Climatological Report (Monthly)
Issued by NWS Caribou, ME

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CXUS51 KCAR 040746
CLMCAR


CLIMATE REPORT
NATIONAL WEATHER SERVICE CARIBOU, ME
345 AM EDT FRI MAY 4 2018

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

...THE CARIBOU ME CLIMATE SUMMARY FOR THE MONTH OF APRIL 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1939 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              86   04/27/1990
 LOW               -4   04/06/2015
HIGHEST            66   04/24        MM      MM       67  04/29
                                                          04/27
LOWEST              8   04/06        MM      MM       18  04/04
AVG. MAXIMUM     44.9              47.8    -2.9     48.9
AVG. MINIMUM     26.7              29.5    -2.8     33.5
MEAN             35.8              38.6    -2.8     41.2
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      2               1.1     0.9        0
DAYS MIN <= 32     19              19.1    -0.1       14
DAYS MIN <= 0       0               0.1    -0.1        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.19   2005
 MINIMUM         0.54   1967
TOTALS           4.62                      1.96
DAILY AVG.       0.15              0.09    0.06     0.13
DAYS >= .01        16              12.8     3.2       18
DAYS >= .10         8               7.3     0.7       11
DAYS >= .50         4               1.4     2.6        3
DAYS >= 1.00        1               0.1     0.9        0
GREATEST
 24 HR. TOTAL    1.00   04/04 TO 04/04           04/26 TO 04/26
                                                          04/21 TO 04/21EATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                                                          04/21 TO 04/21EATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S

SNOWFALL (INCHES)
RECORDS
 TOTAL           36.4   1982
TOTALS            8.8               7.4     1.4      9.8
SINCE 7/1       137.2             108.2    29.0    130.0
SNOWDEPTH AVG.     12                MM      MM        8
DAYS >= 1.0         2               2.3    -0.3        5
GREATEST
 SNOW DEPTH        22   04/07                         24  04/02
                                                          04/01
 24 HR TOTAL      5.2   04/04 TO 04/04           04/21 TO 04/21
                                                          04/21 TO 04/21EATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                                                          04/21 TO 04/21EATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S

DEGREE_DAYS
HEATING TOTAL     869               791      78      704
 SINCE 7/1       8189              8766    -577     8068
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.8
HIGHEST WIND SPEED/DIRECTION    29/250    DATE  04/05
HIGHEST GUST SPEED/DIRECTION    41/250    DATE  04/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            9
NUMBER OF DAYS PC             10
NUMBER OF DAYS CLOUDY         11

AVERAGE RH (PERCENT)     62

WEATHER CONDITIONS. NUMBER OF DAYS WITH
  0
  4
  2
  0
  2
  0
  4
HAZE                      3

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

...NORTHERN AND EASTERN MAINE APRIL CLIMATE NARRATIVE...

TEMPERATURES WERE BELOW AVERAGE THIS PAST APRIL AND RANGED FROM
1.5 TO 3 DEGREES BELOW AVERAGE. LIQUID PRECIPITATION (RAIN AND
MELTED SNOW) WAS ABOVE AVERAGE AT ALL OF THE LONG TERM CLIMATE
SITES WITH THE EXCEPTION OF HOULTON WHERE IT WAS JUST SHY OF
AVERAGE.

THE MONTH BEGAN WITH BELOW TO AT TIMES WELL BELOW AVERAGE
TEMPERATURES DURING THE FIRST HALF OF THE MONTH. THE TIME PERIOD
FROM APRIL 1-15 RANKED AS THE 3RD COLDEST ON RECORD AT HOULTON,
4TH COLDEST AT MILLINOCKET, 5TH COLDEST AT CARIBOU, AND THE 7TH
COLDEST AT BANGOR. TEMPERATURES WERE MUCH MILDER THE 2ND HALF OF
THE MONTH. THE FIRST 60 DEGREE TEMPERATURES OF THE SPRING WERE
OBSERVED FROM CARIBOU SOUTH TO BANGOR ON THE 23RD. HOULTON,
MILLINOCKET, AND BANGOR, ALL HAD A HIGH OF 70 OR WARMER ON THE
24TH, WHICH WAS THE WARMEST DAY OF THE MONTH. A LOW TEMPERATURE
RECORD WAS ESTABLISHED ON THE MORNING OF THE 15TH AT CARIBOU WHEN
THE LOW OF 12 DEGREES BROKE THE PREVIOUS RECORD OF 13 DEGREES SET
IN 1981.

LIQUID PRECIPITATION (RAIN AND MELTED SNOW) RANGED FROM 90 TO 175
PERCENT OF AVERAGE ACROSS THE REGION. A TOTAL OF 4.77 INCHES OF
RAIN AND MELTED SNOW WAS OBSERVED AT BANGOR MAKING IT THE 16TH
WETTEST APRIL ON RECORD. AT CARIBOU, A TOTAL OF 4.62 INCHES OF
RAIN AND MELTED SNOW WAS OBSERVED, WHICH MADE IT THE 3RD WETTEST
APRIL ON RECORD. HOULTON WAS THE ONLY LONG TERM CLIMATE SITE TO
HAVE BELOW AVERAGE PRECIPITATION WITH A TOTAL OF 3.46 INCHES,
WHICH WAS 42 HUNDREDTHS OF AN INCH BELOW THE 30-YEAR AVERAGE.

SNOWFALL AT CARIBOU OF 8.8 INCHES AT CARIBOU WAS 1.4 INCHES ABOVE
AVERAGE. AT BANGOR, 2.3 INCHES OF SNOW WAS OBSERVED, WHICH WAS 1.4
INCHES BELOW AVERAGE.

AT CARIBOU, THE MONTH BEGAN WITH 20 INCHES OF SNOW ON THE GROUND
AND ENDED WITH A TRACE. THE GREATEST SNOW DEPTH OF 22 INCHES WAS
OBSERVED ON THE MORNING OF THE 7TH. AT BANGOR, THE MONTH BEGAN
WITH A TRACE OF SNOW ON THE GROUND. THE GREATEST SNOW DEPTH WAS 2
INCHES ON THE MORNING OF THE 7TH, BUT THE SNOW DEPTH DROPPED TO
ZERO BY THE MORNING OF THE 8TH. IN THE NORTH WOODS, SNOW DEPTH WAS
STILL 12 TO 18 INCHES AT THE END OF THE MONTH.

THE OUTLOOK FOR MAY FROM THE CLIMATE PREDICTION CENTER CALLS FOR
AN INCREASED LIKELIHOOD OF ABOVE AVERAGE TEMPERATURES. THERE ARE
NO STRONG CLIMATE SIGNALS THAT WOULD POINT TOWARD AN UNUSUALLY WET
OR DRY MONTH.

DURING THE MONTH OF MAY THE AVERAGE HIGH TEMPERATURE AT CARIBOU
CLIMBS FROM 55 DEGREES AT THE START OF THE MONTH TO 67 DEGREES BY
THE END OF THE MONTH. THE AVERAGE LOWS RISE FROM 35 TO 45
DEGREES. THE AVERAGE MONTHLY RAINFALL IS 3.33 INCHES. AT BANGOR,
THE AVERAGE HIGH RISES FROM 60 TO 70 WHILE THE AVERAGE LOWS RISE
FROM 38 TO 47 DEGREES. ON AVERAGE, THERE IS 3.64 INCHES OF RAIN
DURING THE MONTH OF MAY. THERE IS AN INCREASE OF 1 HOUR AND 11
MINUTES OF DAYLIGHT AT CARIBOU DURING THE MONTH.

$$

CB/VJN




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