Climatological Report (Monthly)
Issued by NWS Caribou, ME

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CXUS51 KCAR 040917 RRA
CLMBGR

CLIMATE REPORT
NATIONAL WEATHER SERVICE CARIBOU, ME
410 AM EST THU JAN 4 2018

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

...THE BANGOR ME CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1925 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              65   12/07/1998
                        12/04/1982
 LOW              -27   12/16/1943
HIGHEST            54   12/06        MM      MM       49  12/27
LOWEST            -24   12/31        MM      MM      -14  12/16
AVG. MAXIMUM     27.6              33.7    -6.1     32.2
AVG. MINIMUM      8.6              15.5    -6.9     12.3
MEAN             18.1              24.6    -6.5     22.3
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     14              13.4     0.6       15
DAYS MIN <= 32     31              29.1     1.9       30
DAYS MIN <= 0       9               3.0     6.0        5

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        10.14   1969
 MINIMUM         0.93   1955
TOTALS           3.83                      0.35
DAILY AVG.       0.12              0.11    0.01     0.12
DAYS >= .01        13              12.0     1.0       15
DAYS >= .10         9               6.8     2.2        9
DAYS >= .50         3               2.1     0.9        2
DAYS >= 1.00        0               0.7    -0.7        0
GREATEST
 24 HR. TOTAL    0.77   12/06 TO 12/06           12/29 TO 12/30
                                                          12/30 TO 12/30
                                                          12/30 TO 12/30

SNOWFALL (INCHES)
RECORDS
 TOTAL           50.9   1927
TOTALS           27.7              14.4    13.3     18.4
SINCE 7/1        27.7              16.8    10.9     19.9
SNOWDEPTH AVG.      7                 4       3        2
DAYS >= 1.0         6               4.0     2.0        6
GREATEST
 SNOW DEPTH        16   12/26                          7  12/18
 24 HR TOTAL     12.2   12/25 TO 12/25           12/30 TO 12/30
                                                          12/30 TO 12/30
                                                          12/30 TO 12/30

DEGREE_DAYS
HEATING TOTAL    1447              1252     195     1319
 SINCE 7/1       2706              2921    -215     2738
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        368               318      50      448
.................................................

WIND (MPH)
AVERAGE WIND SPEED              6.2
HIGHEST WIND SPEED/DIRECTION    32/180    DATE  12/06
HIGHEST GUST SPEED/DIRECTION    46/180    DATE  12/06

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            5
NUMBER OF DAYS PC             15
NUMBER OF DAYS CLOUDY         11

AVERAGE RH (PERCENT)     75

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       2
LIGHT RAIN                5     FREEZING RAIN              0
LT FREEZING RAIN          3     HAIL                       0
HEAVY SNOW                1     SNOW                       6
LIGHT SNOW               13     SLEET                      2
FOG                      16     FOG W/VIS <= 1/4 MILE      0
HAZE                      1

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.
---------------------------------------------------------------------
..NORTHERN AND EASTERN MONTHLY CLIMATE NARRATIVE...

DECEMBER 2017 FINISHED WITH WELL BELOW AVERAGE TEMPERATURES.
PRECIPITATION RANGED FROM 75 TO 125 PERCENT OF NORMAL ACROSS THE
REGION WITH THE DRIEST CONDITIONS ALONG THE WASHINGTON COUNTY COAST.

TEMPERATURES ACROSS THE REGION AS A WHOLE AVERAGED FROM 4 TO 7.5
DEGREES BLOW AVERAGE. THE MONTH GOT OFF TO A MILD START WITH ABOVE
AVERAGE TEMPERATURES ON THE FIRST 9 DAYS OF THE MONTH.
TEMPERATURES THE REMAINDER OF THE MONTH WERE BELOW TO AT TIMES WELL
BELOW AVERAGE. IT WAS THE COLDEST DECEMBER AT CARIBOU SINCE 2013. AT
HOULTON IT TIED FOR THE COLDEST DECEMBER SINCE 2013, BUT AT BANGOR
IT WAS THE COLDEST DECEMBER SINCE 1989.

TEMPERATURES WERE QUITE COLD AT THE END OF THE MONTH WITH LOWS OF 21
BELOW AT BANGOR ON THE 30TH AND 24 BELOW ON NEW YEARS EVE, WHICH
SMASHED THE PREVIOUS RECORD OF 16 BELOW SET IN 2013. THE HIGH OF -1F
AT BANGOR ON THE 28TH WAS THE LOWEST HIGH TEMPERATURE EVER OBSERVED
ON THAT DATE, AND WAS ALSO THE FIRST TIME THERE WAS A SUB ZERO HIGH
AT BANGOR SINCE JANUARY 2, 2014. THE LAST 4 DAYS OF THE MONTH HAD
HIGH TEMPERATURE OF 5F OR LOWER AT BANGOR, WHICH TIED WITH 1951 AS
THE 2ND MOST NUMBER OF CONSECUTIVE DAYS WITH A HIGH OF 5 DEGREES OR
LOWER AT BANGOR DURING THE MONTH OF DECEMBER.

THE COLDEST MORNINGS WERE ON THE 29TH AND 30TH WHEN LOW TEMPERATURES
IN THE NORTHWEST VALLEYS DROPPED TO 30 BELOW OR LOWER. ON THE 29TH,
BIG BLACK RIVER HAD A LOW OF 33 BELOW AND NINE MILE BRIDGE 30 BELOW.
ON THE 30TH, BIG BLACK HAD A LOW OF 33 BELOW, AND ESTCOURT STATION
AND NINE MILE BRIDGE BOTH OBSERVED LOWS OF 30 BELOW.

A TOTAL OF 34.2 INCHES OF SNOW WAS OBSERVED AT CARIBOU, WHICH WAS
11.3 INCHES ABOVE AVERAGE. A TOTAL OF 27.7 INCHES OF SNOW WAS
OBSERVED AT BANGOR, WHICH WAS 12.7 INCHES ABOVE AVERAGE.

SNOWPACK AT THE START OF THE MONTH RANGED FROM 2 TO 4 INCHES IN THE
SAINT JOHN VALLEY WITH 4 TO 8 INCHES ACROSS THE NORTH WOODS. THERE
WAS NO SNOW COVER FROM CARIBOU SOUTH TO THE DOWNEAST COAST. BY THE
END OF THE MONTH, THE SNOW DEPTH RANGED FROM 15 TO 20 INCHES ACROSS
MOST OF THE REGION, WITH 20 T0 30 INCHES ACROSS THE NORTH WOODS,
WITH 6 INCHES OR LESS ACROSS COASTAL WASHINGTON COUNTY.

THE OUTLOOK FOR JANUARY FROM THE CLIMATE PREDICTION CENTER CALLS FOR
AN INCREASED LIKELIHOOD OF BELOW AVERAGE TEMPERATURES. THERE ARE NO
STRONG SIGNALS THAT WOULD POINT TOWARD AN UNUSUALLY WET (SNOWY) OR
DRY MONTH.

THE AVERAGE HIGH TEMPERATURES IN JANUARY RANGE FROM THE TEENS IN THE
SAINT JOHN VALLEY TO THE MID TO UPPER 20S IN THE GREATER BANGOR
REGION. THE AVERAGE LOWS RANGE FROM A LITTLE BELOW ZERO IN THE SAINT
JOHN VALLEY TO THE SINGLE DIGITS IN BANGOR. THE AVERAGE SNOWFALL AT
CARIBOU IS 25.2" AND AT BANGOR IS 19.2".

$$

CB/VJN



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