Saturday, September 28, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, SEPTEMBER 28, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0539E
SUNSET: 1730E
MIX OF CLOUDS AND SUNSHINE, PLEASANT DAY SO FAR….
Clouds filled the majority of the sky this morning, but sunshine has become
more abundant as we head into the early afternoon. Aside from some fog, which
shrouded the summit for a brief period before the 7am observation, most
of the cloud cover has been in the mid and upper levels.
Temperatures today remain on the warm side, with readings rising from the
upper 50s this morning into the lower 70s by the afternoon. The dew point
has slightly fallen, from 60F this morning to the upper 50s by the 1pm
observation.
Winds, like yesterday, remain light, though speeds have picked up a touch
in recent hours. The average so far is only 6mph, with flow generally out
of the east-northeast. The peak gust occurred a few minutes before 1pm, with a
value of 19mph.
Visibility began poor as the fog and low clouds were present this morning,
but has since improved to 60 miles.
The maximum temperature so far today is 72F, which is 4 degrees above
the normal high of 68F. The minimum temperature since midnight is 58F,
which is 7 degrees above the normal low of 51F.
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Today’s Observations:
7 A.M.
Weather: Broken altocumulus/altostratus, thin broken cirrus,
few stratus distant S-W-NW
Temperature: 60F; Dew Point: 60F; Relative Humidity: 99%
Wind: ENE @ 7 kts
Sea-level pressure: 1018.0 mb; 30.06 in. Hg: falling, then rising
Visibility: 15 miles, thin fog all quadrants
6-hr Max temp: 61F
6-hr Min temp: 58F
24-hr Precip: 0.00 inches
BHO SA 1155 E120 BKN 250 -BKN 15 180/60/60/0607/006/ FEW ST DSNT S-W-NW
THN F ALQDS/ 8/671 53006 10061 20058
10 A.M.
Weather: Scattered stratocumulus, broken altostratus/altocumulus,
thin broken cirrus
Temperature: 66F; Dew Point: 58F; Relative Humidity: 76%
Wind: E @ 6 kts, wind light
Sea-level pressure: 1018.8 mb; 30.09 in. Hg: rising unsteadily
Visibility: 60 miles
3-hr Precip: 0.00 inches
BHO SA 1455 22 SCT E160 BKN 250 -BKN 60 188/66/58/0906/009/ WND LGT/
8/571 52008
1 P.M.
Weather: Scattered stratocumulus, broken altocumulus, thin broken cirrus
Temperature: 69F; Dew Point: 57F; Relative Humidity: 65%
Wind: ENE @ 8 kts
Sea-level pressure: 1017.3 mb; 30.04 in. Hg: falling unsteadily
Visibility: 60 miles
6-hr Max temp: 72F
6-hr Min temp: 60F
6-hr Precip: 0.00 inches
BHO SA 1755 22 SCT E170 BKN 250 -BKN 60 173/69/57/0608/004/
8/551 57015 10072 20060
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SUMMARY FOR FRIDAY, SEPTEMBER 27, 2024
TEMPERATURE (DEGREES F)
MAX…….77 NORMAL…..68
MIN…….60 NORMAL…..51
MEAN……69 NORMAL…..60
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+9
TOTAL DEPARTURE FOR THE MONTH…………………….+17 [+0.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-6
TOTAL HEATING UNITS FOR THE MONTH……………52 DEPARTURE…….-27
TOTAL HEATING UNITS FOR THE SEASON…………..63 DEPARTURE…….-34
TOTAL HEATING UNITS LAST SEASON TO DATE………72 DEPARTURE……..-9
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….4 DEPARTURE……..+3
TOTAL COOLING UNITS FOR THE MONTH……………63 DEPARTURE……..-9
TOTAL COOLING UNITS FOR THE SEASON………….757 DEPARTURE…….+89
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)……….E17 W @ 12:21 P.M.
VECTOR #1 (1-Sec)……….17 W @ 12:21 P.M.
VECTOR #2 (1-Sec)……….15 W @ 01:37 P.M.
DAVIS #1……………….15 W @ 12:21 P.M.
DAVIS #2 ………………15 W @ 01:37 P.M.
RMY #1 (Instantaneous)…..15 W @ 12:21 P.M.
RMY #2 (Instantaneous)…..15 W @ 01:37 P.M.
MERLIN…………………15 W
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………10 WNW @ 12:23 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..11 @ 12:23 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..10 @ 12:22 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………12 W @ 12:23 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………10 W @ 12:20 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..11 WNW @ 12:23 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..10 W @ 12:22 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..4.8 WNW [114 total miles]
VECTOR #1………………5.6
VECTOR #2………………5.6
DAVIS #1……………….5.1 WSW
DAVIS #2……………….4.7 W
RMY #1…………………5.5 WSW
RMY #2…………………5.6 WSW
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…..-1.77
TOTAL PRECIPITATION FOR THE YEAR (2024)…….43.04 DEPARTURE…..+4.83
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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/…/.. 26 S VEC1 26 S RMY 29
9/27 77/60/69/+9/0.00/…/.. 17 W VEC1 17 W RMY 15
9/28 The low since midnight is 58F, the daily normal low is 51F.
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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 28
HIGH 86F IN 2014
LOW 33F IN 1897,1947
PRECIP 2.46 INCHES IN 2004
PEAK GUST 69 MPH NE IN 1962
RECORDS FOR SEPTEMBER 29
HIGH 85F IN 1952
LOW 28F IN 1914 (SEPTEMBER MINIMUM RECORD)
PRECIP 2.61 INCHES IN 1907
PEAK GUST 62 MPH S IN 2005
TODAY’S REPORT PREPARED BY: Joshua Polen
