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CLMPWM

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TTAA00 GYX 011103

CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
703 AM EDT FRI SEP 01 2023

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

...THE PORTLAND ME CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1941 TO 2023 (FOR TEMPERATURES)
CLIMATE RECORD PERIOD: 1871 TO 2023 (FOR PRECIPITATION)
CLIMATE RECORD PERIOD: 1882 TO 2023 (FOR SNOWFALL)

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            103   08/02/1975
 LOW              33   08/31/1965
HIGHEST           84   08/21         90      -6       96  08/07
LOWEST            50   08/02         47       3       55  08/15
AVG. MAXIMUM    75.5               78.7    -3.2     81.6
AVG. MINIMUM    59.2               59.7    -0.5     62.6
MEAN            67.3               69.2    -1.9     72.1
DAYS MAX >= 90     0                1.3    -1.3        4
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.0     0.0        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       15.22   1991
 MINIMUM        0.27   1947
TOTALS          5.80               3.57    2.23     5.63
DAILY AVG.      0.19               0.12    0.07     0.18
DAYS >= .01       15                9.4     5.6        7
DAYS >= .10        9                5.2     3.8        6
DAYS >= .50        6                1.9     4.1        3
DAYS >= 1.00       2                0.9     1.1        3
GREATEST
 24 HR. TOTAL   1.11   08/18

SNOWFALL (INCHES)
RECORDS
 TOTAL           0.0
TOTALS           0.0                0.0     0.0      0.0
SINCE 7/1        0.0                0.0     0.0      0.0
SNOWDEPTH AVG.     0
DAYS >= TRACE      0                0.0     0.0
DAYS >= 1.0        0                0.0     0.0
GREATEST
 SNOW DEPTH        0
 24 HR TOTAL       0

DEGREE DAYS
HEATING TOTAL     17                 16       1        1
 SINCE 7/1        19                 21      -2        1
COOLING TOTAL     95                146     -51      229
 SINCE 1/1       342                401     -59      514
................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.3
HIGHEST WIND SPEED/DIRECTION    25/290    DATE  08/11
                                25/350          08/31
HIGHEST GUST SPEED/DIRECTION    36/180    DATE  08/25

SKY COVER
AVERAGE SKY COVER           0.55

AVERAGE RH (PERCENT)     77

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     HEAVY RAIN                 7
RAIN                      9     LIGHT RAIN                18
FREEZING RAIN             0     LT FREEZING RAIN           0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     FOG                       17
FOG W/VIS <= 1/4 MILE     1     HAZE                       1

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

&&

SIMILAR TO JUNE AND JULY A TROUGH OF LOW PRESSURE CONTINUED TO
DOMINATE THE NORTHEAST US THROUGH MUCH OF AUGUST. THIS TROUGH OF LOW
PRESSURE CONTINUED THE THEME FOR HEAVY PRECIPITATION EVENTS IN
MAINE. DURING THE FIRST HALF OF THE MONTH THE NAO REMAINED NEGATIVE
WHILE THE PNA REMAINED POSITIVE WITH THESE TELECONNECTIONS FAVORING
A TROUGH JUST WEST OF NEW ENGLAND. THE NAO DID TREND TOWARDS NEUTRAL
AT TIMES, WHICH ALLOWED THE TROUGH AXIS TO SHIFT NEAR OVERHEAD OF
THE PORTLAND AREA AND SOMETIMES EAST OF NEW ENGLAND. THIS EASTWARD
SHIFT OF THE TROUGH AXIS ALLOWED FOR COOL AND DRY HIGH PRESSURE
SYSTEMS TO BUILD INTO THE AREA BRINGING PERIODS OF DRY WEATHER WITH
TEMPERATURES TRENDING BELOW NORMAL. TOWARDS THE END OF THE MONTH,
TROPICAL ACTIVITY INCREASED IN THE ATLANTIC BASIN WITH TROPICAL
STORMS TRACKING OFFSHORE OF THE EAST COAST. A SERIES OF FRONTAL
SYSTEMS THAT CROSSED FROM THE WEST HELPED TO PUSH THESE SYSTEM
OFFSHORE WHILE AREA BEACHES DID SEE INCREASED SWELLS.

THE AVERAGE TEMPERATURE FOR THE MONTH WAS 67.3 DEGREES, WHICH WAS
1.9 DEGREES BELOW NORMAL. THE COOLEST AUGUST ON RECORD WAS IN 1964
WHEN THE AVERAGE TEMPERATURE WAS 61.1 DEGREES. THE WARMEST WAS 72.2
DEGREES IN 2018.

A TOTAL OF 5.80 INCHES OF PRECIPITATION FELL, WHICH WAS 2.23 INCHES
ABOVE NORMAL. THE HEAVIEST PRECIPITATION FELL FROM THUNDERSTORMS ON
THE 18TH WHEN 1.11 INCHES OF RAIN FELL. THE WETTEST AUGUST ON RECORD
WAS IN 1991 WHEN 15.22 INCHES OF PRECIPITATION FELL. THE DRIEST WAS
0.27 INCHES IN 1947.

NO RECORDS WERE SET OR TIED IN THE MONTH OF AUGUST AT PORTLAND.

$$

DS