Climatological Report (Seasonal)
Issued by NWS Portland, ME

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CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
546 PM EST WED DEC 5 2018

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

...THE CONCORD NH CLIMATE SUMMARY FOR THE FALL SEASON, FROM
9/1/2018 TO 11/30/2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1868 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              98   09/02/1953
 LOW              -17   11/30/1875
HIGHEST            94   09/03        88       6       91  09/24
LOWEST              5   11/23        11      -6       15  11/28
AVG. MAXIMUM     57.3              60.5    -3.2     65.0
AVG. MINIMUM     39.0              37.1     1.9     41.9
MEAN             48.2              48.8    -0.6     53.5
DAYS MAX >= 90      3               0.6     2.4        4
DAYS MAX <= 32      4               1.3     2.7        0
DAYS MIN <= 32     35              35.0     0.0       26
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        22.08   2005
 MINIMUM         2.88   1908
TOTALS          16.77             11.14    5.63    12.32
DAILY AVG.       0.19              0.12    0.07     0.14
DAYS >= .01        38              30.6     7.4       28
DAYS >= .10        31              19.2    11.8       16
DAYS >= .50        14               7.4     6.6        8
DAYS >= 1.00        6               2.8     3.2        6
GREATEST
 24 HR. TOTAL    1.23   09/10

SNOWFALL (INCHES)
RECORDS
 TOTAL           25.7   2011
TOTALS           13.3               2.6    10.7      0.6
SINCE 7/1        13.3               2.6    10.7      0.6
SNOWDEPTH AVG.      1
DAYS >= TRACE       7               1.9     5.1        2
DAYS >= 1.0         5               1.0     4.0        0
GREATEST
 SNOW DEPTH         8   11/23
                        11/21
                        11/22
 24 HR TOTAL      5.8   11/20

DEGREE_DAYS
HEATING TOTAL    1594              1512      82     1148
 SINCE 7/1       1624              1560      64     1201
COOLING TOTAL     116                39      77      119
 SINCE 1/1        734               452     282      564
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              5.1
HIGHEST WIND SPEED/DIRECTION    31/280    DATE  11/14
HIGHEST GUST SPEED/DIRECTION    44/280    DATE  10/16

SKY COVER
AVERAGE SKY COVER           0.60

AVERAGE RH (PERCENT)     77


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

&&

FALL IN CONCORD BEGAN IN A FAMILIAR WEATHER PATTERN WHICH HAD
DEVELOPED IN LATE SUMMER. A RIDGE OF HIGH PRESSURE OVER THE EAST
COAST AND WESTERN ATLANTIC WHICH PULLED WARM AND HUMID AIR AROUND IT
AND INTO NEW ENGLAND. MOST OF SEPTEMBER WAS WARM WITH ONLY BRIEF
PERIODS OF COOLER WEATHER BEHIND OCCASIONAL COLD FRONTS. FROM
SEPTEMBER 3 TO 6 CONCORD SAW THE TEMPERATURE TOP 90 DEGREES ON 3 OUT
OF 4 DAYS. A FEW PASSING STORMS BROUGHT OCCASIONAL HEAVY RAINFALL,
INCLUDING ALMOST 2 INCHES ON SEPTEMBER 10 AND 11. THE PERSISTENT
WARMTH AND HUMIDITY MADE SEPTEMBER THE 5TH WARMEST ON RECORD AT
CONCORD.

THE PATTERN DID NOT BEGIN TO CHANGE UNTIL MID OCTOBER, SO SOME
SUMMER LIKE TEMPERATURES WERE OBSERVED DEEP INTO THE FALL SEASON.
CONCORD TOPPED 80 DEGREES TWO DAYS IN A ROW ON OCTOBER 9 AND 10.
THIS PROVED TO BE THE LAST OF THE WARM WEATHER WITH THE FIRST FREEZE
OF THE SEASON COMING JUST A FEW DAYS LATER ON OCTOBER 13. THE
PATTERN WAS QUICKLY SHIFTING AS A TROUGH DEVELOPED OVER THE EASTERN
UNITED STATES BRINGING SEVERAL ROUNDS OF COLD AIR INTO THE AREA.
BEING FREQUENTLY ON THE EASTERN SIDE OF THIS TROUGH MEANT THAT STORM
SYSTEMS EXITING THE COUNTRY FREQUENTLY PASSED NEAR NEW ENGLAND
BRINGING NEW PRECIPITATION EVERY FEW DAYS. THE COOL, WET WEATHER LED
TO A LOT OF COOL DAYS AND MILD NIGHTS. EVEN THIS BEGAN TO CHANGE IN
MID NOVEMBER, THOUGH, AS TWO ARCTIC AIR MASSES MADE THEIR WAY INTO
NEW ENGLAND. THE FIRST WAS HERALDED BY MORE THAN AN INCH OF RAIN AND
A COLD FRONTAL PASSAGE ON NOVEMBER 13. THE TEMPERATURE DID NOT EVEN
WARM ABOVE FREEZING THE NEXT TWO DAYS, ABOUT TWO WEEKS EARLIER THAN
CONCORDS NORMAL FIRST SUBFREEZING DAY. WITH THE EVEN COLDER AIR IN
PLACE, THE FREQUENT STORMINESS BEGAN BRINGING SNOW INSTEAD OF RAIN,
WITH THE FIRST SNOWSTORM OF THE SEASON COMING ON NOVEMBER 15 AND 16
WHEN MORE THAN 5 INCHES WAS MEASURED. ANOTHER SNOWSTORM ARRIVED JUST
A FEW DAYS LATER WHEN MORE THAN 6 INCHES FELL ON NOVEMBER 19 AND 20.
EVEN COLDER AIR POURED IN BEHIND THIS STORM JUST IN TIME FOR
THANKSGIVING. AFTER FALLING TO 6 DEGREES THANKSGIVING MORNING,
NOVEMBER 22, THE TEMPERATURE ONLY MADE IT UP TO 17 DEGREES THAT
AFTERNOON. THAT WAS THE COLDEST THANKSGIVING SINCE 1873 AND THE 3RD
COLDEST FALL DAY ON RECORD AT CONCORD. THE TEMPERATURE MODERATED
BACK TOWARD NORMAL BY THE END OF NOVEMBER WITH SNOW CHANGING BACK TO
RAIN, BUT IT WAS NOT ENOUGH TO GET RID OF THE EARLY SEASON SNOW
COVER.

THE AVERAGE TEMPERATURE FOR THE FALL WAS 48.2 DEGREES WHICH WAS 0.6
DEGREES BELOW NORMAL AND THE COOLEST FALL SINCE 2013. THE LAST
SEVERAL FALLS WERE WELL ABOVE NORMAL INCLUDING THE WARMEST ON RECORD
JUST LAST YEAR WHEN THE AVERAGE TEMPERATURE WAS 53.5 DEGREES IN
2017. THE COOLEST FALL WAS IN 1972 WHEN IT WAS ONLY 43.7 DEGREES.

THE FIRST FREEZE OF THE SEASON CAME ON OCTOBER 13, MORE THAN 2 WEEKS
LATER THAN NORMAL. THIS COMBINED WITH AN EARLY END TO THE FREEZE
SEASON IN SPRING TO CREATE THE LONGEST GROWING SEASON ON RECORD AT
CONCORD AT 172 DAYS. THE FOLLOWING TABLE LISTS THE LONGEST GROWING
SEASONS AT CONCORD.

LONGEST STRETCHES OF ABOVE FREEZING TEMPERATURES (SINCE 1868)...
RANK  DAYS  DATES
1      172  APR 24 TO OCT 13, 2018  <===
2      171  APR 23 TO OCT 11, 1889
       171  APR 24 TO OCT 12, 1872
4      170  MAY 1 TO OCT 18, 1909
5      166  MAY 12 TO OCT 25, 1921

THANKSGIVING DAY, NOVEMBER 22, WAS ONE OF THE COLDEST DAYS ON RECORD
FOR THE FALL SEASON. THE FOLLOWING TABLE LISTS THE COLDEST HIGHS ON
RECORD FOR THE FALL.

COLDEST HIGH TEMPERATURES OBSERVED IN FALL (SINCE 1868)...
RANK  TEMP  DATE
1      7    NOV 30, 1875
2      15   NOV 27, 1873
3      17   NOV 22, 2018  <===
4      17   NOV 27, 1978
5      17   NOV 29, 1871
6      19   NOV 28, 1901
7      19   NOV 30, 1871

A TOTAL OF 16.77 INCHES OF PRECIPITATION FELL WHICH WAS 5.63 INCHES
ABOVE NORMAL AND THE 7TH WETTEST FALL ON RECORD. ALTHOUGH THE LAST
HALF OF THE FALL WAS NOTABLE FOR THE FREQUENT STORMINESS, THE
HEAVIEST PRECIPITATION ACTUALLY FELL ON SEPTEMBER 10 AND 11 WHEN
1.91 INCHES WAS RECORDED. THE WETTEST FALL WAS IN 2005 WHEN 22.08
INCHES FELL. THE DRIEST WAS IN 1908 WHEN ONLY 2.88 INCHES WAS
RECORDED. THE FOLLOWING TABLE LISTS THE WETTEST FALLS ON RECORD.

MOST PRECIPITATION IN FALL (SINCE 1868)...
RANK  PRECIP  YEAR
1      22.08  2005
2      20.75  1888
3      17.74  2011
4      17.41  1898
5      17.35  1869
6      17.07  1907
7      16.77  2018  <===
8      15.71  1938
9      15.61  1868
10     15.59  1995

THERE WERE 31 DAYS THIS FALL THAT RECORDED AT LEAST 0.1 INCHES OF
RAIN. THIS WAS THE MOST ON RECORD AT CONCORD, A RESULT OF THE
FREQUENT STORMINESS. THE FOLLOWING TABLE LISTS THE YEARS WITH THE
MOST DAYS WITH 0.1 INCHES OF PRECIPITATION OR GREATER IN FALL AT
CONCORD.

FALL DAYS WITH PRECIPITATION OF 0.10 INCHES OR MORE (SINCE 1868)...
RANK  DAYS  YEAR
1      31   2018  <===
2      30   1888
3      27   1921
       27   1896
       27   1881
6      26   1872
7      25   2011*
* MOST RECENT OF SEVERAL OCCURRENCES

A TOTAL OF 13.3 INCHES OF SNOW FELL WHICH WAS 10.7 INCHES ABOVE
NORMAL. THE SNOWIEST FALL ON RECORD WAS IN 2011 WHEN 25.7 INCHES OF
SNOW FELL. THERE HAVE BEEN 3 YEARS IN WHICH NO SNOW FELL IN FALL,
MOST RECENTLY IN 2015. AN ADDITIONAL 29 YEARS HAVE RECORDED ONLY A
TRACE OF SNOWFALL IN FALL, MOST RECENTLY IN 2010.

EQUIPMENT PROBLEMS AT THE CONCORD ASOS CAUSED TEMPERATURE DATA TO BE
LOST ON OCTOBER 1 AND 2 AS WELL AS NOVEMBER 22 AND 23. HIGH AND LOW
TEMPERATURE DATA WERE SUPPLEMENTED BY DATA FROM THE NEARBY RIVER
GAUGE LOCATION AT PEMBROKE ON THESE DATES.

THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN FALL 2018...
DATE    RECORD                               PREVIOUS
SEP 3   94   - WARMEST HIGH TEMPERATURE      93 IN 1973
SEP 5   91   - WARMEST HIGH TEMPERATURE      91 IN 1961 AND OTHERS (TIED)
SEP 6   92   - WARMEST HIGH TEMPERATURE      91 IN 1998

$$

KIMBLE



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