Climatological Report (Annual)
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CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
443 PM EST TUE JAN 15 2019

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

...THE MANCHESTER CLIMATE SUMMARY FOR THE YEAR OF 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1948 TO 2019

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             103   07/22/2011
 LOW              -20   02/13/1967
HIGHEST            95   08/29        97      -2       97  06/12
                        08/06
                        07/03
LOWEST            -10   01/02        -5      -5       -4  12/29
AVG. MAXIMUM     60.1              58.7     1.4     59.9
AVG. MINIMUM     42.1              39.7     2.4     41.6
MEAN             51.1              49.2     1.9     50.8
DAYS MAX >= 90     29              10.9    18.1       13
DAYS MAX <= 32     29              34.8    -5.8       35
DAYS MIN <= 32    131             130.1     0.9      123
DAYS MIN <= 0       4               3.0     1.0        4

PRECIPITATION (INCHES)
TOTALS          51.13             44.58    6.55    40.85
DAILY AVG.       0.14              0.12    0.02     0.11
DAYS >= .01       142             131.1    10.9      123
DAYS >= .10        88              78.2     9.8       81
DAYS >= .50        33              28.4     4.6       26
DAYS >= 1.00       10               9.5     0.5       10
GREATEST
 24 HR. TOTAL    3.86   09/18

SNOWFALL (INCHES)
TOTALS           76.2                               70.2
SINCE 7/1        13.3                               16.0
SNOWDEPTH AVG.      1
DAYS >= TRACE      54                                 46
DAYS >= 1.0        12                                 17
GREATEST
 SNOW DEPTH        21   03/14
 24 HR TOTAL     16.6   03/07 TO 03/08

DEGREE_DAYS
HEATING TOTAL    6034              6394    -360     5893
 SINCE 7/1       2394              2368      26     2198
COOLING TOTAL    1063               641     422      812
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.7
HIGHEST WIND SPEED/DIRECTION    38/310    DATE  01/04
HIGHEST GUST SPEED/DIRECTION    53/320    DATE  11/14

SKY COVER
AVERAGE SKY COVER           0.60

AVERAGE RH (PERCENT)     66


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

&&

THE YEAR BEGAN IN THE MIDST OF AN INTENSE COLD WAVE THAT HAD BEGUN
ON CHRISTMAS DAY AND INTENSIFIED INTO THE NEW YEAR. THE COLDEST
TEMPERATURE WAS ON JANUARY 2 WHEN IT FELL TO 10 BELOW ZERO. A FEW
DAYS LATER AN INTENSE NOR`EASTER BROUGHT HEAVY SNOW AND BLIZZARD
CONDITIONS ON JANUARY 4. MORE COLD AIR POURED IN BEHIND THIS STORM,
THOUGH IT DID NOT LAST AS LONG THIS TIME. AFTER SEVERAL WEEKS OF
INTENSE COLD, THE JANUARY THAW ARRIVED. THE TEMPERATURE REACHED 60
DEGREES ON JANUARY 12 AND 13 WITH RAIN WASHING AWAY THE SNOW PACK
THAT HAD BUILT UP. A COLD FRONT BROUGHT A SHARP DROP IN TEMPERATURE
ON JANUARY 13 AS THE TEMPERATURE FELL FROM 61 THAT MORNING TO 14 BY
MIDNIGHT. THE COLD DID NOT LAST LONG AS A GRADUAL WARMING TREND
BEGAN AND LASTED THROUGH FEBRUARY WITH ONLY A FEW WINTRY SET BACKS.
AFTER A QUICK 6 INCHES OF SNOW ON FEBRUARY 18, THE WARM WEATHER
RETURNED IN A HURRY. JUST 3 DAYS LATER THE TEMPERATURE SOARED ALL
THE WAY TO 77 DEGREES, WARMER THAN ANY TEMPERATURE EVER OBSERVED IN
THE STATE OF NEW HAMPSHIRE IN FEBRUARY UP TO THAT POINT. ALTHOUGH
THE LATE WINTER WARMTH SENT SIGNALS OF AN EARLY SPRING, WINTER WOULD
RETURN IN THE MIDDLE OF MARCH. TWO INTENSE NOR`EASTERS EACH BROUGHT
MORE THAN A FOOT OF SNOW, THE FIRST ON MARCH 7 AND 8 AND THE NEXT ON
MARCH 13 AND 14. A RETURN TO COLD WEATHER AFTER THE SECOND STORM
ENSURED THAT MANCHESTER GOT AN EXTRA THREE WEEKS OF SNOW COVER IN
EARLY SPRING. AFTER A BRIEF WARM UP AT THE END OF MARCH, SEVERAL
TROUGHS OF LOW PRESSURE DROPPED DOWN FROM CANADA DURING APRIL. THIS
BROUGHT COOL WEATHER AND FREQUENT AFTERNOON RAIN AND SNOW SHOWERS.
THE COLDEST DAY WAS APRIL 15 WHEN SNOW, SLEET, AND FREEZING RAIN
FELL MOST OF THE DAY AND THE TEMPERATURE BARELY WARMED ABOVE
FREEZING, QUITE UNUSUAL FOR SO LATE IN THE YEAR. IN FACT, THE LAST
FREEZE OF THE SEASON WAS JUST THE NEXT DAY AS WARMER AIR MOVED IN
ALONG WITH SOME HEAVY RAIN.

LATE SPRING ACCELERATED QUICKLY INTO SUMMER-LIKE WARMTH AS THE
TEMPERATURE SOARED TO 93 DEGREES ON MAY 8. THE WEATHER PATTERN HAD
SHIFTED FROM A COOL, WET ONE TO A WARM AND DRY ONE. ROUND AFTER
ROUND OF DRY AIR MOVED IN FROM CANADA AND THE INTERIOR OF NORTH
AMERICA LEADING TO MANY WARM DAYS, SOME COOL NIGHTS, AND VERY LITTLE
RAIN. ALTHOUGH THERE WERE A FEW DAYS OF COOL, DAMP WEATHER IN EARLY
JUNE, THE WARM AND DRY CONDITIONS CONTINUED. THIS WOULD NOT REALLY
CHANGE UNTIL THE END OF JUNE WHEN TWO LOW PRESSURE SYSTEMS BROUGHT
MORE THAN AN INCH OF RAIN ON JUNE 24 AND JUNE 28 WITH HOT AND HUMID
WEATHER BECOMING DOMINANT. THE TEMPERATURE TOPPED 90 DEGREES FOR 7
STRAIGHT DAYS FROM JUNE 29 THRU JULY 5. OPPRESSIVE HUMIDITY ENSURED
THE TEMPERATURE FREQUENTLY REMAINED ABOVE 70 AT NIGHT. ALTHOUGH A
FEW COLD FRONTS BROUGHT SOME COOLER AND DRIER AIR IN MID JULY, THE
HEAT AND HUMIDITY KEPT RETURNING. A RIDGE OF HIGH PRESSURE OVER THE
WESTERN ATLANTIC BROUGHT A FLOW OF HOT AND HUMID AIR AROUND IT AND
INTO NEW ENGLAND. WITHIN THE HOT AND HUMID AIR MASSES, SHOWERS AND
THUNDERSTORMS WOULD OFTEN BUBBLE UP IN THE AFTERNOON, OCCASIONALLY
DROPPING VERY HEAVY RAINFALL. ONE SUCH THUNDERSTORM DROPPED MORE
THAN 3 INCHES OF RAIN ON JULY 17. HOT AND HUMID CONDITIONS CONTINUED
THROUGH MOST OF AUGUST WITH OCCASIONALLY HEAVY RAIN. MANCHESTER
ENDURED ANOTHER LONG STRETCH OF 90 DEGREE HEAT WHEN THE TEMPERATURE
REACHED 90 ON 4 CONSECUTIVE DAYS FROM SEPTEMBER 3 THRU 6. ALTHOUGH
THIS WAS THE LAST OF THE 90 DEGREE HEAT, THE PERSISTENT RIDGE OF
HIGH PRESSURE CONTINUED TO PUMP WARM AND HUMID AIR INTO NEW ENGLAND.
AFTER HURRICANE FLORENCE MADE LANDFALL IN NORTH CAROLINA, ITS
REMNANTS MADE THEIR WAY AROUND THE RIDGE AND CROSSED THROUGH NEW
ENGLAND. THIS BROUGHT 3.86 INCHES OF RAIN TO THE CITY ON SEPTEMBER
18, THE MOST RAIN OF THE YEAR.

AFTER TWO MORE DAYS OF 80 DEGREE WARMTH ON OCTOBER 9 AND 10, A COLD
FRONT BROUGHT COOLER WEATHER AND USHERED IN A SHIFT IN THE WEATHER
PATTERN. A TROUGH DEVELOPED OVER THE CENTRAL AND EASTERN UNITED
STATES BRINGING SEVERAL ROUNDS OF COLD AIR INTO THE AREA. THE FIRST
FREEZE OF THE SEASON CAME ON OCTOBER 18 ALONG WITH THE FIRST
SNOWFLAKES. BEING ON THE EASTERN SIDE OF THE TROUGH MEANT THAT MOST
OF THE STORMS CROSSING THE COUNTRY WOULD EXIT THROUGH NEW ENGLAND
BRINGING NEW PRECIPITATION EVERY FEW DAYS FOR SEVERAL WEEKS LASTING
THROUGH NOVEMBER. A STRONG COLD FRONT ON NOVEMBER 13 SENT THE
TEMPERATURE TUMBLING TO NEW LOWS. IT DIDN`T EVEN WARM ABOVE FREEZING
ON NOVEMBER 15 AS THE FIRST SNOWSTORM OF THE SEASON BEGAN. ANOTHER
SNOWSTORM CAME ON NOVEMBER 20 WITH EVEN COLDER AIR POURING IN BEHIND
IT JUST IN TIME FOR THANKSGIVING. THE TEMPERATURE FELL TO 9 DEGREES
THANKSGIVING MORNING, NOVEMBER 21, AND ONLY WARMED TO 18 THAT
AFTERNOON. THIS WOULD HAVE BEEN CONSIDERED COLD BY JANUARY STANDARDS
BUT FOR NOVEMBER IT WAS EXCEPTIONAL. THINGS DID WARM UP A BIT AT THE
END OF NOVEMBER AND BEGINNING OF DECEMBER, ENOUGH TO MELT THE EARLY
SEASON SNOW. ONE MORE BLAST OF ARCTIC AIR CAME IN THE MIDDLE OF
DECEMBER, BUT THIS TIME IT BROUGHT AN END TO THE FREQUENT STORMY
WEATHER. MANCHESTER WENT NEARLY TWO WEEKS WITHOUT MEASURABLE
PRECIPITATION FROM DECEMBER 3 TO 15. WARMER WEATHER BEGAN TO SNEAK
IN FOR THE END OF THE YEAR. A RAINSTORM ON DECEMBER 21 WAS
ACCOMPANIED BY TEMPERATURES IN THE MID 60S.

THE AVERAGE TEMPERATURE FOR THE YEAR WAS 51.1 DEGREES WHICH WAS 1.9
DEGREES ABOVE NORMAL. THE TEMPERATURE RANGED FROM 10 BELOW ZERO ON
JANUARY 2 TO 95 DEGREES ON JULY 1, JULY 3, AUGUST 6, AND AUGUST 29.
THE FOLLOWING TABLE LISTS THE AVERAGE TEMPERATURES FOR EACH MONTH OF
2018 INCLUDING DEPARTURES FROM NORMAL.

AVERAGE TEMPERATURES BY MONTH IN 2018
MONTH      MAXIMUM       MINIMUM      AVERAGE
JANUARY    33.8 (+0.7)   15.9 (+0.2)  24.9 (+0.5)
FEBRUARY   43.8 (+6.9)   24.4 (+5.4)  34.1 (+6.1)
MARCH      44.4 (-0.5)   29.7 (+2.5)  37.0 (+1.0)
APRIL      55.0 (-2.6)   36.1 (-0.9)  45.6 (-1.7)
MAY        77.7 (+9.0)   53.2 (+5.7)  65.5 (+7.4)
JUNE       79.4 (+1.9)   58.2 (+1.6)  68.8 (+1.8)
JULY       87.0 (+4.6)   65.6 (+2.9)  76.3 (+3.8)
AUGUST     84.0 (+3.0)   66.7 (+5.8)  75.4 (+4.4)
SEPTEMBER  74.8 (+2.2)   58.4 (+5.9)  66.6 (+4.0)
OCTOBER    58.2 (-2.8)   42.5 (+1.9)  50.4 (-0.4)
NOVEMBER   42.9 (-6.9)   30.8 (-2.3)  36.8 (-4.7)
DECEMBER   39.9 (+1.7)   24.0 (+1.5)  31.9 (+1.5)
ANNUAL     60.1 (+1.4)   42.1 (+2.4)  51.1 (+1.9)

A TOTAL OF 51.13 INCHES OF PRECIPITATION FELL THIS YEAR WHICH WAS
6.55 INCHES ABOVE NORMAL. THIS WAS THE WETTEST YEAR IN MANCHESTER
SINCE 2008 AND THE FIRST WETTER THAN NORMAL YEAR SINCE 2011. THE
HEAVIEST RAIN OF THE YEAR FELL ON SEPTEMBER 18 WHEN THE REMNANTS OF
HURRICANE FLORENCE DROPPED 3.86 INCHES OF RAIN. THE FOLLOWING TABLE
LISTS THE PRECIPITATION AND SNOWFALL TOTALS FOR EACH MONTH IN 2018
INCLUDING DEPARTURE FROM NORMAL PRECIPITATION.

MONTHLY PRECIPITATION AND SNOWFALL TOTALS FOR 2018
MONTH      PRECIPITATION   SNOWFALL
JANUARY    1.88  (-1.14)     16.1
FEBRUARY   3.34  (+0.56)     14.5
MARCH      2.86  (-1.47)     32.3
APRIL      4.01  (+0.15)       T
MAY        0.77  (-3.28)      0.0
JUNE       4.79  (+1.00)      0.0
JULY       5.57  (+1.77)      0.0
AUGUST     6.71  (+3.08)      0.0
SEPTEMBER  7.30  (+3.49)      0.0
OCTOBER    2.98  (-1.18)       T
NOVEMBER   8.33  (+4.26)     13.1
DECEMBER   2.59  (-0.69)      0.2
ANNUAL     51.13 (+6.55)     76.2

THERE WERE 10 DAYS WHICH RECORDED 1.00 INCH OR MORE OF
PRECIPITATION, ONLY SLIGHTLY ABOVE NORMAL. THE FOLLOWING TABLE LISTS
THE DAYS IN 2018 WHICH RECORDED AT LEAST 1.00 INCH OF PRECIPITATION.

DAYS WITH AT LEAST 1.00 INCH OF PRECIPITATION IN 2018
DAY           PRECIPITATION
APRIL 16      1.62
JUNE 24       1.43
JUNE 28       1.74
JULY 17       3.08
AUGUST 14     1.75
SEPTEMBER 18  3.86
SEPTEMBER 25  1.04
NOVEMBER 2    1.25
NOVEMBER 3    1.34
NOVEMBER 13   1.21

SNOWFALL STATISTICS ARE NORMALLY LISTED BY SEASON RATHER THAN BY
CALENDAR YEAR. HOWEVER, 2018 SAW 76.2 INCHES OF SNOWFALL. THE
HEAVIEST SNOW FELL IN MARCH WHEN TWO NOR`EASTERS DROPPED HEAVY
SNOWFALL. THE HEAVIEST WAS MARCH 13 AND 14 WHEN 17.3 INCHES WAS
MEASURED. THE FOLLOWING TABLE LISTS THE DAYS THAT RECORDED AT LEAST
6 INCHES OF SNOWFALL IN 2018.

DAYS WITH AT LEAST 6 INCHES OF SNOWFALL
DAY           SNOWFALL
JANUARY 4     9.3
JANUARY 17    6.1
FEBRUARY 18   6.0
MARCH 7       6.4
MARCH 8       7.1
MARCH 13      16.6
NOVEMBER 16   6.0

HISTORICAL RECORDS AT MANCHESTER ARE NOT PROVIDED DUE TO NUMEROUS
MISSING YEARS WITHIN THE HISTORICAL RECORD. ALTHOUGH THE EARLIEST
DATA AVAILABLE IS IN 1885, THERE ARE SIGNIFICANT GAPS IN THE DATA. A
LOCAL STUDY HAS YET TO BE COMPLETED TO DETERMINE IF MEANINGFUL
INFORMATION ON EXTREME TEMPERATURE, PRECIPITATION, OR SNOWFALL CAN
BE REPORTED. NORMAL VALUES REPORTED ARE CONSIDERED BEST ESTIMATES.

$$

KIMBLE


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