Climatological Report (Seasonal)
Issued by NWS Portland, ME

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CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
249 PM EST FRI MAR 3 2017

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

...THE PORTLAND ME CLIMATE SUMMARY FOR THE WINTER SEASON, FROM
12/1/2016 TO 2/28/2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1941 TO 2017 /FOR TEMPERATURES/
CLIMATE RECORD PERIOD 1871 TO 2017 /FOR PRECIPITATION/
CLIMATE RECORD PERIOD 1882 TO 2017 /FOR SNOWFALL/

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              71   12/06/2001
                        12/07/1998
 LOW              -39   02/16/1943
HIGHEST            55   02/19        59      -4       62  12/25
LOWEST             -3   12/16       -10       7      -10  02/15
                                                          02/14
AVG. MAXIMUM     37.3              34.3     3.0     40.1
AVG. MINIMUM     20.5              16.8     3.7     22.3
MEAN             28.9              25.6     3.3     31.2
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     22              37.0   -15.0       22
DAYS MIN <= 32     79              82.9    -3.9       75
DAYS MIN <= 0       1               7.6    -6.6        4

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        20.49   1935
 MINIMUM         4.12   1872
TOTALS          13.51             10.65    2.86    12.88
DAILY AVG.       0.15              0.12    0.03     0.14
DAYS >= .01        39              32.3     6.7       33
DAYS >= .10        27              19.5     7.5       25
DAYS >= .50         9               7.0     2.0       11
DAYS >= 1.00        5               2.7     2.3        2
GREATEST
 24 HR. TOTAL    1.84   12/29 TO 12/30

SNOWFALL (INCHES)
RECORDS
 TOTAL          107.6   1971
TOTALS           65.7              44.5    21.2     41.0
SINCE 7/1        66.2              46.4    19.8     41.0
SNOWDEPTH AVG.      3
DAYS >= TRACE      34              20.1    13.9       23
DAYS >= 1.0        14              11.5     2.5        9
GREATEST
 SNOW DEPTH        20   02/13
 24 HR TOTAL     15.1   02/12 TO 02/13

DEGREE_DAYS
HEATING TOTAL    3226              3550    -324     3045
 SINCE 7/1       4478              5042    -564     4291
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.9
HIGHEST WIND SPEED/DIRECTION    32/290    DATE  12/16
HIGHEST GUST SPEED/DIRECTION    43/290    DATE  12/15

SKY COVER
AVERAGE SKY COVER           0.50

AVERAGE RH (PERCENT)     67

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     HEAVY RAIN                 2
RAIN                      6     LIGHT RAIN                21
FREEZING RAIN             2     LT FREEZING RAIN           6
HEAVY SNOW                4     SNOW                      16
LIGHT SNOW               29     FOG                       43
FOG W/VIS <= 1/4 MILE    10     HAZE                      13

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

&&

METEOROLOGICAL WINTER STARTED OUT ON A WARM NOTE AS THE FIRST TWO
DAYS OF DECEMBER SAW THE TEMPERATURE HIT 50 DEGREES. A FAIRLY ACTIVE
WEATHER PATTERN DEVELOPED WHICH BROUGHT A NEW STORM SYSTEM TOWARD
THE AREA EVERY FEW DAYS OFTEN RESULTING IN SNOWFALL. EACH NEW SYSTEM
BROUGHT WITH IT COLDER AND COLDER AIR, WITH THE COLD REACHING ITS
MOST BRUTAL EXTENT ON DECEMBER 16. THE HIGH TEMPERATURE OF 9 DEGREES
ON DECEMBER 16 WAS THE COLDEST DECEMBER HIGH TEMPERATURE IN MORE
THAN 30 YEARS. THE LOW OF -3 DEGREES WAS THE EARLIEST SUBZERO
TEMPERATURE IN PORTLAND SINCE 1989. THE BRUTAL COLD EASED UP BY
DECEMBER 21, WITH SOME WARMER WEATHER ARRIVING AGAIN AFTER
CHRISTMAS. AN INTENSIFYING STORM SYSTEM ON THE 29TH BROUGHT SNOW
CHANGING TO RAIN. RAIN CHANGED BACK TO SNOW THAT NIGHT AND WAS
ACCOMPANIED BY THUNDER AND LIGHTNING. A TOTAL OF 7.7 INCHES OF SNOW
FELL, MOST OF THAT IN JUST A FEW HOURS THAT NIGHT. AFTER THE STORM
ENDED, MILD WEATHER CONTINUED RIGHT INTO THE NEW YEAR. THERE WAS A
BRIEF SHOT OF COLDER AIR IN THE SECOND WEEK OF JANUARY, BUT THE WARM
WEATHER RETURNED AGAIN. PORTLAND EXPERIENCED 3 STRAIGHT DAYS IN THE
50S FROM THE 11TH THROUGH 13TH, HELPING TO ERADICATED THE EARLY
SEASON SNOW COVER. ALTHOUGH THERE WERE A FEW MORE LIGHT SNOWS, THE
GENERALLY WARM WEATHER PERSISTED INTO EARLY FEBRUARY. THIS BEGAN TO
CHANGE ON FEBRUARY 7 WHEN PORTLAND SAW ANOTHER STORM BRING 4 INCHES
OF SNOWFALL. THIS WAS JUST THE FIRST OF SEVERAL SNOWSTORMS WHICH
BROUGHT MORE THAN 39 INCHES OF SNOWFALL IN A 10 DAY PERIOD ALONG
WITH SOME COLD TEMPERATURES. THE SNOWY WEATHER PATTERN FINALLY CAME
TO AN END ON THE 16TH AND WARMER WEATHER SOON FOLLOWED. THE LAST
HALF OF FEBRUARY WAS NOTABLE FOR ITS PERSISTENT WARMTH, INCLUDING 5
MORE DAYS ABOVE 50 DEGREES.

THE AVERAGE TEMPERATURE FOR THE SEASON WAS 28.9 DEGREES WHICH WAS
3.3 DEGREES ABOVE NORMAL AND THE 6TH WARMEST WINTER SEASON ON
RECORD. THE WARMEST WINTER WAS IN 2001-02 WHEN THE AVERAGE
TEMPERATURE WAS 31.3 DEGREES. THE COLDEST WAS ONLY 17.9 DEGREES IN
1970-71. THE FOLLOWING TABLE LISTS THE WARMEST WINTER SEASONS ON
RECORD AT PORTLAND.

WARMEST WINTER AVERAGE TEMPERATURE (SINCE 1940)...
RANK  TEMP  SEASON
1     31.3  2001-02
2     31.2  2015-16
3     30.3  2011-12
4     29.3  1997-98
5     29.0  1990-91
6     28.9  2016-17 <===
      28.9  1996-97
8     28.7  1952-53
9     28.5  2012-13
10    28.4  2009-10

A TOTAL OF 13.51 INCHES OF PRECIPITATION FELL WHICH WAS 2.86 INCHES
ABOVE NORMAL. THE HEAVIEST PRECIPITATION WAS ON DECEMBER 29 AND 30
WHEN 1.84 INCHES OF RAIN AND MELTED SNOW FELL. THE WETTEST WINTER
WAS IN 1934-35 WHEN 20.49 INCHES WAS RECORDED. THE DRIEST WAS 1871-
72 WHEN ONLY 4.12 INCHES WAS MEASURED.

THERE WAS A TOTAL OF 65.7 INCHES OF SNOWFALL WHICH WAS 21.2 INCHES
ABOVE NORMAL. ALMOST HALF OF THAT SNOW FELL DURING ONE PARTICULARLY
SNOWY PERIOD WHEN 29.6 INCHES WAS MEASURED FROM FEBRUARY 9 THROUGH
13. THE GREATEST IN 24 HOURS WAS 15.1 INCHES ON FEBRUARY 12 AND 13.
THE SNOWIEST WINTER ON RECORD WAS IN 1970-71 WHEN 107.6 INCHES FELL.
THE LEAST SNOWY WAS 1936-37 WHEN ONLY 9.5 INCHES WAS RECORDED.

THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN WINTER 2016-17...
DATE    RECORD                               PREVIOUS
DEC 16  9    - COLDEST HIGH TEMPERATURE      10 IN 1951
JAN 11  54   - WARMEST HIGH TEMPERATURE      54 IN 1983 /TIED/
JAN 12  39   - WARMEST LOW TEMPERATURE       35 IN 2014 AND 1956
JAN 12  45   - WARMEST AVERAGE TEMPERATURE   43 IN 2014
JAN 13  52   - WARMEST HIGH TEMPERATURE      48 IN 1995 AND 1972
JAN 21  36   - WARMEST LOW TEMPERATURE       36 IN 1995 /TIED/
JAN 22  5    - SMALLEST TEMPERATURE RANGE    5 IN 1960 /TIED/
JAN 23  3    - SMALLEST TEMPERATURE RANGE    5 IN 1999
FEB 13  7    - SMALLEST TEMPERATURE RANGE    8 IN 1977
FEB 24  37   - WARMEST LOW TEMPERATURE       37 IN 1985 /TIED/
FEB 24  45   - WARMEST AVERAGE TEMPERATURE   44 IN 2000

$$

KIMBLE



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