Climatological Report (Monthly)
Issued by NWS Buffalo, NY

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CXUS51 KBUF 042226
CLMROC

CLIMATE REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
852 AM EST THU JAN 1 2015

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

...THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2014

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            57   12/24                         62  12/05
LOWEST             16   12/31                         -4  12/17
AVG. MAXIMUM     39.9              36.5     3.4     35.6
AVG. MINIMUM     28.9              23.5     5.4     21.5
MEAN             34.4              30.0     4.4     28.5
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      6              10.4    -4.4       14
DAYS MIN <= 32     23              24.9    -1.9       28
DAYS MIN <= 0       0               0.4    -0.4        2

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.17   1878
 MINIMUM         0.62   1958
TOTALS           2.31              2.63   -0.32     2.99
DAYS >= .01        16                                 23
DAYS >= .10         7                                  8
DAYS >= .50         1                                  1
DAYS >= 1.00        0                                  0
GREATEST
 24 HR. TOTAL    0.79   12/10

SNOWFALL (INCHES)
RECORDS
 TOTAL           46.5   2010
TOTALS           16.6              21.8    -5.2     22.5
SINCE 7/1        25.7              29.2    -3.5     36.0
SNOWDEPTH AVG.      1                 3      -2        2
DAYS >= 1.0         4               6.3    -2.3        7
GREATEST
 SNOW DEPTH        11   12/11                          8  12/15
 24 HR TOTAL      8.7   12/10

DEGREE_DAYS
HEATING TOTAL     940              1085    -145     1125
 SINCE 7/1       2220              2453    -233     2497
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        542               539       3      660
.....................................................

WIND (MPH)
AVERAGE WIND SPEED              9.5
HIGHEST WIND SPEED/DIRECTION    41/250
HIGHEST GUST SPEED/DIRECTION    53/250    DATE  12/25

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.90
NUMBER OF DAYS FAIR            0
NUMBER OF DAYS PC              5
NUMBER OF DAYS CLOUDY         26

AVERAGE RH (PERCENT)     75

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       4
LIGHT RAIN               17     FREEZING RAIN              0
LT FREEZING RAIN          2     HAIL                       0
HEAVY SNOW                0     SNOW                       6
LIGHT SNOW               13     SLEET                      0
FOG                      18     FOG W/VIS <= 1/4 MILE      0
HAZE                      3

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

&&

DECEMBER STARTED IN TYPICAL FASHION WITH EARLY WINTERS COLDNESS AND
SOME SNOW. BY THE CLOSE OF THE SECOND WEEK...A PATTERN CHANGE
BROUGHT WARM PACIFIC AIR ACROSS THE GREAT LAKES AND THIS FLOW KEPT
THE REGION VIRTUALLY SNOW-FREE FOR THE REMAINDER OF THE MONTH.

THE AVERAGE TEMPERATURE FOR THE MONTH OF DECEMBER WAS 34.4F
DEGREES...WHICH IS ABOUT FOUR AND A HALF DEGREES ABOVE NORMAL. FOR
THE FIRST TIME IN FOUR DECEMBERS WE DID NOT REACH ABOVE 60F...THOUGH
THE 6 DAYS THAT DID REACH INTO THE 50S WAS THREE MORE THAN NORMAL.
THE COLDEST TEMPERATURE THIS MONTH WAS 16F DEGREES WHICH OCCURRED ON
THE LAST DAY OF DECEMBER....AND THIS WAS THE ONLY MINIMUM
TEMPERATURE IN THE TEENS THIS MONTH. THERE HAVE ONLY BEEN TWO OTHER
DECEMBERS (1923,1877) WITH ONE OR LESS DAYS WITH MINIMUM
TEMPERATURES IN THE TEENS. THERE WAS ONE NEW TEMPERATURE RECORD...ON
THE 24TH A RECORD WARM LOW WAS SET...WITH THE 47F DEGREES BREAKING
THE OLD RECORD OF 46F SET BACK IN 1931.

PRECIPITATION FOR THE MONTH WAS SLIGHTLY BELOW THE NORMAL OF 2.63
INCHES. RAINFALL ACCOUNTED FOR ABOUT HALF OF THE 2.31 INCHES
OF PRECIPITATION THIS MONTH.

SNOWFALL WAS BELOW NORMAL AS WELL FOR DECEMBER. ABOUT HALF OF THE
SNOW FELL ON THE 9TH AND 10TH...WHEN A SYNOPTIC STORM SYSTEM BROUGHT
WIDESPREAD SNOWFALL TO WESTERN NEW YORK. OTHERWISE THERE WERE JUST
MINOR EVENTS OF SOUTHWEST WINDS BRINGING LAKE EFFECT SNOW OFF LAKE
ERIE INLAND TO THE GENESEE VALLEY.

A COLD FRONT CROSSED THE REGION EARLY ON THE 1ST SENDING MIDNIGHT
MILD TEMPERATURES IN THE MID 50S DOWN TO THE LOWER 30S BY AFTERNOON.
THROUGH THE FIRST TWO WEEKS A TROUGH OF LOW PRESSURE OVER THE
EASTERN UNITED STATES ALLOWED FOR A COLD CANADIAN AIRMASS TO DROP
SOUTHWARD ACROSS THE GREAT LAKES. HOWEVER CONDITIONS WERE NOT
FAVORABLE FOR LAKE EFFECT SNOW. THERE WAS ONE MAJOR SYNOPTIC STORM
SYSTEM...A CLOSED LOW THAT DROPPED A HALF TO ONE FOOT OF SNOW ACROSS
WESTERN NEW YORK. A FEW LOCALIZED AREAS NEAR THE SHORELINE RECEIVED
LAKE ENHANCED SNOW...WITH UPWARD TO A FOOT AND A HALF OF SNOW
ACCUMULATING. BEHIND THIS SYNOPTIC SYSTEM FREEZING DRIZZLE FELL
THROUGH THE DURATION OF THE WEEKEND...FROM THE 12TH THROUGH THE
14TH. FOR THE REMAINDER OF THE MONTH A ZONAL WEST TO EAST FLOW
DOMINATED...WITH JUST BRIEF INTRUSIONS OF COLDER AIR. AFTER A
RELATIVELY QUIET THIRD WEEK...A CONVECTIVE LINE OF SHOWERS AHEAD OF
A COLD FRONT CROSSED THE REGION CHRISTMAS EVE...BRINGING DAMAGING
WIND GUSTS ACROSS THE NIAGARA FRONTIER...BUT WEAKENING JUST ENOUGH
TO CAUSE VERY LITTLE DAMAGE ACROSS THE GENESEE VALLEY. THE MONTH
ENDED ON A COLD NOTE WITH LIGHT LAKE EFFECT SNOW FALLING THROUGHOUT
THE REGION.

THE LAKE ONTARIO WATER TEMPERATURES HELD STEADY IN THE LOWER 40S AND
UPPER 30S THROUGH THE MONTH. THE PEAK WIND GUST THIS MONTH WAS 53
MPH WHICH OCCURRED ON THE 25TH.

IN ALL A MILD DECEMBER WITH A LACK OF TYPICAL LAKE EFFECT SNOW.

&&

THOMAS

$$





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