Sunday, September 29, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, SEPTEMBER 29, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0540E
SUNSET: 1728E
OVERCAST WITH A COOL NORTHEASTERLY BREEZE….
We observed overcast skies with a cooling sea breeze from the northeast
at 10 mph on average. There was a thin fog this morning, but that dissipated
before we saw 80 miles of visibility. The sun broke through the overcast a
couple times in the early afternoon hours.
The monthly rainfall total in September’s last days is 1.83 inches,
1.92 inches below normal.
The maximum temperature so far today is 64F, which is 4 degrees below
the normal high of 68F. The minimum temperature since midnight is 55F,
which is 4 degrees above the normal low of 51F.
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Today’s Observations:
7 A.M.
Weather: Overcast stratocumulus
Temperature: 58F; Dew Point: 55F; Relative Humidity: 90%
Wind: NE @ 7 kts
Sea-level pressure: 1018.7 mb; 30.08 in. Hg: rising unsteadily
Visibility: 40 miles, thin fog all quadrants
6-hr Max temp: 58F
6-hr Min temp: 55F
24-hr Precip: 0.00 inches
BHO SA 1155 20 OVC 40 187/58/55/0407/008/ THN F ALQDS/ 8/5// 52006 10058 20055
10 A.M.
Weather: Overcast stratocumulus
Temperature: 61F; Dew Point: 56F; Relative Humidity: 83%
Wind: NE @ 7 kts
Sea-level pressure: 1019.3 mb; 30.10 in. Hg: rising unsteadily
Visibility: 80 miles
3-hr Precip: 0.00 inches
BHO SA 1455 20 OVC 80 193/61/56/0407/010/ 8/5// 52006
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
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SUMMARY FOR SATURDAY, SEPTEMBER 28, 2024
TEMPERATURE (DEGREES F)
MAX…….72 NORMAL…..68
MIN…….57 NORMAL…..51
MEAN……65 NORMAL…..60
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+6
TOTAL DEPARTURE FOR THE MONTH…………………….+23 [+0.6 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…….-34
TOTAL HEATING UNITS FOR THE SEASON…………..63 DEPARTURE…….-41
TOTAL HEATING UNITS LAST SEASON TO DATE………79 DEPARTURE…….-16
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…….-10
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)……….E24 E @ 2:06 P.M.
VECTOR #1 (1-Sec)……….20 E @ 2:58 P.M.
VECTOR #2 (1-Sec)……….20 E @ 1:09 P.M.
DAVIS #1……………….20 E @ 12:56 P.M.
DAVIS #2 ………………19 E @ 3:24 P.M.
RMY #1 (Instantaneous)…..21 E @ 12:56 P.M.
RMY #2 (Instantaneous)…..20 E @ 3:24 P.M.
MERLIN…………………19 E
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 E @ 2:06 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..13 @ 6:28 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16 @ 1:11 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………15 E @ 1:01 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 E @ 1:11 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..14 E @ 1:05 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 E @ 1:11 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..7.5 E [114 total miles]
VECTOR #1………………7.5
VECTOR #2………………8.0
DAVIS #1……………….8.2 E
DAVIS #2……………….7.8 E
RMY #1…………………7.8 E
RMY #2…………………7.9 ENE
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…..-1.92
TOTAL PRECIPITATION FOR THE YEAR (2024)…….43.04 DEPARTURE…..+4.68
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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 72/57/65/+6/0.00/…/.. 24 E VEC1 20 E RMY 21
9/29 The low since midnight is 55F, 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 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
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
TODAY’S REPORT PREPARED BY: Benjamin Turner
