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CXUS51 KGYX 070330
CLSPWM

CLIMATE DATA FOR THE SPRING OF 2013 IN PORTLAND
NATIONAL WEATHER SERVICE GRAY ME
1130 PM EDT THU JUN 6 2013

HERE IS A SEASONAL SUMMARY FOR THE METEOROLOGICAL SPRING
(MARCH...APRIL...MAY) OF 2013 FOR PORTLAND, MAINE.

THE METEOROLOGICAL SPRING OF 2013 IN PORTLAND WAS SLIGHTLY WARMER
AND MUCH DRIER THAN NORMAL.

THE AVERAGE TEMPERATURE FOR THE METEOROLOGICAL SPRING (MARCH,
APRIL AND MAY) WAS 44.4 DEGREES. THIS WAS 0.6 DEGREES ABOVE
NORMAL AND THE 16TH WARMEST SPRING IN THE PAST 73 YEARS AT
THE PORTLAND JETPORT. THE WARMEST SPRING ON RECORD IS 48.9
DEGREES SET IN 2010. THE SECOND WARMEST SPRING WAS JUST LAST
YEAR WITH AN AVERAGE TEMPERATURE OF 48.3 DEGREES. THE COLDEST
SPRING WAS IN 1956 WITH AN AVERAGE TEMPERATURE OF 37.9
DEGREES.

ALL THREE MONTHS WERE ABOVE NORMAL...MOST NOTABLY MARCH BY
1.3 DEGREES. APRIL AND MAY WERE JUST BARELY ABOVE NORMAL BY
0.2 DEGREES EACH MONTH.

TEMPERATURES RANGED FROM A LOW OF 13 DEGREES ON MARCH 8TH TO A
HIGH OF 92 ON MAY 31ST...THE FIRST 90 DEGREE DAY OF THE YEAR.
THIS WAS THE FIRST 90 DEGREE DAY SINCE AUGUST 3 OF 2012...A
PERIOD OF NINE MONTHS AND 28 DAYS. THE 92 DEGREE HIGH WAS
TWO DEGREES SHORT OF THE RECORD 94 DEGREES SET IN 1987.

THE 92 DEGREE READING ON MAY 31ST THIS YEAR TIED FOUR OTHER
DATES AS THE 2ND WARMEST TEMPERATURE EVER RECORDED AT THE PORTLAND
JETPORT IN THE MONTH OF MAY. THE WARMEST TEMPERATURE EVER IN MAY
WAS THE 94 DEGREES ON MAY 31, 1987. THIS WAS THE 16TH TIME
PORTLAND REACHED 90 DEGREES IN THE MONTH OF MAY AT THE JETPORT.

PORTLAND RECORDED JUST 8.37 INCHES OF PRECIPITATION (COMBINED
RAINFALL PLUS MELTED SNOWFALL) THIS SPRING. THIS WAS 4.20
INCHES BELOW NORMAL AND 114TH WETTEST (OR THE 30TH DRIEST) SPRING
IN THE PAST 143 YEARS.

BOTH MARCH AND APRIL WERE MUCH DRIER THAN NORMAL...BY MORE THAN
TWO INCHES EACH MONTH. MARCH, WITH JUST 1.69 INCHES, WAS 2.55
INCHES BELOW NORMAL AND APRIL, WITH JUST 2.11 INCHES, WAS 2.21
INCHES BELOW NORMAL. ONLY MAY, WITH 4.57 INCHES OF RAIN, WAS
WETTER THAN NORMAL AND BY JUST OVER HALF AN INCH (0.56 INCHES).

THERE WAS ONLY ONE CALENDAR DAY WITH OVER AN INCH OF PRECIPITATION
AND OCCURRED ON MAY 24TH WITH 1.11 INCHES OF RAIN. THIS WAS DURING
A PERIOD OF EIGHT CONSECUTIVE DAYS OF RAIN FROM MAY 19TH THROUGH
THE 26TH THAT SAW A TOTAL OF 3.15 INCHES OF RAIN. THAT WAS NEARLY
AS MUCH AS ALL OF THE PRECIPITATION, 3.80 INCHES, THAT FELL IN
MARCH AND APRIL COMBINED.

PORTLAND MEASURED 13.4 INCHES OF SNOW THIS SPRING. THIS WAS 2.1
INCHES BELOW NORMAL AND WAS THE 65TH SNOWIEST SPRING IN THE PAST
132 YEARS. THE SNOWIEST SPRING ON RECORD WAS 61.5 INCHES OF SNOW
IN 1906 AND THE LEAST SNOWIEST WAS JUST A TRACE OF SNOW IN 1910
AND AGAIN IN 1921.

MOST OF THE SNOW, 13.2 INCHES, FELL IN MARCH. APRIL HAD JUST
0.2 INCHES AND MAY SAW NO SNOW. THE BIGGEST CALENDAR DAY SNOWFALL
WAS 8.7 INCHES ON MARCH 19TH WHICH WAS PART OF A 9.6 INCH SNOW
EVENT ON MARCH 19TH AND 20TH. THE NEXT BIGGEST SNOW EVENT WAS
2.0 INCHES ON MARCH 2ND AND 3RD FOLLOWED BY 1.6 INCHES ON MARCH
7TH AND 8TH.

HERE IS A TABULAR SUMMARY OF THE SPRING OF 2013 IN PORTLAND MAINE.

                         MAR        APR        MAY        SPRING 2013
...TEMPERATURES...

AVERAGE TEMPERATURE      34.8       44.2       54.1          44.4
30 YEAR NORMAL           33.5       44.0       53.9          43.8
DEPARTURE            PLUS 1.3   PLUS 0.2   PLUS 0.2      PLUS 0.6
RANK (1 THROUGH 73)      17TH       30TH       32ND          16TH
     (1 = WARMEST)     (TIED)

HIGHEST TEMPERATURE        56         65         92            92 - MAY 31ST
LOWEST TEMPERATURE         13         25         32            13 - MARCH 8TH

...PRECIPITATION...

MEASURED (INCHES)        1.69       2.11       4.57          8.37
30 YEAR NORMAL           4.24       4.32       4.01         12.57
DEPARTURE          MINUS 2.55 MINUS 2.21  PLUS 0.56    MINUS 4.20
RANK (1 THROUGH 143)    127TH      120TH       38TH         114TH
     (1 = WETTEST)     (TIED)

GREATEST RAINFALL
IN ANY 24-HOUR PERIOD    0.69       0.63       1.33          1.33 - MAY 23-24TH

...SNOWFALL DATA...

MEASURED (INCHES)        13.2        0.2        0.0          13.4
30 YEAR NORMAL           12.7        2.8        0.0          15.5
DEPARTURE            PLUS 0.5  MINUS 2.6       NONE     MINUS 2.1
RANK (1 THROUGH 132)     47TH       91ST       23RD          65TH
     (1 = SNOWIEST)    (TIED)                (TIED)

GREATEST SNOWFALL (INCHES)
IN ANY 24-HOUR PERIOD     8.7        0.2        0.0           8.7 - MARCH 19TH

...WIND...

AVERAGE SPEED          10.2 MPH    9.2 MPH    7.7 MPH       9.0 MPH
NORMAL                 10.1 MPH   10.0 MPH    9.0 MPH       9.7 MPH
DEPARTURE             + 0.1 MPH  - 0.8 MPH  - 1.3 MPH     - 0.7 MPH

HIGHEST WIND GUST        40 MPH     39 MPH     37 MPH        40 MPH - MARCH 23RD

...DEGREE DAY DATA...

HEATING DEGREE DAYS       928        618        347          1893
NORMAL                    976        630        353          1960
DEPARTURE           MINUS 244   MINUS 12    MINUS 6      MINUS 67

COOLING DEGREE DAYS         0          0         15            15
NORMAL                      0          0          7             7
DEPARTURE                NONE       NONE     PLUS 8        PLUS 8

...SEA LEVEL PRESSURE...

HIGHEST (IN INCHES)       30.45      30.82     30.24         30.82 - APRIL 22ND
LOWEST (IN INCHES)        29.51      29.47     29.59         29.47 - APRIL 1ST

                           SPRING 2013   NORMAL     DEPARTURE
...NUMBER OF DAYS WITH...

MAX TEMPERATURE 90 OR WARMER      1         0.3      PLUS 0.7
MAX TEMPERATURE 32 OR COLDER      0         3.9     MINUS 3.9
MIN TEMPERATURE 32 OR COLDER     39        34.9      PLUS 4.1
MIN TEMPERATURE  0 OR COLDER      0         0.3     MINUS 0.3

THUNDERSTORMS                     1         2.8     MINUS 1.8
DENSE FOG (VSBY < 1/4 MI)         7        11.3     MINUS 4.3

PCPN 0.01 INCH OR MORE           34        35.5     MINUS 1.5
PCPN 1.00 INCH OR MORE            1         2.7     MINUS 1.7
SNOWFALL TRACE OR MORE           13         6.2      PLUS 6.8
SNOWFALL 1 INCH OR MORE           3         3.7     MINUS 0.7
SNOWFALL 6 INCHES OR MORE         1         N/A

WARMEST SPRING .......... 48.9 DEGREES IN 2010
COLDEST SPRING .......... 37.9 DEGREES IN 1956
WETTEST SPRING .......... 22.55 INCHES IN 1983
DRIEST SPRING ...........  4.23 INCHES IN 1965
SNOWIEST SPRING ......... 61.5 INCHES IN 1906
LEAST SNOWIEST SPRING ... TRACE IN 1910 AND 1921

NOTE...THE METEOROLOGICAL SPRING REFERS TO MARCH - APRIL - MAY
TOTALS ONLY.

HERE IS A LIST OF DAILY RECORDS SET OR TIED DURING MARCH, APRIL AND MAY
OF 2013...

DATE        RECORD                            PREVIOUS RECORD
MAR 12      40 - WARMEST LOW TEMPERATURE      37 DEGREES IN 1973 & 1985
MAR 19      8.7 - GREATEST DAILY SNOWFALL     4.7 INCHES IN 1971

NO DAILY TEMPERATURE OR PRECIPITATION RECORDS WERE SET OR TIED IN
PORTLAND IN APRIL OR MAY OF THIS YEAR.

HERE IS A LIST OF MONTHLY RECORDS SET OR TIED THIS SPRING IN PORTLAND...

DATE        NEW RECORD                            OLD RECORD
APRIL 22    30.82 INCHES - HIGHEST SEA LEVEL      30.72 INCHES APRIL 12, 1911
                           PRESSURE IN APRIL

$$

SJC