Climatological Report (Monthly)
Issued by NWS Portland, ME

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CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
840 PM EDT FRI NOV 3 2017

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

...THE CONCORD NH CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 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              92   10/16/1879
 LOW               10   10/21/1972
                        10/24/1969
HIGHEST            81   10/08        79       2       79  10/17
                        10/04
LOWEST             27   10/17        21       6       25  10/27
AVG. MAXIMUM     69.9              60.5     9.4     62.2
AVG. MINIMUM     44.0              35.8     8.2     39.3
MEAN             56.9              48.2     8.7     50.7
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      4              12.0    -8.0        8
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        14.57   2005
 MINIMUM         0.05   1924
TOTALS           7.91              4.04    3.87     6.26
DAILY AVG.       0.26              0.13    0.13     0.20
DAYS >= .01        10              10.1    -0.1       12
DAYS >= .10         7               6.4     0.6        7
DAYS >= .50         6               2.4     3.6        4
DAYS >= 1.00        4               1.2     2.8        2
GREATEST
 24 HR. TOTAL    3.22   10/24 TO 10/25

SNOWFALL (INCHES)
RECORDS
 TOTAL           23.0   2011
TOTALS            0.0                 T     0.0      0.0
SINCE 7/1         0.0                 T     0.0      0.0
SNOWDEPTH AVG.      0
DAYS >= TRACE       0               0.0     0.0        0
DAYS >= 1.0         0               0.0     0.0        0
GREATEST
 SNOW DEPTH         0
 24 HR TOTAL      0.0

DEGREE_DAYS
HEATING TOTAL     259               524    -265      434
 SINCE 7/1        400               759    -359      548
COOLING TOTAL      14                 2      12        0
 SINCE 1/1        564               452     112      715
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              5.3
HIGHEST WIND SPEED/DIRECTION    31/110    DATE  10/29
HIGHEST GUST SPEED/DIRECTION    50/130    DATE  10/30

SKY COVER
AVERAGE SKY COVER           0.40

AVERAGE RH (PERCENT)     72

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     HEAVY RAIN                 7
RAIN                      6     LIGHT RAIN                12
FREEZING RAIN             0     LT FREEZING RAIN           0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     FOG                       20
FOG W/VIS <= 1/4 MILE     9     HAZE                       1

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

&&

OCTOBER BEGAN WITH A FEW DAYS OF TYPICALLY COOL FALL-LIKE WEATHER,
BUT SOON A WEATHER PATTERN BEGAN TO EMERGE WHICH FAVORED PERSISTENT
WARM WEATHER. A RIDGE OF HIGH PRESSURE OVER THE WESTERN ATLANTIC AND
A PERSISTENT TROUGH IN THE CENTER OF THE UNITED STATES LED TO A
PERSISTENT SOUTH TO SOUTHWESTERLY AIR FLOW ACROSS NEW ENGLAND,
TRANSPORTING WARM AND OFTEN HUMID AIR INTO THE REGION. THIS PATTERN
REMAINED REMARKABLY CONSISTENT THROUGH THE MONTH, THOUGH THERE WERE
A FEW COLD FRONTS WHICH MANAGED TO SNEAK IN AND BRING BRIEFLY COOLER
WEATHER. THE FIRST FREEZE OF THE SEASON CAME ON OCTOBER 13 DURING
ONE OF THOSE BRIEFLY COOLER AIR MASSES. THIS WAS A LITTLE MORE THAN
TWO WEEKS LATER THAN NORMAL AND THE LATEST FIRST DATE OF FALL FREEZE
SINCE 2007. MUCH OF THE MONTH WAS DRY, FITTING IN WITH A SUMMER AND
FALL TREND OF DRIER THAN NORMAL CONDITIONS. HOWEVER, THE LAST WEEK
OF OCTOBER SAW TWO STRONG STORM SYSTEMS BRING HEAVY RAINFALL. THE
FIRST DROPPED MORE THAN 4.5 INCHES OF RAIN ON THE 24TH THRU 26TH,
WHILE THE NEXT ONE BROUGHT WIND ALONG WITH MORE RAIN. ANOTHER 2
INCHES FELL ON THE 29TH AND 30TH ALONG WITH WINDS GUSTING TO 50 MPH.
THE STRONG WINDS CAUSED SIGNIFICANT DAMAGE TO TREES IN THE AREA
RESULTING IN MANY RESIDENTS LOSING POWER FOR HALLOWEEN.

THE AVERAGE TEMPERATURE FOR THE MONTH WAS 56.9 DEGREES WHICH WAS 8.7
DEGREES ABOVE NORMAL AND THE SECOND WARMEST OCTOBER ON RECORD. THE
WARMEST OCTOBER WAS IN 1879 WHEN THE AVERAGE TEMPERATURE WAS 57.6
DEGREES. THE COOLEST WAS IN 1925 WHEN IT WAS ONLY 42.2 DEGREES. THE
FOLLOWING TABLE LISTS THE WARMEST OCTOBERS ON RECORD AT CONCORD.

WARMEST AVERAGE TEMPERATURE IN OCTOBER (SINCE 1868)...
RANK  TEMP  YEAR
1     57.6  1879
2     56.9  2017 <===
3     55.2  1878
      55.2  1947
5     55.0  1920
6     54.2  2007
7     53.9  1938
8     53.8  1963
9     53.6  1882
10    53.3  1900

A TOTAL OF 7.91 INCHES OF RAIN FELL WHICH WAS 3.87 INCHES ABOVE
NORMAL AND THE 5TH WETTEST OCTOBER ON RECORD. MOST OF THE RAIN THIS
MONTH FELL DURING THE FINAL WEEK WHEN TWO STORM SYSTEMS BROUGHT MORE
THAN 7 INCHES OF TOTAL RAINFALL. THE WETTEST OCTOBER ON RECORD WAS
IN 2005 WHEN 14.57 INCHES OF PRECIPITATION FELL. THE DRIEST WAS IN
1924 WHEN ONLY 0.05 INCHES WAS RECORDED. THE FOLLOWING TABLE LISTS
THE WETTEST OCTOBERS ON RECORD AT CONCORD.

MOST PRECIPITATION IN OCTOBER (SINCE 1868)...
RANK  PRECIP  YEAR
1     14.57   2005
2     11.65   1869
3      8.78   1962
4      8.11   1996
5      7.91   2017 <===
6      7.76   1890
7      7.62   1877
8      7.31   1995
9      6.94   2011
       6.94   2006

NO SNOW FELL WHICH IS NORMAL FOR OCTOBER. IN THE 150 YEARS OF
SNOWFALL RECORDS AT CONCORD, MEASURABLE SNOW HAS FALLEN IN ONLY 15
OF THOSE YEARS, MOST RECENTLY IN 2011. AT LEAST A TRACE OF SNOWFALL
HAS BEEN OBSERVED IN AN ADDITIONAL 37 YEARS, MOST RECENTLY IN 2013.
THE SNOWIEST OCTOBER WAS IN 2011 WHEN 23.0 INCHES WAS MEASURED.


THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN OCTOBER 2017...
DATE  RECORD                                PREVIOUS
25    2.65 - GREATEST RAINFALL              2.07 IN 2005

$$

KIMBLE



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