Wednesday, October 9, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, OCTOBER 9, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0551E
SUNSET: 1711E
ANOTHER VERY PLEASANT FALL DAY IN PROGRESS UNDER MAINLY SUNNY SKIES
AND SEASONABLE TEMPERATURES….
Today is once again featuring plenty of sunshine with some building
diurnal cumulus clouds popping up thanks to a cool pool of air aloft
over the region. The air isn’t quite as clear as it was yesterday
as the visibility lowered a bit from 80 miles early this morning to
70 miles by early this afternoon. Nonetheless, it’s still a great
day for any outdoor activities.
Temperatures started the day in the mid 40s again today, but warmed
into the low to mid 60s by early this afternoon. The dew point has
been fairly steady in the low 40s all day.
Winds have been fairly steady today averaging around 9mph mainly
out of the west-northwest. It has become a bit gusty early this
afternoon, again thanks to the aforementioned mixing from aloft.
The peak gust so far is 24mph, which occurred around noon-time.
The maximum temperature so far today is 63F, which is 1 degree
below the normal high of 64F. The minimum temperature since midnight
is 46F, which is 1 degree below the normal low of 47F.
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Today’s Observations:
7 A.M.
Weather: Broken altocumulus/castellanus, broken cirrus, few towering
cumulus distant SE-SSE
Temperature: 50F; Dew Point: 42F; Relative Humidity: 74%
Wind: WNW @ 9G14 kts
Sea-level pressure: 1012.6 mb; 29.90 in. Hg: rising, then steady
Visibility: 80 miles
6-hr Max temp: 53F
6-hr Min temp: 46F
24-hr Precip: Trace
BHO SA 1155 E120 BKN 250 BKN 80 126/50/42/2909G14/990/ FEW TCU DSNT
SE-SSE/ 8/281 51004 6000/ 70000 10053 20046
10 A.M.
Weather: Scattered altocumulus/castellanus, few towering cumulus distant
NE-ENE, few cumulus distant W-NNE
Temperature: 58F; Dew Point: 41F; Relative Humidity: 52%
Wind: WNW @ 10G18 kts
Sea-level pressure: 1012.4 mb; 29.90 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 110 SCT 70 124/58/41/2810G18/990/ FEW TCU DSNT NE-ENE
FEW CU DSNT W-NNE/ 8/280 58002
1 P.M.
Weather: Broken cumulus, broken altocumulus/castellanus, cumulonimbus
offshore distant E-SE
Temperature: 60F; Dew Point: 41F; Relative Humidity: 49%
Wind: WNW @ 9G17 kts
Sea-level pressure: 1011.3 mb; 29.86 in. Hg: falling unsteadily
Visibility: 70 miles
6-hr Max temp: 63F
6-hr Min temp: 50F
6-hr Precip: 0.00 inches
BHO SA 1755 E55 BKN 110 BKN 70 113/60/41/3009G17/986/ CB OFFSHR DSNT
E-SE/ 8/380 57011 10063 20050
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SUMMARY FOR TUESDAY, OCTOBER 8, 2024
TEMPERATURE (DEGREES F)
MAX…….64 NORMAL…..64
MIN…….45 NORMAL…..47
MEAN……55 NORMAL…..55
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………0
TOTAL DEPARTURE FOR THE MONTH…………………….+21 [+2.4 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………10 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH……………45 DEPARTURE…….-25
TOTAL HEATING UNITS FOR THE SEASON………….115 DEPARTURE…….-72
TOTAL HEATING UNITS LAST SEASON TO DATE……..121 DEPARTURE……..-6
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH…………….0 DEPARTURE……..-4
TOTAL COOLING UNITS FOR THE SEASON………….757 DEPARTURE…….+83
TOTAL COOLING UNITS LAST SEASON TO DATE……..704 DEPARTURE…….+53
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all on Main Tower.
E=Estimated
F420C (Official)……….E21 NW @ 11:11 A.M.
VECTOR #1 (1-Sec)……….21 NW @ 11:11 A.M.
VECTOR #2 (1-Sec)……….21 NW @ 11:31 A.M.
DAVIS #1……………….20 NW @ 10:45 A.M.
DAVIS #2 ………………19 NW @ 11:04 A.M.
RMY #1 (Instantaneous)…..21 NW @ 11:11 A.M.
RMY #2 (Instantaneous)…..21 WNW @ 11:04 A.M.
MERLIN…………………20 NW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………13 NW @ 05:29 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14 @ 02:19 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15 @ 01:13 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………15 WNW @ 02:19 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 WNW @ 01:14 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..14 NW @ 02:19 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 WNW @ 01:13 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..8.8 NW [211 total miles]
VECTOR #1………………9.1
VECTOR #2………………9.6
DAVIS #1……………….9.2 WNW
DAVIS #2……………….9.3 NW
RMY #1…………………8.9 WNW
RMY #2…………………9.3 NW
RICHARDS (C5C)………….OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH…………..0.27 DEPARTURE…..-1.06
TOTAL PRECIPITATION FOR THE YEAR (2024)…….43.31 DEPARTURE…..+3.31
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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 66/55/61/+3/T/134/19 28 ENE VEC1 28 ENE RMY 29
10/2 66/52/59/+1/T/252/36 21 ENE VEC1 20 ENE RMY 20
10/3 72/52/62/+5/0.00/…/.. 23 S VEC1 23 S RMY 23
10/4 74/54/64/+7/0.00/…/.. 23 SW VEC1 22 SW RMY 22
10/5 72/52/62/+5/T/…/.. 24 NNW VEC1 23 NNW RMY 24
10/6 65/47/56/0/0.00/…/.. 20 SE VEC1 19 SE RMY 18
10/7 60/51/56/0/0.27/…/.. 29 SSE VEC1 29 SSE RMY 31
10/8 64/45/55/0/0.00/…/.. 21 NW VEC1 21 NW RMY 21
10/9 The low since midnight is 46F, 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
