Monday, October 9, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, OCTOBER 9, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0550E
SUNSET: 1712E
COOL AND BRISK TODAY UNDER A MIX OF SUN AND CLOUDS HERE AT BLUE HILL…
Today is another spectacular fall day here at Blue Hill. A mix
of sun and various types of clouds have been the theme today
with a cool southwest breeze.
The temperature started the day in the mid 40s, and has only
rebounded to just over 60 early this afternoon. This is actually
3 degrees below normal for the date. The dew point is on the low
side with readings holding in low 40s.
The wind has been brisk out of mainly a southwesterly direction.
The average speed so far has been around 10mph with frequent
gusts over 20mph. The peak gust so far is around 24mph.
Visibility is excellent today with views of around 80 miles
all day. Absolutely spectacular!
The maximum temperature so far today has been 61F, which is 3
degrees below the normal high of 64F. The minimum temperature
since midnight is 44F, which is 3 degrees below the normal low
of 47F.
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Today’s Observations:
7 A.M.
Weather: Clear, few cumulus/towering cumulus distant ESE-SSW,
few cirrus distant WNW-NE
Temperature: 46F; Dew Point: 41F; Relative Humidity: 81%
Wind: SSW @ 6 kts, wind light
Sea-level pressure: 1008.3 mb; 29.78 in. Hg: rising, then more rapidly
Visibility: 80 miles
6-hr Max temp: 48F
6-hr Min temp: 44F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 80 083/46/41/2106/978/ FEW CU/TCU DSNT ESE-SSW
FEW CI DSNT WNW-NE WND LGT/ 8/201 53016 10048 20044
10 A.M.
Weather: Broken altocumulus, broken cirrus, few cumulus all quadrants
Temperature: 55F; Dew Point: 40F; Relative Humidity: 56%
Wind: SW @ 8G16 kts
Sea-level pressure: 1008.4 mb; 29.78 in. Hg: rising, then falling
Visibility: 80 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E150 BKN 250 BKN 80 084/55/40/2208G16/978/ FEW CU ALQDS/
8/251 50001
1 P.M.
Weather: Broken cumulus, broken cirrus
Temperature: 58F; Dew Point: 41F; Relative Humidity: 52%
Wind: SSW @ 7 kts
Sea-level pressure: 1007.4 mb; 29.75 in. Hg: rising, then falling
Visibility: 80 miles
6-hr Max temp: 61F
6-hr Min temp: 46F
6-hr Precip: 0.00 inches
BHO SA 1755 E45 BKN 250 BKN 80 074/58/41/2107/975/ 8/201 58010 10061 20046
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SUMMARY FOR SUNDAY, OCTOBER 8, 2023
TEMPERATURE (DEGREES F)
MAX…….63 NORMAL…..64
MIN…….48 NORMAL…..47
MEAN……56 NORMAL…..55
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+1
TOTAL DEPARTURE FOR THE MONTH…………………+59 [+7.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….9 DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH……………22 DEPARTURE…….-48
TOTAL HEATING UNITS FOR THE SEASON………….121 DEPARTURE…….-66
TOTAL HEATING UNITS LAST SEASON TO DATE……..178 DEPARTURE…….-57
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 W @ 08:20 A.M.
VECTOR #1 (1-Sec)……….30 WNW @ 01:48 A.M.
VECTOR #2 (1-Sec)……….35 WNW @ 01:48 A.M.
DAVIS #1……………….31 W @ 02:15 A.M.
DAVIS #2 ………………34 WNW @ 01:49 A.M.
RMY #1 (Instantaneous)…..30 W @ 07:11 A.M.
RMY #2 (Instantaneous)…..35 WNW @ 01:48 A.M.
MERLIN…………………30 W
RICHARDS (C5C) (Inst)……31 @ 02:14 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 WNW @ 01:51 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..22 @ 08:19 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 @ 01:50 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………23 WSW @ 08:19 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 WNW @ 01:50 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 W @ 08:19 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 WNW @ 01:50 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………21 @ 01:50 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..13.5 WSW [324 total miles]
VECTOR #1………………13.4
VECTOR #2………………14.0
DAVIS #1……………….13.7 WSW
DAVIS #2……………….14.0 W
RMY #1…………………13.1 WSW
RMY #2…………………13.8 WSW
RICHARDS (C5C)………….13.2
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH…………..0.16 DEPARTURE…..-1.17
TOTAL PRECIPITATION FOR THE YEAR…………..47.38 DEPARTURE…..+7.38
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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 63/48/56/+1/0.00/…/.. 30 W VEC1 30 WNW RMY 30
10/9 The low since midnight is 44F, 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 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)
RECORDS FOR OCTOBER 10
HIGH 85F IN 1949
LOW 27F IN 1929
PRECIP 2.02 INCHES IN 1998
SNOWFALL 6.8 INCHES IN 1979 (RECORD FOR MONTH)
PEAK GUST 59 MPH WNW IN 1958
TODAY’S REPORT PREPARED BY: Matt Douglas
