Sunday, October 8, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, OCTOBER 8, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0549E
SUNSET: 1714E
WEATHER MORE TYPICAL OF FALL RETURNS TO THE REGION TODAY…
What a stellar day today weather-wise with clear skies, save for
some passing stratocumulus clouds. Temperatures and dew points
more fitting of fall have returned as well. Just an interesting
side note, today marks the date in which the earliest snow flakes
have been observed here at Blue Hill. There were two occurrences,
in 1988 and 2001, when a trace was recorded.
The temperature dropped into the upper 40s early this morning,
and has only rebounded to the low 60s early this afternoon. The
dew point has gradually decreased as well with readings in the
low to mid 40s, certainly better than the readings in the 60s we
experienced for the last week.
The wind has been gusty today ouf of the west to west-southwest.
The average speed so far has been around 14mph with frequent
gusts over 20mph. The peak gust so far is around 30mph.
Visibility is excellent today with views of 70-80 miles being
seen. Absolutely spectacular compared to the past few days!
The maximum temperature so far today has been 62F, which is 2
degrees below the normal high of 64F. The minimum temperature
since midnight is 48F, which is 1 degree above the normal low
of 47F.
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Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus all quadrants, few altocumulus/
castellanus distant NW-NNE
Temperature: 49F; Dew Point: 45F; Relative Humidity: 85%
Wind: WSW @ 15G25 kts
Sea-level pressure: 1000.0 mb; 29.53 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 52F
6-hr Min temp: 48F
24-hr Precip: 0.16 inches
BHO SA 1155 CLR 70 000/49/45/2515G25/953/ FEW SC ALQDS FEW AC/ACC DSNT
NW-NNE/ 8/580 53028 70016 10052 20048
10 A.M.
Weather: Clear, few stratocumulus all quadrants
Temperature: 57F; Dew Point: 44F; Relative Humidity: 61%
Wind: W @ 12G24 kts
Sea-level pressure: 1000.8 mb; 29.55 in. Hg: rising, then falling
Visibility: 80 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 80 008/57/44/2812G24/955/ FEW SC ALQDS/ 8/500 50008
1 P.M.
Weather: Clear, few stratocumulus all quadrants
Temperature: 61F; Dew Point: 42F; Relative Humidity: 48%
Wind: WSW @ 13G23 kts
Sea-level pressure: 1001.5 mb; 29.57 in. Hg: rising, then steady
Visibility: 80 miles
6-hr Max temp: 62F
6-hr Min temp: 49F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 80 015/61/42/2513G23/957/ FEW SC ALQDS/ 8/500 51007
10062 20049
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SUMMARY FOR SATURDAY, OCTOBER 7, 2023
TEMPERATURE (DEGREES F)
MAX…….68 NORMAL…..64
MIN…….54 NORMAL…..47
MEAN……61 NORMAL…..56
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+5
TOTAL DEPARTURE FOR THE MONTH…………………+58 [+8.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….4 DEPARTURE……..-6
TOTAL HEATING UNITS FOR THE MONTH……………13 DEPARTURE…….-47
TOTAL HEATING UNITS FOR THE SEASON………….112 DEPARTURE…….-65
TOTAL HEATING UNITS LAST SEASON TO DATE……..163 DEPARTURE…….-51
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH……………15 DEPARTURE…….+11
TOTAL COOLING UNITS FOR THE SEASON………….704 DEPARTURE…….+30
TOTAL COOLING UNITS LAST SEASON TO DATE……..884 DEPARTURE……-180
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 WNW @ 11:32 P.M.
VECTOR #1 (1-Sec)……….29 WNW @ 11:31 P.M.
VECTOR #2 (1-Sec)……….32 WNW @ 11:34 P.M.
DAVIS #1……………….30 WNW @ 11:30 P.M.
DAVIS #2 ………………29 WNW @ 11:31 P.M.
RMY #1 (Instantaneous)…..29 WNW @ 11:31 P.M.
RMY #2 (Instantaneous)…..31 WNW @ 11:34 P.M.
MERLIN…………………30 W
RICHARDS (C5C) (Inst)……29 @ 11:36 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 WNW @ 11:36 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..19 @ 11:37 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 @ 11:34 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 W @ 11:37 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 WNW @ 11:37 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 W @ 11:37 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 WNW @ 11:29 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………19 @ 11:37 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………8.8 ESE [210 total miles]
VECTOR #1……………….9.4
VECTOR #2……………….9.9
DAVIS #1………………..9.6 ESE
DAVIS #2………………..9.6 ESE
RMY #1………………….9.4 ESE
RMY #2………………….9.7 ESE
RICHARDS (C5C)………….10.0
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.16 DEPARTURE…..-0.01
TOTAL PRECIPITATION FOR THE MONTH…………..0.16 DEPARTURE…..-1.00
TOTAL PRECIPITATION FOR THE YEAR…………..47.22 DEPARTURE…..+7.55
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PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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
10/1 68/50/59/+1/0.00/458/65 20 NNE VEC1 20 NNE RMY 19
10/2 68/55/62/+4/0.00/681/97 24 NE VEC1 23 NE RMY 24
10/3 81/54/68/+11/0.00/672/96 18 WSW VEC1 18 WSW RMY 18
10/4 81/64/73/+16/0.00/669/96 17 S VEC1 17 S RMY 16
10/5 77/59/68/+11/0.00/…/.. 24 S VEC1 24 S RMY 23
10/6 71/60/66/+10/0.00/…/.. 20 SE VEC1 19 SE RMY 18
10/7 68/54/61/+5/0.16/…/.. 30 WNW VEC1 29 WNW RMY 29
10/8 The low since midnight is 48F, the daily normal low is 47F
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OCTOBER DAILY RECORDS TO DATE
.NONE…
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR OCTOBER 8
HIGH 81F IN 1916,1990
LOW 28F IN 1919
PRECIP 2.22 INCHES IN 1891
SNOWFALL TRACE IN 1988, 2001 (EARLIEST DATE)
PEAK GUST 60 MPH NE IN 1996
RECORDS FOR OCTOBER 9
HIGH 82F IN 2011
LOW 29F IN 1907,1937
PRECIP 2.54 INCHES IN 1976
SNOWFALL TRACE IN 1988, 2001
PEAK GUST 81e MPH S IN 1976 (RECORD FOR MONTH)
TODAY’S REPORT PREPARED BY: Matt Douglas
