Climatological Report (Monthly)
Issued by NWS Buffalo, NY

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CXUS51 KBUF 171433
CLMROC

CLIMATE REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
625 AM EST WED JAN 1 2014

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

...THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2013

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              72   12/03/1982
 LOW              -16   12/20/1942
HIGHEST            62   12/05                         70  12/04
LOWEST             -4   12/17                         16  12/29
AVG. MAXIMUM     35.6              36.5    -0.9     41.7
AVG. MINIMUM     21.5              23.5    -2.0     30.6
MEAN             28.5              30.0    -1.5     36.2
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     14              10.4     3.6        8
DAYS MIN <= 32     28              24.9     3.1       22
DAYS MIN <= 0       2               0.4     1.6        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.17   1878
 MINIMUM         0.62   1958
TOTALS           2.99              2.63    0.36     3.57
DAYS >= .01        23                                 17
DAYS >= .10         8                                 11
DAYS >= .50         1                                  1
DAYS >= 1.00        0                                  0
GREATEST
 24 HR. TOTAL    1.16   12/21 TO 12/22

SNOWFALL (INCHES)
RECORDS
 TOTAL           46.5   2010
TOTALS           22.5              21.8     0.7     22.6
SINCE 7/1        36.0              29.2     6.8     23.4
SNOWDEPTH AVG.      2                 3      -1        2
DAYS >= 1.0         7               6.3     0.7        6
GREATEST
 SNOW DEPTH         8   12/15                         11  12/30
 24 HR TOTAL      4.5   12/14

DEGREE_DAYS
HEATING TOTAL    1125              1085      40      887
 SINCE 7/1       2497              2453      44     2176
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        660               539     121      802
.......................................................

WIND (MPH)
AVERAGE WIND SPEED              8.9
HIGHEST WIND SPEED/DIRECTION    35/260
HIGHEST GUST SPEED/DIRECTION    46/270    DATE  12/31

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
NUMBER OF DAYS FAIR            0
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY         25

AVERAGE RH (PERCENT)     75

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               1
HEAVY RAIN                0     RAIN                       4
LIGHT RAIN               10     FREEZING RAIN              1
LT FREEZING RAIN          5     HAIL                       0
HEAVY SNOW                1     SNOW                       8
LIGHT SNOW               20     SLEET                      2
FOG                      24     FOG W/VIS <= 1/4 MILE      3
HAZE                     15

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

&&

...ACTIVE WEATHER PATTERN WITH COLD AND SNOW THEN RAIN AND
FLOODING...

THERE WAS A VERY ACTIVE WEATHER PATTERN THIS MONTH OF DECEMBER. IT
ALL STARTED WITH A BRIEF PERIOD OF WARM WEATHER THE FIRST WEEK OF
DECEMBER...WITH TEMPERATURES BRIEFLY TOUCHING THE LOW 60`S ON
DECEMBER 5TH. A COLD FRONT MOVED THROUGH THE REGION ON THE 6TH AND
SUCCESSIVE ROUNDS OF COLDER AIR PLUNGED SOUTHWARD FROM CANADA INTO
THE UNITED STATES INCLUDING ACROSS THE EASTERN GREAT LAKES REGION
THROUGH THE MIDDLE TO LATTER HALF OF DECEMBER...WHICH IN TURN LED TO
OVERALL COLDER THAN AVERAGE TEMPERATURES. THIS COLD WAS ALSO
ACCOMPANIED BY SEVERAL SYNOPTIC AND LAKE EFFECT SNOW EVENTS.

THE COLDER AIR SPILLING ACROSS THE REGION FROM DECEMBER 10TH THROUGH
THE 11TH WOULD BE RESPONSIBLE FOR THE FIRST OF TWO NOTABLE LAKE
EFFECT SNOW EVENTS OFF LAKE ERIE. THE FIRST EVENT DROPPED SEVERAL FEET
OF SNOW SOUTH OF BUFFALO AND BATAVIA...WITH UP TO A HALF A FOOT OF
SNOW ACROSS SOUTHWEST METRO ROCHESTER. A SECOND EVENT ON THE 12TH
AND 13TH CAME ON THE HEELS OF OUR FIRST MAJOR LAKE EFFECT SNOW
EVENT. HOWEVER THIS TIME SNOW WAS NOT AS GREAT...AND THE BAND WAS A
LITTLE FARTHER NORTH SPREADING SEVERAL INCHES OF SNOW ACROSS THE
METRO ROCHESTER AREA OFF LAKE ERIE. FOLLOWING THIS PERIOD OF COLD
AND SNOWY WEATHER...A BRIEF WARM-UP OCCURRED ALONG WITH COPIOUS
AMOUNTS OF PRECIPITATION. THE COMBINATION OF RAIN ON TOP OF THE
RECENT SNOWFALL CAUSED AREA CREEKS AND RIVERS TO SPILL OVER THEIR
BANKS...WHILE MANY OF THEIR TRIBUTARIES ALSO PRODUCED FIELD
FLOODING...FLOODED BASEMENTS AND CLOSED ROADWAYS. HOWEVER...THE WARM
AND WET WEATHER WAS SHORT LIVED AND ON THE 24TH OF DECEMBER A COLD
FRONT WOULD BRING BUFFALO BACK INTO A WINTER WONDER LAND.

DECEMBER`S AVERAGE TEMPERATURE WAS 28.5F DEGREES...WHICH WAS 1.5
DEGREES BELOW NORMAL AND WAS THE 2ND STRAIGHT MONTH OF BELOW AVERAGE
TEMPERATURES. THERE WAS ONE RECORD LOW THIS MONTH...WHEN THE
TEMPERATURE DROPPED TO -4F...BREAKING THE OLD RECORD OF -3 SET BACK
IN 1919. DECEMBERS TWO DAYS OF ZERO OR LOWER MINIMUM TEMPERATURES
WERE THE FIRST SUCH OCCURRENCE IN THE MONTH OF DECEMBER SINCE
2004.

THERE WAS 2.99 INCHES OF PRECIPITATION THIS MONTH WHICH FELL ABOUT A
THIRD OF AN INCH SHORT OF NORMAL. WHILE THERE WERE SEVERAL WET DAYS
(21ST AND 22ND) THERE WERE NO RECORD PRECIPITATION EVENTS THIS
MONTH.

SNOW FOR THE MONTH OF DECEMBER CAME IN AT 22.5 INCHES...JUST A TAD
BIT(0.7 INCHES)BELOW NORMAL. SEVERAL PERIODS OF WARMTH ALLOWED FOR
EACH SNOWPACK TO MELT...THOUGH THERE WERE 19 DAYS WITH AT LEAST AN
INCH OF SNOW ON THE GROUND WHICH IS 3 DAYS MORE THAN NORMAL.

WIND SPEED THIS MONTH AVERAGED 8.9 MPH WHICH IS MORE THAN 2 MPH
BELOW NORMAL. THE SUN DID NOT MAKE MUCH OF AN APPEARANCE THIS
MONTH...WHICH IS TYPICAL IN DECEMBER...WITH ONLY 21 PERCENT OF
POSSIBLE SUNSHINE WHICH IS 6 PERCENT BELOW NORMAL. THERE WERE 28
DAYS THIS MONTH MOSTLY TO COMPLETELY CLOUDY.

OVERALL THE MONTH OF DECEMBER WILL BE REMEMBER FOR ITS IMPRESSIVE
LAKE EFFECT SNOWS AND THE FLOODING OF AREA CREEKS AND RIVERS.

&&

REYNOLDS

$$







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