Climatological Report (Monthly)
Issued by NWS Grand Rapids, MI

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CXUS53 KGRR 011852
CLMGRR

CLIMATE REPORT...WITH NARRATIVE
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
152 PM EST WED JAN 1 2014

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

...THE GRAND RAPIDS MI CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1892 TO 2013

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              69   12/05/2001
 LOW              -18   12/19/1983
HIGHEST            59   12/04        53       6       65  12/04
                                                          12/03
LOWEST              3   12/16         1       2       17  12/25
AVG. MAXIMUM     31.4              34.8    -3.4     41.7
AVG. MINIMUM     20.8              23.5    -2.7     28.5
MEAN             26.1              29.2    -3.1     35.1
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     19              11.7     7.3        8
DAYS MIN <= 32     28              25.0     3.0       22
DAYS MIN <= 0       0               0.7    -0.7        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.95   1893
 MINIMUM         0.31   1913
TOTALS           2.70              2.50    0.20     2.85
DAILY AVG.       0.09              0.08    0.01     0.09
DAYS >= .01        21              16.0     5.0       17
DAYS >= .10        12               6.9     5.1        8
DAYS >= .50         1               1.1    -0.1        1
DAYS >= 1.00        0               0.3    -0.3        1
GREATEST
 24 HR. TOTAL    0.57   12/03 TO 12/03           12/20 TO 12/20


SNOWFALL (INCHES)
RECORDS
 TOTAL           59.2   2000
 24 HR TOTAL     15.1   12/10/1970 TO 12/11/1970
 SNOW DEPTH        22   12/27/1951
                        12/26/1951
                        12/25/1951
TOTALS           34.7              21.9    12.8      7.2
SINCE 7/1        36.9              29.2     7.7      7.5
SNOWDEPTH AVG.      5                 3       2        0
DAYS >= TRACE      23              13.3     9.7       14
DAYS >= 1.0        12               6.6     5.4        2
GREATEST
 SNOW DEPTH        10   12/18                          3  12/27
                                                          12/26
 24 HR TOTAL      4.8   12/12                             12/20


DEGREE_DAYS
HEATING TOTAL    1198              1111      87      919
 SINCE 7/1       2520              2449      71     2228
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        767               699      68     1039

FREEZE DATES
RECORD
 EARLIEST     09/03/1946
 LATEST       06/04/1945
EARLIEST                        10/13
LATEST                          05/02
.................................................

WIND (MPH)
AVERAGE WIND SPEED              9.8
RESULTANT WIND SPEED/DIRECTION   3/245
HIGHEST WIND SPEED/DIRECTION    31/260    DATE  12/05
HIGHEST GUST SPEED/DIRECTION    41/260    DATE  12/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   16
AVERAGE SKY COVER           0.90

AVERAGE RH (PERCENT)     76

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN                5     FREEZING RAIN              2
LT FREEZING RAIN          6     HAIL                       0
HEAVY SNOW                1     SNOW                      10
LIGHT SNOW               23     SLEET                      2
FOG                      25     FOG W/VIS <= 1/4 MILE      4
HAZE                     17

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

&&

DECEMBER ENDED UP BEING COLDER THAN NORMAL AND SNOWIER THAN NORMAL.
THIS WAS THE SEVENTH SNOWIEST DECEMBER FOR GRAND RAPIDS AND THE
NINTH SNOWIEST DECEMBER FOR MUSKEGON.

HIGHLIGHTS FOR THE MONTH INCLUDE PERSISTENT LAKE EFFECT SNOW...A
MAJOR ICE STORM ON THE 21ST...LOCALLY VERY HEAVY SNOW ON THE
23RD...AND A SNOWY CHRISTMAS DAY. LAKESHORE AREAS STEADILY PILED UP
SNOW THIS MONTH UNDER COLDER THAN NORMAL CONDITIONS AND FAVORABLE
WIND DIRECTION. SOME OF THIS SNOW DID MAKE ITS WAY INLAND AND EVEN
HELPED BRING LANSING INTO ABOVE NORMAL STATUS FOR SNOW.

THE MAJOR WINTER EVENT OF THE SEASON GOT UNDERWAY ON THE 21ST IN THE
FORM OF AN ICE STORM. THIS ICE STORM PRODUCED SIGNIFICANT ICING
AMOUNTS BETWEEN 0.25 AND 0.75 INCH ACROSS MOST OF SOUTHERN LOWER
MICHIGAN. THE ICING RESULTED IN WIDESPREAD AND PROLONGED POWER
OUTAGES RIGHT THROUGH THE CHRISTMAS HOLIDAY. AT ONE POINT...570,000
CUSTOMERS HAD LOST POWER ACROSS SOUTHERN LOWER MICHIGAN...MAINLY
FROM LANSING TO HASTINGS AND OVER TO GRAND RAPIDS. IT WAS ONE OF THE
WORST POWER OUTAGES THAT ANY OF THE POWER COMPANIES HAD EVER FACED.
SOME WERE IN THE DARK A WEEK AFTER THE ICE STORM.

LOCALLY VERY HEAVY LAKE EFFECT SNOW AFFECTED THE LAKESHORE AREAS AND
EVEN INLAND ON THE 23RD. UNIQUE CIRCUMSTANCES CAME TOGETHER TO
PRODUCE HEAVY BANDED SNOWFALL...IN SOME CASES 12 TO 18 INCHES ACROSS
NORTHERN MUSKEGON COUNTY. NUMEROUS LOCATIONS REPORTED 2 TO 3 INCH
PER HOUR SNOWFALL AMOUNTS.

FINALLY...ON CHRISTMAS DAY A CLIPPER SYSTEM MOVED OVER THE STATE AND
LAKE MICHIGAN AIDED IN THE DEVELOPMENT OF SNOW. SOME LOCATIONS
RECEIVED SEVERAL INCHES AND TRAVEL WAS IMPEDED.

$$

HOVING








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