Climatological Report (Seasonal)
Issued by NWS Portland, ME

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CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
949 PM EDT SAT MAR 17 2018

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

...THE CONCORD NH CLIMATE SUMMARY FOR THE WINTER SEASON, FROM
12/1/2017 TO 2/28/2018...

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              74   02/21/2018
 LOW              -37   02/16/1943
HIGHEST            74R  02/21        60      14       69  02/24
LOWEST            -19   01/02       -15      -4       -9  12/20
AVG. MAXIMUM     34.7              34.0     0.7     38.7
AVG. MINIMUM     15.3              13.8     1.5     18.7
MEAN             25.0              23.9     1.1     28.7
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     39              39.8    -0.8       24
DAYS MIN <= 32     86              85.8     0.2       83
DAYS MIN <= 0      17              14.2     2.8        7

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        16.68   2008
 MINIMUM         3.14   1980
TOTALS           9.83              8.52    1.31     8.55
DAILY AVG.       0.11              0.09    0.02     0.10
DAYS >= .01        34              31.3     2.7       39
DAYS >= .10        24              18.0     6.0       26
DAYS >= .50         7               6.0     1.0        7
DAYS >= 1.00        0               1.8    -1.8        0
GREATEST
 24 HR. TOTAL    0.88   02/07

SNOWFALL (INCHES)
RECORDS
 TOTAL          102.0   2008
TOTALS           56.9              44.9    12.0     56.3
SINCE 7/1        57.5              47.5    10.0     57.0
SNOWDEPTH AVG.      8
DAYS >= TRACE      23              21.6     1.4       36
DAYS >= 1.0        14              11.5     2.5       16
GREATEST
 SNOW DEPTH        21   01/05
 24 HR TOTAL     13.0   01/04

DEGREE_DAYS
HEATING TOTAL    3596              3700    -104     3246
 SINCE 7/1       4497              5260    -463     4498
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.3
HIGHEST WIND SPEED/DIRECTION    33/310    DATE  02/05
HIGHEST GUST SPEED/DIRECTION    47/320    DATE  01/04

SKY COVER
AVERAGE SKY COVER           0.50

AVERAGE RH (PERCENT)     70

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

&&

AFTER COLD WEATHER HAD LASTED MUCH OF NOVEMBER, THIS COLD BEGAN TO
EASE UP A BIT AS THE CALENDAR CHANGED TO DECEMBER. THE FIRST WEEK
SAW TEMPERATURES WARMING INTO THE 40S AND EVEN THE 50S. BUT THIS
BRIEF BREAK FROM THE COLD WAS NOT GOING TO LAST. THE FIRST
SIGNIFICANT SNOWSTORM OF THE SEASON ARRIVED ON DECEMBER 9 WHEN MORE
THAN 4 INCHES OF SNOW FELL. THE SNOW FROM THIS STORM WOULD LAST
THROUGH THE WINTER. COLDER TEMPERATURES SOON BECAME THE NEW NORMAL
WITH THE NEXT SEVERAL STORM SYSTEMS BRINGING SNOW FOLLOWED BY
FREEZING RAIN. THE NEXT SIGNIFICANT SNOWSTORM ARRIVED CHRISTMAS
MORNING WITH 5 INCHES OF SNOW FALLING IN JUST A FEW HOURS. BRUTALLY
COLD ARCTIC AIR POURED INTO NEW ENGLAND BEHIND THIS STORM. THE
TEMPERATURE DID NOT RISE ABOVE FREEZING AGAIN UNTIL WELL INTO THE
NEW YEAR. FOR 12 STRAIGHT DAYS THE TEMPERATURE FELL BELOW ZERO EACH
NIGHT, AND FOR 5 STRAIGHT DAYS THE TEMPERATURE DID NOT WARM ABOVE 10
DEGREES DURING THE DAY. DURING THE MIDST OF THIS BRUTAL COLD SPELL,
AN INTENSE STORM SYSTEM BROUGHT 13 INCHES OF SNOW ON JANUARY 4. THIS
STORM WAS ACCOMPANIED BY 47 MPH WIND GUSTS CREATING BLIZZARD
CONDITIONS. A REINFORCING SHOT OF BRUTAL COLD POURED IN AGAIN AFTER
THIS STORM. FINALLY THE INTENSE COLD BEGAN TO BREAK AND THE
TEMPERATURE ROSE ABOVE FREEZING AGAIN FOR THE FIRST TIME ON JANUARY
9, JUST AS THE JANUARY THAW BEGAN. THE NEXT 4 DAYS BROUGHT WARMING
TEMPERATURES INCLUDING 3 DAYS IN THE 50S. THE TEMPERATURE PEAKED AT
57 DEGREES ON THE 12TH AND 13TH AS WARM AIR AND HEAVY RAINFALL
SURGED NORTHWARD AHEAD OF A STRONG COLD FRONT. THIS WARM WEATHER AND
RAINFALL PUT A DENT IN THE EARLY SEASON SNOW COVER, BUT STILL 6
INCHES REMAINED AFTER THE THAW WAS OVER. THE STRONG COLD FRONT
BROUGHT A RETURN TO VERY COLD WEATHER FOR A FEW DAYS, THOUGH THIS
COLD SPELL WAS NOT AS INTENSE OR AS LONG LASTING AS THE LAST ONE.
MORE SNOW FELL ON JANUARY 17TH WITH FREEZING RAIN ARRIVING ON
JANUARY 22ND AND 23. FOR THE NEXT FEW WEEKS THE TEMPERATURE
GRADUALLY BEGAN WARMING AGAIN, THOUGH SOME COLDER AIR RETURNED AT
THE END OF JANUARY INTO THE BEGINNING OF FEBRUARY. THE COLDEST
TEMPERATURE FROM THIS COLDER SPELL WAS -4 DEGREES ON FEBRUARY 3.
ULTIMATELY THIS PROVED TO BE THE LAST SIGNIFICANT COLD SPELL OF THE
WINTER. MUCH OF FEBRUARY SAW WARMING TEMPERATURES WITH JUST ENOUGH
PERIODIC WINTRY SET BACKS TO KEEP A FEW INCHES OF SNOW ON THE
GROUND. THE TWO BIGGEST SNOWSTORMS CAME ON FEBRUARY 7 AND 18 WITH
EACH ONE BRINGING MORE THAN 6 INCHES OF SNOW. THE GRADUAL WARMING
INTENSIFIED IN THE LAST PART OF THE MONTH AS A RIDGE OF HIGH
PRESSURE BROUGHT WARM AIR FROM THE SOUTHERN UNITED STATES INTO NEW
ENGLAND. TEMPERATURES IN THE 50S AND 60S WERE OBSERVED ON SEVERAL
DAYS DURING THE LAST WEEK OF FEBRUARY. THE WARMTH PEAKED WITH A
TEMPERATURE OF 74 DEGREES ON FEBRUARY 21, THE WARMEST TEMPERATURE
EVER OBSERVED IN THE MONTH OF FEBRUARY OR METEOROLOGICAL WINTER.
ALTHOUGH A COLD FRONT THAT EVENING BROUGHT COOLER TEMPERATURES BACK
INTO THE AREA, THE REST OF THE MONTH REMAINED ABOVE NORMAL WITH
SEVERAL DAYS REACHING THE 50S. BY THE END OF FEBRUARY THE WINTER
SNOW PACK HAD DWINDLED DOWN TO JUST 4 INCHES.

THE AVERAGE TEMPERATURE FOR THE SEASON WAS 25.0 DEGREES WHICH WAS
1.1 DEGREES ABOVE NORMAL. THE WARMEST WINTER WAS IN 2015-16 WHEN THE
AVERAGE TEMPERATURE WAS 30.9 DEGREES. THE COLDEST WAS IN 1917-18
WHEN IT WAS 15.5 DEGREES.

THE NEW YEARS COLD SPELL WAS ONE OF THE MOST INTENSE ON RECORD AT
CONCORD. IT FEATURED 15 STRAIGHT DAYS OF SUBFREEZING TEMPERATURES
INCLUDING 12 STRAIGHT DAYS OF SUBZERO TEMPERATURES AND 5 STRAIGHT
DAYS THAT THE TEMPERATURE DID NOT WARM ABOVE 10 DEGREES. THE
FOLLOWING TABLES LIST THE LONGEST STRETCHES OF TEMPERATURES 10
DEGREES OR COLDER AND LONGEST STRETCHES OF LOW TEMPERATURES ZERO OR
COLDER AT CONCORD.

MOST CONSECUTIVE DAYS MAX 10 DEGREES OR COLDER (SINCE 1868)...
RANK  DAYS  DATES
1      6    FEB 10 - FEB 15, 1979
2      5    DEC 28, 2017 - JAN 1, 2018 <===
3      4    DEC 29, 1917 - JAN 1, 1918
       4    FEB 10 - FEB 13, 1899
5      3    JAN 14 - JAN 16, 2004*
*MOST RECENT OF SEVERAL OCCURRENCES

MOST CONSECUTIVE DAYS WITH LOW OF ZERO OR COLDER (SINCE 1868)...
RANK  DAYS  DATES
1      16   DEC 30, 1967 - JAN 14, 1968
       16   JAN 23 - FEB 7, 1948
3      13   FEB 7 - FEB 19, 1875
4      12   DEC 27, 2017 - JAN 7, 2018 <===
       12   FEB 9, 1979 - FEB 20, 1979
       12   JAN 6 - JAN 17, 1942
7      11   DEC 23, 1872 - JAN 2, 1873
8      10   JAN 15, 1875 - JAN 24, 1875

THE 74 DEGREES WAS THAT WAS RECORDED ON FEBRUARY 21 WAS THE WARMEST
TEMPERATURE EVER RECORDED IN THE MONTH OF FEBRUARY AS WELL AS THE
WARMEST OF ANY WINTER SEASON. THE FOLLOWING TABLE LISTS THE WARMEST
TEMPERATURES ON RECORD FOR THE WINTER SEASON AT CONCORD.

WARMEST TEMPERATURE IN WINTER (SINCE 1868)
RANK  TEMP  DATE
1      74   FEB 21, 2018 <===
2      73   DEC 7, 1998
3      72   DEC 6, 2001
       72   JAN 1, 1876
5      69   FEB 24, 2017
       69   JAN 6, 2007
7      68   FEB 25, 2017
       68   DEC 4, 1982
       68   JAN 4, 1950
       68   FEB 27, 1880
       68   FEB 12, 1872

A TOTAL OF 9.83 INCHES OF PRECIPITATION FELL WHICH WAS 1.31 INCHES
ABOVE NORMAL. THE HEAVIEST PRECIPITATION FELL ON JANUARY 12-13
DURING THE JANUARY THAW WHEN 1.20 INCHES OF RAIN FELL. THE WETTEST
WINTER ON RECORD WAS IN 2007-08 WHEN 16.68 INCHES OF PRECIPITATION
FELL. THE DRIEST WAS IN 1979-80 WHEN ONLY 3.14 INCHES WAS RECORDED.

THERE WAS 56.9 INCHES OF SNOWFALL WHICH WAS 12.0 INCHES ABOVE
NORMAL. THE HEAVIEST SNOW FELL ON JANUARY 4 WHEN 13.0 INCHES OF SNOW
WAS RECORDED ALONG WITH BLIZZARD CONDITIONS. THE SNOWIEST WINTER ON
RECORD WAS 1950-51 WHEN 102.0 INCHES WAS RECORDED. THE LEAST SNOWY
WAS IN 1929-30 WHEN 13.8 INCHES FELL.

THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN WINTER 2017/18...
DATE    RECORD                               PREVIOUS
FEB 21  74  - WARMEST HIGH TEMPERATURE       64 IN 1872

$$

KIMBLE



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