Sunday, August 27, 2023

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

SUNDAY, AUGUST 27, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0504E
SUNSET:  1827E

COOLER WITH ONSHORE FLOW AND VARIABLE AMOUNT OF CLOUD COVER…

Today is cooler and a bit less humid than yesterday with an
onshore flow following a frontal passage last night. The sky
cover has varied between scattered clouds and periods of
overcast. All in all not a bad day to be outside.

Temperatures have made it to the mid 70s which is just below
normal for today’s date. The dew point is in the low to mid
60s. So it is still a bit humid, but not as bad as it was
yesterday.

The wind has been on the lighter side, but fairly steady out
of the northeast and east-northeast. The average speed so far
today is around 10mph. The peak gust so far, which occurred
just after 8:30 this morning, is around 20mph.

Visibility has been generally between 40-50 miles for the most
part today.

The maximum temperature so far today has been 74F, which is
5 degrees below the normal high of 79F. The minimum temperature
since midnight is 64F, which is 3 degrees above the normal low
of 61F.

Through yesterday, Summer of 2023 (Jun-Aug) is now 8th wettest
on record going back to 1886. Here are the top 10 wettest
summers as compiled by our Chief Scientist, Mike Iacono.

BHO Highest Summer (June-August) Precipitation, inches (1886-2023):

1) 25.22 in 1998
2) 24.61 in 1955
3) 24.09 in 1938
4) 21.56 in 2006
5) 21.02 in 1922
6) 20.23 in 1982
7) 19.68 in 2021
8) 19.30 in 2023 (through 8/26)
9) 18.71 in 1989
10) 17.92 in 2013

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Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus, scattered stratocumulus lenticularis,
scattered towering cumulus, scattered altocumulus/castellanus
Temperature: 67F; Dew Point: 62F; Relative Humidity: 84%
Wind: NE @ 7 kts
Sea-level pressure: 1014.0 mb; 29.94 in. Hg: rising unsteadily
Visibility: 40 miles
6-hr Max temp: 67F
6-hr Min temp: 64F
24-hr Precip: 0.00 inches
BHO SA 1155 15 SCT 35 SCT 55 SCT 100 SCT 40 140/67/62/0407/994/
TCU N-ESE SCSL W-NNE/ 8/880 52020 10067 20064

10 A.M.
Weather: Broken cumulus, broken stratocumulus, towering cumulus
distant SE-SSE
Temperature: 69F; Dew Point: 63F; Relative Humidity: 81%
Wind: ENE @ 7 kts
Sea-level pressure: 1015.1 mb; 29.98 in. Hg: rising, then more slowly
Visibility: 50 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E20 BKN 35 BKN 50 151/69/63/0607/998/ TCU DSNT SE-SSE
FEW LWR CUFRA ALQDS/ 8/800 51011

1 P.M.
Weather: Scattered cumulus, scattered stratocumulus,
scattered altocumulus
Temperature: 72F; Dew Point: 62F; Relative Humidity: 71%
Wind: ENE @ 8 kts
Sea-level pressure: 1015.1 mb; 29.98 in. Hg: rising, then falling
Visibility: 45 miles
6-hr Max temp: 74F
6-hr Min temp: 67F
6-hr Precip: 0.00 inches
BHO SA 1755 20 SCT 45 SCT 100 SCT 45 151/72/62/0708/998/
FEW LWR CUFRA ALQDS/ 8/860 50000 10074 20067

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SUMMARY FOR SATURDAY, AUGUST 26, 2023

TEMPERATURE (DEGREES F)
MAX…….83   NORMAL…..79
MIN…….68   NORMAL…..61
MEAN……76   NORMAL…..70

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+6
TOTAL DEPARTURE FOR THE MONTH…………………-46 [-2.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH…………….1  DEPARTURE……..-7
TOTAL HEATING UNITS FOR THE SEASON……………1  DEPARTURE…….-14
TOTAL HEATING UNITS LAST SEASON TO DATE……….0  DEPARTURE……..+1

COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY……………11  DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE MONTH…………..133  DEPARTURE…….-50
TOTAL COOLING UNITS FOR THE SEASON………….555  DEPARTURE…….-15
TOTAL COOLING UNITS LAST SEASON TO DATE……..790  DEPARTURE……-235

PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.
E=Estimated

F420C (Official)……….E23 SSW  @  12:24 A.M.
VECTOR #1 (1-Sec)……….22 SSW  @  12:28 A.M.
VECTOR #2 (1-Sec)……….22 SSW  @  12:44 A.M.
DAVIS #1……………….21 S    @  12:09 A.M.
DAVIS #2 ………………21 S    @  12:17 A.M.
RMY #1 (Instantaneous)…..22 SSW  @  12:17 A.M.
RMY #2 (Instantaneous)…..23 SSW  @  12:44 A.M.
MERLIN…………………M
RICHARDS (C5C) (Inst)……20      @  12:17 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL……………….15 SSW @  12:44 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE……………15     @  12:18 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE……………16     @  12:19 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…………….15 S   @  12:19 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE…………….16 SSW @  12:19 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE………………15 SSW @  12:10 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE………………17 SSW @  12:19 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……….15     @  12:19 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………6.8 WNW [162 total miles] VECTOR #1……………….7.4
VECTOR #2……………….7.7
DAVIS #1………………..7.1 WSW
DAVIS #2………………..7.3 W
RMY #1………………….7.2 W
RMY #2………………….7.7 W
RICHARDS (C5C)…………..7.6

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH…………..5.30 DEPARTURE…..+1.99
TOTAL PRECIPITATION FOR THE YEAR…………..40.07 DEPARTURE…..+6.06

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PRELIMINARY CLIMATE SUMMARY FOR AUGUST CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY:  R.M. Young #1 wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M:    Missing data

8/1   76/58/67/-6/0.00/763/88             24 NW  VEC1 24 NW  RMY 24
8/2   75/54/65/-8/0.00/830/96             23 SSW VEC1 22 SSW RMY 23
8/3   79/59/69/-4/0.00/725/84             32 SSW VEC1 34 SSW RMY 34
8/4   77/62/70/-3/T/172/20                29 SSW VEC1 29 SSW RMY 29
8/5   83/66/75/+2/0.00/523/61             18 NW  VEC1 16 WNW RMY 17
8/6   82/60/71/-2/0.00/839/98             20 W   VEC1 19 W   RMY 19
8/7   72/65/69/-4/0.14/034/04             29 SSE VEC1 30 SSE RMY 29
8/8   82/68/75/+3/0.47/187/22             39 S   VEC1 42 S   RMY 42
8/9   82/66/74/+2/0.00/756/89             39 WNW VEC1 38 WNW RMY 38
8/10  83/64/74/+2/0.02/254/30             28 SSW VEC1 27 SSW RMY 28
8/11  80/63/72/+0/0.07/810/96             36 W   VEC1 36 W   RMY 38
8/12  84/61/73/+1/0.00/733/87             26 SSW VEC1 26 SSW RMY 26
8/13  84/68/76/+4/0.07/629/75             26 SSW VEC1 26 SSW RMY 27 TSTM
8/14  82/63/73/+1/T/536/64                25 W   VEC1 24 W   RMY 29
8/15  70/64/67/-5/0.70/000/00             28 NE  VEC1 27 NE  RMY 28
8/16  68/64/66/-6/T/000/00                18 ESE VEC1 19 ENE RMY 18
8/17  70/62/66/-6/T/116/14                15 E   VEC1 14 E   RMY 14
8/18  79/61/70/-1/1.48/298/36             32 W   VEC1 34 W   RMY 33 TSTM
8/19  72/57/65/-6/0.00/371/45             29 W   VEC1 30 W   RMY 30
8/20  81/59/70/-1/0.00/764/93             23 W   VEC1 22 W   RMY 21
8/21  84/64/74/+3/0.85/384/47             29 NE  VEC1 30 ENE RMY 29
8/22  75/59/67/-4/0.00/792/97             29 NNE VEC1 29 NNE RMY 29
8/23  76/56/66/-5/0.00/805/99             20 NNE VEC1 20 NNE RMY 20
8/24  78/58/68/-3/0.02/568/70             24 S   VEC1 24 S   RMY 23
8/25  69/58/64/-6/1.48/000/00             35 S   VEC1 36 S   RMY 37
8/26  83/68/76/+6/0.00/500/62             23 SSW VEC1 22 SSW RMY 22

8/27 The low since midnight is 64F, the daily normal low is 61F

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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR AUGUST 27
HIGH 99F IN 1948
LOW 44F IN 1885
PRECIP 2.77 INCHES IN 1946
PEAK GUST 48 MPH NW IN 1983

RECORDS FOR AUGUST 28
HIGH 95F IN 1948
LOW 43F IN 1885
PRECIP 1.80 INCHES IN 1922
PEAK GUST 87 MPH SSE IN 1971 (DORIA)

TODAY’S REPORT PREPARED BY: Matt Douglas