Monday, September 30, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, SEPTEMBER 30, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0541E
SUNSET: 1726E
SUNSHINE THROUGH THIN HIGH CLOUDS WITH ABOVE NORMAL TEMPERATURES….
As we close out the month of September, today has featured mainly
sunny skies with only some high thin cirrus clouds along with dots
of stratocumulus and cumulus clouds around. The clouds haven’t been
enough to inhibit the sunshine that much today. So all in all, it’s
been quite a nice day.
Today will finish on the dry side, as such, the total rainfall for
the month is 1.83″, which is 2.23″ below normal for the month. So
despite the decent amount of rainfall that fell late last week, we
will be finishing the month on quite a dry note.
Temperatures today have warmed into the lower 70s, which is now a
few degrees above normal (the normal high for today’s date is 67F).
The dew point briefly pushed near 60 degrees mid to late this
morning, but has since dropped back into the mid 50s this afternoon.
So after a bit of a humid feel earlier, it has become quite pleasant
this afternoon.
The wind has generally been on the light side today, even going
calm for a time this morning. The average speed for the day so far
is only around 5mph. The peak gust for the day so far is 16mph,
which occurred just before noon-time.
Visibility has been somewhat limited today, this morning by thin
fog, and this afternoon by haziness. The view has been 40-50 miles
all day.
The maximum temperature so far today is 71F, which is 4 degrees
above the normal high of 67F. The minimum temperature since midnight
is 54F, which is 4 degrees above the normal low of 50F.
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Today’s Observations:
7 A.M.
Weather: Thin broken cirrus, few cumulus offshore distant NE-SE-SSW,
few altocumulus distant WNW-NNE, patchy ground fog all quadrants
Temperature: 58F; Dew Point: 57F; Relative Humidity: 96%
Wind: Calm
Sea-level pressure: 1018.7 mb; 30.08 in. Hg: rising unsteadily
Visibility: 50 miles
6-hr Max temp: 58F
6-hr Min temp: 54F
24-hr Precip: 0.00 inches
BHO SA 1155 E250 -BKN 50 187/58/57/0000/008/ FEW CU OFFSHR DSNT
NE-SE-SSW FEW AC DSNT WNW-NNE PTCHY GF ALQDS WND CALM/ 8/251
52014 10058 20054
10 A.M.
Weather: Thin broken cirrus, few stratocumulus all quadrants,
thin smoke layer along horizon NW-NE
Temperature: 66F; Dew Point: 60F; Relative Humidity: 79%
Wind: ENE @ 4 kts, wind light
Sea-level pressure: 1019.6 mb; 30.11 in. Hg: rising, then more slowly
Visibility: 40 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E250 -BKN 40 196/66/60/0604/011/ FEW SC ALQDS THN K LYR
ALG HZN NW-NE HAZY WND LGT/ 8/501 51009
1 P.M.
Weather: Thin broken cirrus, few stratocumulus distant E-ESE,
few cumulus distant SW-NW-NNE
Temperature: 70F; Dew Point: 55F; Relative Humidity: 59%
Wind: ENE @ 7G13 kts
Sea-level pressure: 1018.5 mb; 30.08 in. Hg: falling, then more rapidly
Visibility: 50 miles
6-hr Max temp: 71F
6-hr Min temp: 58F
6-hr Precip: 0.00 inches
BHO SA 1755 E250 -BKN 50 185/70/55/0607G13/008/ FEW SC DSNT E-ESE
FEW CU DSNT SW-NW-NNE/ 8/801 58011 10071 20058
————————————————————–
SUMMARY FOR SUNDAY, SEPTEMBER 29, 2024
TEMPERATURE (DEGREES F)
MAX…….64 NORMAL…..68
MIN…….55 NORMAL…..51
MEAN……60 NORMAL…..59
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+1
TOTAL DEPARTURE FOR THE MONTH…………………….+24 [+0.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….5 DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE MONTH……………57 DEPARTURE…….-36
TOTAL HEATING UNITS FOR THE SEASON…………..68 DEPARTURE…….-43
TOTAL HEATING UNITS LAST SEASON TO DATE………89 DEPARTURE…….-21
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH……………63 DEPARTURE…….-11
TOTAL COOLING UNITS FOR THE SEASON………….757 DEPARTURE…….+88
TOTAL COOLING UNITS LAST SEASON TO DATE……..689 DEPARTURE…….+68
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)……….E16 ENE @ 07:04 A.M.
VECTOR #1 (1-Sec)……….15 NE @ 07:06 A.M.
VECTOR #2 (1-Sec)……….15 NE @ 09:00 A.M.
DAVIS #1……………….15 ENE @ 07:03 A.M.
DAVIS #2 ………………15 ENE @ 09:00 A.M.
RMY #1 (Instantaneous)…..15 ENE @ 09:00 A.M.
RMY #2 (Instantaneous)…..15 NE @ 09:00 A.M.
MERLIN…………………14 ENE
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL……………….9 NE @ 05:39 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..10 @ 11:41 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..10 @ 05:03 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………10 NE @ 11:41 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………10 ENE @ 04:55 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE………………9 NE @ 11:41 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..10 NE @ 04:54 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..5.2 ENE [124 total miles]
VECTOR #1………………5.6
VECTOR #2………………6.0
DAVIS #1……………….5.6 E
DAVIS #2……………….5.4 E
RMY #1…………………5.7 E
RMY #2…………………5.9 E
RICHARDS (C5C)………….OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..1.83 DEPARTURE…..-2.07
TOTAL PRECIPITATION FOR THE YEAR (2024)…….43.04 DEPARTURE…..+4.53
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PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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
9/1 82/67/75/+6/T/244/31 28 SSW VEC1 27 SW RMY 28
9/2 79/56/68/-1/0.00/644/82 31 NNW VEC1 31 NNW RMY 32
9/3 74/49/62/-6/0.00/766/98 23 NW VEC1 23 NNW RMY 23
9/4 80/56/68/0/0.00/732/94 18 ESE VEC1 19 SE RMY 18
9/5 77/58/68/0/0.00/737/95 20 ESE VEC1 19 ESE RMY 19
9/6 73/58/66/-2/0.00/240/31 22 E VEC1 21 ENE RMY 23
9/7 77/56/67/0/0.04/301/39 34 WNW VEC1 31 WNW RMY 33
9/8 70/50/60/-7/0.00/753/98 35 W VEC1 35 W RMY 34
9/9 75/51/63/-4/0.00/727/95 31 WNW VEC1 28 WNW RMY 30
9/10 78/56/67/+1/0.00/717/94 21 NW VEC1 20 SW RMY 21
9/11 78/53/66/0/0.00/714/94 20 S VEC1 19 S RMY 18
9/12 82/58/70/+4/0.00/711/94 20 S VEC1 19 S RMY 20
9/13 85/59/72/+7/0.00/595/79 21 SSW VEC1 20 SSW RMY 20
9/14 81/61/71/+6/0.00/691/92 21 ENE VEC1 20 ENE RMY 21
9/15 78/60/69/+4/0.00/598/80 23 SE VEC1 23 SE RMY 25
9/16 83/55/69/+5/0.00/700/94 22 SSW VEC1 21 SSW RMY 21
9/17 83/55/69/+5/0.00/453/61 16 SW VEC1 14 S RMY 15
9/18 77/60/69/+6/0.00/163/22 15 W VEC1 14 W RMY 14
9/19 69/60/65/+2/0.10/000/00 30 NE VEC1 30 NE RMY 31
9/20 64/58/61/-2/0.12/000/00 38 NE VEC1 38 NE RMY 40
9/21 58/55/57/-5/1.13/000/00 35 NNE VEC1 31 NNE RMY 31
9/22 63/54/59/-3/0.01/190/26 35 NE VEC1 31 NE RMY 34
9/23 62/52/57/-5/T/058/08 28 ENE VEC1 27 NE RMY 27
9/24 61/51/56/-5/0.01/087/12 25 ENE VEC1 22 ENE RMY 24
9/25 65/56/61/0/0.00/029/04 18 E VEC1 18 ESE RMY 18
9/26 67/56/62/+2/0.42/000/00 26 S VEC1 26 S RMY 29
9/27 77/60/69/+9/0.00/450/63 17 W VEC1 17 W RMY 15
9/28 72/57/65/+6/0.00/441/62 20 E VEC1 20 E RMY 21
9/29 64/55/60/1/0.00/014/02 16 ENE VEC1 15 NE RMY 15
9/30 The low since midnight is 54F, the daily normal low is 50F.
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SEPTEMBER 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 SEPTEMBER 30
HIGH 84F IN 1986
LOW 31F IN 1992
PRECIP 2.44 INCHES IN 2015
PEAK GUST 71 MPH S IN 2020
RECORDS FOR OCTOBER 1
HIGH 85F IN 1927
LOW 30F IN 1992
PRECIP 1.63 INCHES IN 2014
PEAK GUST 68e MPH SSE IN 1977
TODAY’S REPORT PREPARED BY: Matt Douglas
