Climatological Report (Monthly)
Issued by NWS Portland, ME

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CLMCON

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CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
458 PM EDT MON MAY 1 2017

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

...THE CONCORD NH CLIMATE SUMMARY FOR THE MONTH OF APRIL 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1868 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              95   04/19/1976
 LOW                4   04/05/2016
HIGHEST            87   04/16        82       5       80  04/21
                        04/11
LOWEST             23   04/03        20       3        4  04/05
AVG. MAXIMUM     61.2              57.4     3.8     58.1
AVG. MINIMUM     37.6              32.7     4.9     29.6
MEAN             49.4              45.1     4.3     43.8
DAYS MAX >= 90      0               0.2    -0.2        0
DAYS MAX <= 32      0               0.2    -0.2        1
DAYS MIN <= 32      9              15.0    -6.0       19
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         7.74   1904
 MINIMUM         0.42   1941
TOTALS           4.23              3.41    0.82     1.65
DAILY AVG.       0.14              0.11    0.03     0.05
DAYS >= .01        11              11.8    -0.8        9
DAYS >= .10         8               7.1     0.9        6
DAYS >= .50         5               2.1     2.9        1
DAYS >= 1.00        0               0.7    -0.7        0
GREATEST
 24 HR. TOTAL    0.86   04/06

SNOWFALL (INCHES)
RECORDS
 TOTAL           35.0   1874
TOTALS            6.9               2.8     4.1      2.7
SINCE 7/1        86.3              61.4    24.9     29.7
SNOWDEPTH AVG.      2
DAYS >= TRACE       1               1.2    -0.2        3
DAYS >= 1.0         1               0.6     0.4        1
GREATEST
 SNOW DEPTH        16   04/01
 24 HR TOTAL      6.9   04/01

DEGREE_DAYS
HEATING TOTAL     470               600    -130      626
 SINCE 7/1       6072              6847    -775     5757
COOLING TOTAL       8                 2       6        0
 SINCE 1/1          8                 2       6        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.4
HIGHEST WIND SPEED/DIRECTION    29/300    DATE  04/08
HIGHEST GUST SPEED/DIRECTION    41/320    DATE  04/08

SKY COVER
AVERAGE SKY COVER           0.50

AVERAGE RH (PERCENT)     67

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     HEAVY RAIN                 3
RAIN                      6     LIGHT RAIN                13
FREEZING RAIN             0     LT FREEZING RAIN           0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW                2     FOG                       14
FOG W/VIS <= 1/4 MILE     0     HAZE                       0

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

&&

AFTER A CONSISTENTLY COOL MARCH, THE COOL WEATHER CONTINUED INTO THE
FIRST PART OF APRIL. A SIGNIFICANT SNOWSTORM BROUGHT MORE THAN 12
INCHES OF SNOW FROM MARCH 31 INTO THE DAY ON APRIL 1. RATHER THAN
BEING A SIGN OF A COLD APRIL TO COME, IT WAS JUST NATURE`S IDEA OF A
PRANK OR THE LAST GASPS OF WINTER. AFTER A FEW COOL, WET DAYS THE
WEATHER PATTERN BEGAN TO SHIFT AND WARMER WEATHER ARRIVED. CONCORD
SAW TWO STRAIGHT DAYS IN THE 80S ON APRIL 10 AND 11, ENOUGH TO MELT
THE LAST OF THE WINTER SNOW COVER. A COLD FRONT BROUGHT THE
TEMPERATURE BACK DOWN TO AROUND NORMAL FOR A FEW DAYS, BUT THE
WARMTH RETURNED ON EASTER SUNDAY, APRIL 16, WITH A HIGH TEMPERATURE
OF 87 DEGREES. THE REST OF THE MONTH  WAS A BATTLE BETWEEN BUILDING
WARMTH AND PERIODIC ONSHORE BREEZES FROM THE FRIGID GULF OF MAINE.
WHEN THE WIND CAME FROM THE EAST THE TEMPERATURE OFTEN STRUGGLED TO
REACH 50. WHEN THE WIND CAME FROM THE SOUTHWEST IT WOULD HIT 70 OR
EVEN 80 DEGREES.

THE AVERAGE TEMPERATURE FOR THE MONTH WAS 49.4 DEGREES WHICH WAS 4.3
DEGREES ABOVE NORMAL AND TIED FOR THE 4TH WARMEST APRIL ON RECORD.
THE WARMEST APRIL WAS IN 1941 WHEN THE AVERAGE TEMPERATURE WAS 51.4
DEGREES. THE COLDEST WAS IN 1874 WHEN IT WAS ONLY 37.0 DEGREES. THE
FOLLOWING TABLE LISTS THE WARMEST APRILS ON RECORD AT CONCORD.

WARMEST APRIL AVERAGE TEMPERATURE (SINCE 1868)...
RANK  TEMP  YEAR
1     51.4  1941
2     50.8  1878
3     50.4  1886
4     49.4  2017 <===
      49.4  1921
6     49.1  1945
7     48.7  2010
8     48.6  1889
9     48.5  1880
10    48.4  1915

THERE WERE 9 DAYS THAT TOPPED 70 DEGREES WHILE THE AVERAGE APRIL
WOULD TYPICALLY ONLY SEE 6. THERE WERE 5 DAYS THAT TOPPED 80
DEGREES, TIED FOR THE MOST ON RECORD. AN AVERAGE APRIL WOULD SEE
ONLY 1 DAY HIT 80 DEGREES. THE FOLLOWING TABLES LIST THE APRILS WITH
THE MOST 70 AND 80 DEGREE DAYS RESPECTIVELY.

MOST DAYS REACHING 70 OR 80 DEGREES (SINCE 1868)...
   70 OR HIGHER                | 80 OR HIGHER
RANK  DAYS  YEAR               | DAYS  YEAR
1     12    1870               |  5    2017 <===
2     11    1941               |  5    1976
3     10    1991               |  5    1941
4     10    1957               |  5    1886
5     9     2017 <===          |  5    1870
6     9     1938               |  4    1942
7     9     1886               |  4    1885
8     8     2010 AND 11 OTHERS |  3    2012 AND 16 OTHERS

A TOTAL OF 4.23 INCHES OF PRECIPITATION FELL WHICH WAS 0.82 INCHES
ABOVE NORMAL AND THE WETTEST APRIL SINCE 2011. THE HEAVIEST
PRECIPITATION FELL NEAR THE START OF THE MONTH WHEN MORE THAN 0.8
INCHES FELL ON THE 4TH AND THE 6TH. THE WETTEST APRIL ON RECORD WAS
IN 1904 WHEN 7.44 INCHES WAS MEASURED. THE DRIEST WAS IN 1941 WHEN
ONLY 0.42 INCHES FELL.

THERE WAS 6.9 INCHES OF SNOW WHICH WAS 4.1 INCHES ABOVE NORMAL AND
THE SNOWIEST APRIL SINCE 2007. ALL OF THIS SNOW FELL ON APRIL 1 AS
PART OF A SNOWSTORM WHICH BROUGHT A TOTAL OF MORE THAN 12 INCHES OF
SNOW BEGINNING ON MARCH 31. SNOW IS TYPICALLY INCONSISTENT IN THE
MONTH OF APRIL. THE SNOWIEST APRIL ON RECORD WAS IN 1874 WHEN 35.0
INCHES OF SNOW FELL. MEASURABLE SNOW HAS BEEN OBSERVED IN 69 PERCENT
OF ALL APRILS. AN ADDITIONAL 24 PERCENT OF APRILS HAVE OBSERVED ONLY
A TRACE OF SNOWFALL, MOST RECENTLY IN 2010. THERE HAVE ONLY BEEN 10
YEARS, OR 7 PERCENT, WHICH DID NOT OBSERVE ANY SNOWFALL IN APRIL
INCLUDING MOST RECENTLY IN 2012.

THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN APRIL 2017...
DATE  RECORD                                 PREVIOUS
1     6.9 - GREATEST SNOWFALL                5.7 IN 1993
11    87 - WARMEST HIGH TEMPERATURE          84 IN 1945

$$

KIMBLE



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