Monday, September 2, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, SEPTEMBER 2, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0511E
SUNSET: 1816E
DRIER AIR MASS MOVES IN BEHIND COLD FRONT….
A cold front moved through the area overnight, and behind it
the dew point has dropped a decent amount, falling into the lower
50s by the late morning. There has been a fair bit of cloudiness,
with altocumulus and cirrus being the most prevalent cloud types
in the morning, followed by cumulus popping up later. Overall though,
there has been plenty of sunshine, and it has been an incredible day to
get outside and enjoy the outdoors.
The temperature began the morning in the low 60s, before rising into
the upper 70s by noon time. As before mentioned, the dew point is much
lower than yesterday, and has fallen further from the mid 50s to 50F by
the last observation at 1pm.
Winds were busier yesterday afternoon through the overnight, and
have now slowed somewhat. The flow is now out of the northwest, with an
average speed of 9mph. The peak gust occurred just after noon time,
with a value of about 24mph.
Visibility has greatly improved as the dry air mass moves in, ranging from
60-80 miles throughout the day!
The maximum temperature so far today is 79F, which is 2 degrees
above the normal high of 77F. The minimum temperature since
midnight is 63F, which is 3 degrees above the normal low of 60F.
————————————————————–
PRELIMINARY STATS FOR AUGUST 2024
TEMPERATURE, Deg. F
Avg. Max. 79.9 [-0.3]
Avg. Min. 61.6 [-1.0]
Mean 70.8 [-0.6]
24-hour corrected mean: 69.7
Max. for month: 94F on the 2nd
Min. for month: 51F on the 21st
HEATING DEGREE DAYS
Total heating units: 11 [ 000]
Total for the season: 11 [-007]
Total for last season: 1
COOLING DEGREE DAYS
Total cooling units: 197 [-012]
Total for the season: 694 [+098]
Total for last season: 570
PRECIPITATION, Inches
Total: 2.96 [-0.95]
Greatest in 24 hrs: 0.82 on the 9th-10th
SNOWFALL, Inches
Total: 0.0 [ 0.0]
Greatest in 24 hrs: 0.0 on the N/A
WIND, mph
Avg. uncorrected wind speed: 8.4 mph
Avg. corrected wind speed: 9.2 mph
Prevailing wind direction: West [14%]
Peak gust and direction: 50 SSW on the 9th
SUNSHINE:
Campbell-Stokes card minutes: 15342 of a possible 24780, or 62%
Astronomical total minutes: 15905 of a possible 25704, or 62%
————————————————————–
Today’s Observations:
7 A.M.
Weather: Scattered altocumulus/castellanus, thin scattered cirrus
Temperature: 67F; Dew Point: 56F; Relative Humidity: 69%
Wind: N @ 9 kts
Sea-level pressure: 1014.0 mb; 29.94 in. Hg: rising unsteadily
Visibility: 80 miles
6-hr Max temp: 67F
6-hr Min temp: 56F
24-hr Precip: Trace
BHO SA 1155 85 SCT 250 -SCT 80 140/67/56/3509/994/ 8/081 52019 70000
10069 20063
10 A.M.
Weather: Broken altocumulus, broken cirrus,
few cumulus distant SW-NW-NNE
Temperature: 75F; Dew Point: 56F; Relative Humidity: 52%
Wind: N @ 5 kts, wind light
Sea-level pressure: 1015.8 mb; 30.00 in. Hg: rising unsteadily
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E70 BKN 250 BKN 70 158/75/56/3505/000/ FEW CU DSNT SW-NW-NNE
WND LGT/ 8/251 52018
1 P.M.
Weather: Broken cumulus, broken altocumulus, broken cirrus
Temperature: 76F; Dew Point: 50F; Relative Humidity: 40%
Wind: NW @ 08G15 kts
Sea-level pressure: 1015.6 mb; 29.99 in. Hg: falling, then steady
Visibility: 60 miles
6-hr Max temp: 79F
6-hr Min temp: 67F
6-hr Precip: 0.00 inches
BHO SA 1755 E55 BKN 90 BKN 250 BKN 60 156/76/50/3208G15/999/ 8/251 56002
10079 20067
————————————————————–
SUMMARY FOR SUNDAY, SEPTEMBER 1, 2024
TEMPERATURE (DEGREES F)
MAX…….82 NORMAL…..78
MIN…….67 NORMAL…..60
MEAN……75 NORMAL…..69
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+6
TOTAL DEPARTURE FOR THE MONTH……………………..+6 [+5.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH…………….0 DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE SEASON…………..11 DEPARTURE……..-8
TOTAL HEATING UNITS LAST SEASON TO DATE……….3 DEPARTURE……..+8
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY……………10 DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE MONTH……………10 DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE SEASON………….704 DEPARTURE……+103
TOTAL COOLING UNITS LAST SEASON TO DATE……..570 DEPARTURE……+134
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)……….E28 SSW @ 03:00 P.M.
VECTOR #1 (1-Sec)……….27 SW @ 01:57 P.M.
VECTOR #2 (1-Sec)……….27 SW @ 01:57 P.M.
DAVIS #1……………….27 S @ 01:10 P.M.
DAVIS #2 ………………27 SW @ 01:57 P.M.
RMY #1 (Instantaneous)…..28 SSW @ 03:00 P.M.
RMY #2 (Instantaneous)…..29 SW @ 01:57 P.M.
MERLIN…………………25 SW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………21 SSW @ 03:02 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20 @ 01:59 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21 @ 03:01 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 SSW @ 03:01 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 SSW @ 03:01 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 SW @ 01:59 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 SSW @ 03:01 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….11.9 SW [285 total miles]
VECTOR #1……………..12.0
VECTOR #2……………..12.5
DAVIS #1………………11.5 SW
DAVIS #2………………12.3 SW
RMY #1………………..11.9 SW
RMY #2………………..12.6 SSW
RICHARDS (C5C)…………OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH………….TRACE DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE YEAR (2024)…….41.21 DEPARTURE…..+6.49
————————————————————–
PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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
8/1 92/71/82/+9/T/779/90 24 W VEC1 24 W RMY 23
8/2 94/73/84/+11/0.01/579/67 31 SSW VEC1 31 SSW RMY 30 TSTM
8/3 92/75/84/+11/0.00/612/71 29 W VEC1 28 W RMY 28
8/4 85/68/77/+4/0.20/318/37 29 WSW VEC1 29 WSW RMY 31 TSTM
8/5 90/67/79/+6/T/686/80 28 SSW VEC1 28 SSW RMY 29
8/6 73/60/67/-6/0.56/009/01 26 ENE VEC1 26 ENE RMY 26
8/7 69/57/63/-10/0.18/119/14 25 NE VEC1 23 NE RMY 23
8/8 72/58/65/-7/0.09/187/22 20 ESE VEC1 20 ESE RMY 19
8/9 82/62/72/0/0.48/127/15 50 SSW VEC1 48 S RMY 50
8/10 85/68/77/+5/0.37/659/78 41 SSW VEC1 41 SSW RMY 43
8/11 81/63/72/0/0.00/741/88 30 W VEC1 29 SW RMY 30
8/12 77/59/68/-4/0.15/638/76 35 WNW VEC1 34 WNW RMY 36
8/13 80/58/69/-3/0.00/787/94 21 NW VEC1 22 NW RMY 21
8/14 82/62/72/0/0.00/676/81 16 NNW VEC1 15 NNW RMY 15
8/15 84/62/73/+1/0.57/491/59 44 N VEC1 42 N RMY 46 TSTM
8/16 74/61/68/-4/0.00/415/50 13 ESE VEC1 13 ESE RMY 13
8/17 75/60/68/-4/0.00/323/39 17 SE VEC1 16 SE RMY 15
8/18 71/62/67/-4/0.09/008/01 18 SE VEC1 19 SE RMY 17
8/19 78/66/72/+1/0.19/164/20 23 SSW VEC1 23 SSW RMY 22 TSTM
8/20 69/54/62/-9/0.07/238/29 32 NW VEC1 32 NW RMY 33
8/21 73/51/62/-9/0.00/752/92 20 WNW VEC1 19 WNW RMY 20
8/22 73/52/63/-8/0.00/766/94 20 W VEC1 20 WNW RMY 20
8/23 81/58/70/-1/0.00/788/97 22 WNW VEC1 21 WNW RMY 22
8/24 84/61/73/+2/0.00/735/91 20 WNW VEC1 19 WNW RMY 18
8/25 84/62/73/+3/0.00/540/67 17 W VEC1 17 W RMY 17
8/26 80/64/72/+2/T/546/68 18 NE VEC1 18 NE RMY 17
8/27 83/61/72/+2/0.00/705/88 20 SW VEC1 20 WSW RMY 20
8/28 88/64/76/+6/0.00/575/72 30 WNW VEC1 30 WNW RMY 30
8/29 71/57/64/-6/0.00/739/93 24 ENE VEC1 23 ENE RMY 23
8/30 73/56/65/-4/0.00/753/95 20 E VEC1 19 ENE RMY 20
8/31 82/58/70/+1/0.00/450/57 23 SSW VEC1 22 SSW RMY 22
————————————————————–
AUGUST DAILY RECORDS TO DATE
8/3 RECORD HIGH MINIMUM TEMPERATURE OF 75F,
TIED THE PREVIOUS RECORD SET IN 2020
8/15 PEAK GUST 44 MPH N,
TIED THE PREVIOUS RECORD SET IN 1941
————————————————————–
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/…/.. 28 SSW VEC1 27 SW RMY 28
9/2 The low since midnight is 63F, the daily normal low is 60F.
————————————————————–
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 2
HIGH 99F IN 1953 (SEPTEMBER MAXIMUM RECORD)
LOW 44F IN 1909
PRECIP 2.73 INCHES IN 1947
PEAK GUST 55e MPH WNW IN 1944
RECORDS FOR SEPTEMBER 3
HIGH 95F IN 1929
LOW 43F IN 1893
PRECIP 3.82 INCHES IN 1972 (TROPICAL STORM CARRIE)
PEAK GUST 58 MPH NNE IN 1972 (TROPICAL STORM CARRIE)
TODAY’S REPORT PREPARED BY: Joshua Polen
