2.2        4
DAYS >= .50         1               0.8     0.2        1
DAYS >= 1.00        0               0.1    -0.1        0
GREATEST
 24 HR. TOTAL    0.86   12/24 TO 12/24

DEGREE_DAYS
HEATING TOTAL    1019              1144    -125     1209
 SINCE 7/1       2630              2548      82     2680
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        496               592     -96      616
...................................................

WIND (MPH)
AVERAGE WIND SPEED              7.8
RESULTANT WIND SPEED/DIRECTION   3/258
HIGHEST WIND SPEED/DIRECTION    23/260    DATE  12/31
HIGHEST GUST SPEED/DIRECTION    36/290    DATE  12/31

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            5
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY         15

AVERAGE RH (PERCENT)     78

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                9     SLEET                      0
FOG                      19     FOG W/VIS <= 1/4 MILE      1
HAZE                      3

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

&&

DECEMBER 2014 WAS A RELATIVELY QUIET MONTH. ABOVE NORMAL
TEMPERATURES... BELOW NORMAL PRECIPITATION... AND WELL BELOW NORMAL
SNOWFALL WAS THE STORY ACROSS THE AREA.

DECEMBER STARTED OUT ON THE COOL SIDE OF NORMAL BUT GRADUALLY WARMED
UP TO WELL ABOVE NORMAL BY MID-MONTH. A FEW EPISODES OF
PRECIPITATION AND MINOR SNOW ACCUMULATIONS OCCURRED IN THE FIRST
HALF OF THE MONTH. AFTER SEVERAL DAYS WITH TEMPERATURES IN THE
40S... MORE SEASONABLE AIR RETURNED ON THE 17TH AND STAYED THROUGH
THE 22ND. OCCASIONAL LIGHT SNOW AND FREEZING DRIZZLE ACCOMPANIED THE
COOLER AIR. A LARGE STORM SYSTEM AFFECTED THE AREA FROM THE 23RD
INTO THE 25TH. THIS SYSTEM HAD TOO MUCH WARM AIR TO PRODUCE
SIGNIFICANT SNOW ACCUMULATIONS ACROSS THE AREA... THOUGH IT DID
PRODUCE THREE QUARTERS TO ONE INCH OF RAIN AND UP TO A HALF INCH OF
SNOW. TEMPERATURES WERE AGAIN WELL ABOVE NORMAL FROM THE 23RD
THROUGH THE 27TH. THE MONTH ENDED WITH A SHARP COOL DOWN AND LIGHT
ACCUMULATING LAKE EFFECT SNOW.

THIS WAS GENERALLY AMONG THE TOP 5 LEAST SNOWY DECEMBERS ACROSS THE
AREA... DUE TO A LACK OF SIGNIFICANT LAKE-EFFECT SNOW AND A LACK OF
SNOW-PRODUCING STORM SYSTEMS. IN MUSKEGON... THIS WAS THE LEAST
SNOWY DECEMBER ON RECORD. REMARKABLY... THIS LARGELY UNEVENTFUL
MONTH FOLLOWED THE SNOWIEST NOVEMBER ON RECORD IN GRAND RAPIDS AND
THE SECOND SNOWIEST NOVEMBER IN MUSKEGON.


$$

CAS/EBW







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