Friday, September 1, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, SEPTEMBER 1, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0509E
SUNSET: 1819E
FAVORABLE CONDITIONS CONTINUE WITH SUNNY, CLEAR SKIES
AND COMFORTABLE FALL-LIKE VIBES ON BLUE HILL TODAY…
Today has been a gorgeous start to the month. The dry air has
remained giving us low dew points and relative humidity values
with slightly lower than average temperatures. It has been a
very refreshing day overall, with only a few cumulus clouds
dotting the crisp, blue skies.
The wind has been light all day, with winds coming from the
north this morning and shifting to the east. The average speed
for the day thus far has been around 8mph. The peak gust of the
day so far occurred shortly after midnight at around 17mph.
Visibility has remained in the 60-70 mile range throughout the
day, despite a thin layer of smoke that moved into our area early
this afternoon.
The maximum temperature so far today has been 73F, which is
5 degrees below the normal high of 78F. The minimum temperature
since midnight is 52F, which is 8 degrees below the normal low
of 60F.
Through yesterday, Summer of 2023 (Jun-Aug) is now tied for
7th 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
19.68 in 2023
9) 18.71 in 1989
10) 17.92 in 2013
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PRELIMINARY STATS FOR AUGUST 2023
TEMPERATURE, Deg. F
Avg. Max. 77.5 [-2.7]
Avg. Min. 61.6 [-1.0]
Mean 69.6 [-1.8]
24-hour corrected mean: 68.7
Max. for month: 84F on the 12th and 21st
Min. for month: 54F on the 2nd
HEATING DEGREE DAYS
Total heating units: 1 [-010]
Total for the season: 1 [-017]
Total for last season: 0
COOLING DEGREE DAYS
Total cooling units: 148 [-061]
Total for the season: 570 [-026]
Total for last season: 836
PRECIPITATION, Inches
Total: 5.68 [+1.77]
Greatest in 24 hrs: 1.50 on the 24th-25th
SNOWFALL, Inches
Total: 0.0 [0.0]
Greatest in 24 hrs: N/A
WIND, mph
Avg. uncorrected wind speed: 9.5 mph
Avg. corrected wind speed: 10.1 mph
Prevailing wind direction: South-southwest [14%]
Peak gust and direction: 39 S on the 8th, WNW on the 9th
SUNSHINE:
Campbell-Stokes card minutes: 14076 of a possible 24780, or 57%
Astronomical total minutes: 14631 of a possible 25763, or 57%
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Today’s Observations:
7 A.M.
Weather: Clear
Temperature: 57F; Dew Point: 47F; Relative Humidity: 69%
Wind: N @ 5 kts, wind light
Sea-level pressure: 1024.7 mb; 30.26 in. Hg: rising, then more slowly
Visibility: 60 miles
6-hr Max temp: 57F
6-hr Min temp: 52F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 60 247/57/47/0105/026/ CLR WND LGT/ 8/000 51016
10057 20052
10 A.M.
Weather: Clear, few distant small cumulus ESE-SSW-NNW
Temperature: 66F; Dew Point: 51F; Relative Humidity: 58%
Wind: ENE @ 7 kts
Sea-level pressure: 1014.1 mb; 29.95 in. Hg: rising, then more slowly
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 70 267/66/51/0707/032/ FEW DSNT SML CU ESE-SSW-NNW
8/100 51020
1 P.M.
Weather: Clear, few cumulus ESE-SSW
Temperature: 72F; Dew Point: 46F; Relative Humidity: 39%
Wind: ENE @ 4 kts, wind light
Sea-level pressure: 1026.4 mb; 30.31 in. Hg: rising then falling
Visibility: 60 miles, thin smoke layer aloft SE-SW-NW
6-hr Max temp: 73F
6-hr Min temp: 57F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 60 264/72/46/0704/031/ FEW CU ESE-SSW THN K LYR ALF
SE-SW-NW WND LGT/ 8/100 58003 10073 20057
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SUMMARY FOR THURSDAY, AUGUST 31, 2023
TEMPERATURE (DEGREES F)
MAX…….73 NORMAL…..78
MIN…….52 NORMAL…..61
MEAN……65 NORMAL…..69
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-4
TOTAL DEPARTURE FOR THE MONTH…………………-54 [-1.9 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…….-10
TOTAL HEATING UNITS FOR THE SEASON……………1 DEPARTURE…….-17
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE……..+1
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-4
TOTAL COOLING UNITS FOR THE MONTH…………..148 DEPARTURE…….-61
TOTAL COOLING UNITS FOR THE SEASON………….570 DEPARTURE…….-26
TOTAL COOLING UNITS LAST SEASON TO DATE……..836 DEPARTURE……-266
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)……….E30 NNW @ 06:18 A.M.
VECTOR #1 (1-Sec)……….30 NNW @ 07:09 A.M.
VECTOR #2 (1-Sec)……….31 NNW @ 06:18 A.M.
DAVIS #1……………….27 N @ 06:18 A.M.
DAVIS #2 ………………29 N @ 06:18 A.M.
RMY #1 (Instantaneous)…..30 NNW @ 06:19 A.M.
RMY #2 (Instantaneous)…..31 NNW @ 06:18 A.M.
MERLIN…………………25 N
RICHARDS (C5C) (Inst)……28 @ 07:09 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 NNW @ 06:19 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..19 @ 06:23 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 @ 06:19 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 NNW @ 06:30 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 N @ 06:19 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 NNW @ 06:30 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 NNW @ 06:19 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………19 @ 06:30 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….10.1 NNW [242 total miles]
VECTOR #1……………..10.1
VECTOR #2……………..10.3
DAVIS #1………………10.2 NNW
DAVIS #2………………10.1 N
RMY #1…………………9.8 N
RMY #2………………..10.1 N
RICHARDS (C5C)…………10.4
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH…………..5.68 DEPARTURE…..+1.77
TOTAL PRECIPITATION FOR THE YEAR…………..40.45 DEPARTURE…..+5.84
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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 75/61/68/-2/0.00/731/91 20 NE VEC1 20 NE RMY 20
8/28 73/61/67/-3/0.00/416/52 17 SSE VEC1 17 SE RMY 17
8/29 76/61/69/-1/0.11/096/12 17 ENE VEC1 16 ENE RMY 15
8/30 79/62/71/+2/0.27/215/27 29 WNW VEC1 28 WNW RMY 29
8/31 73/52/65/-4/0.00/784/99 30 NNW VEC1 30 NNW RMY 30
9/1 The low since midnight is 52F, the daily normal low is 60F
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR SEPTEMBER 1
HIGH 93F IN 1969, 2010
LOW 47F IN 1975, 2017
PRECIP 2.32 INCHES IN 2013
PEAK GUST 59e MPH S IN 1945, SSW IN 1965
RECORDS FOR SEPTEMBER 2
HIGH 99F IN 1953 (SEPTEMBER MAXIMUM RECORD)
LOW 44F IN 1909
PRECIP 2.73 INCHES IN 1947
PEAK GUST 55e MPH WNW IN 1944
TODAY’S REPORT PREPARED BY: Amanda Joly
