Climatological Report (Monthly)
Issued by NWS Buffalo, NY

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CXUS51 KBUF 061624
CLMROC

CLIMATE REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
755 AM EST SUN JAN 1 2017

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

...THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2016

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            52   12/27                         69  12/14
                        12/26
LOWEST              9   12/19                         24  12/28
AVG. MAXIMUM     37.2              36.5     0.7     49.3
AVG. MINIMUM     25.5              23.5     2.0     35.1
MEAN             31.3              30.0     1.3     42.2
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      7              10.4    -3.4        0
DAYS MIN <= 32     27              24.9     2.1       10
DAYS MIN <= 0       0               0.4    -0.4        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.17   1878
 MINIMUM         0.62   1958
TOTALS           2.91              2.63    0.28     2.73
DAYS >= .01        25                                 15
DAYS >= .10         8                                  9
DAYS >= .50         1                                  2
DAYS >= 1.00        0                                  0
GREATEST
 24 HR. TOTAL    0.56   12/17 TO 12/18           12/28 TO 12/29
                                                          12/28 TO 12/28
                                                          12/28 TO 12/28

SNOWFALL (INCHES)
RECORDS
 TOTAL           46.5   2010
TOTALS           29.3              21.8     7.5      2.3
SINCE 7/1        45.2              29.2    16.0      3.5
SNOWDEPTH AVG.      3                 3       0        0
DAYS >= 1.0         8               6.3     1.7        1
GREATEST
 SNOW DEPTH        11   12/16                          2  12/29
 24 HR TOTAL     10.6   MM                       12/28 TO 12/28
                                                          12/28 TO 12/28
                                                          12/28 TO 12/28

DEGREE_DAYS
HEATING TOTAL    1035              1085     -50      699
 SINCE 7/1       2013              2453    -440     1739
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        978               539     439      698
.........................................................

WIND (MPH)
AVERAGE WIND SPEED              11.4
HIGHEST WIND SPEED/DIRECTION    33/270
HIGHEST GUST SPEED/DIRECTION    44/270    DATE  12/15

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.80
NUMBER OF DAYS FAIR            0
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY         22

AVERAGE RH (PERCENT)     73

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       7
LIGHT RAIN               12     FREEZING RAIN              0
LT FREEZING RAIN          4     HAIL                       0
HEAVY SNOW                1     SNOW                       9
LIGHT SNOW               22     SLEET                      0
FOG                      24     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.

&&

...WINDY DECEMBER WITH SNOWS...

A PERSISTENT NORTHWEST FLOW THIS MONTH BROUGHT FREQUENT WINDS ACROSS
THE ROCHESTER METRO AREA, WHILE ALSO PRODUCING LAKE EFFECT SNOWS.
THE BULK OF THE WINTRY WEATHER CAME MID-MONTH WHEN A DEEP...BUT NOT
EXTREME ARCTIC AIRMASS DROPPED ACROSS THE REGION WITH WINTER`S
CHILLS, AND PERSISTENT LAKE EFFECT SNOWS.

THE AVERAGE TEMPERATURE THIS MONTH WAS 31.3F WHICH IS JUST OVER A
DEGREE ABOVE NORMAL. THERE WERE 11 DAYS THAT AVERAGED BELOW NORMAL,
CENTERED AROUND THE MIDDLE OF THE MONTH, WITH BOTH THE START AND END
OF THE MONTH SIDING ABOVE NORMAL. THERE WERE NO NEW RECORDS
ESTABLISHED THIS MONTH, AND THE WARMEST DAY WAS THE TWO DAYS AFTER
CHRISTMAS, WHEN BOTH THE 26TH AND 27TH REACHED 52 DEGREES.

PRECIPITATION FOR THE MONTH AVERAGED JUST ABOVE NORMAL, BOTH IN
LIQUID AND IN THE SNOW DEPARTMENT. THE 2.91 INCHES OF PRECIPITATION
WAS A FEW TENTHS OF AN INCH ABOVE NORMAL, WHILE THE SNOWFALL OF 29.3
INCHES WAS 7.5 INCHES ABOVE THE MONTHLY NORMAL. THIS 29.3 INCHES OF
SNOW WAS THE GREATEST MONTHLY TOTAL FOR DECEMBER SINCE 46.5 INCHES
FELL IN 2010. THE WETTEST DAY THIS MONTH WAS ON THE 15TH WHEN 0.53
INCHES OF LIQUID FROM A NEW DAILY RECORD OF 10.6 INCHES OF SNOW
FELL. IN ALL THE PRECIPITATION THIS MONTH PRODUCED LITTLE
HYDROLOGICAL IMPACT ON AREA STREAMS AND CREEKS.

THE FIRST FEW HOURS OF THE MONTH REMAINED VERY MILD WITH DECEMBER
STARTING IN THE UPPER 40S AND LOW 50S ACROSS WESTERN NEW YORK. A
COLD FRONT SWEPT THROUGH THE REGION EARLY, WITH COOLER TEMPERATURES
THE NEXT FEW DAYS AND LAKE EFFECT RAIN AND SNOW SHOWERS. IT WOULD
NOT BE UNTIL A STRONGER COLD FRONT PASSED ON THE 8TH THAT HEAVY AND
PROLONGED BANDS OF LAKE EFFECT SNOW FORMED EAST OF THE EASTERN GREAT
LAKES.

THE FIRST MAJOR LAKE EFFECT EVENT FOR THE MONTH BEGAN IN THE EARLY
MORNING OF THE 8TH AS MUCH COLDER AIR DEEPENED OVER THE EASTERN
GREAT LAKES. THIS EVENT PRIMARILY BLITZED SKI COUNTRY AND THE
SOUTHERN TIER WITH HEAVY SNOW. UPWARDS OF THREE FEET OF SNOW FELL
DURING THIS EVENT. A NORTHWEST FLOW ALSO BROUGHT SEVERAL INCHES OF
SNOW ACROSS THE SOUTHERN SHORES OF LAKE ONTARIO AND INLAND ACROSS
THE GENESEE VALLEY. AS THE EVENT DREW TO A CLOSE, THE BAND OF SNOW
LIFTED NORTHWARD TOWARDS BUFFALO AND THOUGH IN A WEAKER STATE IT DID
DROP 5 TO 6 INCHES OF SNOW ACROSS METRO BUFFALO AREA LATE ON THE
11TH AND THROUGH THE EARLY MORNING HOURS OF THE 12TH. MUCH OF THE
SNOW ENDED BY THE MORNING RUSH HOUR OF MONDAY THE 12TH FOR BUFFALO.

ON THE HEALS OF THE FIRST MAJOR EVENT THIS MONTH, A SECOND EVENT
FORMED OVER WESTERN NEW YORK, THIS AS AN ARCTIC FRONT DROPPED
TOWARDS THE REGION. INITIALLY A SOUTHWEST WIND AHEAD OF THE ARCTIC
AIRMASS BROUGHT LAKE EFFECT SNOW ACROSS METRO BUFFALO AND TOWARDS
THE ROCHESTER AREA ON THE AFTERNOON HOURS OF THE 14TH. AN ARCTIC
FRONT SLOWLY DROPPED SOUTHWARD OVER LAKE ONTARIO DURING THE DAY AND
EVENING HOURS OF THURSDAY THE 15TH. STRONG WINDS OFF LAKE ONTARIO
COMBINED WITH HEAVY SNOW BROUGHT BLIZZARD LIKE CONDITIONS TO THE
SOUTHEASTERN SHORELINE OF LAKE ONTARIO...WITH ROCHESTER RECEIVING A
DAILY RECORD AMOUNT OF SNOW OF 10.6 INCHES. FRIDAY BANDS OF SNOW OFF
BOTH LAKES LIFTED BACK NORTHWARD, WITH LAKE ERIE STILL GOING STRONG
THROUGH FRIDAY AFTERNOON AND PRODUCING ANOTHER 6 INCHES OF SNOW
ACROSS BUFFALO...INCLUDING A SNOWFALL RATE OF 3 INCHES PER HOUR.

BETWEEN THESE TWO EVENTS, AND A LAKE EFFECT EVENT TO CLOSE OUT THE
YEAR A MINOR...BUT IMPACTFUL FREEZING RAIN EVENT GLAZED MUCH OF
WESTERN NEW YORK SATURDAY NIGHT THROUGH SUNDAY MORNING THE 18TH.
THIS GLAZE BROUGHT NUMEROUS ACCIDENTS SATURDAY EVENING THROUGH
SUNDAY MORNING.

FINALLY AS THE YEAR CLOSED OUT, A THIRD LAKE EFFECT EVENT UNFOLDED
ACROSS WESTERN NEW YORK. THIS EVENT OVER THE FINAL DAYS OF THE MONTH
PRODUCED ONE TO TWO FEET OF SNOW ACROSS SOUTHWESTERN NEW YORK STATE,
WHILE CLOSER TO THE METRO AREAS OF BUFFALO AND ROCHESTER JUST
A FEW INCHES OF SNOW FELL.

WINDS WERE GUSTY THROUGH MONTH AVERAGING 11.4 MPH WHICH IS 1.5 MPH
ABOVE NORMAL. THIS IS THE GREATEST POSITIVE DEPARTURE FROM
NORMAL MONTHLY WINDS SINCE FEBRUARY OF 2007.

IN ALL A TYPICAL WINTER MONTH, WITH COLD WINDS AND LAKE EFFECT SNOWS.

&&

THOMAS
$$


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