Climatological Report (Seasonal)
Issued by NWS Portland, ME

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CXUS51 KGYX 070930
CLSCON

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TTAA00 KGYX 041002


CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
429 AM EST THU DEC 7 2017

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

...THE CONCORD NH CLIMATE SUMMARY FOR THE SEASON, FROM
9/1/2017 TO 11/30/2017...

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              98   09/02/1953
 LOW              -17   11/30/1875
HIGHEST            91   09/24        88       3       94  09/09
LOWEST             15   11/28        11       4       23  11/29
                                                          11/28
AVG. MAXIMUM     65.0              60.5     4.5     64.0
AVG. MINIMUM     41.9              37.1     4.8     40.3
MEAN             53.5              48.8     4.7     52.1
DAYS MAX >= 90      4               0.6     3.4        1
DAYS MAX <= 32      0               1.3    -1.3        0
DAYS MIN <= 32     26              35.0    -9.0       31
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        22.08   2005
 MINIMUM         2.88   1908
TOTALS          12.32             11.14    1.18    11.57
DAILY AVG.       0.14              0.12    0.02     0.13
DAYS >= .01        28              30.6    -2.6       33
DAYS >= .10        16              19.2    -3.2       18
DAYS >= .50         8               7.4     0.6        7
DAYS >= 1.00        6               2.8     3.2        3
GREATEST
 24 HR. TOTAL    3.22   10/24 TO 10/25

SNOWFALL (INCHES)
RECORDS
 TOTAL           25.7   2011
TOTALS            0.6               2.6    -2.0      0.7
SINCE 7/1         0.6               2.6    -2.0      0.7
SNOWDEPTH AVG.      0
DAYS >= TRACE       2               1.9     0.1        5
DAYS >= 1.0         0               1.0    -1.0        0
GREATEST
 SNOW DEPTH         1   11/14
 24 HR TOTAL      0.6   11/13

DEGREE_DAYS
HEATING TOTAL    1148              1512    -364     1240
 SINCE 7/1       1201              1560    -359     1252
COOLING TOTAL     119                39      80       91
 SINCE 1/1        564               452     112      715
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              5.4
HIGHEST WIND SPEED/DIRECTION    35/320    DATE  11/26
HIGHEST GUST SPEED/DIRECTION    50/130    DATE  10/30

SKY COVER
AVERAGE SKY COVER           0.40

AVERAGE RH (PERCENT)     71

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     HEAVY RAIN                12
RAIN                     13     LIGHT RAIN                35
FREEZING RAIN             0     LT FREEZING RAIN           0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW                2     FOG                       54
FOG W/VIS <= 1/4 MILE    17     HAZE                       4

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

&&

AFTER A RELATIVELY COOL AUGUST, THE COOL FALL-LIKE WEATHER CONTINUED
INTO THE FIRST FEW DAYS OF SEPTEMBER. AFTER A FEW DAYS OF RAIN, A
NEW WEATHER PATTERN BEGAN TO EMERGE. A RIDGE OF HIGH PRESSURE OVER
THE WESTERN ATLANTIC AND THE EAST COAST BROUGHT RELATIVELY WARM AIR
NORTHWARD INTO NEW ENGLAND. ALTHOUGH A FEW COLD FRONTS MANAGED TO
SNEAK INTO THE AREA BRINGING BRIEFLY COOLER WEATHER, THE OVERALL
TREND OF WARMER THAN NORMAL TEMPERATURES CONTINUED FOR SEVERAL
WEEKS. THE WARMEST PERIOD WAS IN LATE SEPTEMBER WHEN CONCORD SAW 4
STRAIGHT DAYS IN THE 90S FROM SEPTEMBER 24 THRU 27. THE PERSISTENT
WARMTH CONTINUED DEEP INTO OCTOBER, BRINGING CONCORD ITS THIRD
WARMEST SEPTEMBER AND SECOND WARMEST OCTOBER ON RECORD. THE FIRST
FREEZE OF THE SEASON CAME ON OCTOBER 13, ABOUT TWO WEEKS LATER THAN
NORMAL AND THE LATEST DATE OF THE FIRST FALL FREEZE SINCE 2007.
AFTER A MOSTLY DRY FIRST HALF OF FALL, A SERIES OF LOW PRESSURE
SYSTEMS MOVED THROUGH NEW ENGLAND LATE IN OCTOBER. MORE THAN 4
INCHES OF RAIN FELL FROM OCTOBER 24 THROUGH 26. ANOTHER LOW PRESSURE
SYSTEM BROUGHT ANOTHER TWO INCHES OF RAIN AND STRONG WINDS GUSTING
TO 50 MPH ON THE NIGHT OF OCTOBER 29 INTO THE MORNING OF THE 30TH.
THE STRONG WINDS BROUGHT WIND DAMAGE TO THE REGION. THIS PERIOD OF
STORMY WEATHER SIGNALED A COMING CHANGE IN THE WEATHER PATTERN AS
THE PERSISTENT WARMTH FINALLY BEGAN TO BREAK DOWN. AFTER ANOTHER
BRIEF PERIOD OF WARMTH, A COLD FRONT ON NOVEMBER 6 BROUGHT COLD AIR
INTO THE REGION. EVEN COLDER AIR POURED IN STRAIGHT OUT OF THE
ARCTIC A FEW DAYS LATER. THE FIRST MEASURABLE SNOW OF THE SEASON
OCCURRED ON NOVEMBER 13 WHEN 0.6 INCHES FELL. COLD WEATHER CONTINUED
THROUGH MUCH OF NOVEMBER WITH ONLY BRIEF EXCEPTIONS AS A SERIES OF
COLD FRONTS KEPT BRINGING MORE COLD AIR IN DURING THE MONTH.
ALTHOUGH THE FALL ENDED COLDER THAN NORMAL, THE VERY WARM START TO
THE SEASON ENSURED CONCORD WOULD FINISH AS THE WARMEST FALL ON
RECORD.

THE AVERAGE TEMPERATURE FOR THE SEASON WAS 53.5 DEGREES WHICH WAS
4.7 DEGREES ABOVE NORMAL AND THE WARMEST FALL ON RECORD. UNTIL THIS
YEAR, THE WARMEST FALL WAS IN 1961 WHEN THE AVERAGE TEMPERATURE WAS
53.0 DEGREES. THE COLDEST WAS 43.7 DEGREES IN 1972. THE FOLLOWING
TABLE LISTS THE WARMEST FALLS AT CONCORD.

WARMEST AVERAGE TEMPERATURE IN FALL (SINCE 1868)...
RANK  TEMP  YEAR
1     53.5  2017 <===
2     53.0  1961
3     52.6  1881
4     52.3  1931
      52.3  1878
      52.3  1877
7     52.1  2016
      52.1  1879
9     51.9  2011
      51.9  1882

A TOTAL OF 12.32 INCHES OF PRECIPITATION FELL WHICH WAS 1.18 INCHES
ABOVE NORMAL AND THE WETTEST FALL SINCE 2011. MORE THAN HALF OF THIS
PRECIPITATION FELL DURING THE LAST WEEK OF OCTOBER WHEN SEVERAL
STORM SYSTEMS DROPPED MORE THAN 7 INCHES OF RAIN. THE WETTEST FALL
ON RECORD WAS IN 2005 WHEN 22.08 INCHES FELL. THE DRIEST WAS IN 1908
WHEN ONLY 2.88 INCHES WAS MEASURED.

A TOTAL OF 0.6 INCHES OF SNOW FELL WHICH WAS 2.0 INCHES BELOW
NORMAL. ALL OF THIS SNOW FELL ON NOVEMBER 13.  FALL SNOWFALL CAN BE
QUITE VARIABLE, WITH MEASURABLE SNOWFALL OBSERVED ABOUT 79 PERCENT
OF THE TIME. THE SNOWIEST FALL WAS IN 2011 WHEN 25.7 INCHES WAS
MEASURED. NO SNOW FELL IN FALL IN 3 SEPARATE YEARS, MOST RECENTLY IN
2015. ONLY A TRACE FELL IN 29 SEPARATE YEARS, MOST RECENTLY IN 2010.

THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN FALL 2017...
DATE    RECORD                               PREVIOUS
SEP 24  91   - WARMEST HIGH TEMPERATURE     90 IN 2010
SEP 25  90   - WARMEST HIGH TEMPERATURE     89 IN 1970
SEP 26  90   - WARMEST HIGH TEMPERATURE     90 IN 2007 /TIED/
SEP 27  90   - WARMEST HIGH TEMPERATURE     88 IN 1933
OCT 25  2.65 - GREATEST RAINFALL            2.07 IN 2005

$$

KIMBLE


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