Climatological Report (Monthly)
Issued by NWS Caribou, ME

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CXUS51 KCAR 042335 RRA
CLMCAR

CLIMATE REPORT
NATIONAL WEATHER SERVICE CARIBOU, ME
734 PM EDT SAT NOV 4 2017

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

...THE CARIBOU ME CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1939 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              82   10/09/2011
 LOW               14   10/19/1972
                        10/22/1940
HIGHEST            79   10/04        MM      MM       76  10/07
LOWEST             28   10/13        MM      MM       27  10/15
                        10/03
AVG. MAXIMUM     62.2              52.0    10.2     56.3
AVG. MINIMUM     40.6              34.6     6.0     36.7
MEAN             51.4              43.3     8.1     46.5
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.1    -0.1        0
DAYS MIN <= 32      7              12.5    -5.5        7
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.73   1990
 MINIMUM         0.63   1955
TOTALS           6.23                      2.70
DAILY AVG.       0.20              0.11    0.09     0.08
DAYS >= .01        12              13.1    -1.1       12
DAYS >= .10         7               7.6    -0.6        7
DAYS >= .50         2               2.2    -0.2        2
DAYS >= 1.00        2               0.7     1.3        0
GREATEST
 24 HR. TOTAL    2.92   10/26 TO 10/26           10/21 TO 10/22
                                                          10/25 TO 10/25
                                                          10/25 TO 10/25

SNOWFALL (INCHES)
RECORDS
 TOTAL           12.1   1963
TOTALS            0.0               1.6    -1.6        T
SINCE 7/1         0.0               1.7    -1.7        T
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0               0.3    -0.3        0
GREATEST
 SNOW DEPTH         0   MM                             0  MM
 24 HR TOTAL      0.0   10/31 TO 10/31           10/25 TO 10/25
                                                          10/25 TO 10/25
                                                          10/25 TO 10/25

DEGREE_DAYS
HEATING TOTAL     414               673    -259      566
 SINCE 7/1        684              1140    -456      851
COOLING TOTAL       1                 0       1        0
 SINCE 1/1        222               180      42      275
......................................................

WIND (MPH)
AVERAGE WIND SPEED              8.0
HIGHEST WIND SPEED/DIRECTION    37/170    DATE  10/30
HIGHEST GUST SPEED/DIRECTION    47/180    DATE  10/30

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           14
NUMBER OF DAYS PC             10
NUMBER OF DAYS CLOUDY          7

AVERAGE RH (PERCENT)     71

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                6     RAIN                       7
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      14     FOG W/VIS <= 1/4 MILE      4
HAZE                      0

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

&&

...NORTHERN AND EASTERN MONTHLY CLIMATE NARRATIVE...

OCTOBER 2017 FINISHED AS THE WARMEST OCTOBER OF RECORD FOR THE
REGION WITH WELL ABOVE AVERAGE RAINFALL.

THE REGION AS A WHOLE AVERAGED 7.0 TO 8.5 DEGREES F ABOVE THE 1981-
2010 THIRTY YEAR MEAN WITH EACH CARIBOU, BANGOR, HOULTON, AND
MILLINOCKET EXPERIENCING THE WARMEST OCTOBER OF RECORD UPWARDS BY
AS MUCH AS ABOUT 2.5 DEGREES THEN THE PREVIOUS WARMEST OCTOBER.
CONSISTENT WARMTH MARKED THE MONTH WITH FEW DAYS BELOW AVERAGE AND
THE WARMEST HIGH TEMPERATURE ON THE 4TH. HOWEVER, THE GREATEST DAILY
DEPARTURES WERE LOGGED BETWEEN THE 24TH AND 26TH WHICH FEATURED THE
WARMEST OVERNIGHT LOW OF RECORD FOR THE MONTH AT SOME SITES ON THE
25TH.

FOR THE 2 MONTH PERIOD OF SEPTEMBER THROUGH OCTOBER IT WAS THE
WARMEST ON RECORD AT CARIBOU, HOULTON, MILLINOCKET, AND BANGOR.

ALTHOUGH THE MONTH FINISHED WITH MUCH ABOVE AVERAGE RAINFALL ACROSS
THE REGION RANGING FROM 130 TO 175 PERCENT OF NORMAL, PRIOR TO THE
25TH, THE MONTH WAS QUITE DRY WITH MANY SUNNY DAYS. THE BIG BREAK IN
THE DRY REGIME OCCURRED ON THE 25TH AND 26TH WHEN LOW PRESSURE
TRACKING WEST OF THE REGION COMBINED WITH A HIGHLY ANOMALOUS DEEP
TROPICAL ATMOSPHERIC RIVER RESULTING IN VERY HEAVY RAINFALL OF 3.50
TO 7.00 INCHES ACROSS THE AREA FOR THE TWO DAY PERIOD. ADDITIONAL
MODERATE TO HEAVY RAINFALL OCCURRED LATE ON THE 29TH THROUGH THE
30TH WITH INTENSE LOW PRESSURE TRACKING TO THE WEST OF THE REGION.
RAINFALL RANKINGS FOR THE FOUR CLIMATE LOCATIONS RANGED FROM 6TH TO
13TH WETTEST OCTOBER ON RECORD.

THE STORM ON THE 30TH WAS ALSO NOTEWORTHY BY BEING ACCOMPANIED BY
DAMAGING WINDS ESPECIALLY ACROSS DOWNEAST AND FURTHER NORTH HIGHER
TERRAIN LOCATIONS WHICH RESULTED IN MANY DOWNED TREES AND POWER
LINES AND THE MOST WIDESPREAD POWER OUTAGES SINCE THE JANUARY 1998
ICE STORM. THE AMOUNT OF DOWNED TREES WAS LIKELY FACILITATED BY NEAR
SATURATED SOILS FROM THE PRIOR RAINFALL OF THE 25TH AND 26TH. ALL AND
ALL, A NOTEWORTHY MONTH.

THE OUTLOOK FOR NOVEMBER 2017 IS CALLING FOR GREATER PROBABILITIES
OF ABOVE AVERAGE TEMPERATURE AND NEAR TO ABOVE AVERAGE PRECIPITATION.
AVERAGE LOW AND HIGH TEMPERATURES FOR THE MONTH RANGE FROM THE LOWER
20S TO MID 30S ACROSS THE EXTREME NORTH TO AROUND 30 TO UPPER 40S
ALONG THE DOWNEAST COAST. AVERAGE PRECIPITATION RANGES FROM ABOUT
3.50 INCHES ACROSS THE FAR NORTH TO ABOUT 4.25 INCHES OVER DOWNEAST
AREAS. AVERAGE SNOWFALL FOR THE MONTH RANGES FROM ABOUT 12 INCHES
ACROSS THE EXTREME NORTH TO ABOUT 1 TO 2 INCHES ALONG THE DOWNEAST
COAST. NEARLY 2 HOURS OF DAYLIGHT IS LOST DURING THE MONTH OF
NOVEMBER.

$$

VJN/CB


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