Climatological Report (Monthly)
Issued by NWS Portland, ME

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CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
1055 PM EDT WED JUN 3 2020

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

...THE GRAY ME CLIMATE SUMMARY FOR THE MONTH OF MAY 2020...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1995 TO 2020

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              95   05/18/2017
 LOW               31   05/10/2020
                        05/09/2020
                        05/01/2008
HIGHEST            88   05/28        86       2       78
                        05/22
LOWEST             31R  05/10        35      -4       36
                        05/09
AVG. MAXIMUM     65.2              65.1     0.1     60.5
AVG. MINIMUM     42.9              44.7    -1.8     43.7
MEAN             54.0              54.9    -0.9     52.1
DAYS MAX >= 90      0               0.2    -0.2        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      2               0.2     1.8        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.54   2006
 MINIMUM         0.90   2018
TOTALS           2.54              3.90   -1.36     4.88
DAILY AVG.       0.08              0.13   -0.05     0.16
DAYS >= .01         6              13.5    -7.5       18
DAYS >= .10         4               8.2    -4.2       12
DAYS >= .50         2               2.8    -0.8        4
DAYS >= 1.00        1               0.7     0.3        0
GREATEST
 24 HR. TOTAL    1.22   05/01

SNOWFALL (INCHES)
RECORDS
 TOTAL              T   2002
                        1997
TOTALS            1.1R              0.0     1.1      0.0
SINCE 7/1        70.0              83.8   -13.8     79.1
SNOWDEPTH AVG.      0
DAYS >= TRACE       1               0.0     1.0        0
DAYS >= 1.0         1               0.0     1.0        0
GREATEST
 SNOW DEPTH         T   05/09                          0
 24 HR TOTAL      1.1   05/09

DEGREE_DAYS
HEATING TOTAL     363               323      40      394
 SINCE 7/1       6906              7098    -192     7487
COOLING TOTAL      30                10      20        0
 SINCE 1/1         30                11      19        0
..............................................................



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

&&

MAY BEGAN WITH A RAINY DAY AS LOW PRESSURE TRACKING OFFSHORE DROPPED
MORE THAN AN INCH OF RAIN. AFTER A FEW MILD DAYS, A SERIES OF COLD
FRONTS BROUGHT COOLER AND DRIER AIR OUT OF CANADA. ANOTHER LOW
PRESSURE SYSTEM TRACKING SOUTH OF THE AREA COMBINED WITH THE COOL
AIR IN PLACE TO BRING RAIN CHANGING TO SNOW ON THE 8TH AND 9TH. MORE
THAN AN INCH OF SNOW FELL, THE FIRST MEASURABLE SNOW EVER RECORDED
IN THE MONTH OF MAY IN THE 24-YEAR HISTORY OF OBSERVATIONS AT THE
NWS OFFICE IN GRAY. THE LOW TEMPERATURE OF 31 DEGREES TIED AS THE
COLDEST MAY TEMPERATURE YET RECORDED. AFTER A FEW MORE COOL DAYS,
THE TEMPERATURE REBOUNDED. MORE RAIN CAME ON THE 15TH, BUT THIS
WOULD BE THE LAST MEASURABLE RAINFALL OF THE MONTH. THE PARADE OF
COLD FRONTS CONTINUED BRINGING DRY AIR IN FROM CANADA. WARM AIR
BUILDING OVER THE CENTER OF THE COUNTRY OCCASIONALLY SPILLED INTO
NEW ENGLAND BEFORE BEING PUSHED BACK BY ANOTHER COLD FRONT. THE
TEMPERATURE SOARED TO 88 DEGREES ON MAY 22 BEFORE A COLD FRONT
ARRIVED. A LONGER PERIOD OF WARM AND HUMID WEATHER CAME AT THE END
OF THE MONTH WHEN 4 STRAIGHT DAYS TOPPED 80 DEGREES.

THE AVERAGE TEMPERATURE FOR THE MONTH WAS 54.0 DEGREES WHICH WAS 0.9
DEGREES BELOW NORMAL. HIGH TEMPERATURES WERE SLIGHTLY ABOVE NORMAL,
WHILE LOW TEMPERATURES WERE WELL BELOW NORMAL, A SIGN OF THE
FREQUENT DRY AIR. THE COOLEST MAY WAS IN 2005 WHEN THE AVERAGE
TEMPERATURE WAS 49.4 DEGREES. THE WARMEST WAS 59.0 DEGREES IN 2015.
THE FOLLOWING TABLE LISTS THE COLDEST TEMPERATURES OBSERVED IN THE
MONTH OF MAY.

COLDEST TEMPERATURE IN MAY (SINCE 1996)...
RANK  TEMP  DATE
1      31   MAY 10, 2020  <===
       31   MAY 9, 2020  <===
       31   MAY 1, 2008
4      32   MAY 11, 2010
       32   MAY 10, 2010
6      33   MAY 13, 2020  <===
       33   MAY 1, 2018
       33   MAY 19, 2002
       33   MAY 5, 1997

A TOTAL OF 2.54 INCHES OF PRECIPITATION FELL WHICH WAS 1.36 INCHES
BELOW NORMAL. NEARLY HALF OF THIS PRECIPITATION FELL ON THE 1ST DAY
OF THE MONTH WHEN 1.22 INCHES WAS MEASURED. THE REST OF THE MONTH
WAS MOSTLY DRY. THE DRIEST MAY WAS IN 2018 WHEN ONLY 0.90 INCHES WAS
RECORDED. THE WETTEST WAS IN 2006 WITH 8.54 INCHES.

THE 1.1 INCHES OF SNOW THAT FELL ON MAY 9 WAS THE FIRST MEASURABLE
SNOWFALL ON RECORD IN THE MONTH OF MAY. A TRACE OF SNOWFALL HAD BEEN
RECORDED 3 TIMES IN THE 24 YEAR HISTORY OF OBSERVATIONS AT THE
NATIONAL WEATHER SERVICE OFFICE IN GRAY. THE FOLLOWING TABLE LISTS
THE LATEST SNOWFALLS ON RECORD.

LATEST MEASURABLE SNOWFALL AT GRAY (SINCE 1996)...
RANK  SNOWFALL  DATE
1        1.1    MAY 9, 2020  <===
2        0.8    APRIL 29, 2002
3        4.2    APRIL 26, 2016
4        3.6    APRIL 25-26, 2002
5        0.7    APRIL 22, 2002
6        2.5    APRIL 21-22, 2000

$$

KIMBLE


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